Crowcon Gas-Pro - Page 27

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2.5.5.6 PID
PID sensors are congured and calibrated to Isobutylene when manufactured.
The PID sensor can be congured to detect Volatile Organic Compounds (VOC) other than
Isobutylene by changing the correction factor in the PID sensor type options
Details of how to change the VOC correction factor can be found in Portables Pro user manual
Gas-Pro tted with a PID sensor may require periodic cleaning and calibration of the sensor to
ensure correct performance in normal use.
The sensor may need maintenance if any of the following occur:
• The baseline is climbing after zeroing the sensor
• The sensor becomes sensitive to humidity
• The baseline is unstable or shifts when the sensor is moved
• Sensitivity of the sensor has dropped
Please refer to Crowcon application note PID-AN-001 for further details on maintenance and
cleaning of the PID sensor.
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