Endress+Hauser Proline Prosonic Flow 90 Operating Instructions Manual page 71

Proline Prosonic Flow 90
Endress+Hauser
Performing a zero point adjustment
1. Operate the system until normal operating conditions resume.
2. Stop the flow (v = 0 m/s).
3. Check the shut-off valves for leaks.
4. Check that operating pressure is correct.
5. Using the local display, select the "ZERO POINT ADJUSTMENT" function in the function
matrix:
HOME → F → R → PROCESS PARAMETER
PROCESS PARAMETER → F → R → ZERO POINT ADJ.
When you press OS you are automatically prompted to enter the code if the function matrix
6.
is still disabled. Enter the code.
Use OS to select START and press F to confirm.
7.
Select YES at the prompt and press F again to confirm. Zero point adjustment now starts.
– The message "ZEROPOINT ADJUST RUNNING" appears on the display for 30...60 seconds
while adjustment is in progress.
– If the fluid velocity in the pipe exceeds 0.1 m/s, the following error message appears on the
display: ZERO ADJUST NOT POSSIBLE.
– When the zero point adjustment is completed, the "ZERO ADJUST." function reappears on
the display.
8. Back to the HOME position
– Press and hold down the Esc key (
– Repeatedly press and release the Esc key (
X
) for longer than three seconds.
X
).
6 Commissioning
71