65-2432RK-05 Carbon Monoxide Transmitter Operator’s Manual Part Number: 71-0113RK Revision: A Released: 2/16/11 www.rkiinstruments.
WARNING Read and understand this instruction manual before operating detector. Improper use of the detector could result in bodily harm or death. Periodic calibration and maintenance of the detector is essential for proper operation and correct readings. Please calibrate and maintain this detector regularly! Frequency of calibration depends upon the type of use you have and the sensor types.
Product Warranty RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance 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.
Table of Contents Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CO Detector . . . . . . . . . . . . . . . . . . . . . . . .
Overview This manual describes the carbon monoxide (CO) transmitter. This manual also describes how to install, start up, maintain, and calibrate the transmitter. A parts list at the end of this manual lists replacement parts and accessories for the CO transmitter. Specifications WARNING: Do not use this product in a manner not specified in this instruction manual. Table 1 lists specifications for the CO transmitter.
Description This section describes the components of the CO transmitter. The transmitter consists of the CO detector, amplifier, and junction box.
Sensor The sensor is secured within the sensor housing by the four pins. Through a series of chemical and electrical reactions, the sensor produces an electrical output that is proportional to the detector range of the transmitter. Charcoal Filter The disc-shaped charcoal filter is secured to face of the CO sensor with a rubber boot. The charcoal filter prevents interference gases (hydrogen sulfide [H2S] and certain hydrocarbons) from producing false CO readings.
transmitter’s output during the start-up and calibration procedures. Junction Box Use the junction box to install the CO transmitter at a mounting site that is remote from the controller. The junction box also protects the amplifier and wiring connections made to the amplifier. Use the two 3/4 in. conduit hubs to mount the detector to the junction box (bottom hub) and connect wiring from the amplifier to the controller (top hub). NOTE: The CO detector and amplifier are factory-mounted to the junction box.
If the CO detector is mounted to the junction box, skip to step 5. If not, continue with step 2. NOTE: The CO detector is normally provided with a Killark HKB junction and an HFC lid rated explosion proof for Class I, Groups B, C, and D. This combination is shown in Figure 2 above. Any junction box with an internal volume less than or equal to 69 cubic inches and rated explosion proof for ClassI, Groups B, C, and D may be used. 2. Remove the junction box cover. 3.
8. Secure the junction box cover to the junction box. 9. Route the cable or wires leading from the CO transmitter through one of the conduit hubs at the controller housing. CAUTION: Do not route power and transmitter wiring through the same conduit hub. The power cable may disrupt the transmission of the transmitter signal to the controller. 10. Connect the wires to the to the applicable controller transmitter terminal strip as shown in Figure 3.
Start Up This section describes procedures to start up the CO transmitter and place the transmitter into normal operation. Introducing Incoming Power 1. Complete the installation procedures described earlier in this manual. 2. Verify that the power wiring to the controller is correct and secure. Refer to the controller instruction manual. 3. Turn on or plug in the incoming power at the power source end, then turn on the controller. 4. Verify that the controller is on and operating properly.
. Unscrew the calibration cup from the detector. 13. Unscrew the regulator from the zero air calibration cylinder. For convenience, leave the sample tubing connected to the regulator and the calibration cup. 14. Store the components of the calibration kit in a safe and convenient place. 15. Remove the voltmeter leads from the test points. 16. Secure the junction box cover to the junction box. Maintenance This section describes maintenance procedures.
test point labeled TP-. 8. Use the following formula to determine the correct test points output for the test sample. Output (mV) = (calibrating sample/fullscale) X 400 + 100 For example, with a test sample of 50 PPM CO and a fullscale setting of 300 PPM, the correct output is 167 mV. 167 (mV) = (50/300) X 400 +100 Performing the response test 1. Turn the regulator on/off knob counterclockwise to open it. The sample will begin to flow. 2.
• Calibrate the transmitter. • If the fail condition continues, replace the CO sensor. • If the fail condition continues, contact RKI for further instruction. Slow or No Response/Difficult or Unable to Calibrate Symptoms • The transmitter responds slowly or does not respond during the monthly response test. • Unable to accurately set the zero or response reading during the calibration procedure. • The transmitter requires frequent calibration.
NOTE: Match the sensor’s male pins with the four female sockets as you plug the sensor into the socket. 8. Screw the bottom section of the detector housing onto the top section. 9. Turn on or plug in incoming power to the controller. 10. Turn on the controller. CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the next step. 11. Calibrate the replacement sensor as described in the Calibration section of this manual. Replacing the Charcoal Filter 1.
9. Verify that the jumper block is installed over the TOXIC selector of the amplifier type selector as shown in Figure 3. 10. Reconnect the wiring from the controller to the interconnect terminal strip as shown in Table 2 and Figure 3. Table 2: Reconnecting the CO Amplifier to a Controller Amplifier Interconnect Terminal Strip Controller Transmitter Terminal Strip (typical) 4/20 FB 4 -20 (FB) 24V + + V (11 - 30 VDC) 11.
7. Connect the detector leads to the detector terminal strip as shown in Table 4 and Figure 3. Table 4: Connecting the Replacement CO Detector to the Amplifier CO Detector Lead Amplifier Interconnect Terminal Strip Black TOXIC BK Red TOXIC RD 8. Reinstall the junction box cover. 9. Turn on or plug in incoming power to the controller. 10. Turn on the controller. CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the next step. 11.
Calibration This section describes how to calibrate the CO transmitter. It includes procedures to prepare for calibration, set the zero reading, set the response reading, and return to normal operation. It describes the test using a calibration kit that includes a calibration cup, calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow regulator.
Setting the Response Reading 1. Screw the regulator into the calibration cylinder. Verify that the calibration gas is representative of the transmitter’s target gas. 2. Turn the regulator on/off knob counterclockwise to open it. 3. Allow the gas to flow for two minutes. 4. Verify that the reading matches the response reading (± 2mV) you determined earlier. 5. If necessary, use the span pot on the amplifier to adjust the reading to match the correct response reading. 6.
Parts List Table 5 lists replacement parts and accessories for the CO transmitter.
