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Summary of Contents for RKI Instruments 65-2451RK-04SS
- Page 1 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Part Number: 71-0665 Revision: P1 Released: 2/8/24 RKI Instruments, Inc. www.rkiinstruments.com...
- Page 2 For most applications, typical calibration frequencies are between 3 and 6 months but can be more often or less often based on your usage. 2 • 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual...
- Page 3 We do not assume indemnification for any accident or damage caused by the operation of this gas monitor and our warranty is limited to the replacement of parts or our complete goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does not cover field labor or shipment of parts back to RKI.
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Page 4: Table Of Contents
Parts List ............23 4 • 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual... -
Page 5: Overview
± 5% of reading or ± 2% LEL (whichever is greater) WARNING: When using the 65-2451RK-04SS, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 65-2451RK-04SS and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 65-2451RK-04SS as described in this manual. -
Page 6: Description
(flame arrestor end). The rainshield helps protect the detector from rain and debris in the monitoring environment. Four color-coded leads extend from the top of the detector. The leads allow you to connect the detector to the amplifier. 6 • Description 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual... -
Page 7: Calibration Cup/Splash Guard
This drive current is factory set and is dictated by the combustible gas to which the detector is calibrated. Consult RKI Instruments, Inc. if you plan to change the calibration gas for the transmitter, for example from a hydrogen calibration to a methane calibration. The amplifier includes the detector terminal strip, controller terminal strip, span pot, zero pot, and test points (see Figure 1). -
Page 8: Amplifier Junction Box
For hydrogen, which is lighter than air, mount the transmitter near the ceiling or where hydrogen is most likely to accumulate. • The junction boxes should be mounted no further than 200 feet from each other. 8 • Installation 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual... -
Page 9: Wiring The Detector To The Amplifier
2. Remove the detector junction box’s cover from the junction box. 3. Remove the amplifier junction box’s cover from the junction box. 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Installation • 9... - Page 10 To make wiring more convenient, use wire colors that correspond to the detector wire colors: red, white, green, and black. NOTE: Consult RKI Instruments, Inc. for cable lengths longer than 200 feet. 5. Connect the detector leads to the terminal block in the detector junction box.
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Page 11: Wiring The Amplifier To A Controller
3. Remove the amplifier junction box’s cover from the junction box. 4. Guide a three-conductor, shielded cable, or three wires in conduit through the top conduit hub of the amplifier junction box. 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Installation • 11... - Page 12 The power cable may disrupt the transmission of the transmitter signal to the controller. 9. Connect the wires to the applicable detector/transmitter terminal strip at the controller as shown in Figure 4. 12 • Installation 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual...
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Page 13: Startup
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. 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Start Up • 13... -
Page 14: Setting The Zero Signal
The procedure below describes applying zero emission air, usually called zero air, 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. -
Page 15: Maintenance
Verify a display reading of 0 %LEL at the controller. Investigate significant changes in the display reading. Quarterly Calibrate the hydrogen transmitter as described in “Calibration” on page 20 of this manual. 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Maintenance • 15... -
Page 16: Troubleshooting
5. If the calibration/response calibration once disconnected. difficulties continue, replace the every 3 months. detector. 6. If the calibration/response Some applications difficulties continue, contact RKI may require a more for further instruction. frequent calibration schedule. 16 • Maintenance 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual... -
Page 17: Replacing Components Of The Hydrogen Transmitter
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the next step. 13. Calibrate the transmitter as described in “Calibration” on page 20 of this manual. 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Maintenance • 17... - Page 18 S (4 - 20 mA In) PWR/SIG “+” + 24V Table 4: Reconnecting the LEL Detector to the Amplifier Amplifier Detector Detector Lead Terminal Strip DETECTOR “R” DETECTOR “W” DETECTOR “G” GREEN DETECTOR “B” 18 • Maintenance 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual...
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Page 19: Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a calibration frequency of every 3 to 6 months is adequate for most hydrogen transmitter applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months. -
Page 20: Calibration
3. Plug the voltmeter leads into the test points on the amplifier. Plug the positive lead into the red (+) test point; plug the negative lead into the black (-) test point. 20 • Calibration 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual... -
Page 21: Setting The Zero Reading
If necessary, use the span pot on the amplifier to adjust the reading to match the correct response reading. 4. Turn the regulator’s on/off knob clockwise to close the regulator. 5. Unscrew the regulator from the calibration cylinder. 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual Calibration • 21... -
Page 22: Returning To Normal Operation
4. When the controller display reading falls below the alarm setpoints, return the controller to normal operation. 5. Verify that the controller display reading decreases and stabilizes at 0 %LEL. 6. Store the components of the calibration kit in a safe and convenient place. 22 • Calibration 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual... -
Page 23: Parts List
Amplifier with gasket (specify detector part number when ordering) 65-2451RK-04SS Hydrogen transmitter (includes detector, two junction boxes, and amplifier) 71-0665 65-2451RK-04SS Hydrogen Transmitter Operator’s Manual (this document) 81-0002RK-01 Steel calibration cylinder, 50% LEL hydrogen in air, 34-liter 81-0076RK-01 Steel calibration cylinder, zero emission air, 34-liter 81-1050RK Regulator, 0.5 liter/minute;...
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