VEGA VEGATRENN 149A Ex - Manual (Page 17)

17
7 Maintenance and fault rectification
VEGATRENN 149A Ex • Ex-separator for 4 … 20 mA/HART
24816-01-131025
Designation Terminal assign-
ment
Input and
output
I+
I- Measuring signal
intrinsically safe +
Measuring signal
intrinsically safe -
Measuring sig-
nal sensor circuit
"Ex-area"
VEGA-
CONNECT
HART communica-
tion sockets
HART
handheld or VE-
GACONNECT
6 Setup
6.1 Operation
There are no adjustment elements on VEGAT-
RENN 149A Ex. Via the HART communication
sockets in the front, a parameter adjustment of
the connected HART sensors can be carried
out without interrupting the measuring circuit.
The resistor (250 Ω) required for this purpose
is already integrated in VEGATRENN 149A
Ex (only in case of connection of O+H). The
adjustment is carried out via a Windows PC with
a parameter adjustment software such as e.g.
PACTware and respective DTM.
6.2 Indication of the function
The yellow LED in the front plate of VEGAT-
RENN 149A Ex lights as soon as a signal condi-
tioning instrument is connected to the output.
on
CONNECT
149A Ex
0+H
0+
0-
1
2
Abb. 13: Function indications and HART sockets
1 LED: indication of the function
2 HART communication sockets
7 Maintenance and fault
rectification
7.1 Maintenance
If the instrument is used properly, no special
maintenance is required in normal operation.
7.2 Rectify faults
Failure reasons
A maximum of reliability is ensured. Neverthel-
ess, faults can occur during operation. These
may be caused by the following, e.g.:
•
Measured value from sensor not correct
•
Voltage supply
•
Interference on the cables
Fault rectification
The first measure to be taken is to check the
input/output signal as well as the power supply.
In many cases, the causes can be determined
and faults can be quickly rectified.
24 hour service hotline
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 available to you 7 days a week
round-the-clock. Since we offer this service
world-wide, the support is only available in
the English language. The service is free of
charge, only the standard telephone costs will
be charged.
7.3 Instrument repair
If a repair is necessary, please proceed as
follows:
You can download a return form (23 KB) from
our Internet homepage www.vega.com under:
"Downloads - Forms and certificates - Repair
form".
By doing this you help us carry out the repair
quickly and without having to call back for nee-
ded information.
•
Print and fill out one form per instrument
•
Clean the instrument and pack it damage-
proof
•
Attach the completed form and, if need
be, also a safety data sheet outside on the
packaging