5 exchanging the electronics module – VEGA VEGAFLEX 81 4 … 20 mA_HART two-wire Coax probe With SIL qualification User Manual

Page 69

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10 Diagnostics and service

VEGAFLEX 81 • 4 … 20 mA/HART two-wire

44216-EN-130823

Measurement error during emptying

Fault description

Error pattern

Cause

Rectification

7. Measured value re-

mains unchanged in

the close range during

emptying

Level

time

0

– False echo larger than the level

echo

– Level echo too small

– Eliminate false signals in the

close range

– Remove contamination on the

probe. After having removed

the source of the false signals,

the false signal suppression

must be deleted.

– Carry out a new false signal

suppression

8. Measured value re-

mains reproducible

in one position during

emptying

Level

time

0

– Stored false signals in this

position are larger than the

level echo

– Delete false signal memory

– Carry out a new false signal

suppression

Depending on the reason for the fault and the measures taken, the

steps described in chapter "Setup" must be carried out again or must

be checked for plausibility and completeness.

Should these measures not be successful, please call in urgent cases

the VEGA service hotline under the phone no. +49 1805 858550.
The hotline is also available outside normal working hours, seven

days a week around the clock.
Since we offer this service worldwide, the support is provided in

English. The service itself is free of charge, the only costs involved are

the normal call charges.

10.5 Exchanging the electronics module

If the electronics module is defective, it can be replaced by the user.

With SIL qualified instrument, only a respective electronics module

with SIL qualification must be used.
In Ex applications only one instrument and one electronics module

with respective Ex approval may be used.
If there is no electronics module available on site, the electronics

module can be ordered through the agency serving you. The electron-

ics modules are adapted to the respective sensor and differ in signal

output or voltage supply.
The new electronics module must be loaded with the default settings

of the sensor. These are the options:

In the factory

Or on site by the user

In both cases, the serial number of the sensor is needed. The serial

numbers are stated on the type label of the instrument, on the inside

of the housing as well as on the delivery note.
When loading on site, first of all the order data must be downloaded

from the Internet (see operating instructions manual "Electronics

module").

Reaction after fault recti-

fication

24 hour service hotline

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