Replacing components of the h, S detector – RKI Instruments 65-2615RK-05-04 User Manual
Page 40
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65-2615RK-05-04 M2 Transmitter Operator’s Manual
Response Time” on page 32.
5.
Turn the regulator knob clockwise to close it.
6.
Unscrew the calibration gas cylinder from the fixed flow regulator. The M2 will
continue to display the maximum gas response on the display and retain the response
level in its memory.
7.
Adjust the gas reading up or down to match the calibration gas cylinder concentration
by using the UP/YES and DOWN/NO buttons, then press and release the ENTER
button.
8.
The M2 will perform a span operation. The display will indicate SPAN Gas PASS for
a few seconds, then indicate SPAN Gas SAVED before indicating Leaving CAL Mode
for a few seconds.
NOTE:
If the span adjustment fails, see “Troubleshooting” on page 30 for
recommended actions.
9.
The display will now alternate between the normal operation screen and the message
REMOVE CAL GAS
for 1 minute. If the calibration gas has not been removed from
the detector, remove it now to avoid unwanted alarms.
During this 1 minute period, the signal output will remain fixed at 3.5 mA and the
relays will remain in their non-alarm state to avoid unwanted alarms while the
calibration gas clears from the detector. At the end of the 1 minute period, the
REMOVE CAL GAS
message will stop appearing and the M2 will return to normal
operation.
10. Disconnect the calibration adapter/splash guard’s flexible tubing from the regulator.
NOTE:
Do not disconnect the flexible tubing from the calibration adapter/splash guard.
11. Store the components of the calibration kit in a safe place.
Replacing Components of the H
2
S Detector
This section includes a procedure to replace the H
2
S plug-in sensor and the entire detector
assembly. In most cases, it is not necessary to replace the entire detector assembly.
Replacing the Plug-In H
2
S Sensor
CAUTION: The sensor contains electrolyte which is a dilute acid. Do not disassemble the sensor
when replacing it with a new one. If sensor electrolyte comes in contact with your
skin, wash affected area thoroughly with soap and water.
1.
Turn off or unplug power to the M2.
2.
Unscrew the calibration adapter/splash guard from the detector housing cap.
3.
Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4.
Unplug and remove the H
2
S sensor with the rubber boot and spacer attached.
5.
Remove the rubber boot and spacer from the old sensor.