Model GD-K11D Operator’s Manual Part Number: 71-0029RK Edition: First Released: August 1997 RKI Instruments, Inc. • 1855 Whipple Rd.
Warranty RKI Instruments, Inc., warranties gas alarm equipment manufactured by RKI and sold by RKI to be free from defects in materials and workmanship for a period of one year from date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge. This warranty does not apply to items that are subject to deterioration or consumption in normal service, and which must be cleaned, repaired, or replaced routinely.
Table of Contents Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Measuring Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . .
iv Model GD-K11D Operator’s Manual
Overview The Model GD-K11D sample-draw transmitter is a single-point, fixed-instrument. It continuously monitors for the target gas and alerts you to increasing gas levels with visual alarms. Alarm contacts allow you to connect external alarms. The Model GD-K11D includes a trouble alarm that alerts you to failure in the flow system and detection circuit. The Model GD-K11D operates in two modes: measuring mode and maintenance mode.
Table 2 lists the gases that the Model GD-K11D is capable of detecting. Table 2 also lists the detection range, alarm point, and fail point for each target gas. NOTE: Your Model GD-K11D is calibrated to only one of the gases listed below. A label on the front of the instrument indicates the target gas of your Model GD-K11D. Table 2: Model GD-K11D Target Gases, Detection Ranges, and Alarm Points Target Gas 2 • Specifications Detection Range Alarm Point Ammonia (NH3) 0 to 75.0 ppm 25.
Description This section describes the components of the Model GD-K11D. The Model GD-K11D consists of the housing, electrical system, flow system, and detection system.
Electrical System The Model GD-K11D’s electrical system consists of the terminal strip, power switch, and fuses (see Figure 1.) Terminal strip The terminal strip allows you make external wiring connections to the Model GD-K11D. The nine-point terminal strip is divided into two rows. The upper (five-point) terminal strip is for connection to a recorder or a controlling device, which accepts a 4 to 20 mA signal. The lower (four-point) terminal strip is for connection to incoming power and external alarms.
Detection System The Model GD-K11D’s detection system consists of the sensor, lithium battery, amplifier, and display board (see Figure 1.) Sensor Through a series of electrical and chemical reactions, the sensor produces an electrical current that is proportional to the detection range of the target gas. Electrodes within the sensor housing are surrounded by liquid electrolyte. The electrical and chemical reactions are facilitated by the electrolyte. Battery The 3.
Status lights The display board includes five status lights. Table 3 lists each light and its function.
Adjustment potentiometers The display board includes two potentiometers, which extend from the bottom of the display board. Table 5 lists each potentiometer and its function. Table 5: Model GD-K11D Adjustment Potentiometers Potentiometer1 Function ZERO Adjusts the zero setting SPAN2 Adjusts the span (response) setting 1 The GAIN potentiometer is for factory-use only. It is for coarse span adjustments. 2 Only use the SPAN potentiometer if you cannot set the span setting with the ∆ and ∇ buttons.
Installation This section describes how to install the Model GD-K11D at the monitoring site. This section includes procedures to mount the Model GD-K11D, connect sample lines to the Model GD-K11D, and make power and other wiring connections to the Model GD-K11D. Mounting the Model GD-K11D CAUTION: The Model GD-K11D is suitable for installation in indoor areas where general purpose equipment is in use. 1. Select a mounting site that is representative of the monitoring environment.
2. Use two screws through the slot cutouts at the top of the housing to secure the housing to a vertical surface at the mounting site (see Figure 2.) 3. Use two screws through the mounting holes at the bottom of the housing to support the installation of the Model GD-K11D (see Figure 2.) Connecting the Sample Lines to the Model GD-K11D 1. Attach 4 x 6 mm PTFE teflon tubing to the gas in fitting. Place the opposite end of the tubing at the sampling area.
Connecting AC power 1. Loosen the thumbscrew at the top of the housing. 2. Rotate the housing cover toward the bottom of the housing to gain access to the terminal strip. 3. Verify that the Model GD-K11D’s power switch is in the OFF position. 4. Unscrew and remove the two screws that secure the terminal strip’s protective cover, then remove the protective cover. 5. Guide the AC power cord through an unused conduit fitting at the bottom of the housing. 6.
Start Up This section describes procedures to start up the Model GD-K11D and place the Model GD-K11D into normal operation. Introducing Incoming Power 1. Complete the installation procedures described earlier in this manual. 2. Verify that the power wiring is correct and secure (see the “Installation” section on page 8.) 3. Turn on or plug in the incoming power at the power source end, then place the Model GD-K11D’s power switch in the ON position. 4. Verify that the PW/TR (power) light is on. 5.
6. Press the MODE button. The ZERO light turns off, and 3. appears on the display screen. NOTE: The purpose of this procedure is to set the zero reading only. It is not necessary to set the span (response) reading at this time. 12 • Start Up 7. Press the MODE button for approximately 3 seconds to exit maintenance mode and return to the normal screen. 8. Rotate the housing cover up to its original position, then tighten the thumbscrew at the top of the housing to secure the cover to the housing.
Operation This section describes procedures to display the peak reading, and to adjust the alarm point, alarm delay, and alarm type. Displaying the Peak Reading The Model GD-K11D defines the peak reading as the highest reading above the alarm point since the last time the peak reading was reset. A reading must remain above the alarm point for a period longer than the alarm delay (default is 3 seconds) before the Model GD-K11D compares the gas reading to the current peak reading.
3. Adjust the INT switch to the “2” position. The current alarm point appears on the display screen, and the SKIP light flashes. 4. Press the MODE button, and make sure 2 appears on the left side of the display screen. 5. Use the ∆ and ∇ buttons to adjust the alarm point to the setting you want. 6. Press the SET button to confirm the new alarm point. The SPAN light turns on indicating that the Model GD-K11D accepted the new setting. 7.
Adjusting the Alarm Type You can program the Model GD-K11D’s alarm to activate on increasing readings or decreasing readings. The factory-set alarm type is increasing. 1. Loosen the thumbscrew at the top of the housing. 2. Rotate the housing cover toward the bottom of the housing to gain access to the interior of the Model GD-K11D. 3. Adjust the INT switch to the “7” position. The current alarm type displays, and the SKIP light flashes.
Alarms This section describes the Model GD-K11D’s visual indications for normal, alarm, and fail conditions. This section also suggests response to these conditions. Alarm Indications Table 5 lists the indications for normal, alarm and fail conditions. The Model GD-K11D includes an alarm delay feature. The alarm indications listed below are delayed by 3 seconds once the Model GD-K11D recognizes an alarm or fail condition.
Maintenance This section describes maintenance procedures for the Model GD-K11D. It includes preventive maintenance and troubleshooting procedures. Preventive Maintenance This section describes a preventive maintenance schedule to ensure the optimum performance of the Model GD-K11D. It includes daily, quarterly, and biannual procedures. Daily 1. Verify that the PW/TR (power) light is on. If the power light is not on, see the troubleshooting guide in this manual. 2.
Troubleshooting The troubleshooting table describes error messages, symptoms, probable causes, and recommended action for problems you may encounter with the Model GD-K11D. Table 8: Troubleshooting the Model GD-K11D Symptoms Probable Causes Recommended Action • E-00 on display screen • Memory error 1. Contact RKI Instruments, Inc. • • • E-01 on display screen PW/TR light is flashing Output is 0.5 mA • Sensor is disconnected 1.
4. Pull the metal restraining bracket that secures the sensor in the housing away from the sensor, then rotate the bracket to the right. 5. Slide the sensor to the left (toward the pump), then remove the sensor from the flow chamber. 6. Disconnect the connector from the sensor, then remove the sensor from the housing. Installing the replacement sensor 1. Connect the connector to the replacement sensor, then install the sensor in the same position as the original sensor. 2.
4. Use the ZERO potentiometer to adjust the display reading to zero. 5. Press the MODE button. The ZERO light turns off, and 3. appears on the display screen. 6. Press the MODE button for approximately 3 seconds to exit maintenance mode and return to the normal screen (measuring mode). 7. Rotate the housing cover up to its original position, then tighten the thumbscrew at the top of the housing to secure the cover to the housing. Replacing the pump 1.
Calibration This section describes how to calibrate the Model GD-K11D. It includes procedures to prepare for calibration, set the zero reading, set the response (span) reading, and return to normal operation. WARNING: The Model GD-K11D is not an active gas monitoring device during the calibration procedure. Preparing for Calibration NOTE: This procedure describes calibration using the RKI calibration kit that includes a “demand flow” regulator.
Setting the Response (Span) Reading 1. Adjust the INT switch to the “1” position. The INT switch is the rotary switch located on the amplifier circuit board (see Figure 1, Model GD-K11D Component Location). The display reading, SPAN light, and SKIP light flash. 2. Press the MODE button, and make sure 1 appears on the left side of the display screen. 3. Screw the regulator into the calibration cylinder. 4. Connect the tubing from the Model GD-K11D’s gas in fitting to the regulator.
