Siemens SITRANS P Instruções de Operação Página 77

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Procedure
In the default setting, the device is in the measured value display.
To adjust the operating functions, proceed as follows:
1.
Loosen both the screws of the keyboard cover and lift it upwards.
2. Keep pressing the [M] button until the desired mode is displayed.
3. Keep pressing the [↑] or [↓] button until the desired value is displayed.
4. Press the [M] button.
Now you have saved the values and the device goes to the next mode.
5. Close the keyboard cover using the two screws.
Note
The setting is saved and the measured values are automatically displayed again if more
than two minutes have passed after a button was pressed for the last time.
See also
Releasing key lock or function lock
(Page 91)
6.5.3 Start of scale value/full scale value
6.5.3.1 Difference between setting and adjusting
Introduction
In "Pressure" measuring mode, you can set or adjust the start of scale value and full scale
value using the buttons. Modes 2 and 3 are used for this. Rising and falling characteristic
curves can be realized with appropriate use of the buttons. If the transmitter is not in "Pressure"
measuring mode, this mode is skipped in local operation.
Difference
The difference between setting and adjusting lies in the calculation.
Setting with reference pressure
Condition
Two reference pressures p
r1
and p
r2
are available. The reference pressures are initialized by
the process or generated by a pressure sensor.
When setting, a desired start of scale value or a full scale value is allocated to the standard
current values (4 mA or 20 mA). After setting, the span given on the nameplate may no longer
correspond to the setting.
Operation
6.5 Local operation
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 75
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