Calibration procedure
This calibration requires that
•
the vessel be filled to the upper switch point,
•
the vessel be emptied to the lower switch point.
Step Remarks
1
Fill the vessel to the upper switch point.
2
Select Position 1 at hook switch 2.
3
Using Adjuster 1 and hook switch 1, find the operating
range as described in »Range seeking«, see p 28.
4
Depending on the mode chosen, calibrate for minimum or
maximum fail-safe mode - see p 28.
5
Calibrate at the lower switch point
Step Remarks
1
Empty the vessel to the lower switch point.
2
Select Position 3 at hook switch 2.
3
Using Adjuster 2 and hook switch 3, find the operating
range as described in »Range seeking«, see p 28.
4
Depending on the mode chosen, calibrate for minimum or
maximum fail-safe mode - see p 28.
5
Select Position 2 at hook switch 2 - the Nivotester 422 is
ready for operation.
- Check that the system functions correctly.
Switch position
Range
Input voltage
Capacitance
I
3
…
6.6 V
10
…
120 pF
II
6
…
8.8 V
110
…
350 pF
III
8
…
12 V
300
…
1200 pF
Table 2
Capacitance value as a function of
hook switch 1 + 3 position
Setting
Position
Remarks
1
Adjust upper switch point
2
Operating position
3
Adjust lower switch point
Table 3
Function of hook switch 2
Calibration at lower switch
point
Calibration at upper switch
point
The calibration can also be
started at the lower switch point
Calibration
27
