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Summary of Contents for RKI 65-2481RK
- Page 1 65-2481RK Multi Point Detector Operator’s Manual Part Number: 71-0204RK Revision: A Released: 8/2/11 RKI Instruments, Inc. www.rkiinstruments.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. 65-2481RK Multi Point Detector...
- 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 ..............26 65-2481RK Multi Point Detector... -
Page 5: Overview
Overview This manual describes the 65-2481RK multi point direct connect detector. This manual also describes how to install, start up, maintain, and calibrate the detector when it is used with a gas monitoring controller. A parts list at the end of this manual lists replacement parts and accessories for the detector. - Page 6 WARNING: When using the 65-2481RK, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 65-2481RK and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 65-2481RK as described in this manual.
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Page 7: Description
Four color- coded leads extend from the top of the detector. The leads allow you to connect the detector to the terminal block. 65-2481RK Multi Point Detector • 3... - Page 8 (in case the replacement sensor label that is applied to one of the leads is lost), a short length of red shrink tubing is applied to the white wire of the propane detector near where the wire comes out of the nipple. 4 • 65-2481RK Multi Point Detector...
- Page 9 The plug-in sensor is secured in the detector assembly by the housing cap. It has two pins that mate with the sockets in the detector housing body. Through a series of chemical and electrical reactions, the sensor produces an electrical output that corresponds to the detection range of the transmitter. 65-2481RK Multi Point Detector • 5...
- Page 10 The disc-shaped charcoal filter is secured to the face of the CO sensor with a rubber boot. The charcoal filter prevents interference gases (hydrogen sulfide [H S] and certain hydrocarbons) from producing false CO readings. 6 • 65-2481RK Multi Point Detector...
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Page 11: Conduit Seal
Use the junction boxes to install the multi-point detector at a mounting site that is remote from the controller. The junction boxes protect the terminal strips and wiring connections made to the terminal strips. Use the top 3/4’’ conduit hub to connect wiring from the 65-2481RK Multi Point Detector • 7... -
Page 12: Installation
.20 DIA X .45 Slot, (2X), mounting 7.75 3/4 NPT Hubs (4X) 3.15 2.40 3.11 1.25 19.0 Max. H2S Detector CO Detector 3/4" NPT Nipple(2X) Conduit Seal 1.10 LEL Detector Oxygen Detector Figure 6: Outline & Mounting Dimensions 65-2481RK 8 • 65-2481RK Multi Point Detector... - Page 13 1.10 Detector Detector Figure 7: Outline and Mounting Dimensions 65-2481RK-01 and 65-2481RK-02 At the mounting site you select, use #10 screws to mount the detector to a vertical surface. CAUTION: Mount the multi-point detector with the detectors facing down (see Figures 6-7).
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Page 14: Wiring The Multi-Point Detector To A Controller
Route the cable or wires leading from the multi-point detector through one of the conduit hubs at the controller housing. Use appropriate conduit fittings and construction technique for the environmental rating of the controller. RKI controllers are typically rated NEMA 4X. - Page 15 BLACK H2S D ETEC TOR CO D ETEC TOR WHITE GREEN BLACK WHITE GREEN WHITE WHITE GREEN GREEN BLACK LEL D ETEC TOR OXYGEN D ETECTOR Figure 8: Wiring the 65-2481RK to a Controller 65-2481RK Multi Point Detector • 11...
- Page 16 H2S D ETEC TOR CO D ETEC TOR WHITE GREEN BLACK WHITE GREEN WHITE WHITE GREEN GREEN BLACK IR L EL D ETECTOR OXYGEN D ETECTOR Figure 9: Wiring a 65-2481RK-01 or 65-2481RK-02 to a Controller 12 • 65-2481RK Multi Point Detector...
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Page 17: Startup
Connect the cable’s drain wire to an available chassis 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 multi-point detector and place the detector into normal operation. -
Page 18: Maintenance
This procedure describes a test to verify that each detector in the multi-point detector responds properly to its target gas. It describes a test using 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 19 When the controller display reading falls below the alarm setpoints, return the controller to normal operation. Store the components of the calibration kit in a safe place. Quarterly Calibrate the multi-point detector as described in the Calibration section of this manual. 65-2481RK Multi Point Detector • 15...
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Page 20: Troubleshooting
1. Replace charcoal filter in the CO reading that cannot detector is saturated detector. Upscale be verified. and no longer Readings or 2. If difficulties continue, contact RKI for scrubbing out Alarms • Alarms occur at the further instructions. interfering gases. controller that cannot be explained. -
Page 21: Replacing Components Of The Multi-Point Detector
Unscrew the detector housing cap from the detector housing body. Make sure not to lose the cap gasket. Unplug and remove the oxygen sensor. Carefully plug the replacement sensor into the socket pattern that is located in the detector housing. 65-2481RK Multi Point Detector • 17... - Page 22 10. Turn on the controller. CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the next step. 11. Calibrate the replacement detector as described in “Calibration, O Detector” on page 24. 18 • 65-2481RK Multi Point Detector...
- Page 23 Carefully plug the replacement sensor into the four-socket pattern that is located in the detector housing. 10. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector housing body. 65-2481RK Multi Point Detector • 19...
- Page 24 Unscrew the detector housing cap from the detector housing body. Make sure not to lose the cap gasket. Unplug and remove the H S sensor. Carefully plug the replacement sensor into the socket pattern that is located in the 20 • 65-2481RK Multi Point Detector...
- Page 25 Although there is no particular calibration frequency that is correct for all applications, a calibration frequency of every 3 months is adequate for most multi-point detector applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months for the catalytic...
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Page 26: Calibration, Lel, H 2 S And Co Detectors
RKI Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow regulator. To properly calibrate the multi-point detector, you must calibrate each connected detector. -
Page 27: Setting The Zero Reading
Verify that the controller display reading decreases and stabilizes at: • 0 %LEL for combustible gas • 0 ppm for CO or H Store the components of the calibration kit in a safe and convenient place. 65-2481RK Multi Point Detector • 23... -
Page 28: Calibration, Oxygen Detector
Put the controller into its calibration program. See the controller operator’s manual for instructions to enter the calibration program. NOTE: RKI controllers have a peak hold feature for fresh air adjustment and a minimum hold feature for zero adjustment. Because of this, the instructions call for turning off the gas to a detector before making adjustments. -
Page 29: Setting The Zero Reading
NOTE: If you do not allow the gas reading to rise above the alarm points, then unwanted alarms may occur. Verify that the controller display reading increases and stabilizes at 20.9% oxygen. Store the components of the calibration kit in a safe and convenient place. 65-2481RK Multi Point Detector • 25... -
Page 30: Parts List
Multi-point detector assembly, LEL (IR HC)/O S/CO 65-2514RK Oxygen replacement detector assembly (includes sensor) 71-0204RK 65-2481RK Multi Point Detector Operator’s Manual (this document) 81-0004RK Calibration cylinder, 50% LEL propane in air, 17 liter steel 81-0004RK-01 Calibration cylinder, 50% LEL propane in air, 34 liter steel... - Page 31 Regulator with gauge and knob, 0.5 LPM , for 34AL/58/103 liter calibration cylinders 81-1103RK Calibration cup for IR LEL detector 81-1117RK Calibration cup for catalytic LEL, CO, H S, and O detectors ES-1531-CO CO replacement plug-in sensor ES-1537-H2S S replacement plug-in sensor 65-2481RK Multi Point Detector • 27...
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