Service; Calibration; Troubleshooting - Operation - Instrutech Hornet User Manual

Instruction Manual
9

Service

9.1

Calibration

Every InstruTech module is calibrated prior to shipment using nitrogen. Care should be exercised when using
gases other than nitrogen (N
9.2

Troubleshooting - Operation

Indication
Display is off / blank
Readings appear very different from
expected pressure
Ion gauge cannot be turned on
Research Screen shows filament Voltage is
present but filament current stays at 0
Research Screen shows filament voltage
and filament current are present but gauge
is shutting off
Unable to initiate degas
Voltage to filament too high
Setpoint does not actuate
InstruTech, Inc.
) / air (see Section 6 titled "Using the gauge with different gases").
2
Possible Cause
No power
The connector may not be wired correctly
Sensor not in the proper location to
measure system pressure
The process gas is different from the gas
(Nitrogen) used to calibrate the IGM401
Sensor has been dropped causing
mechanical damage
The gauge sensor tube is contaminated
Leak in the vacuum system
Pressure exceeds 1.00 x 10
emission
Pressure exceeds 5.0 x 10
0.10 mA (100 µA) emission
Emission Control not functioning
Filament is open
Filament is contaminated or burned out
System pressure above 5.0 x 10
Filament contaminated or near end of its
life
Incorrect setup
Possible Solution
Check cable connections and verify that
power is being supplied
Check cable connections and verify that
power is being supplied
Ensure the sensor is located in
appropriate location
Apply gas sensitivity correction factor if
applicable or select the appropriate gas
from the IGM401 display menu
Replace the ion gauge sensor tube
Degas the sensor or replace the sensor
Re-check for leak in the system; re-check
that all metal seals are used when
operating below 1.0 x 10
3
-
Decrease pressure below required value
Torr at 4 mA
2
-
Decrease pressure below required value
Torr at
Switch to the other filament replace Ion
gauge sensor tube due to possible
filament failure or contamination
Switch to the other filament, replace
sensor or electronics
Switch to the other filament or replace
sensor
-5
Decrease pressure below the required
Torr
value
Switch to the other filament or replace
sensor
Check setpoint setup
IGM401 Hornet
7
-
Torr
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