Vega VEGABAR 41 4 … 20 mA Bedienungsanleitung PDF herunterladen (Seite 26)

26 VEGABAR 41 (4 … 20 mA)

6 Instrument modification

6.1 Exchange of adjustment

modules

The modular construction of VEGABAR allows

retrofitting, interchange or removal of the

display module. Data previously saved (e.g.

adjustment values) are not stored in the ad-

justment module but in an EEPROM of the

sensor electronics and therefore readjust-

ment is not necessary. The connection of the

modules is made via a 4-pole plug connec-

tion.

VEGABAR

Module

without

adjustment

Module for

menu-driven

adjustment

Module for

basic

functions

Display

module

Diagnostics, Instrument modification

External

energy source

Checking pressure compensation

Open the housing of VEGABAR. The meas-

ured value must not change. However, if the

displayed value changes, compensation of

the atmospheric pressure is not ensured,

which will lead to distortion of the measured

value. Check the breather on the VEGABAR-

housing.

Checking the electrical components

Voltage

- the terminal voltage on VEGABAR must be

at least 12 V DC

Current

Current value Condition

3.8 … 20.5 mA standard range for the output

current

0 mA signal line interrupted

< 3.6 mA sensor electronics or pressure

sensor element defective

22 mA shortcircuit in the signal line,

sensor electronics or pressure

sensor element defective

~

1 2 3

+

–

–

–+

mA

Voltage Current

V

Ammeter for local

control

mA

1 2 ... 21 22 23 24 25 26 27 28

Kommentare zu diesen Handbüchern

Keine Kommentare