Blind Setting The Zero Point - Siemens SITRANS P300 Operating Instructions Manual

Operation
6.5 Local operation
B
C Use the <MODE> key to switch the transmitter to mode 6. To adjust the limit to 14 bar, press one
Note
If the preset measuring limits are exceeded or fallen below by more than 20% during
adjustment, the resulting current cannot be set above these limits.
With a marked elevation of the zero point, the limit point must therefore previously be
reduced such that it still lies within the permitted range after elevation of the zero point.
Setting without reference pressure
Blind setting resets the zero point to the lower sensor limit and the limit point to the upper
sensor limit.
Note
If the preset measuring limits are exceeded or fallen below by more than 20% during setting,
the setting function is not carried out and the old value is retained.
With a marked elevation of the zero point, the limit point must therefore previously be
reduced such that it still lies within the permitted range after elevation of the zero point.
See also
Unit (Page 6-33)
6.5.6.2

Blind setting the zero point

Introduction
Blind setting resets the zero point to the lower sensor limit.
6-22
In this example you create no pressure.
Use the <MODE> key to switch the transmitter to mode 5. To adjust the zero point to 2 bar, press
one of the keys <UP> or <DOWN>.
If there is 2 bar input pressure, the transmitter produces an output current of 4 mA.
of the keys <UP> or <DOWN>.
If there is 14 bar input pressure, the transmitter produces an output current of 20 mA.
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02