Vega D81 METEC Hydrostatic pressure transmitter Bedienungsanleitung PDF herunterladen (Seite 25)

Pressure transmitter D81 METEC

Setup

Adjustment

For adjustment of zero and span, an amme-

ter must be connected to terminals 1 and 3.

The measured value is identical to the output

current.

1 Adjustment of zero

(e.g. process pressure zero or empty

vessel)

• Set rotary switch to zero.

• By pushing the "+" and "–" keys simultane-

ously, the current jumps directly to 4 mA or

you can adjust a current of 4 mA with the

"+" and "–" keys.

Adjustment range of zero:

-20 % … +95 % of nominal measuring range

(corresponds to a turn up of up to +95 %)

2 Adjustment of span

(e.g. process pressure or level at maximum)

• Set rotary switch to span.

• By pushing the "+" and "–" keys simultane-

ously, the current jumps directly to 20 mA

or you can adjust a current of 20 mA with

the "+" and "–" keys.

Adjustment range of span:

3.3 % … 120 % of nominal measuring range

(corresponds to a turn down 1 : 30)

Note:

- A modification of zero does not influence

the span, i.e. the measuring range final

value is simply shifted.

- It is also possible to adjust current for

partial fillings and partial pressures, e.g.

8 mA for 25 % and 16 mA for 75 %. The

pressure transmitter then automatically

calculates the values for 0 % or 100 %

(only possible with a level difference

≥ 3.3 %).

Integration time

An integration time t

of 0 … 10 s can be ad-

justed to damp pressure shocks.

Procedure

• Set rotary switch to t

• By pushing the "-" key 10 times, make sure

that the integration time is set to 0 s.

• For each 1 s of requested integration time,

the "+" key has to be pushed once.

Bedieneinsatz

operating unit

43215

12V...36V DC

4...20mA

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 43 44

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