ORTEC Detective-DX-100T, Руководство пользователя

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931040P / 1014 9. SPECIFICATIONS
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This is not to be confused with a vacuum leak, although both result in a degradation of the vacuum.
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instrument is powered up. These two techniques maintain the system vacuum in peak condition
during normal use. A good vacuum yields rapid cooldown, and ensures operation at the high end
of the instrument’s operating temperature range.
Over time, in any cryostat system, residual contaminants can be released from the materials
inside the evacuated cryostat by a process called outgassing.
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It has become apparent that, in
extended storage, the vacuum in our mechanically cooled identifiers may degrade to the point
that, on trying to restart, the gas load inside the cryostat is too high and the unit fails to cool. The
remedy is reasonably straightforward, if inconvenient: a “pump and bake” of the instrument is
required at an ORTEC service center. Fortunately, you can easily avoid this problem:
We strongly recommend that instruments used only occasionally be turned on once a month,
fully cooled to Ready status, and allowed to run for at least 48 hours. Doing this starts the ion
pump and activates the internal getters, ensuring that the vacuum is maintained in good
condition.
As well as maintaining the vacuum, this procedure keeps the system battery “topped up” and
also provides peace of mind that the system will cool when required.