Maintenance & Troubleshooting 5
Maintenance & Troubleshooting
5.1Routine Maintenance
1.Calibrate the analyzer at least once each week during the first four weeks and then once every two weeks during the next eight weeks. Afterwards, the analyzer should be calibrated once a month.
2.Check the pressure of the air supply to the analyzer. Air pressure should be maintained between 70 and 80 psig.
Note: The instrument air pressure must be greater than 70 psig in order to open and close the pneumatic solenoid valves.
3.Check the sample pressure. Pressure should be maintained between 5 and 10 psig. Sample and span gas pressures should be within ±2 psig of each other.
5.1.1 Sensor Maintenance
Sensor maintenance in the 3160 is limited to replacing the sensor(s) when replace- ment is indicated. Consult the troubleshooting section for symptoms that indicate that the sensor needs replacing.
A guide to the relative life left in the cell can be found on status page 2. See “Cell Strength Factor” at the beginning of Chapter 3.0.
In units with 2 cell blocks, if sensor A fails, sensor B will not automatically switch online. This must be done manually through the Install Sensor and Test Alternate Sensor menu.
5.1.2 Scrubber Maintenance
The oxygen scrubber is a replaceable component. With normal use, the scrubber usually lasts for several years.
NOTE: Do not zero in ranges other than
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