BUCHI Interface I-100 - Manual (Page 26)

6 | Operation BÜCHI Labortechnik AG
26/42 Operation Manual Interface I­100
6.3 Calibrating the pressure sensor
The pressure sensor is calibrated at the factory by BUCHI prior to delivery. However, it
can be recalibrated with the aid of an external reference pressure gauge at any time.
u Press the Menu button and select Pressure sensor calibration.
Fig. 16: Menu > Pressure sensor calibration
6.3.1 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.
u On the calibration menu, select the option Calibration pressure offset.
Fig. 17: Menu > Pressure sensor calibration > Calibration pressure offset
u Using the arrow buttons, set the offset and press OK to confirm.
The measured readings will then automatically be adjusted by the specified offset.
u Make sure that the reference pressure indicated on the interface unit matches the
figure shown on the external reference pressure gauge.