Agilent Technologies XGS-600, Instruction Manual, Page: 34 / 90

XGS-600 Gauge Controller
34
DRAFT 4/
15/14
AUTO-ON IF GAUGE This field is active for HFIG and IMG gauges only. Use this field
along with < (is less than) to select a Convection, Active or CDG
gauge and assign a pressure level below which AUTO-ON
engages.
When Auto-On is activated, you cannot manually turn on or off the
ion gauge; it is controlled by the assigned convection gauge.
Select
- - -
to deactivate Auto On.
< (is less than) Use this field with Auto-ON to enter pressure (max allowed 1T) at
which to trigger the ion gauge. There is a hysteresis of 5mT built in
to the software to prevent fluctuating ion gauge emission from trig-
gering on/off. For example, if this field is set to 3E-3T, Auto-ON
turns on the ion gauge at 3E-3T and off at 8E-3T.
ANALOG OUTPUT Use this field to select either the FAST or SLOW analog output.
Select:
❑
FAST and the output is updated every 10 msec.
❑
SLOW and the update is every 250 msec.
The default setting is FAST for the IMGs, SLOW for hot filament and
rough gauges.
SENSITIVITY This field is active for HFIG and IMG gauges only. Use this field to
raise or lower the sensitivity.
EMIS CURRENT (mA) This field is active for HFIG gauges only. Use this field to configure
the EMIS Current. See Table 3-1 on page 33 for sensor default val-
ues.
NOTE
Changing the Sensor Model, defaults Sensitivity and Emission
Current settings.
Use this to calibrate full scale CDG readings or to scale
readings.
GAS CORRECTION (HFIG and IMG gauges) Use this field to enter a correction for vari-
ous gas types. For an ion gauge, enter a nominal value from
Appendix D “Gas Correction Factor Table”.
GAS TYPE (Convection gauges) Use this field to enter a gas type by name.
Select
Air , Argon or Helium (“Helium Measurement Capability” on
page 36).
CDG FULL SCALE Sets the full scale reading for the CDG display.
SYSTEM SETUP Select to open the System Setup screen (page 37).
EXIT Select to return to the Main Screen (page 25).