7 - 12
Transpector XPR 3+ Operating Manual
5 Evacuate the vacuum system to a pressure of less than 7.5x10
-6
Torr
(1x10
-5
mbar) [1x10
-3
Pa] and wait at least 2 minutes.
6 While at high vacuum, press the button on the back of the gauge to adjust the
HV (high vacuum) setting. The gauge is automatically set to 1.0 V(dc) by
default. Press the button for > 5 seconds until the voltage increases to
1.9 ± 0.1 V(dc).
7 Vent the system to atmosphere (air or nitrogen) and verify that the Pirani
voltage is 10.0 ± 0.1 V(dc). Repeat the ATM adjustment if the setting at
atmosphere has changed.
8 Evacuate the system to a pressure of less than 7.5x10
-6
Torr (1x10
-5
mbar)
[1x10
-3
Pa] and wait at least 2 minutes.
9 Verify that the Pirani voltage at high vacuum is still 1.9 ± 0.1 V(dc). If the Pirani
voltage has changed, repeat the HV adjustment to read 1.9 ± 0.1 V(dc).
10 If a readjustment of the HV setting was done in step 9, repeat steps 7-10 of this
procedure until valid readings are obtained at atmosphere and high vacuum.
To Next Page
Loading...
