Wika IPT-11 Bedienungsanleitung PDF herunterladen (Seite 33)

7 Maintenance and fault rectiﬁcation

7.1 Maintenance, cleaning

When the instrument is used properly, 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, the transmitter has to be cleaned. In this case, make sure

that the materials are resistant against the cleaning detergents.

7.2 Rectify malfunctions

The operator of the system is responsible for taking suitable measures

to remove interferences.

IPT-1* oﬀers maximum reliability. Nevertheless, faults can occur

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

l Sensor

l Process

l Voltage 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

this way and faults rectiﬁed.

Connect a handheld multimeter in the suitable measuring range

according to the wiring plan.

? 4 … 20 mA signal not stable

l Level ﬂuctuations

à Set the integration time via the indicating and adjustment

module or PACTware

l no atmospheric pressure compensation

à Check the pressure compensation in the housing and clean

the ﬁlter element, if necessary

Reaction when malfunc-

tions occur

Causes of malfunction

Fault rectiﬁcation

Checking the 4 … 20 mA

signal

Process pressure transmitter IPT-1* Vers. 3.0 - metalic sensor • 4 … 20 mA 33

7 Maintenance and fault rectiﬁcation

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