Model GX-2003 Operator’s Manual Part Number: 71-0089RK Revision: F Released: 2/2/11 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 Model GX-2003 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. Any parts found defective within their warranty period will be repaired or replaced, at our option, free of charge.
Table of Contents Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . About the GX-2003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measuring Mode, Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . Monitoring an Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Combustible Gas Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measuring Mode, Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Resetting and Silencing Alarms . . . . . . . . . . .
Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Locating a Leak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turning the Buzzer On and Off in Leak Check Mode. . . . . . . . . . . . Turning Off the GX-2003, Leak Check Mode . . . . . . . . . . . . . . . . . . 50 50 50 51 Chapter 6: Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Overview . . . . . . . . . . . . . . . . . . . .
Replacing the HC 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-2003. This chapter also describes the GX-2003 Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the GX-2003. About the GX-2003 Using an advanced detection system consisting of up to five gas sensors, the GX-2003 sample draw gas monitor detects the presence of combustible gas, oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S) simultaneously.
• Peak hold and average readouts (when used in Normal Mode) • Built-in time function • RF shielded high impact plastic case • CSA classified for Class I, Division I, Groups A, B, C, and D hazardous atmospheres WARNING: The Model GX-2003 detects oxygen deficiency, elevated levels of oxygen, combustible gases, carbon monoxide, and hydrogen sulfide, all of which can be dangerous or life threatening.
Specifications Table 1: GX-2003 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 Case C US 186718 CSA classified, “C/US”, as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D. Temperature Code T3C. • Three AA size alkaline batteries standard • Ni-MH Battery Pack (3.
Chapter 2: Description Overview This chapter describes the GX-2003 instrument and accessories. Instrument Description The instrument includes the case, sensors, LCD, control buttons, printed circuit boards, alarm LED’s, infrared communication port, buzzers, vibrator, batteries, pump, flow chamber, and inlet filter holder.
LED Array (near & far side) IR Communitcations Port Battery Charging Contacts Battery Cover Release Knob Right Side View Bottom View Figure 2: Components of the GX-2003, Side & Bottom Case The Model GX-2003’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.
Sensors The GX-2003 uses up to five sensors to monitor combustible gas, oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S) simultaneously. The sensors are located inside the GX-2003 and are held in their sockets by the flow chamber. The sensors use different detection principles, as described below. Combustible Gas Sensors % LEL Sensor (NC-6264AT) The % LEL sensor detects combustible gas in the % LEL range. It uses a catalytic element for detection.
CO and H2S Sensors The CO and H2S sensors are electrochemical cells that consist of two precious metal electrodes in a dilute acid electrolyte. A gas permeable membrane covers the sensor face and allows gas to diffuse into the electrolyte. The gas reacts in the sensor and produces a current proportional to the concentration of the target gas. The current is amplified by the Model GX-2003’s circuitry, converted to a measurement of gas concentration, and displayed on the LCD.
Alarm LED Arrays Four red alarm LED (light emitting diode) arrays are visible through frosted plastic lenses in the case. One is on the front, one on the left side, one on the right side, and one on the top of the case. The alarm LED arrays alert you to gas, low battery, and failure alarms. Infrared Communications Port An infrared (IR) communications port is located on the lower right side of the GX-2003. The data transmitted through the port is in standard IrDA protocol.
its optional battery charging station or by placing the battery pack in the charging station. NOTE: Use of batteries or battery chargers not specified by RKI Instruments, Inc. will void the CSA classification and may void the warranty. See “Replacing or Recharging the Batteries” on page 70. WARNING: To prevent ignition of a hazardous atmosphere, batteries must only be changed or charged in an area known to be nonhazardous. Pump A diaphragm pump inside the GX-2003 draws the sample to the sensors.
CO Filter The CO filter is located in the flow chamber directly over the CO sensor. It is a red and black plastic ring which contains two charcoal filter disks, two H2S removal filter disks, and a thin white plastic sheet with a hole in the middle on each side to support the filter disks. The charcoal filter disks are black, have a woven texture, and are impregnated with an H2S absorbing material.
Standard Accessories The standard accessories include the tapered rubber nozzle, protective rubber boot, 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-2003 as standard. It can be installed on the inlet fitting by pushing the larger end over it.
Sample Hose & 10 Inch Probe A 10 foot sample hose and a 10 inch probe are included as standard with the GX-2003. When desired, the rubber nozzle may be removed and the sample hose and 10 inch probe may be connected to the inlet fitting. Sample hose lengths are available from 10 feet to 40 feet (see “Parts List” on page 78). The quick connect end of the sample hose connects to the inlet fitting of the GX-2003 and the probe screws onto the end of the hose with the threaded fitting.
Chapter 3: Using the GX-2003 in Normal Mode Overview This chapter explains how to operate the GX-2003 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-2003 is ordered, it is shipped with Bar Hole Mode and Leak Check Mode disabled so that the instrument only runs in Normal Mode when turned on.
4. If LUNCH BREAK is turned on (see page 55), the Resume Datalog Screen displays. RESUME DATALOG ? 4 YES: AIR NO: DISPLAY 21:09 • Press and release the ▲AIR button to continue accumulating time-weighted average (TWA), PEAK readings, and time in operation from the last time the GX-2003 was used. The shortterm exposure limit [STEL] reading is reset each time the GX2003 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 CAL. EXPIRED ACTION is set to CANNOT USE, then the following screen displays. CAL. DATE PAST NOT OPERATED The GX-2003 cannot be used until a calibration has been performed either by selecting AUTO CALIBRATION or SINGLE CALIBRATION in the Setup Mode menu. See “Calibrating Using Auto Calibration” on page 61 or “Calibrating Using Single Calibration” on page 63 for calibration instructions.
soon as possible. 9. The GX-2003 is now operating in Normal Mode and monitoring for gas in Measuring Mode. The Normal Operation Screen appears. CH4 OXY H2S CO 0%LEL 20.9VOL% 0.0ppm 0ppm 21:09 N The concentrations of the target gases are displayed along with the time and battery charge level. If an “N” appears next to the battery icon as illustrated above, the GX-2003 is being powered by Ni-MH battery pack. If no “N” appears, then alkaline batteries are powering the unit.
3. Press and briefly hold down the POWER/ENTER button. The Mode Select Screen displays. >NORMAL MODE BAR HOLE MODE LEAK CHECK MODE 21:09 NOTE: If a “N” appears to the right of the battery icon, this indicates that a Ni-MH battery pack is being used instead of alkaline batteries. 4. The cursor will begin in front of Normal Mode and Normal Mode will flash dark and light indicating it is selected. 5.
Turning Off the GX-2003, Normal Mode 1. Press and hold the POWER ENTER button. 2. The buzzer will sound and the LCD back light will flash for about five seconds. 3. Release the button when GOODBYE appears on the display. When GOODBYE disappears and the backlight turns off, the unit is off. Measuring Mode, Normal Operation The GX-2003 has three operating modes within Normal Mode: Measuring Mode, Display Mode, and Calibration Mode.
Instruments, Inc. for longer sample hose lengths. 4. If a gas alarm occurs, take appropriate action. See “Responding to Alarms” on page 24. Combustible Gas Detection The GX-2003 can support two combustible gas sensors, a TC (thermal conductivity) sensor for detection in the % volume range, and a catalytic sensor for detection in the % LEL range. Either or both sensors maybe installed in your unit.
The table below lists the conversion factors for several hydrocarbon gases for the % LEL combustible sensor if it is calibrated to methane. Conversion factors are not available for the % volume TC sensor. To use this table, multiply the display reading on the CH4 channel by the factor in the appropriate row to obtain the actual gas concentration. For example, if you are detecting pentane and the display reads 10% LEL on the CH4 channel, you actually have 10% LEL x 1.35 = 13.5% LEL pentane present.
Alarm Indications CAUTION: If the combustible channel is set for %volume only, then there are no gas alarms for any detection channel. See “HC Range Screen” on page 26. The GX-2003 will sound an alarm, the unit will vibrate, and the LED arrays will flash when one of the target gas concentrations rises above the Alarm 1 level, or in the case of oxygen, falls below the Low Alarm setting for that gas.
Table 4: Alarm Types and Indications Alarm Type Visual Indications Other Indications Over Range* • Gas reading indicates full scale. • Alarm LED arrays flash. • Back light turns on.
the alarm level when the button was pressed, the LEDs continue to flash, and the GX-2003 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-2003 alarm indications on the display turn off.
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-2003 is not operational as a gas monitoring device during a dead battery alarm.
• display time in operation • display TWA and STEL readings (H2S and CO only) • display the date, time, and battery charge • clear the data logger • display remaining log time To enter Display Mode, press and release the DISPLAY (ADJ) button while in Measuring Mode. To scroll from one screen to the next press and release the DISPLAY (ADJ) button. NOTE: Each screen displays for 20 seconds.
ID Screen This screen displays only if USER/STATION ID in the Setup Mode menu is set to ON (see “Turning the User/Station ID Function On or Off” on page 61). Each ID contains 10 characters. Uppercase letters, numbers, asterisks (*), dashes (-), and a blank space are available characters. Use this screen to identify the user, location, or other information. The user ID and station ID provide a way to identify the user and location of exposure during a data logging session.
Peak Screen The peak screen displays the highest (lowest for O2) concentrations detected since the GX-2003 was turned on. Peak readings are stored in the GX-2003’s memory until a higher level is detected, the peak reading is reset, or the GX-2003 is turned off. The lunch break feature enables the GX-2003 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-2003, Normal Mode Only” on page 14.
The STEL reading is the average reading during the last 15 minutes. H2S CO TWA STEL 0.0 0.0ppm 0 0ppm 21:09 Date/Time/Battery Charge Screen The date/time/battery charge screen displays the current date, time, and battery charge level. If the battery icon is fully filled in black, then the batteries are fully charged. Sept/23/’03 20:34 BATTERY: Clear Data Logger Screens CAUTION: Once you clear the data logger, you cannot retrieve any data previously stored in the data logger.
2. Press and release the ▲AIR button to confirm that you want to clear the data logger. The GX-2003 displays CLEARING THE DATA LOGGER PLEASE WAIT . . . . for several seconds, then displays CLEARED OK. The data logger is cleared and the remaining log time value is reset. Remaining Log Time Screen The remaining log time screen displays the time remaining until the data logger memory is full.
Data Logging NOTE: The GX-2003 only logs data while in Normal Mode. If the GX2003 is used in Bar Hole Mode or Leak Check Mode, no downloadable data will be logged while it is in either of these two modes. NOTE: The GX-2003 does not log data during the first minute of operation after being turned on. The GX-2003 features the ability to log data to its internal memory and download it to a computer via the infrared communications port on the lower right side.
Calibration Mode Calibration mode allows you to calibrate the GX-2003’s sensor response. It also includes a menu item which allows you to adjust the LCD contrast. 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.
WARNING: 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-2003 with the regulator or valve or damage to the pump will result. See “Appendix A: Calibrating with a Sample Bag” on page 80 for instructions to properly use a gas bag kit.
NOTE: The following screens illustrate a four-gas GX-2003 with both a % LEL and a % volume combustible sensor as examples only. Your GX-2003 may display slightly different screens. >AUTO CALIBRATION SINGLE CALIBRATION CONTRAST NORMAL OPERATION 21:09 The GX-2003’s calibration menu includes two methods of calibration: auto calibration and single calibration. • Auto Calibration: This method allows you to calibrate the CH4 (%LEL sensor only), OXY, H2S, and CO sensors simultaneously.
3. If necessary, use the ▲AIR and (SHIFT)▼ buttons to set the correct combustible gas value. 4. Press and release the POWER ENTER button to enter the new setting. The OXY calibration value begins to flash. 5. Repeat steps 3 and 4 to set the correct values for the remaining channels. After the last channel is set, you return to the calibration values screen and the values are no longer flashing. NOTE: The RKI Four Gas Cylinder typically contains 12% O2 by volume.
9. Disconnect the tubing from the probe. 10. Unscrew the demand flow regulator from the calibration cylinder. 11. Use the (SHIFT)▼ button to place the cursor next to the NORMAL OPERATION menu option, then press and release the POWER ENTER button to return to Measuring Mode. Calibrating with the Single Calibration method This section describes calibration using the Single Calibration method. To calibrate using the Auto Calibration method, see “Calibrating with the Auto Calibration Method” on page 34.
4. Press and release the POWER/ENTER button. The single calibration screen displays for the sensor you selected. The gas reading flashes. CH4 CALIBRATION 0% LEL APPLY GAS ADJ/ENTER 21:09 5. Connect the tubing from the demand flow regulator to the rigid tube on the probe. Allow the calibration gas to flow for one minute. 6. If necessary, use the ▲AIR and (SHIFT)▼ buttons to adjust the reading to match the concentration listed on the calibration cylinder. 7.
Adjusting the LCD Contrast The contrast setting controls the LCD contrast. Select the setting so the characters on the display are easy to see. It can be set from 0 to 15. The higher the setting, the darker the characters and LCD background. 1. From Measuring Mode, enter Calibration Mode by pressing and holding the (SHIFT)▼ button, then pressing the DISPLAY(ADJ) button and releasing both.
Chapter 4: Using the GX-2003 in Bar Hole Mode Overview This chapter explains how to operate the GX-2003 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-2003 is in Bar Hole Mode, only the combustible and oxygen sensors are displayed.
1. Connect the sample hose to the GX-2003’s quick connect inlet fitting. 2. Screw the bar hole probe onto the sample hose’s threaded fitting. 3. Press and briefly hold down the POWER/ENTER button. The Mode Select Screen displays. >NORMAL MODE BAR HOLE MODE LEAK CHECK MODE 21:09 N NOTE: If a “N” appears to the right of the battery icon, this indicates that a Ni-MH battery pack is being used instead of alkaline batteries. 4.
The alarm LED’s and buzzer will pulse several times and the vibrator will activate for a second. After this, press the RESET SILENCE button until you hear a beep to continue. • If the unit is due for calibration and CAL. EXPIRED ACTION is set to CANNOT USE, then the following screen displays. CAL. DATE PAST NOT OPERATED The GX-2003 cannot be used until a calibration has been performed by selecting AUTO CALIBRATION in Setup Mode Menu. See “Calibration Mode” on page 32 for calibration instructions.
RESET SILENCE button to acknowledge the failure and return to the Mode Select Screen. Replace the failed sensor as soon as possible. If the oxygen sensor fails, press and release the RESET SILENCE button to acknowledge the failure and continue to Bar Hole Mode. The gas reading for the oxygen sensor will be replaced by “XXX”. Replace the failed sensor as soon as possible.
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. 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. Bar Hole Mode also allows the you to initiate an air purge cycle to purge gas from the GX-2003 after a sample is taken.
5. At the end of the sample period, the pump will shut off and the audible alarm will sound, then the peak methane reading and the minimum oxygen reading for the sample period will be displayed. PCH4 0%LEL EOXY 20.9VOL% A ENTER:MEASURE K DISP :PURGE B.H.MODE 21:09 6. If a high concentration of methane is encountered, a fresh air purge can be performed to purge the hose, probe and GX-2003 of gas before the next bar hole test.
Turning Off the GX-2003, 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. The buzzer will sound and the LCD back light will flash for about five seconds. 3. Release the button when GOODBYE appears on the display. When GOODBYE disappears and the backlight turns off, the unit is off.
Chapter 5: Using the GX-2003 in Leak Check Mode Overview This chapter explains how to operate the GX-2003 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 GX-2003 is in Leak Check Mode, only the LEL/ppm combustible sensor is active.
1. Connect the tapered rubber nozzle or the sample hose to the GX2003’s quick connect inlet fitting. 2. If a sample hose is used, screw the probe onto the sample hose’s threaded fitting. NOTE: If a probe is used when using the GX-2003 in Leak Check Mode, use the standard probe, not the bar hole probe. 3. Press and briefly hold down the POWER/ENTER button. The Mode Select Screen displays.
• If the unit is due for calibration and CAL. EXPIRED ACTION is set to CONFIRM TO USE, then the following screen displays. CAL. DATE PAST CAL. IS REQUIRED The alarm LED’s and buzzer will pulse several times and the vibrator will activate for a second. After this, press the RESET SILENCE button until you hear a beep to continue. • If the unit is due for calibration and CAL. EXPIRED ACTION is set to CANNOT USE, then the following screen displays. CAL.
below, the LEL/ppm sensor has failed. FAIL SENSOR < < > < > < 21:09 > > If the LEL/ppm sensor fails, it is not possible to enter Leak Check Mode. Press and release the RESET SILENCE button to acknowledge the failure and return to the Mode Select Screen. Replace the failed sensor as soon as possible. If the % volume combustible, oxygen, CO, or H2S sensor is installed and fails, press and release the RESET SILENCE button to acknowledge the failure and continue to Leak Check Mode.
Leak Testing In Leak Check Mode, the GX-2003 only displays combustible gas readings, and the readings are displayed in 100 ppm increments up 5,000 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. The blinking/pulsing rate increases as the gas reading increases. If desired the buzzer can be turned off in Leak Check Mode.
To turn the buzzer off or on while in Leak Check Mode: 1. Press and hold the DISPLAY(ADJ) button for 3 seconds. 2. Release the button when the buzzer setting in the lower left corner changes. Turning Off the GX-2003, Leak Check Mode 1. Press and hold the POWER ENTER button. 2. The buzzer will sound and the LCD back light will flash for about five seconds. 3. Release the button when GOODBYE appears on the display. When GOODBYE disappears and the backlight turns off, the unit is off.
Chapter 6: Setup Mode Overview This chapter describes the GX-2003 in Setup Mode.
Tips for Using Setup Mode • When in the main menu, the cursor (>) will flash in front of a menu item indicating that the item is selected. • Use (SHIFT)▼ to scroll down through the main menu and submenus, and to lower values or change the setting in a specific option. • Use ▲AIR to scroll up through the main menu and submenus, and to raise values or change the setting in a specific option. • Use the POWER ENTER button to enter a selected menu item, and to enter and save settings during programming.
Updating the Alarm Point Settings This menu item allows you to update one or more alarm points (the reading at which the GX-2003 recognizes the alarm condition). 1. From the main menu, place the cursor next to the ALARM POINTS menu item. Press and release the POWER ENTER button. All detection channels are displayed. >CH4 OXY H2S CO 21:09 N 2. Move the cursor next to the channel of the alarm point you want to update. Press and release the POWER ENTER button.
4. Press and release the POWER ENTER button to save the new alarm point and move to the next set alarm screen. 5. Repeat step 3 and 4 to update additional alarms while in the desired set alarm screen. 6. Press and release the POWER/ENTER button repeatedly until you return to the screen that displays all the detection channels. 7. Repeat steps 2 through 6 until all desired alarms are updated. 8.
Updating the Alarm Latching Setting With ALARM LATCHING set to ON (factory setting), the GX-2003 remains in alarm condition until the alarm condition passes and the RESET SILENCE is pressed. With Alarm Latching set to OFF, the GX-2003 automatically resets an alarm when the alarm condition passes. 1. From the main menu, place the cursor next to the ALARM LATCHING menu item. Press and release the POWER ENTER button. ALARM LATCHING ON 21:09 2. Use the ▲AIR or (SHIFT) ▼ button to display the desired setting.
Updating the Confirmation Beep Setting With CONFIRMATION BEEP set to ON, the GX-2003 beeps once every 15 minutes to verify that it is operating. With CONFIRMATION BEEP set to OFF (factory setting), the GX2003 does not sound a confirmation beep. 1. From the main menu, place the cursor next to the CONFIRMATION BEEP menu item. Press and release the POWER ENTER button. CONFIRMATION BEEP OFF 21:09 2. Use the ▲AIR or (SHIFT)▼ button to display the desired setting. 3.
1. From the main menu, place the cursor next to the DATALOG OVERWRITE menu item. Press and release the POWER ENTER button. DATA LOGGER OVERWRITE ON 21:09 2. Use the ▲AIR or (SHIFT)▼ 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 Date and Time Settings 1. From the main menu, place the cursor next to the DATE/TIME menu item. Press and release the POWER ENTER button.
2. Use the ▲AIR or (SHIFT)▼ button to display the desired setting. Tip: Press and hold the ▲AIR or (SHIFT)▼ button to rapidly scroll through the settings. 3. Press and release the POWER ENTER button to save the setting and return to the main menu. Updating the Calibration Time Remaining Setting With CAL. TIME REMAINING set to ON (factory setting), the GX2003 will give an indication at start up if it is due for calibration. The type of indication will depend on the CAL. EXPIRED ACTION setting (see below).
1. From the main menu, place the cursor next to the CAL. EXPIRED ACTION menu item. Press and release the POWER ENTER button. CALIBRATION EXPIRED ACTION CONFIRM TO USE 21:09 2. Use the ▲AIR or (SHIFT) ▼ 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 LCD Contrast Setting NOTE: The LCD contrast setting can also be adjusted in Calibration Mode. See “Adjusting the LCD Contrast” on page 38.
SET SERIAL NO. 378010028 21:09 2. Use the ▲AIR or (SHIFT) ▼ button to display the desired character, then press and release the POWER/ENTER button to enter the character. The next character flashes. 3. Repeat step 2 to enter the remaining characters. The serial number is saved and the main menu displays after you enter the last character. Turning the User/Station ID Function On or Off With USER/STATION ID set to ON, the ID Screen displays during start up and in Display Mode.
3. Install the hose and probe to the GX-2003. 4. From the main menu, place the cursor next to the AUTO CALIBRATION menu item. Press and release the POWER ENTER button to display the calibration values screen. C CH4 A OXY L H2S . CO 50%LEL 12.0VOL% 25.0ppm 50ppm 21:09 The gas concentrations displayed in the calibration values screen must match the gas concentrations listed on the 4-gas calibration cylinder. If all concentrations match, go to step 9.
If all channels passed calibration, AUTO CALIBRATION PASS displays, then the calibration main Setup menu displays. If any of the sensors cannot calibrate to the proper value, FAIL PUSH AIR KEY displays and the GX-2003 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H2S channels failed calibration. The other sensors calibrated normally. FAIL PUSH AIR KEY < > < > < > 21:09 The buzzer, vibrator, and alarm lights activate.
NOTE: To display the CO sensor, use the (SHIFT)▼button to move the cursor to the bottom of the screen and then press it again to advance to the next screen. 5. Use the ▲AIR or (SHIFT)▼ button to place the cursor next to the sensor you want to calibrate (in this example the combustible gas %LEL sensor). 6. Press and release the POWER/ENTER button. The single calibration screen displays for the sensor you selected. The gas reading flashes. CH4 CALIBRATION 0% LEL APPLY GAS ADJ/ENTER 21:09 7.
Updating the LCD Back Light Time Setting This setting indicates the length of time the LCD illuminates when you press any button. The minimum setting is 0 seconds; the maximum setting is 60 seconds. The factory setting is 30 seconds. 1. From the main menu, place the cursor next to the LCD BACK LIGHT TIME menu item. Press and release the POWER ENTER button. LCD BACK LIGHT TIME 30 SEC 21:09 2. Use the ▲AIR and (SHIFT)▼ buttons to display the desired setting. 3.
6. Repeat steps 4 and 5 to select the remaining characters. When you press and release the POWER ENTER button to enter the last number, the password is saved and you return to the main menu. Turning LB Mode Display On or Off With LB MODE DISPLAY set to ON, the Mode Select Screen appears when the unit is turned on. With LB MODE DISPLAY set to OFF, the Mode Select Screen does not appear when the unit is turned on and the unit goes into Normal Mode after the start up sequence.
Exiting Setup Mode 1. From the main menu, place the cursor in front of the START MEASUREMENT menu item. Press and release the POWER ENTER button. 2. The unit will begin its start up sequence.
Chapter 7: Maintenance Overview This chapter describes troubleshooting procedures for the GX-2003. It also includes procedures for recharging the battery pack 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. Replacing sensors and other parts with original equipment does not affect the intrinsic safety of the instrument.
Table 6: Troubleshooting the GX-2003 Symptoms 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 or charged in an area known to be nonhazardous. Replace or charge the batteries when the battery icon indicates that the unit is in low battery warning. When in low battery warning, only half of one battery level indication bar is displayed in the battery icon on the LCD, and this icon will be flashing.
while pushing down the other end to install it into the compartment. Figure 6: Installing the Battery Pack 5. Reinstall the battery cover and turn the battery cover release knob clockwise to lock the cover in place. Recharging the Battery Pack in the Instrument CAUTION: To be used only with Ni-MH battery pack p/n 49-1606RK. Charge only with RKI charger model BC-2003, p/n 49-2160RK, or RKI charger model BC-2003DC, p/n 49-2161RK.
AIR DISPLAY (ADJ) RESET SILENCE (SHIFT) Red Charging LED Figure 7: Putting the GX-2003 into the Charging Station 4. When a full charge has been reached, approximately 90 minutes, the red LED on the charging station will turn off. Remove the GX2003 from the charging station and unplug the charging station’s power cord from the AC outlet. Recharging the Battery Pack Out of the Instrument The battery pack may be charged using the charging station while it is out of the GX-2003.
2. Insert the battery pack into the charging station as shown in Figure 8 below so that the metal contacts on the ends 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. Pull Up On This Tab To Remove Pack Polarity Indexing Marks Red Charging LED Side View Top View Figure 8: Putting the Battery Pack into the Charging Station 3.
HC Filter Retainer HC Filter CO Filter CO Filter Retainer Figure 9: Replacing the CO and HC Filters 5. Carefully screw the filter retainer with the filter back into the correct position in the flow chamber. Replacing a Sensor 1. Verify that the Model GX-2003 is off. 2. Unscrew and remove the three screws that secure the flow chamber to the back of the GX-2003. 3. Gently pull on the exhaust to remove the flow chamber from the case and expose the sensors. 4. Remove the sensor from its socket. 5.
Exhaust Flow Chamber O2 H2S HC VOL % Volume Combustible Sensor HC LEL % LEL Combustible Sensor Oxygen H2S Sensor Sensor CO CO Sensor Align Slots in H2S and CO Sensors With Tabs in Sockets Figure 10: Replacing a Sensor 75 • Replacing a Sensor GX-2003 Operator’s Manual
CAUTION: When replacing a sensor, verify that the sensor is properly aligned with its socket before inserting it into the socket. The CO and H2S sensors have alignment slots which match up with alignment tabs in the sockets. The combustible sensors each have two non-polarized contacts which must line up with the contacts in their socket. Forcing a sensor into its socket may damage the sensor or the socket. 6.
Rubber Gasket Hydrophobic Disk Filter Cotton Dust Filter Filter Holder Wire Mesh Disk Figure 11: 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. Install the new hydrophobic filters and/or wire mesh disk making sure a hydrophobic filter is located on each side of the wire mesh disk. 8. Reinstall the gasket with the parts into the case. 9.
Parts List Table 7 lists part numbers for the GX-2003’s replacement parts and accessories.
Table 7: Parts List (cont.
Appendix A: Calibrating with a Sample Bag Overview The GX-2003 can be calibrated 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 the GX-2003. A parts list at the end of this appendix lists spare parts for the calibration kit.
To calibrate the GX-2003, 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 oxygenfree 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. • A gas collection bag with hose clamp • A 0.
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. Connect the other end of the tubing to the regulator’s or dispensing valve’s hose barb fitting. 7. Fill the gas collection bag by screwing the fixed flow regulator onto the calibration cylinder or by screwing the dispensing valve onto the calibration cylinder and turning the knob counterclockwise. NOTE: If the regulator has no On/Off knob, then gas will begin to flow at 0.
The GX-2003’s calibration menu includes two methods of calibration: auto calibration and single calibration. • Auto Calibration: This method allows you to calibrate the CH4 (%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-2003. • Single Calibration: This method allows you to calibrate one sensor at a time.
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. 6. With the calibration values screen displayed, press the POWER/ ENTER button. CAL. along the left side of the LCD begins to flash and the current gas readings are displayed. C CH4 A OXY L H2S . CO 0%LEL 20.9VOL% 0.0ppm 0ppm 21:09 7. Connect the tubing from the gas bag to the rigid tube on the probe.
Calibrating with the Single Calibration Method This section describes calibration using the Single Calibration method. To calibrate using the Auto Calibration method, see “Calibrating with the Auto Calibration Method” above. CAUTION: The single calibration method does not have a “FAIL” notification. If a sensor cannot be set to agree with the calibration source, see the “Troubleshooting” section of the Operator’s Manual. 1.
6. If necessary, use the ▲AIR and (SHIFT)▼ buttons to adjust the reading to match the concentration listed on the calibration cylinder. 7. Press and release the POWER ENTER button to save the span value. The LCD will indicate that the calibration has ended, then the single calibration menu displays. 8. Disconnect the tubing from the GX-2003’s probe. 9. Repeat steps 3 through 8 for any other channels you want to calibrate. Make sure you use an appropriate calibration cylinder for each channel.
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