Endress+Hauser FEC 12, Руководство по эксплуатации

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3 Operating Elements
This Section describes the operating elements of the electronic insert. It also
describes the menu structure of the HART protocol used with the Universal HART
Communicator DXR 275.
3.1 FEC 12 Electronic Insert
The operating elements of the electronic insert are protected by a cover. This can be
raised by inserting a small screwdriver into a slit at the edge. The inside of the cover
has symbols printed on it that serve as a quick operating manual.
Switches The lefthand switch selects whether the linearisation is to be carried out remotely with
the handheld terminal or locally with the FEC 12 operating elements. If linearisation at
the FEC 12 is required, then one of two stored linearisation modes in the electronic
insert is activated (vertical vessel with linear characteristics or horizontal cylinder) at
the righthand switch.
Pushbuttons Calibration, locking and reset to factory-set values are carried out at the FEC 12 by
using the four pushbuttons (see Section 4).
Basic Operation:
The pushbuttons marked with (+) increase current and those marked (-) decrease
current. Punching the pushbuttons produces a step-wise change. The smallest
resolution possible is 0.014 mA. If the pushbutton is pressed continuously, then the
current also changes continuously until the pushbutton is released. The change
begins slowly and gradually increases in speed and so quickly passes through a
wide range. Just before reaching the value required, the pushbutton should be
released and the procedure completed by punching the pushbutton for fine
resolution. If the value required is overrun, then correct for it by pressing the
pushbutton for the other direction.
1
4...20 mA
2
3 4
5
FEC 12
✔
✔
pushbuttons,
e.g. for empty
calibration
switch for
selecting local
or remote
linearisation
switch for
the type of
linearisation
pushbuttons,
e.g. for
full calibration
green LED:
indicates
successful
calibration
connection for
ammeter
lid with short instructions
Fig. 6
Operating elements on the
FEC 12 electronic insert
3 Operating Elements Electronic insert FEC 12 (HART)
6 Hauser