BUCHI Interface I-100 - Manual (Page 27)

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Operation Manual Interface I­100 27/42
6.3.2 Simple calibration (without temperature compensation)
This calibration method is used to adjust the linearity of the pressure sensor at specific
predefined pressure levels. During the calibration sequence the pressure sensor is
calibrated at room temperature in six stages at normal atmospheric pressure and at
800, 600, 400, 200 and 10 mbar.
NOTE
This calibration process may only be carried out by authorized service technicians.
During the calibration sequence, the system carries out a plausibility check on the
measured readings and indicates a fault if the confirmed readings are implausible.
u Connect the reference pressure gauge to the same vacuum system that the pump
and interface unit are connected to.
u On the calibration menu, select the option Simple pressure calibration.
Fig. 18: Menu > Pressure sensor calibration > Simple pressure calibration
u Using the arrow buttons, adjust the specified reference pressure to the figure
shown on the reference pressure gauge and press OK to confirm.
u Press the Next button.
u Using the P↑ and P↓ buttons, increase/decrease the vacuum in the system until the
pressure shown on the reference gauge is within ±10 mbar of the specified setting.
u Repeat the last three steps for each of the pressure levels listed above.
u On completion of the last step, press OK to confirm the calibration.
The calibration settings are saved and the display reverts to the default screen.