E2638-PID
Rev 10.03.2021
Calibration and maintenance
Do not perform any maintenance operation with the power on.
Clean the device with a soft damp cloth. Do not use any abrasive cleaning agents. Do not
immerse the device in water or any cleaning media.
NOTE! Cleaning instruments and spare parts are not included in the delivery set, Please
contact your Seller for more information.
How often the PID needs maintenance?
The frequency of calibration and maintenance depends on operating conditions (VOC
concentration, humidity, dust, and oil in the air, etc).
In clean indoor air with low VOC concentration, a monthly or less frequent calibration is
recommended. When higher VOC concentrations are measured under harsh conditions,
perform calibration and maintenance more frequently.
PID needs maintenance if:
●
The baseline is climbing after you zero the PID – replace the electrode stack.
●
The PID becomes sensitive to humidity – replace electrode stack.
●
The PID cell shows signs of contamination after the lamp window has been
cleaned – replace the electrode stack.
●
The PID cell is known to have been subjected to severe contamination– replace
the electrode stack
●
The baseline is unstable or shifts when you move the PID – replace the electrode
stack
●
The sensitivity has dropped too much (note the change required when checking
●
calibration) – clean the lamp
●
The signal to noise ratio at low VOC concentrations becomes inadequate –
replace the lamp
Cleaning of the PID lamp is recommended as the first action when a PID needs
maintenance. It is recommended to recalibrate the device every time after stack
replacement or lamp cleaning.
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