Xylem MPP 350 - Manual (Page 23)

MPP 350 What to do if...
23 ba75434e02 07/2005
6.2 Error symptoms of conductivity measurement
6.3 Error symptoms of pH measurement
Error symptom Cause Remedy
No temperature or con-
ductivity display – No connection between meter and
sensor
– Cable defective
– Check connection between meter
and sensor
– Return the sensor
Measurement delivers
implausible conductivity
values – Incorrect cell constant adjusted at
the meter
– Measuring range exceeded
– Contamination in the area of the
electrodes
– Electrodes damaged
– Check / correct the cell constant
– Observe the application range
– Clean the sensor (see
section 5.2).
– Return the sensor
Incorrect temperature
display – The temperature sensor was not
immersed in the measuring
solution
– Temperature sensor defective
– Observe the minimum immersion
depth
– Return the sensor
Error symptom Cause Remedy
No pH display – No connection between meter and
sensor
– Cable defective
– pH electrode defective
– Check connection between meter
and sensor
– Return the sensor
– Replace pH electrode