General Monitors 2180A - Check Points for Calibration and Operation

Model 2180A
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3.10 Check Points for Calibration and Operation
3.10.1 Frequency of Calibration
GMI recommends that the calibration be checked on each sensor at least every ninety
(90) days. If a sensor is installed where it may be subjected to splashing water, mud or
dirt accumulation, or adverse gases, more frequent calibration is recommended. The
exact frequency can vary with the severity of conditions and must be established in the
field.
3.10.2 Replacing a Sensor
When a sensor is replaced, the new sensor must be calibrated. To avoid false alarms,
GMI recommends disabling all the alarm circuits until the sensor is calibrated. For better
results, the sensor should be powered up at least 24 hours before calibration.