109 Maintenance and Cleaning
Overview
EVM Series User Manual
Maintenance and Cleaning
Overview
The maintenance and cleaning chapter discusses how to care for the following items:
Care and cleaning with the PID sensor
PID cleaning kit (optional accessory, part number 074-080, see “Customer Service” or email
technical.services@tsi.com for details.)
Optical Engine: maintenance and cleaning
Impactor care
Gravimetric cassette and filter paper
PID Sensor
The following section explains basic installation, maintenance of the PID sensor,
and cleaning the lamp.
NOTE: The PID cleaning kit is sold as an accessory. For technical support,
see “Customer Service” or call TSI at 1-800-680-1220 (USA) or
(651) 490-2860.
The Photoionization detection (PID sensor) is used to measure airborne pollutants. As it is measuring
and detecting for Volatile Organic Compounds (VOCs), the gases freely diffuse in and out of the sensor
chamber which is formed by the filter, housing walls, and a UV lamp opening (window). It is important to
keep the UV lamp clean and the electrode pellet (lid placed over the lamp housing) clean.
NOTE: Regarding PID and performance: with the PID sensor and humidity sensitivity, this uses
the fence electrode technology to minimize humidity.
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