Calibration - Endress+Hauser nivotester FTC 422 Montage- Und Betriebsanleitung

Calibration

Fig. 8
Calibration controls of
Nivotester FTC 422
Calibration controls
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3. Calibration
The calibration controls are located behind the front panel and can
be accessed as follows:
• Insert a screwdriver blade into the front panel release points, see
Fig. 3, and prise forward.
• Pull the panel gently forward.
• On completion of the calibration, press the panel into position
again.
Fig 8 shows the calibration controls for the Nivotester FTC 422:
Adjuster 1:
Switch point
Adjuster 2:
Switching delay
• Hook switch 1 matches the Nivotester to the capacitance of the
vessel for the upper switch point, see Table 2.
• Hook switch 3, controls a switching differential circuit, giving a
lower switch point. The ranges are identical to switch 1, see
Table 3.
• Hook switch 2 selects the adjustment mode: Table 3 summarizes
the settings.
• Adjuster 1 sets the switch point for the maximum or minimum
level.
• Adjuster 2 sets the switching differential for the second switching
level.
• The green LED indicates that the unit is operational.
• The red LED indicates that the relay is energised (off) or
de-energised (lit).
Nivotester FTC 422
Green LED
Operational status
Hook switch 1 for
capacitance range
upper switch point
Hook switch 2 for
operational mode
Hook switch 2 for
capacitance range
lower switch point
Red LED
Relay status