Vega D84 Hydrostatic pressure transmitter Bedienungsanleitung PDF herunterladen (Seite 23)

Pressure transmitter D84 23

Setup

4 Setup

4.1 Adjustment structure

The hydrostatic pressure transmitters come

with or without adjustment capability.

After connection to the supply voltage, the

electronics carries out a self-test (approx.

2 sec.) and the current in this signal circuit

(sensors with analogue output signal) takes

on a value of > 21.6 mA.

Sensors with adjustment

(electronics version A and C)

Sensors with electronics version A deliver a

pressure-proportional current as measured

value and are not adjustable. All settings

such as adjustment, density correction etc.

are carried out via the signal conditioning

instrument. The sensors with electronics

version C come preadjusted according to the

measuring range of the sensor (factory set-

ting). In unpressurised condition, they con-

sume a current of 4 mA. With a pressure at

the measuring range final value, they con-

sume a current of 20 mA.

Sensors with adjustment insert in the

sensor (electronics version K)

The adjustment insert with selection switch

allows:

- zero adjustment

"z" = empty adjustment

- span adjustment

"s" = full adjustment

- adjustment of an integration time (time) "ti"

Adjustment in external connection hous-

ing VEGADIS 12 (electronics version L)

The adjustment insert with selection switch

(VEGADIS 12 with display) allows:

- zero adjustment

- span adjustment

- adjustment of an integration time (time)

- adjustment of a value for zero point

(empty)

- adjustment of a value for span (full)

- adjustment of the decimal point for the

displayed value

Adjustment with HART

®

handheld

(electronics version I, K and L)

The hydrostatic pressure transmitters with

electronics version I, K and L can be ad-

justed with the HART

®

handheld like other

HART

®

capable instruments. A manufacturer

specific DD (Device Description) is not nec-

essary. The sensors work with the HART

®

standard menus.

Adjustment of VEGA signal conditioning

instrument VEGAMET (electronics version

A and B)

Electronics version A delivers a non-stand-

ardised output signal to a VEGAMET with

analogue input.

Electronics version B transfers the measured

value digitally (VBUS) to a digital VEGAMET

(514V, 515V, 614V).

The signal conditioning instrument itself, as

well as the pressure transmitter, can be oper-

ated by means of the standard six-key ad-

justment field (with clear dialog text display)

on the signal conditioning instrument.

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