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Summary of Contents for RKI Instruments 65-2451RK-04
- Page 1 65-2451RK-04 Hydrogen Transmitter Operator’s Manual Part Number: 71-0298RK Revision: P1 Released: 11/8/13 1.888.610.7664 www.calcert.com sales@calcert.com...
- Page 2 Typical calibration frequencies for most applications are between 3 and 6 months, but can be required more often or less often based on your usage. 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com sales@calcert.com...
- Page 3 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.
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Page 4: Table Of Contents
Parts List ..............19 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664... -
Page 5: Overview
WARNING: When using the 65-2451RK-04, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 65-2451RK-04 and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 65-2451RK-04 as described in this manual. -
Page 6: Description
+ T est P oint - Test P oint Terminal S tr ip Detector Term inal Strip Am plifier J-Box Detector J -Box Hydrogen Detector Calibration Cup/S plash G uard Figure 1: Hydrogen Transmitter Component Location 2 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com sales@calcert.com... -
Page 7: Hydrogen Detector
The span pot is located to the right of the zero pot (see Figure 1). Use a small flat blade screwdriver to turn the span pot’s adjustment screw and adjust the amplifier’s gas 65-2451RK-04 Hydrogen Transmitter • 3 1.888.610.7664 www.calcert.com... -
Page 8: Amplifier Junction Box
For hydrogen, which is lighter than air, mount the transmitter near the ceil- ing or where hydrogen is most likely to accumulate. • The junction boxes should be mounted no further than 200 feet from each other. 4 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com sales@calcert.com... - Page 9 Install 3/16 inch I.D. flexible polyurethane tubing to the fitting at the bottom of the calibration cup/splash guard and route it to an accessible area that is close to the amplifier junction box. See the “Parts List” on page 19 for available tubing. 65-2451RK-04 Hydrogen Transmitter • 5 1.888.610.7664 www.calcert.com...
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Page 10: Wiring The Detector To The Amplifier
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. Connect the detector leads to the terminal block in the detector junction box. - Page 11 Install a lug on the shield drain wire or wrap the shield drain wire around the mounting screw. Do not connect the shield drain wire at the detector junction box. 65-2451RK-04 Hydrogen Transmitter • 7 1.888.610.7664 www.calcert.com sales@calcert.com...
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Page 12: Wiring The Amplifier To A Controller
CAUTION: Do not route power and transmitter wiring through the same controller conduit hub. The power cable may disrupt the transmission of the transmitter signal to the controller. Connect the wires to the applicable detector/transmitter terminal strip at the controller as shown in Figure 4. 8 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com sales@calcert.com... - Page 13 10. 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. 65-2451RK-04 Hydrogen Transmitter • 9 1.888.610.7664 www.calcert.com...
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Page 14: Startup
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
NOTE: The following procedure assumes the use of a calibration kit which includes a calibration gas cylinder, a 0.5 LPM fixed flow regulator with an on/off knob, a calibration cup for the detector, and a length of sample tubing. 65-2451RK-04 Hydrogen Transmitter • 11 1.888.610.7664 www.calcert.com... - Page 16 When the controller display reading falls below the alarm setpoints, return the controller to normal operation. 10. Store the components of the calibration kit in a safe place. Quarterly Calibrate the hydrogen transmitter as described in “Calibration” on page 17 of this manual. 12 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com sales@calcert.com...
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Page 17: Troubleshooting
This junction box was likely installed somewhere difficult to access. Turn off the controller. Turn off or unplug power to the controller. Unscrew the calibration cup/splash guard from the detector. Remove the detector junction box’s cover from the junction box. 65-2451RK-04 Hydrogen Transmitter • 13 1.888.610.7664 www.calcert.com sales@calcert.com... - Page 18 5 above. Install the detector and controller terminals strips into their sockets on the new amplifier as shown in Figure 4 on page 9 of this manual. If controller leads or detector 14 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com...
- Page 19 The hydrogen transmitter’s 4-20 mA signal should be stable by the time the controller’s warmup period is over. 12. Allow the transmitter to warm-up for 5 minutes. 13. Calibrate the transmitter as described in “Calibration” on page 17 of this manual. 65-2451RK-04 Hydrogen Transmitter • 15 1.888.610.7664 www.calcert.com sales@calcert.com...
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Page 20: Calibration Frequency
10. Add 1 minute to the length of time determined in step 6. This is the response time for the detector. When performing a response test, zero adjustment, or span adjustment, gas must be applied for this length of time. 16 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com... -
Page 21: Calibration
100 mV (±2 mV). Turn the regulator’s on/off knob clockwise to close the regulator. Unscrew the regulator from the zero air calibration cylinder. 65-2451RK-04 Hydrogen Transmitter • 17 1.888.610.7664 www.calcert.com sales@calcert.com... -
Page 22: Setting The Response Reading
When the controller display reading falls below the alarm setpoints, return the controller to normal operation. Verify that the controller display reading decreases and stabilizes at 0 %LEL. Store the components of the calibration kit in a safe and convenient place. 18 • 65-2451RK-04 Hydrogen Transmitter 1.888.610.7664 www.calcert.com sales@calcert.com... -
Page 23: Parts List
57-1053RK Amplifier with gasket (specify detector part number when ordering) 65-2451RK-04 Hydrogen transmitter (includes detector, two junction boxes, and amplifier) 71-0298RK 65-2451RK-04 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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