Level limit switch
Series RF 3000
Technical Information / Instruction manual
page
Advanced programming - Manual calibration
Manual calibration - Calibration procedure - Uncovered probe only
1. Ensure material level is well
below the probe.
Ensure that the unit is properly
mounted and the material level is
well
below the probe
, since the unit
will calibrate to an uncovered probe.
2. Set Sensitivty range
Check for the required Sensitivity range (low or high) depending on the material to be
measured, use calibration guide on page 32.
Set the Sensitivity range in the Advanced Menu item "H", see page 30.
3. Find capacitance of
uncovered probe
Goto Advanced Menu item "K".
Start with lowest capacitance (factory setting is ca. 3 pF). Unit states covered.
Increase the displayed capacitance, until the output just changes from covered to uncovered.
Notes:
- The signal output delay should be set to 0.5 sec.
- In measurement mode the actual measured capacitance is displayed. This gives an
indication, at which capacitance the output will change from covered to uncovered.
- If the output has once changed to uncovered and shall change back to covered, the value
must be decreased by the setted Hysteresis (Menu item "L").
If the actual measured capacitance is close to the limits of what the electronic can measure
(400 pF with sensitivity setting "Low" or 100 pF with sensitivity setting "High"), see Trouble
shooting, page 37.
4. Set switchpoint
covered -> uncovered
In Advanced Menu item "K".
Set the Switchpoint covered -> uncovered as follows:
Capacitance of uncovered probe (see step 3 above)
+ Increase to switchpoint (see table on page 32)
5. Hysteresis
Advanced Menu item "L".
Factory setting is normally not required to be changed.
Unit is ready to work.
Return to measurement mode.
Note: Manual calibration must be set to ON (Advanced menu, item G)
A Capacitance uncovered probe
B Increase to switchpoint
C Switchpoint covered -> uncovered
D Hysteresis
E Switchpoint uncovered -> covered
F Capacitance covered probe
Explanation of calibration procedure:
Capacitance
RFnivo
®
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RF 3000 f
gi241014
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