System Requirements
Chapter Two: Installation
30
System Requirements
Pressure Transducer Selection
Refer to the description of each transducer board in Inside the Type 146 Unit, page 47, such as
connector pinouts.
Any capacitance manometer that delivers up to ±10 Volts full scale can be used with the
146 unit. However, be aware that if a capacitance manometer which delivers less than
±10 Volts full scale is used, some sensor conditions such as overrange and underrange will not
be detected.
The Pirani-type gauges that are compatible with the 146 unit are the HPS Pirani gauge, HPS
Convection Enhanced Pirani (CEP) gauge, and the Granville Phillips Convectron
®
gauge.
The HPS inverted magnetron cold cathode gauge is compatible.
All Bayard-Alpert hot cathode gauges are supported. This includes both the thoriated iridium
and tungsten filament gauges in nude or glass envelope configuration (where available), and the
HPS low power, nude, Bayard-Alpert hot cathode.
Note
Use of a hot cathode gauge with a glass tube (or envelope) voids the CE
compliance. Only hot cathode gauges with nude tubes pass CE testing.
Valve Selection
The control valve may be either a proportional current driven valve, or a voltage driven throttle
valve. Many valve types may be used as long as proper cabling is employed.
Mass Flow Controller Selection
All MKS mass flow controllers, and equivalent controllers, are supported.
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