Siemens SITRANS P DS III - Page 93

Operation
6.5 Local operation
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
93
Procedure
To calibrate HI, proceed as follows:
1. Set mode 20.
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.
Result
If the calibration was successful, the current measurement value of the device will be
displayed, and will correspond to the calibration value as long as the reference pressure is
still applied.
If you switch to the measured value display without taking a sufficiently large calibration span
into account, the pressure status "Bad" B_004 will be displayed.
The failure logic of the function block is activated. The output has the status "Unsure" U_0xx,
depending on the setting.
If the two calibration points are too close together, status F_006 is displayed. The smallest
calibration span depends on the nominal measurement range. Select either the higher
reference pressure in mode 20, or the lower reference pressure in mode 19.
As long as mode 20 is active, you can repeat this procedure as often as necessary.
Viewing the HI calibration
To view the HI calibration, proceed as follows:
1. Set mode 20.
The display shows the value of the last calibration procedure, with the appropriate unit.
2. Leave the mode by pressing [M].
See also
Errors (Page 188)
Calibrating the sensor (Page 126)