MKS Stabil-Ion 370 Series, Инструкция по эксплуатации, Страница: 66 / 122

4 Preparing the Stabil-Ion System for Operation
4-8
Series 370 Stabil-Ion Instruction Manual - 370119
5. Press the SELECT key to store the new setting in memory.
6. Press CANCEL to return to the control menu.
(Or press CANCEL again to return to the status display for the gauge tube
that is turned ON.)
4.3.3.2 Filament Selection
The filament coating, which is utilized in the Stabil-Ion Gauge to provide electron emission at
relatively low filament temperatures, has a finite operating life—typically two to three years at low
pressure. Ion bombardment at higher pressures tends to erode the coating faster than at lower
pressures. Stabil-Ion Gauges have a second independent filament for use when the first filament
finally tires and does not emit sufficiently. The Controller will automatically turn the IG OFF if the
filament has insufficient emission either due to contamination of the filament or long use. Select the
other filament for continued operation.
Set at filament
1
(or filament
2
if alternate filament is required). Separate settings are provided for
IG1 and IG2. The
Both
setting causes both filaments to light for use in harsh environments where
there is potential for filament contamination.
The factory default setting for this function is FIL 1 (for filament 1).
1. Press the
▼
arrow key until you see the control menu in the display.
2. Press the SELECT key to see the pressure range display.
3. Press the
▲
or
▼
arrow keys to see the filament select
display.
4. Press the SELECT key so that FIL 1 (or FIL 2 or Both ) is flashing.
5. Press the
▲
or
▼
arrow keys to select the desired filament.
6. Press the SELECT key to store the new setting in memory.
7. Press CANCEL to return to the control menu.
(Or press CANCEL again to return to the status display for the gauge tube
that is turned ON.)
IG1 HIGH
PRESS. RNG
Control
Menu
Control
Menu
IG1 HIGH
PRESS. RNG
IG1 LOW
PRESS. RNG
or
IG1 FIL B
FIL. SEL
IG1 FIL B
FIL. SEL
IG1 FIL 2
FIL. SEL
IG1 FIL 2
FIL. SEL
Control
Menu