KROHNE LS 72xx EN - Manual (Page 7)

02/2013 LS 72xx 7
2.1 Connection plan
2.2 Initial start-up
•
Check the leak-tightness at the sleeve.
•
Make sure that the cable gland is tight or, as the case may be, the M12 plug is properly
screwed down.
•
After powering the unit, check for correct switching function.
2.3 Operator control
External level converter module
Refer to the directions for the appropriate evaluator and set the sensitivity level accordingly.
With integrated level converter module
•
The red LED in the evaluator module lights up when the electrode is immersed in the liquid
product of adequate conductivity.
•
According to the polarity of the supply voltage (see “Electrical connection“) the output
operates in the active or inactive mode.
•
Should the module fail to switch, check the sensitivity setting (see “Electrical connection“).
3 Fault diagnosis and corrective actions
Fault Cause Action/elimination
No indication of level Electrode not in product o.k.
Measure continuity,