MKS Baratron 127A, Instruction Manual, Page: 21 / 38

Chapter Two: Installation Product Location and Requirements
13
Product Location and Requirements
Operating Environmental Requirements
•
Ambient Operating Temperature: 15
°
C to 40
°
C (59
°
F to 104
°
F)
Setup
The 127/128 transducer is designed to be mounted in any orientation and should be zeroed in that
position. It is recommended, however, that the unit be mounted with the inlet port vertically
downward as any foreign matter entering the pressure port will fall away from the diaphragm,
thereby not affecting the measurement. It is important that the unit be kept free from vibration,
as the diaphragm, when not subject to gas damping at low pressure, may become susceptible to
resonance. The 0.1 and 1 Torr Full Scale units are the most sensitive and any vibration that
exists should be isolated from the unit by the use of sponge rubber pads and a bellows coupling.
Note
Before using the Type 127/128 unit for pressure measurement, you must
zero the transducer. Refer to How To Zero the Type 127/128 Transducer,
page 19, for instructions on how to zero the unit.