Operation; Safety; Enable And Disable The Aim Gauge; Pressure Measurement - Edwards AIM-S-NW25 Instruction Manual

4

OPERATION

4.1

Safety

Do not use the AIM Gauge to measure the pressure of explosive or flammable gases or mixtures.
Never operate the AIM Gauge when it is disconnected from the vacuum system or when there are
explosive or flammable gases in the surrounding atmosphere or the vacuum system. High voltages
(up to 3kV) are generated inside the body tube of the AIM Gauge; these could cause injury to
people or could be a source of ignition.
The AIM Gauge incorporates magnets. Keep away from heart pacemakers, computers, credit cards
and any other magnetically sensitive devices.
4.2

Enable and Disable the AIM Gauge

Do not operate the AIM Gauge for long periods when the system pressure is above 1 x 10
anode pin can be damaged and the AIM Gauge can be severely contaminated.
We recommend that you only enable the gauge when the system pressure is lower than 1 x 10
disable the gauge when the system pressure is 1 x 10
If you have connected the AIM Gauge to an AGC or AGD, refer to the corresponding instruction manual for details of
how to enable (switch on) and disable (switch off) the AIM Gauge.
Otherwise, to enable (switch on) the AIM Gauge, connect pin 7 to pin 2 (or to ground). To disable (switch off) the AIM
Gauge, disconnect pin 7 from pin 2 (or from ground).
4.3

Pressure Measurement

If you connected the AIM Gauge to a Edwards AGC controller or AGD display, the pressure measured by the AIM Gauge
is shown on the display.
If you connected the signal output of the AIM Gauge to a voltmeter, convert the measured voltage to the
corresponding pressure value: refer to
If necessary, adjust the pressure reading to compensate for the RMM of the gas in your vacuum system (refer to
Section 1.3).
© Edwards Limited 2020. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WARNING
WARNING
WARNING
CAUTION
-2
mbar or higher.
Table 2.
NRA737880 Issue E
-2
mbar. If you do, the
-2
mbar and that you
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