MKS Stabil-Ion 370 Series, Инструкция по эксплуатации, Страница: 71 / 122

4 Preparing the Stabil-Ion System for Operation
4-13
Series 370 Stabil-Ion Instruction Manual - 370119
4. Press the SELECT key so that the time (in minutes) is flashing.
5. Press the
▲
or
▼
arrow keys to select the desired degas time
(1 – 30 minutes).
6. Press the SELECT key to store the new setting in memory.
7. Press CANCEL to return to the setup menu.
(Or press CANCEL again to return to the status display for the gauge tube
that is turned ON.)
4.3.4.3 Overpressure Threshold
This control is factory set so the ion gauge will shut down when the pressure rises above the
overpressure setpoint pressures shown in Table 4-3 on page 4-7. The pressure in Table 4-3
corresponds to 100% of the overpressure threshold, and cannot be increased beyond this point.
Selecting a lower percent value will cause the ion gauge to turn OFF at a lower pressure (e.g. 10%
is one decade lower in pressure.) This adjustment affects both pressure ranges and both IG’s
simultaneously.
The default factory setting for this function is 100%.
See Table 4-3 on page 4-7 for factory shutoff pressures and Section 7.9 on page 7-8 for a more
detailed discussion of shutdown pressure limits.
1. Press the
▼
arrow key until you see the setup menu.
2. Press the SELECT key to see the units display.
3. Press the
▼
key until you see the overpressure threshold display.
4. Press the SELECT key again so that the overpressure percent is flashing.
5. Press the
▲
or
▼
arrow keys to select the desired overpressure threshold
percentage.
6. Press the SELECT key to store the new setting in memory.
7. Press CANCEL to return to the setup menu.
(Or press CANCEL again to return to the status display for the gauge tube
that is turned ON.)
DEGAS
TIME
10
DEGAS
TIME
15
DEGAS
TIME
15
Setup
Menu
Setup
Menu
UNITS
TORR
OVP. THLD
100%
OVP. THLD
100%
OVP. THLD
90%
OVP. THLD
90%
Setup
Menu