Safety Precautions - Igm402 Service And Operation - Instrutech The Hornet IGM402 User Manual

Instruction Manual
Due to the possibility of corrosion when used in certain environmental conditions, it is possible that the
product's safety could be compromised over time. It is important that the product be periodically inspected for
sound electrical connections and equipment grounding. Do not use if the equipment grounding or electrical
insulation has been compromised.

Safety Precautions - IGM402 service and operation

2.2
Ensure the IGM402 is properly connected to earth ground.
Do not turn on filaments and try to activate the sensor when pressure exceeds 1.00 x 10
operating at the 4 mA emission current setting.
Do not turn on the filaments and try to activate the sensor when pressure exceeds 5.00 x 10
operating at the 100 µA emission current setting.
Ensure vacuum level is at or less than 5.00 x 10
WARNING! The power supply used in the IGM402 hot cathode gauge module is subject to high voltages
which could cause severe injury or death. In order to prevent electric shock and bodily harm, the user should
wait 5 minutes after power is removed before touching the IGM402 power supply components.
WARNING! When the IGM402 is turned on, 180 V is present at the power supply and other components
such as the ion gauge and the cable. Furthermore, voltages as high as 350 V are present during degas. DO NOT
operate the IGM402 with the IGM402 enclosure removed. Contact with exposed electrical circuits in the
IGM402 could result in death or serious injury.
NOTICE
Do not use another gauge to automatically turn off the ion gauge when the ion gauge filament
in use is constructed of tungsten (yttria coated filament is ok). The response time of other gauges may not
allow for timely turn off of the tungsten filament leading to filament damage. Always turn off the IG filament
manually before pressure is to rise above 1.00 x 10
When using yttria coated filaments, it is highly recommended to periodically alternate operating Filaments 1
and 2. An inactive filament not operating for an extended length of time may result in that filament failing to
establish emission current when it is eventually used. This will be more problematic in dirty applications.
Use an appropriate power source of 20 to 28 Vdc, 30 W min. (InstruTech PS501 power supply is rated 60 W).
Turn off power to the unit before attempting to service the module. Turn off power to the unit before
detaching the electronics from the sensor for sensor replacement or bake-out purposes.
Turn off power to the unit if a cable or plug is damaged or the product is not operating normally according to
this instruction manual.
InstruTech
-5
Torr before attempting to initiate degas.
-3
Torr.
IGM402 Hornet
-3
Torr if the device is
-2
Torr if the device is
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