7 | Cleaning and servicing
BÜCHI Labortechnik AG
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Operation Manual Interface I-300 Pro
7.8.1
Offset calibration
An offset has to be specified if the pressure indicated on the interface unit differs from
the pressure indicated by an external reference pressure gauge. The difference be-
tween the two figures is referred to as the offset. The offset applies to the entire pres-
sure range.
Navigation path
➜
Configuration
➜
Servicing
➜
Pressure offset
u
Connect the reference pressure gauge to the same vacuum system that the pump
and interface unit are connected to.
u
Navigate to the "Service" screen and select the menu item "Pressure offset", see
Chapter 6.1 "Navigating the menu", page 44.
Fig. 69: Menu item "Pressure offset"
u
Enter the pressure measured by the reference sensor.
ð
The measured readings will then automatically be adjusted by the specified offset.