Purging; Pressure Testing - GE Everest Ca-Zoom 6.2 Operating Manual

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4.2

Purging

If moisture gets into the camera housing fogging may occur on lenses and windows. To eliminate
the fogging, purge the camera head by following the steps outlined below.
Pressure Test Port
1. Run system with both lights on maximum for about one hour. For best results, put the pan &
tilt in the upright position with the camera aimed vertically down.
2. Turn off the system. Remove the rear-housing cap from the camera housing. Remove the cap
from the Schrader valve on the pan & tilt.
CAUTION: Lamps and Camera Housing will be extremely Hot!
3. Using dry compressed gas such as instrument air or inert gas, purge the pan & tilt at 30 psig
through the Schrader valve for about one minute.
4. Remove front cap and light housing caps as necessary to wipe off any condensation.
5. Replace the rear cap. Pressurize the pan & tilt with 10 psig of dry inert gas.
6. Replace Schrader valve cap. This procedure may need to be repeated as necessary depend-
ing on the amount of moisture introduced to the system.

4.3 Pressure Testing

In order to insure the integrity of the camera system, it should be pressure tested at the
following times:
• Before each use under water or other liquids
• Before each use in humid or damp areas
• After re-assemble
• After lamp replacement
• After window replacement
• After camera module replacement
• After attachment of laser accessory
To pressure test the PTZ, follow these steps:
1. Locate the Schrader air valve on the pan & tilt section of the camera.
2. Remove the cap from the air valve.
3. Use dry compressed gas such as instrument air or inert gas to pressurize the unit to 10 psig.
4. Replace the air valve cap and tighten firmly.
5. Completely submerge the unit in water. The camera cable can be on or off.
6. If the unit is not completely sealed, air bubbles will form on the outside of the camera housing
within a few minutes.
7. Pan & Tilt camera housing through the full range of motion to check for dynamic seals.
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Everest Ca-Zoom 6.2