12
Maintenance
Fig. 6:
Adjusting the transmitter measuring range
Evacuate the vacuum chamber to the pressure p
≤
1
·
10
-5
hPa.
Remove the rubber plugs from the "HV" / "ATM" buttons access holes.
Push the "HV" button briefly with a small pin (screw driver, Allen key or the like).
Fig. 7:
Adjusting the transmitter measuring range
Vent vacuum chamber to atmospheric pressure with air or N
2
; afterwards wait about
10 minutes.
Push the "ATM" button briefly with a small pin (screw driver, Allen key or the like).
Reinsert "HV"/"ATM" rubber plugs.
7.2
Cleaning
Ga
ug
e
VACU
U
M
"HV"
Vacuum
G
auge
VACU
U
M
"ATM"
Vacuum
WARNING
Explosion hazard
The use of volatile or combustible cleaning agents in vacuum systems can lead to ex-
plosive vapour-air mixtures.
After cleaning ventilate and let dry completely.
CAUTION
Use suitable cleaning agents!
Cleaning agents can be detrimental to health and the environment!
Adhere to the relevant regulations when using cleaning agents.
Never use propanone (e.g. acetone) or halogenated hydrocarbons for cleaning!
