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Summary of Contents for RKI Instruments 65-2394RK-CH4-4
- Page 1 65-2394RK-CH4-4 Combustible Gas Transmitter Operator’s Manual Part Number: 71-0277RK Revision: P1 Released: 4/9/13 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 2 Typical calibration frequencies for most applications are between 6 and 12 months, but can be required more often or less often based on your usage. 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.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 ..............18 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www. -
Page 5: Overview
WARNING: When using the 65-2394RK-CH4-4, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 65-2394RK-CH4-4 and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 65-2394RK-CH4-4 as described in this manual. -
Page 6: Description
Description The 65-2394RK-CH4-4 combustible gas transmitter utilizes an infrared type of detector which has some advantages over a catalytic type of combustible detector. The infrared detector will generally have a longer service life than a catalytic detector, it will require calibration less often, and it can detect combustible gas even if there is no oxygen in the sample which allows detection of combustible gas in an inert atmosphere. -
Page 7: Combustible Gas Detector
Turn the adjustment screw clockwise to increase the gas response and counterclockwise to decrease the gas response. 65-2394RK-CH4-4 Combustible Gas Transmitter • 3 GlobalTestSupply www. -
Page 8: Amplifier Junction Box
For lighter gases, mount the detector near the ceiling; for heavier gases, mount the detector near the floor. • The junction boxes should be mounted no further than 200 feet from each other. 4 • 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.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 18 for available tubing. 65-2394RK-CH4-4 Combustible Gas Transmitter • 5 GlobalTestSupply www.
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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: Wiring The Amplifier To A Controller
Do not connect the shield drain wire at the detector junction box. Wiring the Amplifier to a Controller Turn off the controller. Turn off or unplug power to the controller. 65-2394RK-CH4-4 Combustible Gas Transmitter • 7 GlobalTestSupply www. .com Find Quality Products Online at:... - Page 12 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 • 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.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. 65-2394RK-CH4-4 Combustible Gas Transmitter • 9 GlobalTestSupply www.
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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. 65-2394RK-CH4-4 Combustible Gas Transmitter • 11 GlobalTestSupply www. - Page 16 10. Store the components of the calibration kit in a safe place. Biannually Calibrate the combustible gas transmitter as described in “Calibration” on page 16 of this manual. 12 • 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www. .com Find Quality Products Online at:...
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Page 17: Troubleshooting
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. 65-2394RK-CH4-4 Combustible Gas Transmitter • 13 GlobalTestSupply www. .com Find Quality Products Online at:... - 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 • 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www.
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Page 19: Calibration Frequency
6 months is adequate for most infrared combustible gas transmitter applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 6 months. If an application is not very demanding, for example detection in a clean, temperature 65-2394RK-CH4-4 Combustible Gas Transmitter •... -
Page 20: Determining Response Time
0.5 LPM fixed flow regulator with an on/off knob, a calibration cup for the detector, and a short piece of sample tubing to connect the regulator to the calibration cup. 16 • 65-2394RK-CH4-4 Combustible Gas Transmitter GlobalTestSupply www. -
Page 21: Preparing For Calibration
(±2 mV) you determined earlier. If necessary, use the span pot on the amplifier to adjust the reading to match the correct response reading. Turn the regulator’s on/off knob clockwise to close the regulator. Unscrew the regulator from the calibration cylinder. 65-2394RK-CH4-4 Combustible Gas Transmitter • 17 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... -
Page 22: Returning To Normal Operation
61-0190RK-CH4 Methane infrared LEL detector 65-2394RK-CH4-4 Methane transmitter (includes detector, two junction boxes, and amplifier) 71-0277RK 65-2394RK-CH4-4 Combustible Gas Transmitter Operator’s Manual (this document) 81-0004RK-01 Steel calibration cylinder, 50% LEL propane in air, 34-liter 81-0012RK-01 Steel calibration cylinder, 50% LEL methane in air, 34-liter...
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