background image

8 • 65-2405RK-05 Combustible Gas Transmitter

Maintenance

This section describes maintenance procedures. It 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 quarterly 
procedures.

Daily

Verify a display reading of 0 %LEL at the controller. Investigate significant changes in the 
display reading.

Monthly

This procedure describes a test to verify that the combustible gas transmitter responds 
properly to the target gas. 

WARNING: The controller is not an active gas monitoring device during the response 

test procedure.

NOTE:

Performing a response test on the combustible gas transmitter may cause alarms. 
Be sure to put the controller into its calibration mode or disable external alarms 
before performing this test.

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.

Preparing for the response test

1.

Place the controller into its calibration mode or disable external alarms.

2.

Verify that the controller display reading for the channel you are testing is 0 %LEL.

If the display reading is not 0 %LEL, set the zero reading of the transmitter as 
described in “Start Up” on page 7, then continue this procedure.

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.

3.

Unscrew and remove the junction box cover.

4.

Set a voltmeter to read in the millivolt (mV) range.

5.

Plug the voltmeter leads into the test points on the amplifier. Plug the positive lead 
into the red (+) test point; plug the negative lead into the black (-) test point.

www.

.com

[email protected]

1.800.561.8187

Summary of Contents for 65-2405RK-05

Page 1: ...65 2405RK 05 Combustible Gas Transmitter Operator s Manual Part Number 71 0180RK Revision 0 Released 2 16 11 www com information itm com 1 800 561 8187...

Page 2: ...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 type of use you have...

Page 3: ...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 EXPRESSED OR IMPLIED...

Page 4: ...bustible Gas Transmitter 5 Startup 7 Introducing Incoming Power 7 Setting the Zero Signal 7 Maintenance 8 Preventive Maintenance 8 Troubleshooting 9 Replacing Components of the Combustible Gas Transmi...

Page 5: ...ion instructions WARNING When using the 65 2405RK 05 you must follow the instructions and warnings in this manual to assure proper and safe operation of the 65 2405RK 05 and to minimize the risk of pe...

Page 6: ...ntains any sparks which may occur within the detector The 1 2 inch NPT mounting threads at the top of the detector allow you to mount it into the bottom conduit hub of the junction box A flame arresto...

Page 7: ...Zero Pot The zero pot is located in the upper left corner of the amplifier see Figure 1 Use a small flat blade screwdriver to turn the zero pot s adjustment screw and adjust the amplifier s zero fres...

Page 8: ...you select the mounting site Select a site where the transmitter is not likely to be bumped or disturbed Make sure there is sufficient room to perform start up maintenance and calibration procedures...

Page 9: ...three wires in conduit through the top conduit hub of the junction box 7 Pull out the controller terminal strip and connect the three wires to the terminal strip as follows see Figure 3 Connect the p...

Page 10: ...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 Amplifier Transmitter Black Cable Shield Controlle...

Page 11: ...ver tightly closed during operation CAUTION If you suspect the presence of combustible gas in the monitoring environment use the calibration kit and the zero air calibration cylinder to introduce fres...

Page 12: ...alarms before performing this test 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 cal...

Page 13: ...tion on page 13 of this manual 3 Turn the regulator s on off knob clockwise to close the regulator 4 Unscrew the regulator from the calibration cylinder 5 Unscrew the calibration cup from the detector...

Page 14: ...itter is malfunctioning 1 Verify that the transmitter wiring is correct and secure 2 Calibrate the transmitter 3 If the fail condition continues replace the detector 4 If the fail condition continues...

Page 15: ...e 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 Place the new amp...

Page 16: ...on frequency of every 3 months If an application is not very demanding for example detection in a clean temperature controlled environment where combustible gas is not normally present and calibration...

Page 17: ...non hazardous Keep the junction box cover tightly closed during operation 1 Unscrew and remove the junction box cover 2 Set a voltmeter to measure in the millivolt mV range 3 Plug the voltmeter leads...

Page 18: ...verify that the reading matches the response reading 2 mV you determined earlier If necessary use the span pot on the amplifier to adjust the reading to match the correct response reading 4 Turn the r...

Page 19: ...K 01 Steel calibration cylinder 50 LEL hydrogen in air 34 liter 81 0007RK 01 Steel calibration cylinder 15 LEL hexane in air 34 liter 81 0012RK 01 Steel calibration cylinder 50 LEL methane in air 34 l...

Reviews: