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65-2340RK Toxic Gas Transmitter • 17

CAUTION: 

Allow the replacement detector to warm up for 5 minutes

 

before you continue 

with the next step.

12. Calibrate the replacement detector as described in “Calibration” on page 18.

Replacing the Amplifier

1. Turn off the controller.

2. Turn off or unplug power to the controller.
3. Remove the junction box cover.
4. Unplug the detector terminal strip and controller terminal strip from their sockets. You 

may leave the wires connected to the terminal strips.

5. Unscrew and remove the screw with the flat and lock washers that secures the amplifier to 

the junction box.

6. Remove the old amplifier.
7. Install the new amplifier into the junction box with the screw, lock washer, and flat washer 

you removed in Step 5 above. A foam gasket that orients the amplifier and keeps it from 
rotating is installed on the bottom of the amplifier. Make sure the amplifier is seated flat in 
the junction box.

8. Install the detector and controller terminal strips into their sockets on the new amplifier as 

shown in Figure 5 on page 12. If controller leads or detector leads were removed during 
this procedure, refer to Figure 5 on page 12 for the detector and amplifier connections.

NOTE:

When a transmitter is first powered up with a new amplifier, the initial output may be 
either high or below zero depending on the setting of the zero pot. Be sure to make 
arrangements so that this does not cause unwanted alarms.

9. Turn on power to the controller.
10. Turn on the controller and place it into normal operation.

11. Allow the transmitter to warm-up for 5 minutes.

12. Calibrate the transmitter as described in “Calibration” on page 18 of this manual.

Calibration Frequency

Although there is no particular calibration frequency that is correct for all applications, a 
calibration frequency of every 3 months is adequate for most toxic gas transmitter 
applications. Unless experience in a particular application dictates otherwise, RKI 
Instruments, Inc. recommends a calibration frequency of every 3 months for the toxic gas 
transmitter. 

If an application is not very demanding, for example detection in a clean, temperature 
controlled environment where toxic gas is not normally present, and calibration adjustments 

Summary of Contents for 65-2340RK

Page 1: ...RKI Instruments Inc www rkiinstruments com 65 2340RK Toxic Gas Transmitter Operator s Manual Part Number 71 0143RK Revision G Released 6 12 20...

Page 2: ...c calibration and maintenance of the detector is essential for proper operation and correct readings Please calibrate and maintain this detector regularly Frequency of calibration depends upon the typ...

Page 3: ...ement costs local repair costs transportation costs or contingent expenses incurred without our prior approval THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND REPRESENTATIONS EX...

Page 4: ...iring the Toxic Gas Transmitter 11 Startup 13 Introducing Incoming Power 13 Setting the Zero Signal 13 Maintenance 14 Preventive Maintenance 14 Troubleshooting 14 Replacing Components of the Toxic Gas...

Page 5: ...en using the 65 2340RK you must follow the instructions and warnings in this manual to assure proper and safe operation of the 65 2340RK and to minimize the risk of personal injury Be sure to maintain...

Page 6: ...components of the toxic gas transmitter The toxic gas transmitter is a 4 20 mA type detector head It consists of the toxic detector amplifier and junction box Figure 1 Toxic Transmitter Component Loca...

Page 7: ...pre amplifier located between the connector and the two interconnect wires conditions the sensor s signal before the signal reaches the controller Each plug in sensor type Cl2 for example requires a...

Page 8: ...terminal strip is a four position plug in style terminal strip located below the controller terminal strip Two of the positions are for use with an oxygen sensor and are not used in the toxic gas tra...

Page 9: ...mitter at a mounting site that is remote from the controller The junction box protects the amplifier and wiring connections made to the amplifier Use the top 3 4 NPT conduit hub to connect wiring from...

Page 10: ...e 4 Mounting the Toxic Gas Transmitter 2 At the monitoring site you select hang or mount the junction box with the detector facing down see Figure 4 3 65 Rubber Spacer 3X 3 4 NPT Conduit Hub 0 38 75 2...

Page 11: ...ox 7 Pull out the controller terminal strip and connect the two wires to the terminal strip as follows see Figure 5 Connect the positive wire to the SIG PWR terminal Connect the signal wire to the SIG...

Page 12: ...oller RKI controllers typically have a ground stud that can be used to ground the cable s drain wire Gas Type Table Gas Type W ire 0 10 ppm Cl2 0 3 ppm Cl2 S SIG P W R TO XIC OX Y Z E R O Controller D...

Page 13: ...of toxic gas in the monitoring environment use the calibration kit and the zero air calibration cylinder to introduce fresh air to the detector and verify an accurate zero setting See Calibration on p...

Page 14: ...s transmitter NOTE This troubleshooting guide describes transmitter problems only See the controller operator s manual for problems you may encounter with the controller Table 2 Troubleshooting the To...

Page 15: ...al circumstances the transmitter requires calibration once every 3 months Some applications may require a more frequent calibration schedule The calibration cylinder is low out dated or defective The...

Page 16: ...n sensor 1 Turn off the controller 2 Turn off or unplug power to the controller 3 Remove the junction box cover 4 Remove the detector terminal strip from its socket 5 Disconnect the detector leads fro...

Page 17: ...plifier as shown in Figure 5 on page 12 If controller leads or detector leads were removed during this procedure refer to Figure 5 on page 12 for the detector and amplifier connections NOTE When a tra...

Page 18: ...you dedicate a regulator for use with chlorine Cl2 gas and that you do not use that dedicated regulator for any other gases particularly hydrogen sulfide H2S WARNING Not using the recommended calibrat...

Page 19: ...screwed onto the housing body 7 Push the calibration cup onto the plug in sensor that sticks through the housing cap The calibration cup seals to the sensor with an O ring Setting the Zero Fresh Air R...

Page 20: ...u determined earlier If necessary use the span pot on the amplifier to adjust the reading to match the correct response reading 4 Turn the regulator knob clockwise to close the regulator 5 Unscrew the...

Page 21: ...in sensor 65 2300RK SO2 Replacement detector assembly SO2 includes plug in sensor 71 0143RK 65 2340RK Operator s Manual this document 81 0076RK Zero air calibration cylinder 17 liter 81 0076RK 01 Zero...

Page 22: ...cylinder 81 F503RK LV Calibration kit includes regulator calibration cup and a 34 liter 10 ppm NH3 in nitrogen aluminum calibration cylinder 81 F603RK Calibration kit includes regulator calibration cu...

Page 23: ...Gas Transmitter 23 ESM K01 D CL2 ESM 01 plug in sensor 0 3 00 ppm chlorine diffusion type only ESM K01D CL2 10 ESM 01 plug in sensor 0 10 0 ppm chlorine diffusion type only Table 4 Parts List Part Num...

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