V
ACUUM
G
AUGE
C
ALIBRATION
Create a Sorption Pump on the next page
The vacuum gauge on the VacPrep was calibrated and tested at the factory using a 115 V, 60 Hz
electrical supply. When powered by other voltages and frequencies, the gauge must be
recalibrated.
1. Power ON the degasser.
2. Turn all VAC/GAS control knobs to the OFF position.
3. Power ON the attached vacuum pump and allow the pump to run for at least two hours.
4. Insert the small, flat-blade screwdriver (included in the accessories kit) through the opening
on the back of the degasser and into the slot on the adjustment screw.
To confirm the accuracy of the vacuum pump gauge, attach an independent gauge to
the end of the vacuum pump hose. Most good quality vacuum pumps can achieve a
vacuum of less than 10 millitorr (10 μmHg). A better vacuum may be obtained for cal-
ibration purposes by using a sorption pump.
Outside view - no need to remove cover
Inside view
5. Turn the adjustment screw to obtain a reading on the vacuum gauge that matches the
pressure level achieved by the vacuum pump.
Vacuum Gauge Calibration
VacPrep Operator Manual
061-42802-01 (Rev B) — Apr 2021
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