65-2516RK Oxygen Transmitter Operator’s Manual Part Number: 71-0116RK Revision: 0 Released: 3/1/11 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 Oxygen Detector . . . . . . . . . . . . . . . . . . . . . .
Overview This instruction manual describes the explosion proof capillary type oxygen transmitter. This manual also describes how to install, start up, configure, maintain, and calibrate the transmitter when using it with a gas monitoring controller. A parts list at the end of this manual lists replacement parts and accessories for the oxygen transmitter. See the controller operator’s manual for information specific to the controller.
Description This section describes the components of the oxygen transmitter. The transmitter consists of the oxygen detector, amplifier, and junction box.
Sensor The sensor is secured within the sensor housing by the two 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. Amplifier The amplifier converts the electrical output from the sensor to a 4 to 20 mA signal (that is proportional to the detection range) and transmits the signal to a gas monitoring controller.
Junction Box Use the junction box to install the oxygen 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 oxygen detector and amplifier are factory-mounted to the junction box.
NOTE: The oxygen detector used in this transmitter is normally provided with a Killark HKB junction box 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 Class I, Groups B, C, and D may be used for this transmitter as long as the amplifier will fit in it. 2.
. Connect the wires to the to the applicable controller transmitter terminal strip as shown in Figure 3. 4 - 20 mA In (FB or S) + 24 VDC Cable Shield TP - Not Used FB + 4/20 24V Controller Transmitter Terminals,Typical TP + POWER/SIG ZERO SPAN SENSOR OXYGEN Not Used OXY W G Green White Figure 3: Wiring the Oxygen Transmitter to a Controller 11. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth) ground at the controller.
Start Up This section describes procedures to start up the oxygen 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 operator’s manual. 3. Turn on or plug in the incoming power to the controller, then turn on the controller. 4. Verify that the controller is on and operating properly.
. Turn the regulator’s on/off knob clockwise to close it. 13. Unscrew the calibration cup from the detector. 14. Unscrew the regulator from the zero air calibration cylinder. For convenience, leave the sample tubing connected to the regulator and the calibration cup. 15. Store the components of the calibration kit in a safe and convenient place. 16. Remove the voltmeter leads from the test points. 17. Secure the junction box cover to the junction box.
voltmeter decreased from the normal reading (434 mV). NOTE: If the reading does not decrease, calibrate the transmitter as described in “Calibration” on page 13 of this manual. 3. Remove the voltmeter leads from the amplifier test points, then secure the junction box cover to the junction box. 4. When the display reading rises above the decreasing alarm setpoint, return the controller to normal operation. Quarterly Calibrate the detector as described in “Calibration” on page 13.
Replacing Components of the Oxygen Transmitter This section includes procedures to replace the oxygen sensor and amplifier. A procedure to replace the entire detector assembly is at the end of this section. In most cases, it is not necessary to replace the entire detector assembly. Replacing the Oxygen Sensor 1. Turn off the controller. 2. Turn off or unplug incoming power to the controller. 3. Unscrew the detector housing cap from the detector housing. 4. Unplug and remove the oxygen sensor. 5.
10. Reconnect the wiring from the controller to the interconnect terminal strip as shown in Table 3 and Figure 3. Table 3: Reconnecting the Oxygen 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. Reconnect the detector leads to the detector terminal strip as shown in Table 4 and Figure 3.
7. Connect the detector leads to the detector terminal strip as shown in Table 4 and Figure 3. Table 5: Connecting the Replacement Oxygen Detector to the Amplifier Oxygen Detector Lead Amplifier Interconnect Terminal Strip White OXY W Green OXY G 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 oxygen transmitter. It includes procedures to prepare for calibration, set the fresh air reading, set the zero 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.
5. Turn the regulator’s on/off knob clockwise to close it. 6. Unscrew the regulator from the calibration cylinder. 7. Unscrew the calibration cup from the oxygen detector. NOTE: For convenience, leave the components of the calibration kit connected by the sample tubing. Returning to Normal Operation 1. Remove the voltmeter leads from the amplifier test points. 2. Secure the junction box cover to the junction box. 3.
Parts List Table 5 lists replacement parts and accessories for the oxygen transmitter.
