MKS HPS 919 Series, Operation And Maintenance Manual

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Hot Cathode Ionization High Vacuum Senor System
About the HPS
®
Products Series 919
Hot Cathode Ionization System
The Series 919 Hot Cathode Ionization System, with its wide measurement
range of 10
-2 down to 10 -10 Torr, is designed for versatility, simplicity,
reliability, and value. A large, green LED display is easy to read in almost any
lighting or angle. Pressure, sensitivity, protection, and set point values are
shown in exponential notation. Other LEDs indicate filament, degas, and set
point activation status. All controls, including power, are conveniently located
on the front panel, and cable connections are hidden to the rear of the
Controller.
Standard features of the Series 919 Controller include two
nonvolatile set points for reliable system control,
remote enable for filament
and degas, and burnout
protection for the
filament. The
protection feature
guards the
Sensor's filament
against damage in
case of overpressure
or a short circuit. The
pressure at which the
filament is turned off is
adjustable.
The Controller's resistance
(I
2 R) degas conveniently
and effectively removes
adsorbed gas from the
Sensor. Unlike most other
hot cathode ionization
controllers, the Series 919
Controller displays pressure
during degas. Remote filament and degas controls
allow easy automation.
Measurements are more precise with superior electromagnetic and RF noise
shielding and very stable electronics. The specially designed Controller
electrometer provides high amplification, a stable zero point, and fast time
constants for rapidly changing measurement situations. This is especially
useful with pressure controllers.
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