Agilent Technologies AGC-100, Manual

Page: 33 / 96

Vacuum Gauge Controller AGC-100
33
Contamination deposits on the electrode system of hot cathode gauges may cause
instabilities of the measurement values. The degas function facilitates cleaning of
the electrode system.
The degas process works only at pressures below 7.2×10
-6
mbar.
FRG730 gauges: The Degas function acts only upon the active filament.
Available for the following gauges:
 Pirani
(PVG)
 Pirani / Capacitance
(PCG)
 Cold cathode
(IMG)
 Cold cathode / Pirani
(FRG-70x)
 Hot ionization / Pirani
(FRG-720 / -730)
 Capacitance
(CDG)
Value
DEGAS
I
DEGAS OFF
I  Normal operation (Degas blocked)
DEGAS ON
I  Degas: The electron collection grid is
heated to ≈ 700 °C by electron
bombardment and the electrode
system is thus cleaned. Duration =
180 s.
 Start Degas. Duration of the Degas function
180 seconds (may also be aborted).
Abort Degas.

Save change and return to read mode.
Degas
Editing and saving a
parameter