61-1020/61-0230 Molecular Property Spectrometer
Start Up
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11
Start Up
This section describes procedures to start up the combustible gas detector and place the detector
into normal operation.
NOTE:
The detector must be started up in the background gas it will operate in (i.e. fresh air or
N
2
).
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the controller
operator’s manual.
3. Turn on or plug in power to the controller, then turn on the controller.
4. Verify that the controller is on and operating properly. Refer to the controller operator’s
manual.
5. Allow the combustible detector to warm up for 2 minutes before setting the zero reading.
WARNING: Do not expose the sensor to combustible gas during the 2 minute warmup
period. Exposing the sensor to gas during this period will result in a failure
condition.
Setting the Zero Reading
CAUTION:
If you suspect the presence of combustible gas in the monitoring environment, use a
zero air calibration cylinder to introduce “fresh air” to the detector and verify an
accurate zero reading.
1. Verify that the detector is in a fresh air environment (environment known to be free of
combustible and toxic gases and of normal oxygen content, 20.9%).
NOTE: This manual assumes the MPS sensor is operating in a background of
fresh air. If the MPS sensor is not operating in a fresh air background,
consult RKI Instruments Inc. before zeroing the sensor.
2. Verify a reading of 0% LEL at the controller. If the display reading is 0% LEL, start up is
complete. The combustible detector is in normal operation.
If the display reading is not 0% LEL, continue to the next step.
3. Perform a zeroing operation at the controller. See the controller operator’s manual for
directions.
