wtw Turb 555 Operating Manual page 68

What to do if...
Measured values
that are obviously
too high
The sample does
not run out of the
pour-through vessel
Warning W-01
68
Cause
– Cuvette contaminated
– Cuvette scratched
– Cuvette misted up
– Air bubbles in the cuvette – Remove air bubbles
– Measuring instrument
has to be calibrated
Cause
– The end of the outlet
hose is placed too high
– There is a foreign body in
the pour-through vessel
Cause
– The light source is
defective
Turb 555 / Turb 555 IR
Remedy
– Clean the cuvette
– Replace the cuvette
– Regulate the temperature
of the sample before
measuring
– Run the instrument with
the dry air purge system
(see section 4.2.4)
– Calibrate the measuring
instrument
Remedy
– Place the end of the hose
lower than the measuring
instrument
– Remove the foreign body
Remedy
– Replace the lamp module
ba41113e07 04/2009