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65-2340RK Toxic Gas Transmitter • 5

Overview

This manual describes the 65-2340RK toxic gas transmitter. This manual also describes how 
to install, start up, maintain, and calibrate the toxic gas transmitter when used with a gas 
monitoring controller. A parts list at the end of this manual lists replacement parts and 
accessories for the toxic gas transmitter.

The 65-2340RK toxic gas transmitter can be used for various target gases which are listed in 
Table 1 below. For a particular target gas, the part number of the toxic transmitter will be of 
the format 65-2340RK-XXX. For example, 65-2340RK-NH3 is for ammonia (NH

3

detection.

Specifications

Table 1 lists specifications for the toxic gas transmitter.

WARNING: When 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 and periodically 
calibrate the 65-2340RK as described in this manual.

Table 1: Specifications

Target Gas

65-2340RK-ASH3: Arsine (AsH

3

)

65-2340RK-CL2: Chlorine (Cl

2

)

65-2340RK-CL-10: Chlorine (Cl

2

)

65-2340RK-HCN: Hydrogen Cyanide (HCN)
65-2340RK-NH3: Ammonia (NH

3

)

65-2340RK-SO2: Sulphur Dioxide (SO

2

)

65-2340RK-PH3: Phosphine (PH

3

)

Sampling Method

Diffusion

Detection Range

AsH

3

: 0 - 1.50 ppm

Cl

2

: 0 - 3.00 ppm

Cl

2

: 0 - 10.0 ppm

HCN: 0 - 15.0 ppm
NH

3

: 0 - 75.0 ppm

SO

2

: 0 - 6.00 ppm

PH

3

: 0 - 1.00 ppm

Accuracy

± 10% of reading or ± 5% of full scale (whichever is greater)

Signal Output

4 to 20 mA

Response Time

• Cl

2

 and NH

3

: T90 in 90 seconds

• All others: T90 in 45 seconds

Operating Temperature & 
Humidity

• 14°F to 104°F (-10°C to 40°C)
• 20% to 90% Relative Humidity

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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