Cygnus MINI ROV Operation Manual
M4-CYGMINI-TSR-M-ENG_Iss 1
Page 48 of 66
11.
Troubleshooting
Difficulty obtaining a Reading
If there is 1 single flashing bar on the display – this means the
Gauge is not receiving any echoes:
Check that the Probe-lead is properly connected to both
Probe and Gauge
Check the condition of the lead and replace if necessary
If there is mostly 1 fixed bar plus 1 flashing bar this means that
the Gauge is having difficulty obtaining more than one echo:
Check the Probe and its membrane are properly assembled.
If there are up to 3 fixed bars plus 1 flashing bar, but never any
reading – this means the Gauge is receiving unrelated echoes from
more than one reflector:
On heavily corroded areas this is often a problem, try and
take measurements in adjacent areas of the same material
Check the Gauge and Probe together on a test block, if there
is still no reading the Gauge may require servicing
If Readings are Erratic or Unstable
Check that the Probe-lead is properly connected to both
Probe and Gauge
Check that the Probe and its membrane are correctly
assembled with sufficient couplant between the probe face
and membrane
Check the Probe-frequency is suitable for the probable
minimum thickness of the material being measured. Probe
frequencies which are too low cause doubling and tripling of
the actual thickness
