Vega D90 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 21)

Pressure transmitter D90 (Profibus PA) 21

Setup

ti

1

s

Lin.-

curve

activ

Adjustment without taking the current

pressure into account (dry adjustment)

Adjustment without pressure comprises four

steps:

1 Selection of the unit in which the adjustment

is to be carried out

2 Offset correction

3 Adjustment of zero

4 Adjustment of span

The offset correction (only in gauge pressure

mode) defines the reference positions for the

measurement. It can be carried out:

- before or after adjustment of zero and

span

- before or after installation of transmitters.

Transmitter must be unpressurised for the

offset correction!

Adjustment without pressure can be carried

out with the instrument mounted or dis-

mounted (e.g. workroom). Any ambient pres-

sure has no effect on the adjustment.

1 Selection of the unit

Choose the unit with the "+" or "–"

key. Save the selected unit with

the "OK" key.

2 Adjustment of zero

Adjust zero with the "+" or "–" key

and save with the "OK" key.

Zero

0,0

mbar

Span

100,0

mbar

4 Adjustment of span

Adjust span with the "+" or "–" key

and save with the "OK" key.

Note:

- A modification of zero does not influence

the span.

- By pushing the "+" and "–" keys, the output

current remains on the last value (only after

saving with the "OK" key will the output

current take on the adjusted value).

Evaluation

Linearisation curve

Is only displayed if a linearisation

curve has been activated with VVO.

Adjustment of the integration time

An integration time t

i

of 0 s … 50 s

can be adjusted with the "+" or "–"

key for damping of pressure

shocks. The adjusted value can be saved

with the "OK" key.

Selection of the indicated unit

Here, the unit for the measured

value display, as well as for the

display module, can be selected

(with the "+" or "–" key and the "OK"

key). If you select "scal.", the

scaled PA output value will be dis-

played (as adjusted under "Scaling

outp.").

Adjust

without

pres.

Unit

0,0

mbar

psi

kPa

inHg

Unit

0,0

skal

psi

kPa

%

m

ft

inch

mbar

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