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65-2394RK-CH4-4 Combustible Gas Transmitter • 9

Figure 4: Wiring the Amplifier to a Controller

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.

Cable Shield

Amplifier (Transmitter)

White

Green

Detector Wires

Controller or

Recording Device

4 - 20 mA In (S)

+ 24 VDC

- (DC Ground)

Amplifier

J-Box

Red

W

LE

L

G

R

S

Black

B

P

W

R

/

S

IG

www.

GlobalTestSupply

.com

Find Quality Products Online at:

[email protected]

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Содержание 65-2394RK-CH4-4

Страница 1: ...65 2394RK CH4 4 Combustible Gas Transmitter Operator s Manual Part Number 71 0277RK Revision P1 Released 4 9 13 www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Страница 2: ... transmitter is essential for proper operation and correct readings Please calibrate and maintain this transmitter regularly Frequency of calibration depends upon the type of use you have and the sensor types 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 www GlobalTestSupply com Find Quality Produc...

Страница 3: ...portation costs or contingent expenses incurred without our prior approval THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND REPRESENTATIONS EXPRESSED OR IMPLIED AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI INSTRUMENTS INC INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL RKI INSTRUMENTS INC BE LIA...

Страница 4: ...r 6 Wiring the Amplifier to a Controller 7 Startup 10 Introducing Incoming Power 10 Setting the Zero Signal 10 Maintenance 11 Preventive Maintenance 11 Troubleshooting 13 Replacing Components of the Combustible Gas Transmitter 13 Calibration Frequency 15 Determining Response Time 16 Calibration 16 Preparing for Calibration 17 Setting the Zero Reading 17 Setting the Response Reading 17 Returning to...

Страница 5: ... 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 Table 1 Specifications Description Specification Target Gas 65 2394RK CH4 4 Methane CH4 Area Classification Explosionproof for Class I Groups B ...

Страница 6: ...ration cup splash guard amplifier the amplifier junction box and the detector junction box The two junction box configuration is intended for situations where the detector needs to be installed at an inaccessible location The detector junction box can be installed at the inaccessible location and the amplifier junction box can be installed in a more readily accessible area Figure 1 Combustible Gas...

Страница 7: ... detector is calibrated Consult RKI Instruments Inc if you plan to change the calibration gas for the transmitter for example from a methane calibration to a hexane calibration The amplifier includes the detector terminal strip controller terminal strip span pot zero pot and test points see Figure 1 Controller Terminal Strip The controller terminal strip is a three position plug in style terminal ...

Страница 8: ...ction box The IR LEL detector is factory installed in the bottom 3 4 conduit hub A terminal strip is provided for wiring connections and the detector is factory wired to one side of this terminal strip The other side of the terminal strip is for user supplied wiring to the detector terminal strip located in the amplifier junction box This wiring should go through the top 3 4 conduit hub Three spac...

Страница 9: ... 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 38 2 70 J Box Rubber Spacer 3X 75 3 4 NPT Female 3 65 Calibration Cup Splash Guard IR LEL Detector 9 00 MAX 5 25 www GlobalTestSupply com Find Quality Products Online...

Страница 10: ...n box 7 Guide the other end of the four conductor shielded cable or four wires in conduit through the bottom conduit hub of the amplifier junction box 8 To gain access to a plug in terminal strip for wiring pull it out of its socket by grasping the terminal strip and pulling The detector strip is keyed so that the controller and detector terminal strips cannot be reversed inadvertently 9 Pull out ...

Страница 11: ...nstall 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 Wiring the Amplifier to a Controller 1 Turn off the controller 2 Turn off or unplug power to the controller Detector Terminal Strip Cable Shield Red White Green Black L EL Amplifier W PW R SIG S B R G Red White Green Black Amplifier J Box C...

Страница 12: ...connected and insulated at the amplifier junction box You will connect the opposite end of the cable s drain wire to the controller s chassis earth ground 6 Reinstall the controller terminal strip into its socket 7 Secure the amplifier junction box s cover to the junction box 8 Route the cable or wires leading from the amplifier junction box through one of the conduit hubs at the controller housin...

Страница 13: ...arth ground at the controller RKI controllers typically have a ground stud that can be used to ground the cable s drain wire Cable Shield Amplifier Transmitter White Green Detector Wires Controller or Recording Device 4 20 mA In S 24 VDC DC Ground Amplifier J Box Red W LEL G R S Black B PWR SIG www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Страница 14: ...ext section Setting the Zero Signal Setting the Zero Signal WARNING Do not remove the junction box cover while the circuits are energized unless the area is determined to be non hazardous Keep the junction box cover tightly closed during operation NOTE If you can verify that the combustible gas transmitter is in a fresh air environment you do not need to apply zero air to the detector before adjus...

Страница 15: ...t includes preventive maintenance troubleshooting and component replacement procedures Preventive Maintenance This section describes a preventive maintenance schedule to ensure the optimum performance of the combustible gas transmitter It includes daily monthly and biannual procedures Daily Verify a display reading of 0 LEL at the controller Investigate significant changes in the display reading M...

Страница 16: ...e correct output is 300 mV 300 mV 50 100 X 400 100 Performing the response test 1 Turn the regulator s on off knob counterclockwise to open the regulator Gas will begin to flow 2 Allow the gas to flow for the length of time determined in Determining Response Time on page 16 3 Verify that the reading is within 20 of the response reading you determined earlier NOTE If the reading is not within 20 of...

Страница 17: ...and secure 2 Calibrate the transmitter 3 If the fail condition continues replace the detector 4 If the fail condition continues contact RKI for further instruction Slow or No Response Difficult or Unable to Calibrate Transmitter responds slowly or does not respond to response test Unable to accurately set the zero or response reading during calibration Transmitter requires frequent calibration Not...

Страница 18: ...signal should be stable by the time the controller s warmup period is over 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 16 of this manual Replacing the Amplifier NOTE The amplifier is not housed in the same junction box as the IR LEL detector The amplifier junction box should ...

Страница 19: ...e 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 16 of this manual Calibration Frequency Although there is no particular calibration frequency that is correct for all applications a calibration frequency of every 6 months is adequate for most infrared combustible gas transmitter applications ...

Страница 20: ...art a stopwatch 6 When you first start to notice an increase in the gas reading note how much time passed between starting the gas flow and noticing a reading response 7 Turn the regulator s on off knob clockwise to close the regulator 8 Unscrew the regulator from the calibration cylinder 9 Disconnect the calibration cup splash guard s flexible tubing from the regulator NOTE Do not disconnect the ...

Страница 21: ...e flexible tubing coming from the calibration cup splash guard to connect the regulator to the calibration cup 3 Turn the regulator s on off knob counterclockwise to open the regulator 4 Allow the gas to flow for the length of time determined in Determining Response Time on page 16 and verify a reading of 100 mV 2 mV If necessary use the zero pot on the amplifier to adjust the reading to 100 mV 2 ...

Страница 22: ...ifier with gasket specify detector part number when ordering 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 meth...

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