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Instruction Manual
Do not use if the unit has been dropped or the enclosure has been damaged. Contact InstruTech for return
authorization and instructions for returning the product to InstruTech for evaluation.
Use yttria coated filaments with air and inert gases such as N
available for use with gases not compatible with yttria filaments.
The most common cause of all vacuum gauge failures is contamination of the sensor. Noisy or erratic readings
and total gauge failure are possible indications of gauge contamination. Contamination can generally be
characterized as either:
A) A physical or chemical reaction of process gases with the sensor element. A different gauge may be
considered if neither yttria coated nor tungsten filament sensor materials are compatible with your
application.
B) An accumulation of material on the sensor element. In this case, performing the degas function of the
instrument may resolve the issue.
2.3 Electrical Conditions
WARNING! When high voltage is present in any vacuum system, a life threatening electrical shock hazard
may exist unless all exposed electrical conductors are maintained at earth ground potential. This applies to all
products that come in contact with the gas contained in vacuum chambers. An electrical discharge within a
gaseous environment may couple dangerous high voltage directly to any ungrounded conductor of electricity. A
person could be seriously injured or killed by coming in contact with an exposed, ungrounded electrical
conductor at high voltage potential. This condition applies to all products that may come in contact with the gas
inside the vacuum chamber (vacuum/pressure containment vessel).
2.3.1 Proper Equipment Grounding
WARNING! Hazardous voltages that could seriously injure or cause death are present in many vacuum
processes. Verify that the vacuum connection port on which the ion gauge is mounted is electrically grounded.
Consult a qualified Electrician if you are in doubt about your equipment grounding. Proper grounding of your
equipment is essential for safety as well as intended operation of the equipment. The vacuum gauge transducer
and enclosure of any control module must be connected directly to a good quality equipment earthing
conductor. Use a ground lug on the vacuum connection flange of the pressure measurement device if
necessary.
WARNING! In order to protect personnel from electric shock and bodily harm, shield all conductors
which are subject to potential high voltage electrical discharges in or around the vacuum system.
2.3.2 Electrical Interface and Control
It is the user's responsibility to ensure that the electrical signals from this product and any connections made to
external devices, for example, relays and solenoids, are used in a safe manner. Always double check the system
set-up before using any signals to automate your process. Perform a hazardous operation analysis of your
InstruTech, Inc.
, argon, etc. Optional tungsten filaments are
2
IGM401 Hornet
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Troubleshooting
