Operating instructions

Charged Aerosol Detectors
Corona Veo and Corona Veo RS
Operating Instructions Page 113
8.5 Replacing the Gas Filters
The detector filters incoming gas through two gas filters: a charcoal filter and a high-
efficiency particulate air (HEPA) filter. The gas filters are located on the right front side of the
detector (view from the front).
In the System Setup Menu, under the Date soft key, the detector indicates when the filters
should be replaced and alerts if the date has expired. Expired dates will be indicated by a
color change to red test. The gas filters are replaced as a single unit.
To replace the gas filters:
1. Stop the detector operation:
a) Turn off the mobile phase flow. Allow gas to flow for at least 5 minutes.
b) Turn off the gas flow. Wait several minutes for the detector to de-pressurize.
c) Turn off the gas supply to the detector.
d) Press the power switch on the detector rear panel to turn the detector off.
e) Disconnect the power cord from the main power receptacle of the detector.
Warning: Disconnect the detector from all power sources before
removing any panels. When the panels are removed,
dangerous electrical connections will be exposed.
Avertissement: Débranchez le détecteur de toutes les sources d'alimentation
électrique avant de retirer les panneaux. Quand les capots de
protection de l’appareil sont démontés, vous êtes exposés à
des connexions électriques sous haute tension deviennent
accessibles.
2. On the right side of the detector, loosen and remove the three screws that attach the
cover plate to the detector enclosure with the Torx® TX 10 screwdriver. The Torx
screwdriver is included in the accessories kit for the detector.
Fig. 24: Replacing the gas filters