Edwards APG100 User manual

D026-01-840
Issue B
Instruction Sheet
APG100 Replacement Tube and Electronic Housing Calibrating
Instructions
1Introduction
This manual provides the calibration instructions for an APG100. These instructions should be followed whenever a
replacement tube or replacement electronics housing is fitted. The replacement tube is supplied inside an empty
housing for protection during transit. Please discard this housing before use.
1.1 Replace the gauge tube or electronics housing
Referring to Figure 1:
1. Unplug the electrical cable, vent the vacuum system to atmosphere pressure and remove the gauge from the
vacuum system.
2. Pull the retaining clip from side of gauge.
3. Pull the tube from the electronics housing.
4. Fit the replacement tube into electronics housing, noting the correct alignment.
5. Refit the retaining clip.
Whenever a new tube or electronics housing is fitted it is necessary to adjust the gauge at atmosphere and at vacuum
as described below.
Figure 1 - Replacement of gauge tube
1. Electronic housing
2. Retaining clip
3. Gauge tube
IA/017/12/08

D026-01-840 Issue B
Page 2 © Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
1.2 Atmosphere adjustment
1. Switch on the power supply to the APG100.
2. With the gauge at atmospheric pressure, press the ’CAL’ button and hold it down for longer than 5 seconds. The
status LED will begin to flash red/green alternately and the gauge will automatically adjust to match the new
tube. This may take several seconds.
3. Allow the gauge to operate at atmospheric pressure for at least 10 minutes and then repeat step 2.
Figure 2 - Adjustment of APG100
1.3 Vacuum adjustment
1. Reduce the system pressure to 1 x 10-5 mbar or below.
2. Allow the gauge to operate for at least 10 minutes.
3. Press the ’CAL’ button. The status LED will flashand the gauge will automatically adjust to readvacuum.
1.4 Storage and Disposal
Please refer to the APG100 product manual originally supplied with the product. For printable copies of the HS2 form
please contact your supplier or Edwards.