Endress+Hauser FEC 22 Instructions De Mise En Service page 30

4 Operation
Keys
Rotary switch
LED chain
Green LED
Table 4.1
Function of the green LED
Red LED
Table 4.2
Function of the red LED
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4.1 Operating elements
The protective cover houses two keys and a rotary switch.
Depending on the position of the rotary switch, the left key switches the individual
functions on or off or assigns values to a particular function (see Table 5.1).
Depending on the position of the rotary switch, the right key carries out the
calibrations when the probe is uncovered or covered.
The rotary switch has eight positions. The symbols on the inside of the protective
cover serve as a quick guide and are also given in Table 5.1 along with their
meanings and switch positions.
4.2 Display elements
The protective cover houses a chain of 5 LEDs. This chain shows the settings of the
instrument (see Table 5.1).
The green LED indicates stand-by.
Switching status
Green LED does not light up
Green LED lights up
The red LED indicates the switching status (seeTable 6.1/Page 36).
Switching status
Red LED does not light up
Red LED lights up
Red LED flashes
Elektronic insert FEC 22
Function
Power supply failure or switched off.
The power supply is switched on.
The instrument is on stand-by.
Function
DC version
Switching output is
Relays energised or
connected or power supply
power supply failure.
failure.
Switching output is blocked. Relays de-energised.
RESET carried out = all parameters are set to factory values.
No calibration carried out.
Instrument not operating as limit switch.
AC version
Endress+Hauser