Vega D96_D97 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 20)

20 Pressure transmitter D96/D97 (Profibus PA)

Adjustment

(only possible if "%" or "Lin%" has been cho-

sen for the PA output)

Adjustment taking the current pres-

sure into account (live adjustment)

Live adjustment comprises two steps:

1 Adjustment of zero

2 Adjustment of span

1 Adjustment of zero

(e.g. process pressure zero or vessel

empty)

Set the percentage value to 0.0 %

with the "+" or "–" key. Then push the

"OK" key.

2 Adjustment of span

(e.g. process pressure zero or vessel level

max.)

Set the percentage value to 100 %

with the "+" or "–" key. Then push the

"OK" key.

Note:

- A modification of zero does not influence

the adjusted span, i.e. the final value of the

measuring range is shifted.

- Push the "+" and "-" key simultaneously for

standard adjustment of zero/span. The

value jumps directly to 0 %/100 %.

- When pushing the "+" or "–" keys individu-

ally, the output signal remains at the last

value; it takes on the adjusted value only

after saving with the "OK" key.

- It is also possible to set values for partial

fillings or partial pressures, e.g. 25 % and

75 %. The pressure transmitter then auto-

matically calculates the values for 0 % or

100 % (only possible with a level difference

>3.3 %).

Zero

0,0

%

Span

100

%

Setup

Adjust PA output

The PA output is factory-set to "Lin%". With

this adjustment it is possible to carry out an

adjustment and a volume measurement ( to

measure the volume of a non-linear vessel,

the linearisation curve of the vessel also has

to be programmed into the D96/D97 with the

software VVO). The adjustment "%" enables a

level measurement (also with adjustment). If

only a pressure value should be outputted,

the PA output must be set to "Pressure". An

adjustment is then not possible. Move with

the arrow and "OK" key to the menu item "PA

output", choose there the requested option

with the "+" or "–" key and save with the "OK"

key.

Under "Scaling out." you can modify the

number values (min/max), the position of the

decimal point and the unit (with the "+" or "–"

key the values can be modified, with the "OK"

key the adjustments are saved).

Adjust-

ment

Calcu-

lation

Operate

0,0

skal

Output

Scaling

out.

100

%=

1000

Decimal

point

888,8

0

%=

0

Escape

PA-

output

Lin%

pres-

sure

%

Unit

0,0

%

Escape

mbar

psi

kPa

m

ft

inch

inHg

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 35 36

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