GX-2012 Operator’s Manual Part Number: 71-0239RK Revision: H Released: 3/17/14 www.rkiinstruments.
WARNING Read and understand this instruction manual before operating instrument. Improper use of the gas monitor could result in bodily harm or death. Periodic calibration and maintenance of the gas monitor is essential for proper operation and correct readings. Please calibrate and maintain this instrument regularly! Frequency of calibration depends upon the type of use you have and the sensor types.
Warranty RKI Instruments, Inc. warrants the GX-2012 sold by us to be free from defects in materials, workmanship, and performance for a period of two years from the date of shipment from RKI Instruments, Inc. This includes the instrument and the original sensors. Replacement parts are warranted for 1 year from the date of their shipment from RKI Instruments, Inc. except for replacement sensors which are warranted for 2 years.
Table of Contents Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . About the GX-2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . About This Manual . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3: Using the GX-2012 in Normal Mode . . . . . . . . . . . . . . . 19 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Start Up, Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turning On the GX-2012, Normal Mode Only . . . . . . . . . . . . . . . . . Turning On the GX-2012 in Normal With All Modes Active . . . . . . . Performing a Fresh Air Adjustment, Normal Mode . . . . . . . . . . . . .
Preparing for Calibration or Bump Test . . . . . . . . . . . . . . . . . . . . . . 58 Calibrating the GX-2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Bump Testing the GX-2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Chapter 4: Using the GX-2012 in Bar Hole Mode . . . . . . . . . . . . . . 73 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Start Up, Bar Hole Mode . . . . . . . . . . . . .
Updating the Alarm Latching Settings . . . . . . . . . . . . . . . . . . . . . . Updating the Alarm Silence Settings . . . . . . . . . . . . . . . . . . . . . . . . Updating the Data Logging Interval . . . . . . . . . . . . . . . . . . . . . . . . Updating the Alarm Point Settings . . . . . . . . . . . . . . . . . . . . . . . . . Turning the Clear Data Logger Screen On or Off. . . . . . . . . . . . . . Turning the Bump Test Function On or Off . . . . . . . . . . . . . . . . . . .
Recharging the Lithium Ion Battery Pack Out of the Instrument . . Replacing the LEL and CO Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacing a Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacing the Hydrophobic Disk Filter, Cotton Filter, and Wire Mesh Disk. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1: Introduction Overview This chapter briefly describes the GX-2012. This chapter also describes the GX-2012 Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the GX-2012. About the GX-2012 Using an advanced detection system consisting of up to five gas sensors, the GX-2012 sample draw gas monitor detects the presence of combustible gas, oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S) simultaneously.
• CSA classification pending for Class I, Division I, Groups A, B, C, and D hazardous atmospheres WARNING: The GX-2012 detects oxygen deficiency, elevated levels of oxygen, combustible gases, carbon monoxide, and hydrogen sulfide, all of which can be dangerous or life threatening. When using the GX-2012, you must follow the instructions and warnings in this manual to assure proper and safe operation of the unit and to minimize the risk of personal injury.
Specifications Table 1: GX-2012 Specifications Target Gas %LEL Combustible Gas (Methane Calibration Standard)* % Volume Combustible Gas (Methane Calibration Standard) Oxygen (O2) Hydrogen Sulfide (H2S) Carbon Monoxide (CO) Range (Increment) 0-100% LEL (1% LEL) 0 - 100% vol (1% vol) 0-40.0% vol (0.1 vol%) 0-100 ppm (0.
Safety/ Regulatory Power Supply Continuous Operating Hours @ 25 °C C US pending CSA classified, “C/US”, as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D. Temperature Code T3C. • Three AA size alkaline batteries standard • Lithium Ion Battery Pack (3.
Chapter 2: Description Overview This chapter describes the GX-2012 instrument and accessories. Instrument Description The instrument includes the case, sensors, LCD, control buttons, printed circuit boards, alarm LED’s, infrared communication port, buzzer, vibrator, batteries, pump, flow chamber, and inlet filter holder.
Alkaline Version Rechargeable Version Battery Pack Battery Pack Release Latch Battery Cover Release Knob Figure 2: Components of the GX-2012, Bottom Case The Model GX-2012’s sturdy, high-impact plastic case is radio frequency (RF) resistant and is suitable for use in many environmental conditions, indoors and out. The case is dust proof and weather resistant. A rubber layer on the outside of the case protects it from scratches and impact damage.
Combustible Gas Sensors % LEL Sensor (NC-6264A) The % LEL sensor detects combustible gas in the % LEL range. It uses a catalytic element for detection. The reaction of gas with oxygen on the catalyst causes a change in the resistance of the element which affects the current flowing through it. The current is amplified by the GX-2012’s circuitry, converted to a measurement of combustible gas concentration, and displayed on the LCD.
Dummy Sensors Any unit that has less than 5 sensors will have a dummy sensor installed in one or more sensor positions. Dummy sensors are factory installed. The flat top of the dummy sensor should face up and the bottom hollow side should face down. The unit shown below is a standard 4-sensor unit for LEL/O2/ H2S/CO and has a dummy sensor installed in the %volume combustible sensor position.
Control Buttons Five control buttons are located below the LCD. They are arranged around a central button, the POWER ENTER button. The DISPLAY (ADJ) button is on the left, the RESET SILENCE button on the right, the AIRS button on the top, and the (SHIFT)T is on the bottom. Table 2: GX-2012 Control Button Functions Button Function(s) POWER ENTER • turns the GX-2012 on and off. • used during setup and calibration.
Buzzer One solid-state electronic buzzer is located inside the case. Holes on the top front of the case allow the sound to exit the case. The buzzer sounds for gas alarms, malfunctions, low battery voltage, and as an indicator during use of the GX-2012’s many display and adjustment options. Vibrator A vibrating motor inside the GX-2012 case vibrates for gas alarms, unit malfunctions, and as an indicator during normal use of the various modes of the GX-2012.
Pump A diaphragm pump inside the GX-2012 draws the sample to the sensors. It can draw sample from as far as 50 feet from the GX-2012. The pump is not user serviceable. CAUTION: Sample hose lengths of more than 50 feet are not recommended for the GX-2012 because of flow rate reduction. Flow Chamber The flow chamber is on the back of the GX-2012 and is held in place by three phillips screws.
Standard Accessories The standard accessories include the tapered rubber nozzle, belt clip, sample hose, and 10 inch probe. An optional bar hole probe is also available and is described at the end of this section. Tapered Rubber Nozzle A cone shaped 4 inch long rubber nozzle is included with the GX-2012 as standard. It can be installed on the inlet fitting by pushing the larger end over it.
Optional Accessories Several optional accessories are available for the GX-2012. They include a rechargeable lithium ion battery pack, charging stations, various special probes, a purge tee fitting, and a dilution fitting. The most commonly used optional accessories are described below. Detailed instructions regarding the use of these and other available accessories are included in other parts of this manual. Data logging accessories are briefly described in “Data Logging” on page 56.
AC Powered Charging Station The standard AC powered charging station consists of an instrument charging base and an AC adapter. The AC adapter plugs into a 115 VAC wall outlet and connects to the charging station with a jack on the end of a five foot DC output cable. The AC adapter will also work for 100 VAC or 220 VAC if an appropriate plug adapter is provided. The AC charging station is shown below in Figure 5.
DC Powered Charging Station An optional DC powered charging station is available with a vehicle plug 12 VDC adapter. It uses the same charging base as the AC charging station but comes with a velcro strap to secure the GX-2012 in the charging base.
Optional Probes Various optional probes designed for specific applications are available for the GX-2012. They include the following: • 30 inch aluminum probe Figure 7: 30 Inch Aluminum Probe This probe is designed for applications where it is necessary to put the probe tip in areas that are out of reach with the standard probe. A small breather hole near the end of the probe tube prevents interruption of sampling and a low flow alarm if the probe tip is blocked.
• 32 inch telescoping probe with dust filter Figure 10: 32 Inch Telescoping Probe with Dust Filter This probe is designed for use where it is necessary to put the probe tip in areas not accessible with the 10 inch probe with dust filter and applications where the probe tube must be collapsible for storage.
Purge Tee Fitting The 17-4430RK-01 purge fitting is used to detect gas levels in a pressurized gas stream from a pipeline or vessel being purged. The sample port of the purge fitting is inserted into the flowing gas, and the vent port will allow any excess gas to release to the atmosphere to avoid damage to pump or sensors.
Chapter 3: Using the GX-2012 in Normal Mode Overview This chapter explains how to operate the GX-2012 in Normal Mode. Normal Mode is used to perform confined space entry monitoring or general area monitoring. While in Normal Mode, Display Mode and Calibration Mode are accessible. If a standard version of the GX-2012 is ordered, it is shipped with Bar Hole Mode disabled so that the instrument only runs in Normal Mode when turned on.
4. If LNCH BRK is turned on, the Resume Datalog Screen displays. rESU 4 RESUME • Press and release the POWER ENTER button to continue accumulating time-weighted average (TWA), PEAK readings, and time in operation from the last time the GX-2012 was used. The short-term exposure limit [STEL] reading is reset each time the GX2012 is turned on. • Press and release the DISPLAY(ADJ) button to reset the accumulation of these measurements.
• If the unit is due for calibration and CL EXPRD is set to NOT USE, then the following screen displays. FAIL C--LIMIT The GX-2012 cannot be used until a calibration has been performed either by selecting AUTO CAL or ONE CAL in the Maintenance Mode menu. See “Calibrating Using Auto Calibration” on page 105 or “Calibrating Using Single Calibration” on page 108 for calibration instructions.
• If the unit is due for a bump test and BP EXPRD is set to NOT USE, then the following screen displays. FAIL B--LIMIT The GX-2012 cannot be used until a bump test has been performed by selecting BUMP in the Maintenance Mode menu. See “Performing a Bump Test” on page 111 for bump testing instructions. • If a bump test is not due or BP EXPRD is set to NO EFFECT, then the following screen appears for a few seconds indicating when the next bump test is due.
7. If ID DISP is turned on (see page 135), the User ID Screen displays for a few seconds and then the Station ID Screen displays for a few seconds. U Id -------S Id -------8. The Date/Time Screen appears for a few seconds. 2011 8 31 22:39 DATE This screen displays the current year, month, day, and time.
9. The Battery Level and Alarm Pattern Screen appears next. bAtt 3.7 AL-H V AL -- H indicates latching (hold) alarms and AL -- A indicates selfresetting (automatic) alarms. The number shown indicates the voltage of the batteries. A fully charged lithium ion battery pack will display 3.7 V. If the unit is powered by alkaline (dry cell) batteries, a “D” will appear in front of the “V” in the lower right corner. bAtt 3.7 AL-H D: V 10.
11. If the GX-2012 experiences a sensor failure during start up, a screen indicating which sensor failed displays. In the example below, the CO sensor has failed. FAIL CO ppm SENSOR If you wish to continue, press and release the RESET SILENCE button to acknowledge the failure. The gas reading for the failed sensor will be replaced by “---”. Replace the failed sensor as soon as possible. 12. The GX-2012 is now operating in Normal Mode and monitoring for gas in Measuring Mode.
DISP, CL RMNDR, and BP RMNDR. If any of these items is turned off, then the corresponding screen will not appear. It also assumes that the L./B. MODE menu item in Maintenance Mode is set to LC bH. If L./B. MODE is set to LC, the Bar Hole Mode Select Screen will not appear. If L./B. MODE is set to bH, the Leak Check Mode Select Screen will not appear. 1. Connect the tapered rubber nozzle or the sample hose to the GX-2012’s quick connect inlet fitting. 2.
NOTE: If the CO DISP parameter in Maintenance Mode is set to On, the CO channel will appear in Leak Check Mode. If the CO DISP parameter is set to OFF (factory setting), the CO channel will not appear in Leak Check Mode. See “Chapter 5: Using the GX-2012 in Leak Check Mode” on page 84 for more information. You can scroll up or down through these screens using the AIRS or (SHIFT)T buttons. 6.
channels. Once the countdown has finished, start up is complete and the unit is ready for monitoring. Turning Off the GX-2012, Normal Mode 1. Press and hold the POWER ENTER button. 2. The buzzer will pulse for about three seconds and TURN OFF will be displayed along the bottom of the screen. 3. Release the button when TURN OFF disappears. Measuring Mode, Normal Operation The GX-2012 has three operating modes within Normal Mode: Measuring Mode, Display Mode, and Calibration Mode.
NOTE: Response time increases with the length of the sample hose. Long sample hoses will require more time to show a response at the GX2012. The maximum sample hose length recommended for the GX2012 is 50 feet. Consult RKI Instruments, Inc. for longer sample hose lengths. 4. If a gas alarm occurs, take appropriate action. See “Responding to Alarms” on page 39. Using Optional Probes and Fittings This section describes how to use the 8 meter hose with floating head and the purge tee fitting.
page 19. 2. Connect the purge tee fitting to the GX-2012’s quick connect inlet fitting. 3. Insert the sample port into the flowing gas. The vent port will allow any excess gas to release to the atmosphere to avoid damage to pump or sensors. Pressurized Stream Excess Pressurized Sample Sample Port Vent Port GX-2012 Inlet Figure 15: Purge Tee Fitting Using the Dilution Fitting The external dilution fitting is a 1:1 dilution fitting.
NOTE: The GX-2012 can be calibrated either with or without the dilution fitting in place. If calibrated without the dilution fitting in place, then display readings must be doubled to determine the actual gas concentration. If calibrated with the dilution fitting in place, then a sample bag must be used during calibration, and the display readings will be the actual gas concentrations. CAUTION: If the dilution fitting is in place for calibration, do not use a demand flow regulator. Use a sample bag.
Applications with High Levels of Combustible Gas The GX-2012 provides the % LEL sensor with some protection by turning off the % LEL sensor power temporarily when it determines that a % LEL over scale (more than 100% LEL) concentration of combustible gas is present. When this happens, “OVER” is displayed below the gas list and the display units to the right of the combustible gas channel change to % volume.
you are detecting pentane and the display reads 10% LEL on the combustible gas channel, you actually have 10% LEL x 1.35 = 13.5% LEL pentane present. Table 3: LEL Hydrocarbon Conversions Gas LEL Conversion Factor (Methane Calibration) Gas LEL Conversion Factor (Methane Calibration) Acetone 1.92 Iso Butane 1.56 Acetylene 2.00 MEK 1.92 Benzene 2.00 Methane 1.00 Ethane 1.25 Methanol 1.65 Ethanol 1.75 Pentane 1.35 Ethylene 1.20 Propane 1.52 Heptane 1.92 Propylene 1.33 Hexane 1.
no 016 REC. DATA S Id 001 2011 9 27 22:37 YES/ENT. 34 O2 19.2 CO 10 H2S 7.8 NO /DISP CH4 %LEL % ppm ppm The first screen displays what snap log ID will be given to this particular set of data. This ID number increases sequentially with each set of snap log data taken. The second screen displays what Station ID will be associated with this snap log.
day, and time of the snap log, and that you should press the POWER ENTER button to save a set of snap log data. The fourth screen displays the current gas readings, and that you should press the DISPLAY (ADJ) button to exit Snap Log Mode without saving a set of snap log data. 2. You can change the Station ID to be used with the snap log by pressing the (SHIFT)T button and then pressing the DISPLAY (ADJ) button. The Station ID Select Screen will appear and the current Station ID will be flashing.
Measuring Mode, Alarms This section covers alarm indications in Measuring Mode. It also tells you how to reset the GX-2012 after an alarm has occurred and how to respond to an alarm condition. NOTE: False alarms may be caused by radio frequency (RF) or electromagnetic (EMI) interference. Keep the GX-2012 away from RF and EMI sources such as radio transmitters or large motors.
Table 4: Alarm Types and Indications Alarm Type Visual Indications Other Indications High Alarm • ALARM appears below the gas list. • Reading for the gas in alarm flashes • Alarm LEDs flash faster than warning indication • Backlight turns on • Buzzer sounds alternating between low and high pitch faster than warning indication • Vibrator pulses faster than warning indication • TWA or STEL appears below the gas list.
Table 4: Alarm Types and Indications Alarm Type Visual Indications Other Indications Sensor Failure* • FAIL appears at the bottom of the display and the failed sensor(s) are indicated • Alarm LED arrays flash Buzzer sounds a double pulsing tone (two pulses in quick succession) Clock Failure* • FAIL CLOCK appears on the display • Alarm LED arrays flash Buzzer sounds a double pulsing tone (two pulses in quick succession) System Failure* • FAIL SYSTEM appears on the display • Alarm LED arrays flash
continues to display the current alarm level. The gas reading must fall below (or rise above for an oxygen low alarm) the low alarm setting before you can reset the alarm. Press the RESET SILENCE button to reset the alarm. The LEDs turn off and the GX-2012 alarm indications on the display turn off. With ALRM SLNC OFF and LATCHING ON: The gas reading must fall below (or rise above for an oxygen low alarm) the low alarm setting before you can reset the alarm.
5. If the over range condition continues, you may need to replace the sensor that has triggered the over range alarm. 6. If the over range condition continues after you have replaced the sensor, contact RKI Instruments, Inc. for further instructions. Responding to Battery Alarms WARNING: The GX-2012 is not operational as a gas monitoring device during a dead battery alarm.
2. Attempt to change the date using the DATE menu time in Maintenance Mode. See “Updating the Date and Time Settings” on page 103. 3. If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible. Responding to System Failure Alarms 1. If a system failure occurs, the system failure screen will display an error code as shown below: FAIL 031 SYSTEM 2.
Inert Mode Inert Mode is used to measure the combustible gas and/or oxygen level in a purged environment. In order for the instrument to operate in Inert Mode, the oxygen alarm must be set to H-HH operation in which both alarms are increasing. The oxygen Warning and Alarm points are factory set at 5.0% and 10.0%. It is recommended that the %volume sensor be installed in a unit that is used to monitor combustible gas during Inert Mode operation since it does not require oxygen to work properly.
2. Once the warm up sequence is complete, the Normal Operation Screen will display and INERT will appear along the bottom of the display. CH4 O2 CO 0 20.9 0 %LEL % ppm INERT 3. Since the oxygen concentration in fresh air is above both oxygen alarm points, the GX-2012 will go into alarm if turned on in a fresh air environment. Display Mode This section describes using the GX-2012 in Display Mode.
NOTE: Each screen displays for 20 seconds. If you do not press the DISPLAY (ADJ) button to scroll to the next screen or press the POWER ENTER button to enter an item within 20 seconds, the GX2012 automatically returns to Measuring Mode. HC Range Screen This screen displays only if your GX-2012 is equipped with both the catalytic % LEL combustible sensor and the TC % volume combustible sensor. It allows you to select the display units for the combustible channel as % LEL/% volume autoranging or % volume.
The lunch break feature enables the GX-2012 to remember peak readings when it is turned off so it can continue them when it is turned on again. See “Turning On the GX-2012, Normal Mode Only” on page 19. To reset the peak readings during operation, press and hold the RESET SILENCE button for a few seconds while in the peak screen. CH4 O2 CO H2S PEAK 0 20.9 0 0.0 %LEL % ppm ppm PEAK STEL Screen The STEL Screen displays the short-term exposure limit (STEL) readings for CO and H2S only.
Alarm Points Screen The Alarm Points Screen allows you to view each channel’s alarm settings for full scale, warning, alarm, STEL (for CO and H2S only), and TWA (for CO and H2S only). The bottom line of the screen will alternate between ALARM--P, NO /DISP, and YES/ENT. dISP ALARM--P Press the POWER ENTER button to proceed to view the full scale settings. Use the AIRS or (SHIFT)T buttons to scroll through screens showing the different settings. CH4 O2 CO H2S 100 40.0 500 100.0 vol% %LEL % ppm ppm F. S.
CO H2 S 200 15.0 ppm ppm STEL CO H2S 25 10.0 ppm ppm TWA Pressing and releasing POWER ENTER while in a settings screen will cause the instrument to simulate that condition. The buzzer, LEDs, and vibration will activate. Press and release POWER ENTER again to stop the simulated alarm. Operation Time Screen The operation time screen displays the time in minutes since the GX-2012 was last turned on.
Date/Time Screen The date/time screen displays the current date and time with the order being year, month, day, time. 2011 8 31 22:39 DATE Remaining Log Time Screen The remaining log time screen displays the time remaining until the data logger memory is full. The remaining log time depends on how often the GX2012 stores data to the data log, how many channels are active, and how often the GX-2012 is turned on and off.
Clear Data Logger Screens CAUTION: Once you clear the data logger, you cannot retrieve any data previously stored in the data logger. NOTE: This item appears in Display Mode only if the DLOG DSP menu item in Maintenance Mode is turned ON. The factory setting for DLOG DSP is ON. The clear data logger screens allow you to clear the data logger storage. You can set the GX-2012 to overwrite the oldest data when the data log is full. See “Updating the Datalog Overwrite Setting” on page 129.
3. The GX-2012 displays 4 dashes and as the GX-2012 clears the data, the dashes disappear. When the last dash is gone, the GX-2012 has been cleared and the remaining log time value is reset. ---LG CLEAR Pump OFF Screen WARNING: The GX-2012 is not a gas monitoring device while the pump is off. NOTE: This item appears in Display Mode only if the POFF DSP menu item in Maintenance Mode is turned ON. The factory setting for POFF DSP is OFF. The GX-2012 pump can be turned on and off in this screen.
User ID Screen This screen displays only if ID DISP in the Maintenance Mode menu is set to ON (see “Turning the ID Display Function On or Off” on page 135). Each user ID can contain up to 16 characters but only the first 8 of those characters are visible in the instrument. Be sure that all user IDs are distinguishable from each other by viewing only the first 8 characters. For more information, see the GX-2012 Data Logger Management Program manual. The bottom line of the screen alternates between YES/ENT.
2. Use the AIRS and (SHIFT)T buttons to scroll through the 128 possible user IDs. 3. Press the POWER ENTER button to select a user ID. Station ID Screen This screen displays only if ID DISP in the Maintenance Mode menu is set to ON (see “Turning the ID Display Function On or Off” on page 135). Each station ID can contain up to 16 characters but only the first 8 of those characters are visible in the instrument.
To change a station: 1. After entering Display Mode and proceeding to the Station ID screen, press and hold the POWER ENTER button. The bottom line of this screen alternates between YES/ENT., the current station ID, and NO / DISP. S Id SEL 001 2. Use the AIRS and (SHIFT)T buttons to scroll through the 128 possible station IDs. 3. Press the POWER ENTER button to select a station ID. Snap Logging Screen The Snap Logging Screen allows you to view data from previous snap loggings.
3. If snap logs have been performed, the following screen will appear. 2011 8 31 22:39 M023 This screen indicates the year, month, day, and time that the most recent snap log was taken. The number along the bottom of the screen indicates the snap log ID number. The first snap log that is taken is given an ID of M001. The next snap log ID is M002. The ID number increases sequentially with each set of snap log data.
Peak Bar Select Screen The Peak Bar Select Screen allows you to turn the peak bar on or off. If the function is turned on, the peak bar appears along the left side of the screen during Normal Operation and on the Peak Screen in Display Mode. It shows the peak readings for each channel in bar graph format. The bottom line of this screen alternates between the current setting, NO /DISP, and YES/ENT. bAr SEL BAR OFF To adjust the peak bar selection: 1.
Data Logging NOTE: The GX-2012 logs data in both Normal Mode and Bar Hole Mode. The GX-2012 features the ability to log data to its internal memory and download it to a computer via the infrared communications port located just below the RESET SILENCE button. It logs gas readings during normal operation, alarm data, and calibration data. NOTE: The data logging function is separate from the snap logging function. For a description of the snap logging function, see “Snap Log Mode” on page 33.
Calibration Mode Calibration Mode allows you to calibrate the GX-2012’s sensor response and to bump test the GX-2012. CAUTION: BEFORE EACH DAY’S USAGE, SENSITIVITY IN THE % LEL RANGE MUST BE TESTED ON A KNOWN CONCENTRATION OF THE COMBUSTIBLE TARGET GAS, METHANE, EQUIVALENT TO 25 - 50% OF FULL SCALE CONCENTRATION (The % LEL full scale is 100% LEL). ACCURACY MUST BE WITHIN -0 to + 20% OF ACTUAL. ACCURACY MAY BE CORRECTED BY FOLLOWING THE CALIBRATION INSTRUCTIONS FOR THE COMBUSTIBLE CHANNEL BELOW.
CAUTION: If you are using a calibration kit that includes a gas bag and a fixed flow regulator or dispensing valve, do not apply gas directly to the GX-2012 with the regulator or valve or damage to the pump will result. See “Appendix A: Calibrating and Bump Testing with a Sample Bag” on page 161 for instructions to properly use a gas bag kit.
Calibrating the GX-2012 From Measuring Mode, enter Calibration Mode by pressing and holding the (SHIFT)T button, then pressing the DISPLAY(ADJ) button and releasing both. If the unit prompts you for the password, enter it by using the AIRS and (SHIFT)T buttons to select each password number and then pressing and releasing POWER ENTER to confirm it and move on to the next number. To go back a number, press and release the RESET SILENCE button.
designed for use with the RKI 4-gas calibration cylinder and is the quickest and easiest method to calibrate the GX-2012. If installed, you may also calibrate the %volume sensor separately from the standard four. • Single Calibration: This method allows you to calibrate one sensor at a time. Use this method if you are only calibrating one or two sensors, if you are calibrating only the %volume combustible sensor, or if you are not using the RKI 4-gas calibration cylinder.
3. Use the AIRS or (SHIFT)T button to alternate between the 4-gas and the % volume combustible gas calibration values screens. MAINTENANCE 50 O2 12.0 CO 50 H2S 25.0 AUTO CAL CH4 %LEL % ppm ppm MAINTENANCE CH4 100 vol% AUTO CAL 4. The gas concentrations displayed in the calibration values screens must match the gas concentrations listed on the calibration cylinders. If all concentrations match, go to step 12. If one or more concentrations do not match, continue with step 5. 5.
sensors. 11. After the last calibration gas value is set, use the AIRS button to scroll to ESCAPE and press POWER ENTER to return to the calibration gas values screens. NOTE: The RKI Four Gas Cylinder typically contains 12% O2 by volume. Be sure to set the “OXY” reading to agree with the concentration listed on the cylinder’s label, not zero. 12. Use the AIRS or (SHIFT)T button to select which sensor(s) you want to calibrate, the standard 4 sensors or the %volume combustible gas sensor.
If any of the sensors cannot calibrate to the proper value, FAIL displays along the bottom of the screen and the GX-2012 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H2S channels failed calibration. The other sensors calibrated normally. MAINTENANCE O2 % H2 S ppm FAIL The buzzer and alarm lights activate. Press and release the RESET SILENCE button after the buzzer and lights stop to reset the alarm and return to the calibration menu. Attempt to calibrate again.
of the full scale value of the target gas. For example, if you are calibrating the combustible gas channel, your calibration cylinder should have a combustible gas concentration between 10% LEL and 50% LEL. For the oxygen channel, RKI Instruments, Inc. recommends using 100% nitrogen to perform the adjustment but any concentration between 0% oxygen (100% nitrogen) and 17% oxygen can be used to make the adjustment.
3. Use the AIRS or (SHIFT)T button to display the sensor you want to calibrate (in this example the combustible gas % LEL sensor). If you have a 5 sensor unit, the %vol sensor will be one of the choices. It is shown below. MAINTENANCE CH4 --- vol% ONE CAL 4. Press and release the POWER ENTER button. The single calibration screen displays for the sensor you selected. The gas reading flashes. MAINTENANCE 0 CH4 %LEL ONE CAL 5.
8. Disconnect the tubing from the probe. 9. Repeat steps 3 through 8 for any other sensors you want to calibrate. Make sure you use an appropriate calibration cylinder for each sensor. CAUTION: When calibrating the oxygen channel, verify the concentration of oxygen listed on the cylinder’s label. For oxygen-free samples (100% nitrogen for example), set the oxygen zero setting to 0.0%. 10.
From Measuring Mode, enter Calibration Mode by pressing and holding the (SHIFT)T button, then pressing the DISPLAY(ADJ) button and releasing both. If the unit prompts you for the password, enter it by using the AIRS and (SHIFT)T buttons to select each password number and then pressing and releasing POWER ENTER to confirm it and move on to the next number. To go back a number, press and release the RESET SILENCE button.
5. Press and release the POWER ENTER button to display the bump test gas values. MAINTENANCE 50 O2 12.0 CO 50 H2S 25.0 BUMP 30 CH4 %LEL % ppm ppm 6. Use the AIRS or (SHIFT)T buttons to see the %volume combustible gas bump test value. MAINTENANCE CH4 BUMP 100 vol% 30 7. A bump test may be performed on the standard 4 sensors or on the %volume combustible sensor. Use the AIRS or (SHIFT)T buttons to display the screen for the sensor(s) you wish to bump test. 8.
10. When AUTO CAL in the BUMP--SET menu item in Maintenance Mode is set to OFF: • The instrument will indicate which channels passed or failed the bump test with a P (pass) or an F (fail) to the right of the gas. MAINTENANCE CH4 O2 CO H2 S F P F P %LEL % ppm ppm BUMP • To view the bump test gas readings press the AIRS or (SHIFT)T button. You can scroll between the bump test results and the bump test gas readings with the AIRS or (SHIFT)T button. MAINTENANCE CH4 O2 CO H2S 5 12.0 10 25.
11. When AUTO CAL in the BUMP--SET menu item in Maintenance Mode is set to ON: If all channels pass the bump test, • The following screen appears: MAINTENANCE CH4 O2 CO H2S P P P P %LEL % ppm ppm BUMP • To view the bump test gas readings press the AIRS or (SHIFT)T button. You can scroll between the bump test results and the bump test gas readings with the AIRS or (SHIFT)T buttons. MAINTENANCE CH4 O2 CO H2S 45 12.0 47 23.
calibration initiated because of a failed bump test is the difference between the bump test gas time and the calibration time defined in the BUMP--SET menu item in Maintenance Mode. MAINTENANCE CH4 O2 CO H2S CAL • 1 20.9 37 10.0 60 %LEL % ppm ppm At the end of the calibration, the instrument displays the results from both the bump test and the calibration. Use the AIRS or (SHIFT)T button to scroll between the calibration/bump test results, the bump test gas readings, and the calibration gas readings.
• To return to the BUMP screen in Calibration Mode, press POWER ENTER at any time. If any channel failed the calibration, the buzzer will sound a double pulsing tone until you press and release the POWER ENTER button. MAINTENANCE BUMP • Disconnect the tubing from the probe. 12. Unscrew the demand flow regulator from the calibration cylinder. 13. With the BUMP menu option displayed, press the (SHIFT)T button until the NORMAL menu option is displayed. 14.
Chapter 4: Using the GX-2012 in Bar Hole Mode Overview This chapter explains how to operate the GX-2012 in Bar Hole Mode. Bar Hole Mode is used to perform consistent checks of bar holes when tracking down underground gas leaks. When the GX-2012 is in Bar Hole Mode, only the combustible and oxygen channels are displayed. If a GX-2012 is intended for bar hole testing, it is shipped with Bar Hole Mode enabled so that the operator must choose which operational mode to use when the unit is turned on.
3. Press and briefly hold down the POWER ENTER button. The Normal Mode Select Screen displays. 0 O2 20.9 CO 0 H2 S 0.0 NORMAL ? CH4 vol% %LEL % ppm ppm 4. Use the AIRS or (SHIFT)T buttons to scroll to the Bar Hole Mode Select Screen. BAR HOLE MODE CH4 O2 0 20.9 vol% %LEL ppm vol% % 30 B.H. MODE? sec 5. With the Bar Hole Mode Select Screen displayed, press and release the POWER ENTER button to begin the Bar Hole Mode startup sequence.
• If the unit is due for calibration and CL EXPRD is set to NOT USE, then the following screen displays. FAIL C--LIMIT The GX-2012 cannot be used until a calibration has been performed either by selecting AUTO CAL or ONE CAL in the Maintenance Mode menu. See “Calibrating Using Auto Calibration” on page 105 or “Calibrating Using Single Calibration” on page 108 for calibration instructions.
• If the unit is due for a bump test and BP EXPRD is set to NOT USE, then the following screen displays. FAIL B--LIMIT The GX-2012 cannot be used until a bump test has been performed by selecting BUMP in the Maintenance Mode menu. See “Performing a Bump Test” on page 111 for bump testing instructions. • If a bump test is not due or BP EXPRD is set to NO EFFECT, then the following screen appears for a few seconds indicating when the next bump test is due.
8. If ID DISP is turned on (see page 135), the User ID Screen displays for a few seconds and then the Station ID Screen displays for a few seconds. U Id -------S Id -------9. The Date/Time Screen appears for a few seconds. 2011 8 31 22:39 DATE This screen displays the current year, month, date, and time. 10. The Battery Level and Alarm Pattern Screen appears next. bAtt 3.
AL -- H indicates latching (hold) alarms and AL -- A indicates selfresetting (automatic) alarms. The number shown indicates the voltage of the batteries. A fully charged lithium ion battery pack will display 3.7 V. If the unit is powered by alkaline (dry cell) batteries, a “D” will appear in front of the “V” in the lower right corner. bAtt 3.7 AL-H D: V 11.
If the CO or H2S sensor is installed and fails, press and release the RESET SILENCE button to acknowledge the failure and continue to Bar Hole Mode. 13. The GX-2012 is now operating in Bar Hole Mode. The pump is off and the following screen appears. BAR HOLE MODE CH4 O2 0 20.9 %LEL % 001 The methane and oxygen channels are displayed along with the battery charge level.
Bar Hole Testing In Bar Hole Mode, the you can initiate sampling for a fixed time period to monitor for methane and oxygen in a bar hole. The factory set time is 30 seconds. To change the bar hole sampling time, see “Updating the Bar Hole Sampling Time” on page 138. At the end of the sample period, the pump will shut off and the peak methane and minimum oxygen levels monitored during the sample period will be displayed.
Use the AIRS and (SHIFT)T buttons to scroll to the desired station ID and press and release POWER ENTER. The unit will return to the Bar Hole Measuring Screen. BAR HOLE MODE CH4 O2 0 0.0 %LEL % 001 3. Take the GX-2012 to the bar hole that will be tested. 4. Insert the probe into the bar hole and press and release the POWER ENTER button. The pump will turn on and the sample period will begin with the sample period counting down in seconds in the lower right corner of the display.
6. At the end of the sample period, the pump will shut off and the buzzer will sound, then the peak methane reading and the minimum oxygen reading for the sample period will be displayed. The peak methane reading will also be visually displayed on the graph along the left side of the screen. BAR HOLE MODE 25 19.0 CH4 O2 %LEL % PEAK PEAK 7. If a high concentration of methane is encountered, a fresh air purge can be performed to purge the hose, probe and GX-2012 of gas before the next bar hole test.
8. If other bar holes will be tested, proceed to the next bar hole and repeat steps 4 - 7. 9. To cancel a bar hole measurement or fresh air purge that is in progress, press and release the RESET SILENCE button. 10. To exit Bar Hole Mode and return to the Mode Select Screen at any time, press and hold the (SHIFT)T button for 5 seconds. Turning Off the GX-2012, Bar Hole Mode 1. Press and hold the POWER ENTER button. 2. The unit will initiate a bar hole measurement. Keep holding the POWER ENTER button.
Chapter 5: Using the GX-2012 in Leak Check Mode Overview This chapter explains how to operate the GX-2012 in Leak Check Mode. Leak Check Mode is used to pinpoint small leaks of combustible gas from valves, flanges, connections, and other potential leak points. When the GX2012 is in Leak Check Mode, only the combustible channel is displayed.
NOTE: In order for LEAK CHECK MODE to appear as a selection in the Mode Select Screen in Step 3 below, the L./B. MODE item in Maintenance Mode must be set to LC or LC bH. The factory setting is OFF. 1. Connect the tapered rubber nozzle to the inlet fitting. 2. If a sample hose is used, connect the sample hose to the GX-2012’s quick connect inlet fitting. NOTE: If a probe is used when using the GX-2012 in Leak Check Mode, use the standard probe, not the bar hole probe. 3.
NOTE: If no button is pressed for 20 seconds, the unit will proceed into whichever mode is displayed. 6. If CL RMNDR is turned on (factory setting), the screen that appears next depends on how CL EXPRD is set in the Maintenance Mode Menu (page 131). • If the unit is due for calibration and CL EXPRD is set to CONFIRM (factory setting), then the following screen displays. CAL C--LIMIT The alarm LED’s and buzzer will pulse several times. After this, press and release the RESET SILENCE button to continue.
• If calibration is not due or CL EXPRD is set to NO EFFECT, then the following screen appears for a few seconds indicating when the next calibration is due. 2011 9 30 69d NEXT CAL 7. If BP RMNDR is turned on (factory setting is OFF), the screen that appears next depends on how BP EXPRD is set in the Maintenance Mode Menu (page 133). • If the unit is due for a bump test and BP EXPRD is set to CONFIRM (factory setting), then the following screen displays.
• If a bump test is not due or BP EXPRD is set to NO EFFECT, then the following screen appears for a few seconds indicating when the next bump test is due. 2011 9 30 10d NEXTBUMP NOTE: If both CL RMNDR and BP RMNDR are turned off, a WARM UP screen will display before the warm up sequence continues. 8. If ID DISP is turned on, the User ID Screen displays for a few seconds and then the Station ID Screen displays for a few seconds. U Id -------S Id -------9. The Date/Time Screen appears for a few seconds.
10.The Battery Level and Alarm Pattern Screen appears next. bAtt 3.7 AL-H V AL -- H indicates latching (hold) alarms and AL -- A indicates selfresetting (automatic) alarms. The number shown indicates the voltage of the batteries. If the unit is powered by alkaline (dry cell) batteries, a “D” will appear before the “V” in the lower right corner. bAtt 3.7 AL-H D: V 11.The display then indicates the full scale values for all channels. 12.
unit will enter Leak Check Mode. 13.The GX-2012 is now operating in Leak Check Mode. LEAK CK MODE CH4 0 ppm 5000 ppm F.S. The combustible gas reading is displayed along with the battery charge level. Performing a Fresh Air Adjustment, Leak Check Mode Before using the GX-2012 for leak checking, it is recommended to set the fresh air reading by performing a fresh air adjustment. This will set the combustible gas channel to zero. 1. Find a fresh-air environment.
Leak Testing In Leak Check Mode, the GX-2012 only displays combustible gas readings. The increment of the reading is always 100 ppm but the display range can be adjusted by using the DISPLAY (ADJ) button. The display range choices are 500 ppm, 1000 ppm, 2000 ppm, and 5000 ppm. The readings are displayed in both numerical and bar graph form. As the gas concentration increases from 0 ppm, the alarm LEDs begin to blink in unison with the buzzer’s pulsing.
2. Move the probe tip or tapered nozzle tip back and forth along the area where a leak is suspected. 3. Observe the display reading. If the gas level increases, the numerical reading will increase, the bar graph level will increase, and the beeping and buzzer pulsing frequency will increase. 4. Your gas reading may exceed your display range or 100% LEL. For a description of both scenarios, see the following section. 5. Use the increasing and decreasing of the reading to locate the leak point. 6.
• Exceeding 100% LEL If the combustible gas level exceeds 100% LEL, the GX-2012 will display an overscale alarm. LEAK CK MODE CH4 5000 OVER %LEL ppm NOTE: If a vol% sensor is installed, “OVER” will still appear at the bottom of the screen but the instrument will display the gas reading in %volume. The GX-2012 will continue to be in overscale alarm until the gas reading decreases. The instrument will then show readings in the LEL range until the readings decrease back to the ppm range.
Peak Hold Mode Peak Hold Mode allows the user to view the peak methane reading for the operating session while viewing the current methane reading. To enter Peak Hold Mode: 1. Turn the GX-2012 on as described in “Turning On the GX-2012, Leak Check Mode” on page 84. Select the desired display range. In the example below, 500 ppm has been selected. 2. Press and hold the RESET SILENCE button until the Peak Hold Mode screen displays. LEAK CK MODE CH4 PEAK 400 PH 500 500 ppm ppm ppm F.S.
Check Mode” on page 84. Select the desired display range. In the example below, 500 ppm has been selected. Press and hold the (SHIFT)T button, then press and hold the AIRS button and hold both until you hear a beep. The Station ID Select Screen will display and the current station ID will be flashing. NOTE: If the gas levels reach a warning or alarm condition while in this screen, the GX-2012 will go into alarm. S Id SEL 001 2.
when you press POWER ENTER. The full scale display range value will continue to be displayed in the Peak Reading Screen and OVER will again be recorded when you press POWER ENTER. 4. The unit will display SAVED along the bottom of the screen before continuing to the Peak Reading Screen. LEAK CK MODE CH4 PEAK 0 ppm 500 ppm PEAK 5. Take the instrument to the monitoring area. The instrument will retain and display the highest gas concentration encountered.
Viewing Snap Log Data in Leak Check Mode Operation Snap log data can be viewed while in Leak Check Mode. If snap log data was taken while in Normal Operation, that data will also appear. 1. Turn the GX-2012 on as described in “Turning On the GX-2012, Leak Check Mode” on page 84. 2. Press and hold the RESET SILENCE button and then press and hold the DISPLAY (ADJ) button and release both. 3. If no snap logs have been performed, the following screen will appear.
operation will have two snap log ID numbers. One number is for the base reading and the other is for the peak reading. 5. To view the data in a snap log ID, press and release the POWER ENTER button. You can also go back and forth between the ID and data screens by pressing and releasing the POWER ENTER button. 2011 8 31 22:39 M011 Normal Operation Data AIRS (SHIFT)T (SHIFT)T Leak Check Mode Operation Base Data AIRS (SHIFT)T Normal Operation Data 98 • Leak Testing CO 50 23.
The gas readings that were taken during the snap log are displayed and the Station ID that was in use during the snap log is displayed along the bottom of the screen. Snap log data that was taken in Leak Check Mode operation will have 2 sequential screens that are part of one data set. One screen is for the base reading and the other screen is for the peak reading. The peak reading value will have PEAK displayed below the peak bar.
Chapter 6: Maintenance Mode Overview This chapter describes the GX-2012 in Maintenance Mode.
• update the backlight settings • turn the autozero function on or off • turn the demand zero function on or off • update the Leak Check/Bar Hole Mode setting • update the bar hole sampling time • turn Portuguese on or off • update the Leak Check Mode CO channel display setting • view the instrument’s firmware version and checksum information • turn the password function on or off and set the password The GX-2012 is factory-set to suit most applications.
2. Press and hold the AIRS and (SHIFT)T buttons, then press and hold the POWER ENTER button. When you hear a beep, release the buttons. MAINTENANCE 0000 PASSWORD The unit will prompt you for a password. 3. Enter the password by using the AIRS and (SHIFT)T buttons to select each password number and then pressing and releasing POWER ENTER to enter it and move on to the next one. To go back a number, press and release the RESET SILENCE button.
5. Once you enter Maintenance Mode, MAINTENANCE will appear along the top of the screen. The Date Screen displays. MAINTENANCE DATE 6. Use the AIRS or (SHIFT)T button to move through the menu item screens. Updating the Date and Time Settings 1. Use the AIRS or (SHIFT)T buttons to display the DATE menu item. MAINTENANCE DATE Press and release the POWER ENTER button. The date and time will be displayed with the year flashing. MAINTENANCE 2011 4 23 22:37 DATE 2.
2. Use the AIRS or (SHIFT)T buttons to navigate to the AIR CAL menu option. MAINTENANCE AIR CAL 3. Press and release the POWER ENTER button to enter AIR CAL. The current gas readings are displayed. MAINTENANCE 0 O2 20.9 CO 0 H2 S 0.0 PUSH AIR CH4 %LEL % ppm ppm 4. Hold down the AIRS button. The unit will prompt you to continue holding the AIRS button. MAINTENANCE AIr CAL HOLD AIR 5. When the unit tells you to release the AIRS button, release it.
Calibrating Using Auto Calibration If CL EXPRD is set to NOT USE and calibration becomes due, then the unit must be calibrated using this menu item and/or the next menu item, ONE CAL, because it will not be possible to enter normal operation. See “Calibration/Bump Test Supplies and Equipment” on page 57 for the items you will need to perform a calibration. These instructions assume you are using a 4-gas cylinder and a %volume methane cylinder.
7. Use the AIRS or (SHIFT)T button to alternate between the 4-gas and the %volume combustible gas calibration values screen. MAINTENANCE 50 O2 12.0 CO 50 H2S 25.0 AUTO CAL CH4 %LEL % ppm ppm MAINTENANCE CH4 100 vol% AUTO CAL 8. The gas concentrations displayed in the calibration values screens must match the gas concentrations listed on the calibration cylinders. If all concentrations match, go to step 16. If one or more concentrations do not match, continue with step 9. 9.
sensors. 15. After the last calibration gas value is set, use the AIRS button to scroll to ESCAPE and press POWER ENTER to return to the calibration gas values screen. NOTE: The RKI Four Gas Cylinder typically contains 12% O2 by volume. Be sure to set the “OXY” reading to agree with the concentration listed on the cylinder’s label, not zero. 16. Use the AIRS and (SHIFT)T buttons to select which sensor(s) you want to calibrate, the standard 4 sensors or the %volume combustible gas sensor.
19. Press and release the POWER ENTER button to set the calibration to the programmed values. If all channels passed calibration, PASS displays along the bottom of the screen, then the calibration menu displays. If any of the sensors cannot calibrate to the proper value, FAIL displays along the bottom of the screen and the GX-2012 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H2S channels failed calibration. The other sensors calibrated normally.
cylinder consists of 50% LEL methane, 12% oxygen, 50 ppm CO, 25 ppm H2S, and a balance of nitrogen. In the example below, the CH4 channel’s span is adjusted. See “Parts List” on page 158 for available calibration kits and calibration kit spare parts. Calibration cylinders that contain only one target gas may also be used for single calibration. For channels other than oxygen, RKI Instruments, Inc.
6. Press and release the POWER ENTER button to display the single calibration menu. The %LEL sensor will be displayed first. MAINTENANCE CH4 --- %LEL ONE CAL 7. Use the AIRS or (SHIFT)T button to display the sensor you want to calibrate (in this example the combustible gas % LEL sensor). If you have a 5 sensor unit, the %vol sensor will be one of the choices. It is shown below. MAINTENANCE CH4 --- vol% ONE CAL 8. Press and release the POWER ENTER button.
LCD will indicate that the calibration has ended, then the single calibration menu displays. 12. Disconnect the tubing from the probe. 13. Repeat steps 2 through 12 for any other sensors you want to calibrate. Make sure you use an appropriate calibration cylinder for each sensor. CAUTION: When calibrating the oxygen channel, verify the concentration of oxygen listed on the cylinder’s label. For oxygen-free samples (100% nitrogen for example), set the oxygen zero setting to 0.0%. 14.
to perform a bump test. These instructions assume you are using a 4-gas cylinder and a %volume cylinder. 1. Before performing a bump test, perform a fresh air adjustment as described in “Performing a Fresh Air Adjustment” on page 103. 2. Install the demand flow regulator onto the calibration cylinder. 3. Connect the sample tubing to the demand flow regulator. 4. Install the hose and probe to the GX-2012. 5. Use the AIRS or (SHIFT)T buttons to display the BUMP menu item. MAINTENANCE BUMP 6.
8. A bump test may be performed on the standard 4 sensors or on the %volume combustible sensor. Use the AIRS or (SHIFT)T buttons to display the screen for the sensor(s) you wish to bump test. 9. Before proceeding, confirm that the bump test gas value(s) are the same as the concentration(s) in the calibration cylinder. If they are not, adjust the bump test gas value(s) by entering the AUTO CAL menu item, changing the values there, and reentering the BUMP menu. 10.
• To return to the main menu, press POWER ENTER. MAINTENANCE BUMP If one or more sensors fail the bump test, see “Troubleshooting” on page 143 to investigate the cause of the failure and replace the failed sensor or sensors if necessary. • Disconnect the tubing from the probe. 12.
• To return to the main menu, press POWER ENTER. MAINTENANCE BUMP • Disconnect the tubing from the probe. If any channel fails the bump test, • The instrument will beep and a calibration is immediately and automatically started. Continue to apply the calibration gas. CAL on the bottom left of the screen will alternate with APPLY. The calibration time will begin to countdown in seconds in the lower right of the screen.
MAINTENANCE 1 O2 12.0 CO 5 H2S 23.0 BUMP/ CH4 %LEL % ppm ppm MAINTENANCE CH4 O2 CO H2 S • 49 12.0 5 25.0 /CAL %LEL % ppm ppm To return to the main menu, press POWER ENTER at any time. If any channel failed the calibration, the buzzer will sound a double pulsing tone until you press and release the POWER ENTER button. MAINTENANCE BUMP • Disconnect the tubing from the probe. 13. Unscrew the demand flow regulator from the calibration cylinder. 14.
during startup. From this screen, you can choose to continue accumulating TWA and PEAK readings and the time in operation from the last time the GX-2012 was used or start collecting new readings and reset the time in operation. 1. Use the AIRS or (SHIFT)T buttons to display the LNCH BRK menu item. MAINTENANCE LNCH BRK 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE OFF LNCH BRK 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4.
1. Use the AIRS or (SHIFT)T buttons to display the LATCHING menu item. MAINTENANCE LATCHING 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE On LATCHING 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu.
button to clear the alarm indications. 1. Use the AIRS or (SHIFT)T buttons to display the ALM SLNC menu item. MAINTENANCE ALM SLNC 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE On ALM SLNC 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu.
2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE 300 LG INTVL 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu. Updating the Alarm Point Settings The ALARM--P menu item allows you to update one or more warning, alarm, STEL, and TWA (for CO and H2S) settings (the reading at which the GX-2012 recognizes these conditions).
1. Use the AIRS or (SHIFT)T buttons to display the ALARM--P menu item. Press and release the POWER ENTER button. MAINTENANCE CH4 --- %LEL ALARM--P 2. You may then select a channel. Use the AIRS or (SHIFT)T buttons to select a channel. The combustible gas channel is shown for example. 3. Press the POWER ENTER button to display the warning setting for the combustible channel. It will be flashing. MAINTENANCE CH4 10 %LEL WARNING 4. Use the AIRS or (SHIFT)T buttons to change the warning setting. 5.
7. Press POWER ENTER to save the setting. The unit will direct you back to the Alarm Points Screen where you can use the AIRS or (SHIFT)T buttons to select the oxygen channel. MAINTENANCE O2 --- % ALARM--P Press POWER ENTER. 8. The first selection for the oxygen channel is the alarm pattern. MAINTENANCE O2 L-H ALM PTN The choices are L-H, L-LL, or H-HH. The L-H pattern provides a decreasing warning and an increasing alarm. The L-LL pattern provides a decreasing warning and a decreasing alarm.
11. Adjust the values for the warning and alarm settings using the procedure in step 4 through step 7. When you press POWER ENTER after selecting the alarm value, you will then be prompted to select the STEL value. MAINTENANCE CO 200 ppm STEL 12. Use the AIRS or (SHIFT)T buttons to change the setting and press POWER ENTER when finished to save the setting. You will then be asked to enter a TWA value. MAINTENANCE CO 25 ppm TWA 13.
14. Use the AIRS or (SHIFT)T buttons to select the H2S channel and press POWER ENTER. Adjust the values for the warning and alarm settings using the procedure in step 4 through step 7. When you press POWER ENTER after selecting the alarm value, you will then be prompted to select the STEL value as you were with the CO channel. MAINTENANCE H2S 5.0 ppm STEL 15. Use the AIRS or (SHIFT)T buttons to change the setting and press POWER ENTER when finished. You will then be asked to enter a TWA value.
set to OFF, the Clear Data Logger Screen does not appear in Display Mode and any logged data cannot be cleared from Display Mode. 1. Use the AIRS or (SHIFT)T buttons to display the DLOG DSP menu item. MAINTENANCE DLOG DSP 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE On DLOG DSP 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu.
2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE On BUMP DSP 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu. Turning the Pump Off Screen On or Off The POFF DSP menu item is used to turn the Pump Off Screen on or off.
2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE OFF POFF DSP 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu. Updating the Bump Test Parameters The BUMP--SET menu item is used to adjust the bump test parameters. NOTE: If the BUMP DSP menu item is set to OFF, this menu item does not appear. 1.
3. To update the GAS TIME setting, with the cursor next to the gas time and with GAS TIME displayed along the bottom of the screen, press POWER ENTER. The factory setting is 30 seconds. The value will begin to flash. Use the AIRS or (SHIFT)T buttons to select a new gas time. The GAS TIME is the amount of time that the instrument is exposed to gas during a bump test. The time increments are 30, 45, 60, and 90 seconds. Once a value is selected, press and release the POWER ENTER button to save it.
7. To exit the BUMP--SET menu, use the (SHIFT)T button to scroll to ESCAPE and press and release the POWER ENTER button. Updating the Confirmation Beep Setting With BEEP. SET set to ON, the GX-2012 beeps once every 5 minutes to verify that it is operating. With BEEP. SET set to OFF (factory setting), the GX-2012 does not sound a confirmation beep. 1. Use the AIRS or (SHIFT)T buttons to display the BEEP. SET menu item. Press and release the POWER ENTER button. The screen will indicate the current setting.
3. Press and release the POWER ENTER button to save the setting and return to the main menu. Updating the Calibration Interval This CL INTVL setting defines the amount of time between calibrations. The minimum setting is 1 day and the maximum setting is 365 days. The factory setting is 90 days. 1. Use the AIRS or (SHIFT)T buttons to display the CL INTVL menu item. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE 90 CL INTVL 2.
3. Press and release the POWER ENTER button to save the setting and return to the main menu. Updating the Calibration Expired Action Setting This item defines what indication is given during start up when calibration is due and CL RMNDR is set to ON. With CL EXPRD set to CONFIRM (factory setting), the GX-2012 will give an indication at start up if calibration is due and require the user to press the RESET SILENCE button to continue.
1. Use the AIRS or (SHIFT)T buttons to display the C--CHECK menu item. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE 4GAS C--CHECK 2. Use the AIRS or (SHIFT)T button to display the desired setting. 3. Press and release the POWER ENTER button to save the setting and return to the main menu. Updating the Bump Test Interval This BP INTVL setting defines the amount of time between bump tests.
Updating the Bump Test Reminder Setting With BP RMNDR set to ON, the GX-2012 will give an indication at start up if it is due for bump testing. The type of indication will depend on the BP EXPRD setting (see below). With BP RMNDR set to OFF (factory setting), the GX-2012 will give no indication at start up if it is due for bump testing. NOTE: If the BUMP DSP menu item is set to OFF, this menu item does not appear. 1. Use the AIRS or (SHIFT)T buttons to display the BP RMNDR menu item.
NOTE: If the BUMP DSP menu item is set to OFF, this menu item does not appear. 1. Use the AIRS or (SHIFT)T buttons to display the BP EXPRD menu item. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE tESt SEL CONFIRM 2. Use the AIRS or (SHIFT)T button to display the desired setting along the bottom of the screen. 3. Press and release the POWER ENTER button to save the setting and return to the main menu.
Turning the ID Display Function On or Off With ID DISP set to ON, the User ID Screen and Station ID Screens display during start up and in Display Mode. The ID’s can be updated in Display Mode. With ID DISP set to OFF (factory setting), the User ID Screen and Station ID Screens do not display during start up or in Display Mode. 1. Use the AIRS or (SHIFT)T buttons to display the ID DISP menu item. Press and release the POWER ENTER button. The screen will indicate the current setting.
return to the main menu. Updating the Autozero Function With AUTO.ZERO turned ON, the GX-2012 will automatically perform a fresh air adjust when it is turned on. With the AUTO.ZERO function turned OFF (factory setting), this does not occur. WARNING: If you turn on the autozero function, you must ensure that the unit is in a fresh air environment when it is turned on. 1. Use the AIRS or (SHIFT)T buttons to display the AUTO.ZERO menu item. Press and release the POWER ENTER button.
Updating the Leak Check/Bar Hole Mode Setting With L./B. MODE turned OFF (factory setting), the GX-2012 will automatically enter Normal Mode when it is turned on. With L./B. MODE set to bH, you will be prompted to choose between Normal Mode and Bar Hole Mode when the GX-2012 is turned on. With L./B. MODE set to LC, you will be prompted to choose between Normal Mode and Leak Check Mode when the GX-2012 is turned on. With L./B.
Updating the Bar Hole Sampling Time The Bar Hole Sampling Time is the amount of time that the GX-2012 samples a bar hole when being used in Bar Hole Mode. The 3 selections are 30, 45, and 60 seconds. The factory setting is 30 seconds. 1. Use the AIRS or (SHIFT)T buttons to display the B.H. TIME menu item. MAINTENANCE B.H. TIME 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE 30 B.H. TIME 3.
1. Use the AIRS or (SHIFT)T buttons to display the PORTUGAL menu item. MAINTENANCE PORTUGAL 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE OFF PORTUGAL 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu.
1. Use the AIRS or (SHIFT)T buttons to display the CO DISP menu item. MAINTENANCE CO DISP 2. Press and release the POWER ENTER button. The screen will indicate the current setting. MAINTENANCE OFF CO DISP 3. Use the AIRS or (SHIFT)T button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu. ROM/SUM The ROM/SUM screen shows the firmware version that is loaded in the instrument and the firmware checksum. 1.
Turning the Password Function On or Off With PASSWORD set to ON, the GX-2012 prompts you for a password when you enter Calibration Mode. With PASSWORD set to OFF (factory setting), no password is required to enter Calibration Mode. NOTE: A password is always required to enter Maintenance Mode even if PASSWORD is turned OFF. You may change the factory set password by turning PASSWORD ON and entering a new password when prompted for it. 1. Use the AIRS or (SHIFT)T buttons to display the PASSWORD menu item.
password is saved and you return to the main menu. Performing a Low Flow Setpoint Adjustment If your instrument repeatedly goes into low flow alarm and you have tried all of the recommendations in the Troubleshooting section, you may need to perform a low flow setpoint adjustment. 1. Use the AIRS or (SHIFT)T buttons to display the FLOW ADJ menu item. Press and release the POWER ENTER button. The pump will turn off and the screen will display values that reflect the pump’s current draw.
Chapter 7: GX-2012 Maintenance Overview This chapter describes troubleshooting procedures for the GX-2012. It also includes procedures for recharging the battery pack (rechargeable version), replacing the alkaline batteries (alkaline version), and replacing various consumable parts. WARNING: RKI Instruments, Inc. recommends that service, calibration, and repair of RKI instruments be performed by personnel properly trained for this work.
Table 8: Troubleshooting the GX-2012 Symptoms Probable Causes Recommended Action • Display indicates “FAIL SYSTEM” during startup along with an error code. • A circuit fault has occurred on one of the PCB’s. 1. If the error code is 031, indicating a FLASH memory failure, press and release the RESET SILENCE button to continue to measuring mode keeping in mind that there will be no datalogging function. 2. If the error code is anything else, the instrument cannot be used. 3. Contact RKI Instruments, Inc.
Table 8: Troubleshooting the GX-2012 Probable Causes Recommended Action • The unit indicates flow failure and does not recover when RESET SILENCE is pressed and released. • The cotton filter in the probe or filter holder is dirty and clogged. • The sample hose has a kink or obstruction. • The hydrophobic filter disks or wire mesh disk are dirty and clogged. • The pump is malfunctioning. 1. Change the cotton filter in the probe or filter holder. 2.
Replacing or Recharging the Batteries WARNING: To prevent ignition of a hazardous atmosphere, batteries must only be changed in an area known to be nonhazardous. Replace the batteries when the battery icon indicates that the unit is in low battery warning. When in low battery warning, the lowest battery level indication bar is displayed in the battery icon on the LCD, and it will be flashing.
Replacing the Lithium Ion Battery Pack NOTE: Use Procell PC 1500 alkaline batteries, Duracell MN 1500 alkaline batteries, or RKI Instruments lithium ion battery pack 49-1615RK to maintain the CSA classification of the GX-2012. Use of other batteries will void the CSA classification and may void the warranty. 1. Turn off the GX-2012. WARNING: Do not remove the battery pack while the GX-2012 is on. 2. Push the latch on the bottom of the GX-2012 toward the front of the instrument to release the battery pack.
Recharging the Lithium Ion Battery Pack in the Instrument CAUTION: To be used only with lithium ion battery pack p/n 49-1615RK. Charge only with RKI charger model BC-2009, p/n 49-2180RK, or RKI charger model BC-2009DC, p/n 49-2181RK. Use of other rechargeable batteries or chargers or charging of other rechargeable batteries in the GX-2012 will void the warranty. 1. Make sure the GX-2012 is off. 2. Confirm that the adapter’s DC output cord is plugged into the charger. 3.
If using a DC powered charging station, plug the 12 VDC vehicle plug adapter into a vehicle’s 12 VDC power socket. Power Supply Jack DC Adapter To Vehicle 12 VDC Power Socket Charge LED DC Powered Charging Station Figure 21: Connecting the Charging Station’s DC Adapter The construction of the charging stations allows them to be chained together but a separate adapter must be used for each charging station. One adapter will not operate more than one charging station. 4.
Red Charging LED Figure 22: Putting the GX-2012 into the Charging Station 5. When a full charge has been reached, approximately 4 hours, the red LED on the charging station will turn off. Remove the GX-2012 from the charging station and unplug the charging station’s power cord from the AC outlet. Recharging the Lithium Ion Battery Pack Out of the Instrument The lithium ion battery pack may be charged using the charging station while it is out of the GX-2012.
3. If using an AC powered charging station, plug the AC adapter into an electrical outlet.
If using a DC powered charging station, plug the 12 VDC vehicle plug adapter into a vehicle’s 12 VDC power socket. Power Supply Jack DC Adapter To Vehicle 12 VDC Power Socket Charge LED DC Powered Charging Station Figure 24: Connecting the Charging Station’s DC Adapter The construction of the charging stations allows them to be chained together but a separate adapter must be used for each charging station. One adapter will not operate more than one charging station.
4. Insert the battery pack into the charging station as shown in Figure 25 below so that the metal contacts on the back of the battery pack come into contact with the metal contacts in the charging station. When proper contact has been made, the red LED on the charging station will turn on. Battery Pack CHARGE GX-2012 OFF POWER BUMP CAL. SDM-2012 EDIT ENTER COPY 1SEC ON 3SEC OFF Figure 25: Putting the Battery Pack into the Charging Station 5.
6. To replace the CO filter, pull the old one out of its recess in the sensor gasket if it did not already come out and replace it with a new one. You do not have to remove the sensor gasket to do this. The CO filter sits in a recess on top of it. LEL Filter Sensor Gasket CO Filter Figure 26: Replacing the LEL and CO Filters 7. Insert the flow chamber back into the instrument. 8. Tighten the top screw of the flow chamber completely. 9.
flow chamber. 4. Grab the exhaust tube and pull it gently away from the unit to slide the flow chamber out of the unit. 5. Gently pull on the knob of the sensor gasket to remove it. Be sure not to lose any of the filters that are in it. The sensors will be exposed. 6. Remove the sensor from its socket. 7. Carefully insert the replacement sensor in the correct socket.
8. If your instrument has a factory installed dummy sensor, ensure that it is still installed correctly. Make sure that the flat side is up and the hollow side is down. 9. Place the sensor gasket and filters back into the chamber ensuring that it seals with the sensors and the edge of the chamber. 10. Place the flow chamber in position over the sensor area and press it into the case until it is flush with the back of the case. 11. Tighten the top screw of the flow chamber completely. 12.
5. The hydrophobic disk filters and wire mesh disk are located in the case and are retained by a rubber gasket. Pull out the rubber gasket with needle nose pliers. Rubber Gasket Hydrophobic Disk Filter Cotton Dust Filter Filter Holder Wire Mesh Disk Installation Stub Figure 28: Changing the Filters & Wire Mesh Disk 6. Remove the old hydrophobic filters and/or wire mesh disk from the gasket. A hydrophobic filter is located on either side of the wire mesh disk. 7.
Parts List Table 7 lists part numbers for the GX-2012’s replacement parts and accessories.
Table 9: Parts List (cont.
Table 9: Parts List (cont.
Appendix A: Calibrating and Bump Testing with a Sample Bag Overview The GX-2012 can be calibrated and bump tested with a gas bag calibration kit instead of a demand flow regulator kit. Appendix A describes how to use a sample bag calibration kit to calibrate and bump test the GX-2012. A parts list at the end of this appendix lists spare parts for the calibration kit.
To calibrate or bump test the GX-2012, you will need: • Known calibrating samples of the gases being detected. The combustible and toxic gas samples should have concentrations in approximately the middle of the range of detection. An oxygen-free source, such as 100% nitrogen is recommended for setting the oxygen zero when using single calibration. WARNING: When using auto calibration, the multi-gas cylinder must have an oxygen concentration in the range of 10% - 18% oxygen.
4. Continue to hold the AIRS button until the display prompts you to release it. The GX-2012 will count down from 8 as it sets the fresh air reading for all channels. If the combustible channel is set as %LEL only or vol% only, there is no countdown period. The fresh air reading is set immediately. 5. Slide the tubing clamp onto the tubing and connect the tubing onto the sample bag’s inlet. Leave the clamp unclamped for now. 6.
Calibrating the GX-2012 From Measuring Mode, enter Calibration Mode by pressing and holding the (SHIFT)T button, then pressing the DISPLAY(ADJ) button and releasing both. If the unit prompts you for the password, enter it by using the AIRS and (SHIFT)T buttons to select each password number and then pressing and releasing POWER ENTER to confirm it and move on to the next number. To go back a number, press and release the RESET SILENCE button.
The GX-2012’s calibration menu includes two methods of calibration: auto calibration and single calibration. • Auto Calibration: This method allows you to calibrate the combustible gas (%LEL sensor only), OXY, H2S, and CO sensors simultaneously. It is designed for use with the RKI 4-gas calibration cylinder and is the quickest and easiest method to calibrate the GX-2012. If installed, you may also calibrate the %volume sensor separately from the standard four.
3. Use the AIRS or (SHIFT)T button to alternate between the 4-gas and the % volume combustible gas calibration values screens. MAINTENANCE 50 O2 12.0 CO 50 H2S 25.0 AUTO CAL CH4 %LEL % ppm ppm MAINTENANCE CH4 100 vol% AUTO CAL 4. The gas concentrations displayed in the calibration values screen must match the gas concentrations listed on the calibration cylinders. If all concentrations match, go to step 12. If one or more concentrations do not match, continue with step 5. 5.
sensors. 11. After the last calibration gas value is set, use the AIRS button to scroll to ESCAPE and press POWER ENTER to return to the calibration gas values screens. NOTE: The RKI Four Gas Cylinder typically contains 12% O2 by volume. Be sure to set the “OXY” reading to agree with the concentration listed on the cylinder’s label, not zero. 12. Use the AIRS and (SHIFT)T button to select which sensor(s) you want to calibrate, the standard 4 sensors or the % volume combustible gas sensor.
If any of the sensors cannot calibrate to the proper value, FAIL displays along the bottom of the screen and the GX-2012 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H2S channels failed calibration. The other sensors calibrated normally. MAINTENANCE O2 % H2 S ppm FAIL The buzzer and alarm lights activate. Press and release the RESET SILENCE button after the buzzer and lights stop to reset the alarm and return to the calibration menu. Attempt to calibrate again.
combustible gas channel, your calibration cylinder should have a combustible gas concentration between 10% LEL and 50% LEL. For the oxygen channel, RKI Instruments, Inc. recommends using 100% nitrogen to perform the adjustment but any concentration between 0% oxygen (100% nitrogen) and 17% oxygen can be used to make the adjustment. NOTE: If your combustible gas channel is calibrated to a gas other than methane, use an appropriate gas cylinder to perform the calibration.
3. Use the AIRS or (SHIFT)T button to display the sensor you want to calibrate (in this example the combustible gas % LEL sensor). If you have a 5 sensor unit, the %vol sensor will be one of the choices. It is shown below. MAINTENANCE CH4 --- vol% ONE CAL 4. Press and release the POWER ENTER button. The single calibration screen displays for the sensor you selected. The gas reading flashes. MAINTENANCE CH4 0 %LEL ONE CAL 5. Connect the tubing from the filled gas bag to the rigid tube on the probe.
8. Disconnect the tubing from the GX-2012’s probe. 9. Repeat steps 3 through 8 for any other sensors you want to calibrate. Make sure you use an appropriate calibration cylinder for each sensor. CAUTION: When calibrating the oxygen channel, verify the concentration of oxygen listed on the cylinder’s label. For oxygen-free samples (100% nitrogen for example), set the oxygen zero setting to 0.0%. 10. After the last channel is calibrated, disconnect the calibration tubing from the probe. 11.
From Measuring Mode, enter Calibration Mode by pressing and holding the (SHIFT)T button, then pressing the DISPLAY(ADJ) button and releasing both. If the unit prompts you for the password, enter it by using the AIRS and (SHIFT)T buttons to select each password number and then pressing and releasing POWER ENTER to confirm it and move on to the next number. To go back a number, press and release the RESET SILENCE button.
gas flow, clamp down the hose clamp and remove the regulator or dispensing valve from the cylinder. 6. Disconnect the tubing from the regulator or dispensing valve. 7. Install the hose and probe to the GX-2012. 8. Use the AIRS or (SHIFT)T buttons to display the BUMP menu item. MAINTENANCE BUMP 9. Press and release the POWER ENTER button to display the bump test gas values. MAINTENANCE 50 O2 12.0 CO 50 H2S 25.0 BUMP 30 CH4 %LEL % ppm ppm 10.
13. Open the hose clamp and connect the tubing from the filled gas bag to the rigid tube on the probe and quickly press and release the POWER ENTER button. The unit will begin counting down from 30. 14. When AUTO CAL in the BUMP--SET menu item in Maintenance Mode is set to OFF: • The instrument will indicate which channels passed or failed the bump test with a P (pass) or an F (fail) to the right of the gas.
15. When AUTO CAL in the BUMP--SET menu item in Maintenance Mode is set to ON: If all channels pass the bump test, • The following screen appears: MAINTENANCE CH4 O2 CO H2 S F P F P %LEL % ppm ppm BUMP • To view the bump test gas readings press the AIRS or (SHIFT)T button. You can scroll between the bump test results and the bump test gas readings with the AIRS or (SHIFT)T buttons. MAINTENANCE CH4 O2 CO H2S 45 12.0 47 23.
calibration initiated because of a failed bump test is the difference between the bump test gas time and the calibration time defined in the BUMP--SET menu item in Maintenance Mode. MAINTENANCE CH4 O2 CO H2S CAL • 1 20.9 37 10.0 60 %LEL % ppm ppm At the end of the calibration, the instrument displays the results from both the bump test and the calibration. Use the AIRS or (SHIFT)T buttons to scroll between the calibration/bump test results, the bump test gas readings, and the calibration gas readings.
ENTER at any time. If any channel failed the calibration, the buzzer will sound a double pulsing tone until you press and release the POWER ENTER button. MAINTENANCE BUMP • Disconnect the tubing from the probe. 16. With the BUMP menu option displayed, press the (SHIFT)T button until the NORMAL menu option is displayed. 17. Press and release the POWER ENTER button to return to Measuring Mode.
