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Instruction Manual
RESEARCH
This mode displays the measured pressure, emission current, ion current, filament voltage and filament
current. In the following example, the measured pressure is 1.00E-9 Torr, (Pressure unit is based on
selected units in SETUP UNIT menu). Emission current is 4.00E-3 amperes, Ion current is 4.00E-11 amperes,
filament voltage is 1.5 Vdc and filament current is 1.9 amperes.
Emission current value(A)
Ion current value (A)
-FLIP SCREEN [Factory default = NORMAL]
This allows the user to select a NORMAL display or have the pressure measurement data displayed upside
down. When the IGM401 is mounted upside down, this selection is used to invert the display screen 180
degrees for user convenience. Note - When UPSIDE DOWN is selected, the user has to save the setting and
exit the menu before the measured values are displayed.
5.8.2 SETUP UNIT
- UNITS [Factory default = TORR]
Select from TORR, mBAR or PASCAL. Units selected are used for all other settings.
- DEFAULTS [Factory default =MENU TO EXIT]
The module can be returned to the original factory settings by using the ENTER Key to set factory defaults.
Note - You must re-enter the actual sensor SENSITIVITY value marked on the sensor and reprogram other
parameters as required.
- GAS TYPE [Factory default = N2]
Use the UP and DOWN Keys to select from a table of 16 commonly used gases. Gas choices are:
N
, Air, O
, CO, H
O, NO, Ar, CO
2
2
2
CAUTION! If you intend to use nitrogen as the default gas setting even though the gas in use is not
nitrogen, you can select N
to the displayed measurement and outputs (Refer to
- CLR IG ERROR [Factory default = OFF]
When the IGM401 ionization gauge (IG) experiences an error condition such as OVERPRESSURE, emission
failure, etc.,
the ion gauge filament will turn off and the module will stop measuring pressure.
InstruTech, Inc.
Negative Exponent
PT= 1.00E-9
IE= 4.00E-3
IC= 4.00E-11
FVI 1.5 1.9
, Kr, SF
, Xe, Hg, He, Ne, D
2
6
from the menu, but you must manually apply a gas sensitivity correction factor
2
Measured Pressure
Filament Voltage (Vdc)
Filament current
(amperes)
, and H
.
2
2
section 6
titled "Using the gauge with different gases").
IGM401 Hornet
Error messages will
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Table of Contents
Troubleshooting
