Siemens SITRANS F Mode D'emploi page 42

Troubleshooting
4.1 Troubleshooting
Error or Message
- - -F- - - Fault Alarm
Re-space Index
Invalid Setup (use Direct Mode)
40
Probable Cause
Loss of signal strength (ALC)
•
Change of Rx signal location (Beam
•
Blowing)
The measured liquid sonic velocity (Vs)
is more than +/- 25% of the average Vs
range.
During the Initial Makeup the system
detects invalid sensor spacing,
erroneous liquid or pipe parameters, or
some other factor that prevents it from
completing the Initial Makeup.
Solution
Recouple sensors with fresh
•
couplant.
Install sensors in Direct mount
•
mode.
Note: If problem persists call Tech
•
support.
Ensure proper pipe dimensions
•
and/or Liquid data entries are
correct.
Properly enter correct Sensor Size
•
into the meter [Install Sensor]
menu.
Confirm sensor spacing is correct
•
by checking [Install Sensor] menu
spacing parameters.
This may be due to one of the
following:
An out-of-range data entry.
•
An invalid condition (e.g.,
•
overlapping sensors in Reflect
Mode). If selecting Direct Mode
does not resolve, review all site
setup and sensor installation
choices; particularly data entered
for pipe and liquid.
In Reflect Mode the flow meter
•
detects that the pipe wall signal
may impinge upon the liquid signal.
Use Direct Mode instead.
Trigger <ENTER>, <Up Arrow>,
•
<Down Arrow>, or <Left Arrow> to
abort install routine. Continue
programming other site data in
anticipation of resolving the difficulty
later. Call technical support for help,
if necessary.
FUH1010 IP65 NEMA 7 Interface Detector Quick Start
Operating Instructions, 06/2014, A5E02428148-AA