TetraCon 700
What to do if ...
31
ba55320e05
11/2009
6
What to do if ...
Measurement delivers
no or wrong measured
values
Measurement provides
implausible measured
values
Cause
Remedy
– Conductivity measuring cell not
correctly connected
– Check connection to measur-
ing transmitter
– Cable damaged
– Check cable. If it is defective,
send conductivity measuring
cell to WTW
– Measuring range exceeded
– Select larger measuring
range or set automatic selec-
tion of the measuring range
Cause
Remedy
– Conductivity measuring cell is
heavily contaminated
– Clean the conductivity mea-
suring cell
– Boundary fields not observed
– At the electrodes, the conduc-
tivity measuring cell must be
surrounded by a clearance of
at least 5 cm at the base and
sides. Otherwise, the cell con-
stant will change (see section
4.1 M
EASURING
)
– Electrodes damaged
– Return the measuring cell
– System setting incorrect
– Correct the system setting
– Measuring range exceeded
– Observe the range of applica-
tion
– The measuring cell was
installed in a flow-through
device and the boundary field
is not sufficient
– Set the cell constant to the
value of the installed position
(if known)
– If the cell constant of the mea-
suring cell in the installed
position is not known, Adjust
the measured value to the
nominal value of a measuring
solution (see operating man-
ual of the measuring transmit-
ter)
