wtw Turb 350 IR, Operating Manual, Page: 34 / 42

What to do if...
76
Error message
ERR 1
Error message
ERR 2
Error message
ERR 3
Error message
ERR 4
"
ERR ERR ERR ERR
" appears
instead of the mea-
sured value
Note
If a fault cannot be remedied, send the instrument to WTW.
Cause Remedy
- The light source is
defective
- Have the instrument
repaired
by the WTW service
department
Cause Remedy
- Error during calibration:
signal between 0.02 and
10.00 NTU is too weak
- Check that you have used
the correct standards and,
if necessary, repeat the
calibration
Cause Remedy
- Error during calibration:
signal between 10.00
and 100.00 NTU is too
weak
- Check that you have used
the correct standards and,
if necessary, repeat the
calibration
Cause Remedy
- Error during calibration:
signal between 100.0
and 1000 NTU is too
weak
- Check that you have used
the correct standards and,
if necessary, repeat the
calibration
Cause Remedy
- Several errors are
present at the same time
- See ERR 1 to ERR 4