TestEquity 101H, Руководство по эксплуатации и обслуживанию

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Chapter 3 – Operation
Page 18 TestEquity 101H Temperature/Humidity Chamber
Purge Operation
The Purge mode is enabled through the Purge button on the F4T controller.
If you are running a temperature-only profile to reduce to possibility of condensation in the
chamber and on your test sample, Purge can be turned ON or OFF within each profile step.
When using purge in a profile, we recommend you turn Purge ON during ramp down, low
temperature soak, and ramp up steps. You can turn Purge OFF during a high temperature soak
step to conserve GN
2
or the Air Drier desiccant.
Adjusting the Purge Flow
A flowmeter is located on the front panel to adjust the flow of purge gas into the
chamber. The flowmeter has a scale, calibrated in SCFM. The flow of purge gas
should be adjusted to the minimum amount required to obtain the desired drying in
the chamber for your conditions. A suggested starting setting is 1 to 2 SCFM (the
picture here shows the flowmeter adjusted for 1 SCFM. We do not recommend setting
the flowmeter higher than 3 SCFM.
Relief Vent
Excess pressure in the chamber workspace is vented through a pressure-relief check-valve which
is located behind the panel of the rear compartment. There is no need to vent this externally.