15
7. Alarms
6. Water quality
8. Problem solving
Problem
Cause
Remedy
Displayed pH
level doesn't
seem to change
Problem with cable and/
or connector
Make sure that the sensor-pH Perfect
connection is not short-circuited (between
the central core of the cable and the exterior
sheathing)
Make sure that there is no moisture and/or
condensation around the BNC socket
The appliance
always
displays a high
value or the
measurement
is constantly
unstable
The electrode connection
cable is damaged
Check the cable and/or the BNC socket
The pH sensor has an air
bubble in the bulb
Put the sensor into upright position and shake
gently so that the air bubble rises back up to the top
Note:
The sensor should be fitted in a vertical
position or at an angle no greater than 45°
The pH sensor is worn
Replace the pH sensor
The sensor cable is too
close to a power cable
causing interference
Reduce the distance between the appliance and the
sensor and/or place the cable elsewhere
Impossible to
calibrate
(error message)
Quality of
calibration of
the pH sensor
< 25%
Buffer solution is
ineffective
Make sure that the solution hasn't expired
Check the pH buffer solution with a pH electronic
meter
Check the pH buffer solution with a pH electronic
meter
Problem with the sensor’s
porous element, dirt
deposits
Make sure that the electrode bulb is in good
condition, that it has not been allowed to dry out
of the water. As a last resort, clean by soaking the
electrode in a 10% hydrochloric acid solution
Check that the porosity of the sensor is in good
condition (wash the sensor in an acid solution).
The pH sensor is worn
Replace the pH sensor
Slow response
from the pH
sensor
Static electricity on the
pH sensor
During the calibration phase DO NOT WIPE the pH
sensor with a cloth or paper, but after rinsing, shake
it gently
