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EB 9510 EN
7-5
Start-up and configuration
7.3 Setting the local power line frequency
The local power line frequency must be entered to be able to properly filter out any distur
-
bances which are transmitted over ground wires or external power supply units. The default
power line frequency is 50 Hz.
1. Press key (in start screen) to go to the main menu.
2.
Select [Start-up| 1] with
or
key and confirm with
key.
3.
Select [Power line frequency| 1.14] with
or
key and confirm with
key.
4. Press
key and select 50 Hz or 60 Hz with
or key.
5. Press
key to confirm the setting.
7.4 Calibrating the differential pressure
c) Zero of the differential pressure
We recommend performing a zero calibration of the differential pressure after first start-up
and after changes have been made to the plant.
To set zero, the pressure in the measuring lines must be equal. To check zero, make sure that
the pressures in both measuring chambers are identical at atmospheric pressure, i.e. the sig-
nal at the terminals 31 and 32 must be 4 mA at a differential pressure of ∆p = 0 mbar (see
the 'Installation' section).
At ∆p = 0 mbar, the 0.0 % reading must be displayed.
The user level must be set to 'Specialist' for the zero calibration (see section 7.2).
Note
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