Endress+Hauser prosonic flow 92, Operating Instructions Manual

Page: 72 / 98

11 Description of device functions Prosonic Flow 92
72 EHauser
Site Setup Zeropoint Adjust
This function enables a zero point adjustment to be carried out manually.
Options:
START – MANUAL
Before carrying this out, please refer to the chapter ZERO POINT ADJUSTMENT on Page 43 for a
detailed description of the procedure for zero point adjustment.
START
Use this calibration function to perform an automatic zero point adjustment at 0.0 m/s flow velocity.
MANUAL
Use this function only if the zero point adjustment via the START function is not possible, e.g. with a flow
velocity > 0.1 m/s. The display values will be cleared and reset to 0 m/s manually.
Note:
The MANUAL setting does not perform an automatic zero point adjustment but rather allows you enter
the value for the zero point in the “Zeropoint Adjust” function numerically as a deviation of the flow veloc-
ity. See the “Site Setup - Adjustment” function on Page 72
Factory setting:
MANUAL
Site Setup Time Constant
Use this function to enter a time constant defining how the output signal reacts to severely fluctuating
measured variables, either very quickly (enter a low time constant) or with damping (enter a high time
constant).
User input:
1...99 s
Factory setting:
3 s
Site Setup Adjustment
Zeropoint Adjust Use this function to call up or change the value for manual zero point correc-
tion.
User input (Metric):
Fixed-point number –9.999...9.999 m/s
User input (US):
Fixed-point number –9.999...9.999 ft/s
Factory setting:
0.000 m/s
Span Adjust Use this function to set the span adjust.
User input:
Fixed-point number 0.00%...200.00 %
Factory setting:
100 %