Vega VEGABAR 61 4 … 20 mA_HART Bedienungsanleitung PDF herunterladen (Seite 50)

8 Maintenance and fault rectiﬁcation

8.1 Maintain

When

used in the correct way, no special maintenance is required in

normal operation.

In some applications, product buildup on the sensor diaphragm can

inﬂuence the measuring result. Depending on the sensor and

application, take precautions to ensure that heavy buildup, and

especially a hardening thereof, is avoided.

If necessary, clean the transmitter. Make sure that the materials are

resistant against the cleanig, see resistance list under "Services" on

www.vega.com". The appl

ication variety of VEGABAR 61 requires

special cleaning instructions for each application. Please ask the

VEGA agency serving you.

8.2 Remove interferences

The operator of the system is responsible for taken suitable measures

to remove interferences.

A maximum of reliability is ensured. Nevertheless, faults can occur

during operation. These may be caused by the following, e.g.:

l Sensor

l Process

l Power supply

l Signal processing

The ﬁrst measures to be taken are to check the output signals as well

as to evaluate the error messages via the indicating and adjustment

module. The procedure is described below. Further comprehensive

diagnostics can be carried out on a PC with the software PACTware

and the suitable DTM. In many cases, the causes can be determined

in this way and faults can be rectiﬁed.

However, should these measures not be successful, call the VEGA

service hotline in urgent cases 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.

Connect a handheld multimeter in the suitable measuring range

according to the wiring plan.

Maintenance

Cleaning

Reaction when malfunc-

tions occur

Causes of malfunction

Fault rectiﬁcation

24 hour service hotline

Checking the 4 … 20 mA

signal

50 VEGABAR 61 • 4 … 20 mA/HAR

8 Maintenance and fault rectiﬁcati

27519-EN-081209

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