Calibration With A Covered Probe; Calibration With A Variable Level - Endress+Hauser nivotester FTC 4 serie Montage- Und Betriebsanleitung

Calibration

Calibration with a covered probe

This calibration is possible with a fully insulated probe or isolating
product only.
• Cover the probe to the required switch point.
Find the operational range by proceding as described in
»Capacitance range seeking« on Page 32.
If there is no bridge between terminals 12 and 13 of the Nivotester.
Step Procedure
1 Turn the adjuster switch back to zero.
2 Slowly turn the switch clockwise until the red LED lights.
3 When the exact switching position has been found, turn
the adjuster back a half-division.
4 When adjusted, check that the unit is functioning correctly
by filling or emptying the vessel.
If there is a bridge between terminals 12 and 13 of the Nivotester.
Step Procedure
1 Turn the adjuster switch back to zero.
2 Slowly turn the switch clockwise until the red LED goes out.
3 When the exact switch position has been found, turn the
adjuster back a half-division.
4 When adjusted, check that the unit is functioning correctly
by filling or emptying the vessel.

Calibration with a variable level

If it is possible to vary the level, you can also calibrate as follows:
Step Procedure
1 Find the capacitance range as described on Page 32
2 Find the exact switch point with the probe uncovered as
described on Page 32.
- Note the value of the adjuster.
3 Find the exact switch point with the probe covered as
described on Page 33 above.
- Note the value.
4 Set the adjuster to the average of the two values.
5 When adjusted, check that the unit is functioning correctly
by filling or emptying the vessel..
Capacitance range seeking
Calibration for minimum
fail-safe mode
Procedure:
Calibration for minimum
fail-safe mode with covered
probe
Calibration for maximum
fail-safe mode
Procedure:
Calibration for maximum
fail-safe mode with covered
probe
Procedure:
Calibration with a variable level
33