Ion Science Corvus - Manual (Page 20)

CORVUS MANUAL Ion Science Ltd
Page 20 of 27 Unrivalled Detection. www.ionscience.com
Maintenance
PID Sensor / Lamp cleabning and replacement
The performance of the PID sensor may deteriorate with use therefore servicing may be required to recover
performance. Performance of the PID sensor may be reduced by electrode stack contamination, lamp
window contamination. To resolve these issues the PID sensor will need to be removed from the Corvus
instrument.
To gain access to the PID sensor use the Corvus setting tool to lift the
sensor lid. Insert the tool through one of the side holes in the lid and
lever the lid from the housing. The Corvus setting tool is part of the
accessory pack (Part Number: A-877206) sold separately to the Corvus
instrument.
The PID sensor is removed by unplugging it.
To remove the electrode stack, locate the ‘prongs’ of the electrode
stack removal tool (Part Number: 846216) in to the slots in the side of
the Mini PID Sensor body. Squeeze the sides of the tool until the clips
in the side of the electrode stack are released. Place a finger over the
electrode stack to restrict movement as the electrode stack and lamp
are spring loaded.
Remove the electrode stack and withdraw the lamp from the PID body.
IMPORTANT: Do not touch the lamp window with fingers as this will significantly reduce the PID output.
Inspect the electrode stack for signs of contamination. Contamination may present itself as blemishes,
discoloration or corrosion on the surface of the metal electrodes. The electrode stack should be replaced if it
appears contaminated of performance is reduced.
Lamp Cleaning
The Corvus PID relies on an ultraviolet light source ionising VOC gases as they pass across the lamp
window. This process may result in a very fine layer of contamination appearing on the detector window that
must be removed on a regular basis.
CAUTION!
The Corvus is a sensitive detector. Internal components must be handled with clean hands and
clean tools. The Corvus lamp is fragile. Handle with care.