Union Instruments CWD3000 EXP Operating Instructions Manual page 9

Technical data
NOTE
Provide sufficient buffer volume for ignition protection gas; volume is dependent
upon the switching frequency of the compressor and the possible operating time
without the compressor.
UNION recommends compressed air of class 533 as per ISO 8573-1
corresponding to solids of 40 μm (class 5)/dew point of –20°C (class 3)/oil quality
of 1 mg/m³ (class 3).
DANGER
The calorimeter may not be operated outside the specified ambient temperature
range: –10°C ≤ T ≤ 50°C.
amb
The approval is void outside this temperature range.
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