FISCHER ME49F Series, Руководство по эксплуатации

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5.1 Zero point and measuring range ad-
justment
Please note that adjustments can only
be carried out in ex-free zone.
The pressure transmitters are set in the factory
before delivery so that they do not usually need to
be adjusted at the assembly site. If the output signal
does need to be adjusted, this can be undertaken
using the 'S' and 'N' potentiometers.
The potentiometers can be accessed by unscrew-
ing the lid of the housing. The unit is connected to
the power supply as shown on the wiring diagram
and also, an ammeter is connected between the
pressure transmitter and the auxiliary energy
source.
Fig. 3 Measuring switch
Fig 4 Setting potentiometer
5.2 Adjustment sequence:

Switch on auxiliary energy

Depressurize the measuring system: p = 0

Display for std. measuring ranges = 4.0 mA

In the case of any deviations, the output signal
of the pressure transmitter shown by the am-
meter can be corrected with the zero-point po-
tentiometer (N).

Set the pressure in the measuring system to
the measuring range end value (e.g. pressure
is generated by means of a manual pump and
pressure compensation unit) Display 20 mA. In
case of differences, correct by adjusting the
voltage potentiometer (S).

Then check the zero-point and measuring
range again; correct if necessary.
6 Maintenance
The instrument is maintenance-free.
We recommend checking the instrument at regular
intervals to ensure reliable operation and a long
service life.

Inspecting the output signal.

Check the leak-tightness of the pressure con-
nection lines.

Check the electrical connection (cable clamp
connections).
The precise test cycles and operating and ambient
conditions need to be adjusted. If various instru-
ment components interact, the operating instruc-
tions of all the other instruments also need to be
observed.
7 Transportation
The measuring device must be protected against
impacts. It may only be transported in packaging
specifically intended for transport.
8 Service
All defective or faulty devices should be sent direct-
ly to our repair department. We would ask you to
please coordinate all return shipments with our
sales department so that we can ensure
careful processing of all faulty devices
for our customers.
Process media residues in and
on dismantled devices can be a hazard to people,
animals and the environment. Take adequate
preventive measures. If required, the devices must
be cleaned thoroughly.
9 Accessories
Not planned
10 Waste disposal
For the sake of the environment ....
Please help to protect our environ-
ment and dispose of or recycle used instruments as
stipulated by the applicable regulations.
Auxiliary energy
Apparent ohmic resistance
Span
Zero point
Ampere meter