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Installation
3.8
Checklist
Check #
1
Check all wiring and piping. Make certain all fittings are tight. Replace the top threaded cover
on the sensing unit and tighten the set screw, if provided. No operating checks or settings are
required in the sensing unit.
2
Shut off or vent the gas flow at the sampling system to make sure sample will not flow into the
analyzer during startup.
3
During calibration, it is necessary to read out the analyzer measurements. A milliammeter is
used for verification of the readings. The meter should be wired in series with the signal wire
between terminal 12 of the sensing unit and terminal 26 of the 7866 Digital Controller.
The test meter used, whether for voltage or current output, should be a digital voltmeter or a millivolt
potentiometer for best accuracy. It should have an input impedance greater than 2000 ohms.
•
Do not open the threaded cover of the sensing unit unless the power source is disconnected. Then loosen the set
screw to permit threaded cover to be turned.
Failure to comply with these instructions could result in death or serious injury.
32
7866 Triple Range Digital H
Action
and CO
Analyzer/Indicator - Operation and Maintenance
2
2
9/06
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Table of Contents
Troubleshooting
