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Start Up
35-3010RKA-04H Sample-Draw Detector Head
Start Up
This section describes procedures to start up the sample-draw detector and place the sample-draw
detector into normal operation.
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. See controller operator’s
manual.
3. Turn on or plug in the incoming power at the controller, then turn on the controller.
4. Verify that the controller is on and operating properly.
5. Verify that the Pilot light is on at the sample draw detector.
6. Verify that the flowmeter indicates a flow rate of approximately 1.2 SCFH. If necessary, use
the bypass valve or flow adjust potentiometer to adjust the flow rate.
NOTE:
The following step tests for leaks in the sample line. This test may cause a
low flow condition at the sample-draw detector.
7. Verify that the incoming sample line is not leaking. To test the sample line, plug the open end
of the sample line with your thumb. If the flowmeter ball drops to the bottom of the
flowmeter, the incoming sample line is not leaking.
8. Remove your thumb from the sample line, press the pump reset switch, and verify the
flowmeter returns to a normal flow rate.
Setting the Zero Reading
CAUTION:
If you suspect the presence of hydrogen, carbon monoxide, or an abnormal oxygen
condition (not 20.9%) in the monitoring environment, use the calibration kit and the
zero air calibration cylinder to introduce “fresh air” to the sample draw adapter
and verify an accurate zero setting.
1. Verify that the sample-draw detector is sampling a fresh air environment (environment known
to be free of hydrogen and of normal oxygen content, 20.9%).
2. Open the housing door.
3. Set a voltmeter to measure in the millivolt (mV) range.
