SenTix
®
FET-D/B
What to do if...
37
6
What to do if...
Error symptom
Cause
Remedy
The sensor obviously
supplies incorrect
measured values
– No connection between
measuring instrument and sensor
– Cable defective
– Sensor switched off
– Check connection between
measuring instrument and sensor
– Replace the sensor
– Switch on the sensor
The sensor cannot be
calibrated
– pH sensitive area and/or junction
contaminated
– Zero adjustment erroneous
– Sensor not sufficiently watered
– Clean the measuring tip (see
section 5.9)
– Carry out zero adjustment
– Watering the sensor
The sensor still cannot
be calibrated after
cleaning
– Measuring tip depleted
– Exchange the measuring tip (see
section 5.10)
Incorrect temperature
display
– Temperature sensor defective
– Cable defective
– Exchange the measuring tip (see
section 5.10)
– Replace the sensor
Mechanical damage to
the measuring tip
– Exchange the measuring tip (see
section 5.10)
The battery LED flashes – The batteries are almost empty
– Insert new batteries (see
section 3.2)
