Operation
6.5 Local operation
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
91
To display the current zero-point adjustment, proceed as follows:
1. Set mode 18.
The current zero offset appears in the display.
2. Close with the [M] button.
LO calibration
Introduction
The slope of the characteristic is changed in mode 19. This rotates the characteristic around
setting point HI.
This function replaces the zero-point calibration (mode 7) which is not permitted for absolute
pressure transmitters.
The unit in which you want to calibrate is set using the following functions:
● In mode 13, set the source of the measured value display[7] : Raw pressure value,
variable SENS.
● In mode 14, select the desired pressure unit.
Note
If you change this setting, the measurement range can be restricted to the point that the
permissible sensor limits are violated even with small pressure
changes.
To calibrate LO, proceed as follows:
1. Set mode 19.
The display shows the value of the last calibration procedure, with the appropriate unit.
2. Create the reference pressure.
3. Press the [↑] or [↓] button.
The measured value display switches to the current pressure value. Using the [↑] and [↓]
keys, you can enter the reference value starting from there.
4. Press the [↑] und [↓] buttons simultaneously for 2 seconds.
5. Save with the [M] button.
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