Schmalz SMPi 20, Operating Instruction, Page: 24 / 50

S
CHMALZ
SCP
I
/ SMP
I
4-24
Zero-point adjustment (calibration) [CAL]

The vacuum circuit of the system must be ventilated to the outer atmosphere
before zero-point adjustment is made.
A zero-point adjustment is made as follows:

Press the button.

Enter a valid PIN if the menu is locked.

Press or until
[CAL]
appears in the display.

Confirm by pressing the button.
After confirmation is made, the display flashes briefly and then returns automatically to dis-
play mode.

Zero-point adjustment is only possible at an area of

3% from the final value of
the measurement range. This means that the zero point can be adjusted by up
to 30 mbar of vacuum, starting from the original zero point of the sensor.

If the permissible limit of

3% is exceeded, then the
[E3]
error code is shown in
the display.