wtw Turb 550, Operating Manual

Page: 44 / 54

What to do if ...
44
Cause Remedy
– The backup batteries
are almost empty
– Change the batteries (see
5.1.2 C
HANGING THE
BATTERIES
)
Cause Remedy
– The calibration interval
set up has expired
– Calibrate the instrument
(see 4.3 C
ALIBRATION
)
Cause Remedy
– Cell contaminated – Clean the cell
– Cell scratched – Replace the cell
– Cell misted up – Regulate the temperature
of the sample before
measuring
– Air bubbles in the cell – Remove any air bubbles
– Measuring instrument
needs to be calibrated
– Calibrate the measuring
instrument
Cause Remedy
– The end of the outlet
hose is placed too high
– Place the end of the hose
lower than the measuring
instrument
– There is a foreign body in
the flow-through vessel
– Remove the foreign body
“LoBat” display
flashes
“Cal” display
flashes
Measured values
that are obviously
too high
The sample does
not run out of the
flow-through
vessel