65-2320RK Oxygen Transmitter Operator’s Manual Part Number: 71-0173RK Revision: A Released: 7/3/14 RKI Instruments, Inc. 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 65-2320RK 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. Specifications Table 1 lists specifications for the oxygen transmitter.
Description This section describes the components of the oxygen transmitter. The oxygen transmitter is a 4 - 20 mA type detector head. It consists of the oxygen detector, amplifier, and junction box.
Amplifier The amplifier converts the electrical output from the detector to a 4 to 20 mA signal that corresponds to the detection range and transmits the signal to a gas monitoring controller. A foam gasket that orients the amplifier and keeps it from rotating is installed on the bottom of the amplifier. The amplifier includes the controller terminal strip, detector terminal strip, zero pot, span pot, and test points (see Figure 1).
from a mounting surface and ensure that there is enough room to install a calibration cup on the detector during calibration. Installation This section describes procedures to mount the oxygen transmitter in the monitoring environment and wire the transmitter to a controller. Mounting the Oxygen Transmitter 1. Select a mounting site that is representative of the monitoring environment. Consider the following when you select the mounting site.
Wiring the Oxygen Transmitter to a Controller WARNING: Always verify that power to the controller is off before you make wiring connections. 1. Turn off the controller. 2. Turn off power to the controller. 3. Remove the junction box cover. 4. The detector leads are factory wired. Verify that the detector leads are wired to the amplifier’s detector terminal strip as shown in Figure 3. 5.
+ S Controller Detector/Transmitter Terminals, Typical Designations Cable Shield Controller Housing S SIG/PWR TO XIC OXY SPAN ZERO J-Box Green White Oxygen Detector Figure 3: Wiring the Oxygen Transmitter to a Controller 12. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth) ground at the controller. RKI controllers typically have a ground stud that can be used to ground the cable’s drain wire.
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 power to the controller. 4. Turn on the controller. 5. Verify that the controller is on and operating properly.
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. It includes preventive maintenance, troubleshooting, and component replacement procedures. Preventive Maintenance This section describes a preventive maintenance schedule to ensure the optimum performance of the oxygen transmitter.
4. When the display reading rises above the decreasing alarm setpoint, return the controller to normal operation. Quarterly Calibrate the oxygen transmitter as described in “Calibration” on page 11 of this manual. See the calibration frequency discussion in “Calibration Frequency” on page 11 to determine if a quarterly calibration schedule fits your needs.
Replacing Components of the Oxygen Transmitter This section includes a procedure to replace the oxygen detector, and a procedure to replace the amplifier. Replacing the Oxygen Detector 1. Turn off the controller. 2. Turn off or unplug power to the controller. 3. Remove the junction box cover. 4. Remove the detector terminal strip from its socket. 5. Disconnect the detector leads from the detector terminal strip. Note the position of the color-coded leads as you remove them. 6.
8. Install the detector and controller terminals strips into their sockets on the new amplifier as shown in Figure 3 on page 6. If controller leads or detector leads were removed during this procedure, refer to Figure 3 on page 6 for the detector and amplifier connections. NOTE: When a transmitter is first powered up with a new amplifier, the initial output may be either high or below zero depending on the setting of the zero pot. Be sure to make arrangements so that this does not cause unwanted alarms.
5. Use the following formula to determine the correct test points output for the calibrating sample. Output (mV) = (calibrating sample/fullscale) X 400 + 100 The concentration of oxygen in the atmosphere is 20.9%, so when setting the fresh air reading, you will set the test points output to 434 mV (±2 mV). 434(mV) = (20.9/25) X 400 +100 NOTE: Calibrating the oxygen transmitter may cause alarms. Be sure to put the controller into its calibration program or disable external alarms before continuing. 6.
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. When the controller display reading rises above the decreasing alarm setpoint, return the controller to normal operation. NOTE: If you do not allow the gas reading to increase above the decreasing alarm point, then unwanted alarms may occur. 4. Verify that the controller display reading increases and stabilizes at 20.9% volume. 5.
