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300544660_002_C1
11/2016
- © Leybold
Contamination
As with any vacuum measurement device, locate and orient the transmitter where contamination is least likely to
enter the sensor.
Contamination typically causes the zero position of the transmitter to drift away from its original
value, which causes the output to shift.
Liquid and/or Dust Entry
The transmitter’s housing and electrical connector are not sealed against entry of liquids or dust, and such entry
may cause damage to the electronics. Avoid mounting this product in locations where this could occur.
Vibrations and Instant Air Inrush
The sensor can be affected by mechanical vibrations transmitted from the process chamber and piping;
transmitters with ranges of 1 Torr and below are most affected by this condition. Suitable vibration damping is
strongly recommended to minimize this effect.
Sudden venting to atmospheric conditions or inrush of gases will not cause sensor damage unless the gas
pressure exceeds the maximum overpressure specification of the product. If the transmitter is exposed to a
pressure event that exceeds the maximum overpressure specification, its sensor may experience a permanent
span and calibration shift that cannot be reversed except by replacement of the sensor.
Vacuum connections
The transmitter is available with different types of vacuum fittings. When mounting the transmitter, always ensure
that all vacuum sealing items and surfaces are clean, without damage, and free of particles. Do not touch the
vacuum flange sealing surface.
If the transmitter is contaminated with a liquid like vacuum pump oil, the sensor element is likely
permanently damaged. The transmitter cannot be cleaned using solvents.
If the transmitter will be exposed to pressures above atmospheric pressure, make sure that proper
vacuum fittings are used. Ensure that the internal system pressure is at ambient pressure
conditions before opening the vacuum system and removing any connections.
Attention
!
!
Caution
!
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