VEGA VEGAMET 407 AFT User Manual

Page 6

VEGAMET 407 AF/AFT

Feed supply voltage. The voltage must comply
with the figure stated on the wiring diagram.

Adjust changeover switch on the back of the
instrument or on the front plate to the desired
current output range 0 … 20 mA or 4 … 20 mA

turn potentiometer for integration time complete-
ly anti-clockwise

potentiometer for full adjustment must be turned
clockwise by 22 turns

Carry out adjustment as follows

Adjustment

The full or empty adjustment is carried out by a
spindle potentiometer. Overwinding is avoided by
the slide clutch. In practice three different methods
are possible for empty / full adjustment:

a) Level in the vessel can be filled to the

required min. level (= 0 %) and max. level
(= 100 %)

Empty adjustment
-

Reduce product to required min. level.

Adjust with potentiometer for empty adjustment
the indication of the instrument to 0 %.

Full adjustment
-

Increase product to required max. level.

Adjust with potentiometer for full adjustment the
indication of the instrument to 100 %.

Integration time
-

Adjust potentiometer for integration time to
required value (see page 2).

b) Level in the vessel can be filled to the

required min. level (= 0 %), but only to a max.
level < 100 %

Empty adjustment
-

Reduce product to required min. level.

Adjust with potentiometer for empty adjustment
the indication of the instrument to 0 %.

Full adjustment
-

Increase product to max. possible level and
dipcheck (e.g. 80 %)

Adjust with the potentiometer for full adjustment
the indication of the instrument to the checked
value.

Integration time
-

Adjust potentiometer for integration time to
required value (see page 2).

c) Level in the vessel can only be reduced to a

min. level > 0 % and to a max. level

≤

100 %

Empty adjustment
-

Reduce product to min. possible level and
dipcheck (e.g. 20 %)

Adjust with the potentiometer for empty adjust-
ment the indication of the instrument to the
checked value.

Full adjustment
-

Increase level to max. possible level and
dipcheck (e.g. 60 %)

Calculate indication value to be adjusted:
max. level minus min. level = indicating value to
be adjusted.
in the example: 60 % - 20 % = 40 %

Set with the potentiometer for full adjustment the
indication of the instrument to the calculated
value (in the example 40 %).

Set with the potentiometer for empty adjustment
the indication of the instrument to the actual
level (max. level in the example 60 %).

Integration time
-

Adjust with potentiometer for integration time to
required value.

407 AF

100

VEGAMET

Start-up

Fixing screw

Mains control lamp

Indication instrument

Signal lamp

Potentiometer
for full adjustment

Potentiometer
for empty adjustment

Potentiometer
for integration time