Zodiac pH Perfect, Руководство пользователя

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Problem Possible Cause Remedy
The pH Perfect
always displays
pH 7.00
The instrument
always displays a
high value or
measurement is
constantly
unstable.
It is impossible to
calibrate pH 7 (the
“Alarm/Alarme”
and “Hold/Pause”
diodes flash)
Problem on the cable
and/or connector
•the electrode connection
cable is damaged
•there is an air bubble in
the electrode membrane
•the electrode is worn
•connection cable too long
or too close to an
electrical cable causing
interference
•buffer solution ineffective
•make sure that the pH Perfect electrode
connection has not short-circuited (between
the central core of the cable and the exterior
sheathing)
•make sure there is no moisture and/or
condensation on the sensor connection on
the appliance
•make sure that the 100 Ohms resistance
between terminals 11 and 12 is in place
•check the cable
•put the electrode into an upright position and
shake gently so that the air bubble rises back
up to the top
NB: the electrode should be fitted in a vertical
position or at an angle no greater than 45°
•Change the electrode
•reduce the distance between the appliance
and the sensor
•make sure the solution used is the pH 7
•check the pH of the buffer solution with an
electronic pH meter
•take a new batch of pH 7 buffer solution and
begin calibration again
TROUBLE SHOOTING