Installation Process
5.
Turn on the purge supply, watch the indicators and begin timing
when the Purging indicator turns yellow.
6.
Verify that power remains off while the enclosure is purging.
7.
Continue timing until power is applied to the instrument.
Verify that the instrument powers on and that the time is at or in
excess of the minimum purge time listed on the purge specifications
label (a tolerance of +20% is acceptable), continue on to verify the
leakage compensation valve operation.
If the time is less than the minimum purge time, contact technical
support.
Fine-tuning
leakage compensation
After power has been applied, the purging valve closes and air flow into the
enclosure is controlled by the leakage compensation valve. Setting an
appropriate working pressure saves purge gas. .
The leakage compensation valve may need to be adjusted if:
•
the enclosure is modified
•
gland plates are added or replaced
•
changes are made to the purge system
•
the enclosure cannot maintain pressure
•
air is constantly flowing through the relief valve
•
the purging indicator cycles rapidly.
To adjust the valve:
1.
If you have not already done so, turn on the purge supply and wait
for the enclosure to pressurize and power to come on.
2.
Check the air flow through the relief valve.
If air is constantly flowing,
the leakage compensation valve is open too
far. Continue to step 3 to adjust the valve.
46
Antaris EX Safety, Installation, and Site Preparation Guide
Thermo Fisher Scientific
