Agilent Technologies TwisTorr 305-IC Mode D'emploi page 211

Install this device indoors only, and do not use the pump in an environment
exposed to atmospheric agents (rain, ice, snow), dust, aggressive gases, or in
explosive environments or those with a high fire risk.
During operation, the following environmental conditions must be complied with
in order to avoid condensation:
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TwisTorr 305-IC User Manual / 87-901-058-01
maximum ambient pressure: 2 bar above atmospheric pressure
temperature: from +5 °C to +35 °C
relative humidity: 0 – 90 % (non-condensing).
Instructions for Use
Set-up
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