Xylem YSI VARiON Plus 700 IQ H, Руководство по эксплуатации, Страница: 48 / 62

What to do if ... VARiON
® Plus
700 IQ H
48
ba76207e02 12/2020
Measurement provides
jumping, unstable or
drifting values
– Electrode(s) not at all or
incorrectly recognized by the
system
– Check the installation and con-
tacts of the electrode (gap-free
mounting)
– Check electrode receptacle for
moisture
– If necessary, unscrew the elec-
trode/blind plug and thoroughly
dry the electrode/blind plug and
receptacle
– Electrode contaminated – Clean the electrode (see sec-
tion
6.2
)
– Liquid in the sensor shaft – Contact the service department
Cause Remedy
Cause Remedy
– Measurement / compensa-
tion electrode:
Electrode membrane not
moistened by measuring
solution, e.g. due to air in
front of the membrane (mem-
brane dried up)
– Moisten membrane with deion-
ized water using a wash bottle.
To do so, position the opening
of the wash bottle on the mem-
brane and splash against the
membrane vigorously
– Measurement / compensa-
tion electrode:
Air bubble behind the mem-
brane
– Hold the electrode in a vertical
position with the membrane
down and knock it on the side
with the special socket wrench
until the air bubble moves up
– Measurement electrode /
compensation and reference
electrode:
Insufficient electrical contact
in the electrode receptacle
– Check the installation and con-
tacts of the electrode (gap-free
mounting)
– Check electrode receptacle for
moisture
– If necessary, unscrew the elec-
trode/blind plug and thoroughly
dry the electrode/blind plug and
receptacle
– Reference electrode dried up – Replace reference electrode
– Measurement / compensa-
tion electrode or reference
electrode leaky or damaged
– Replace defective electrode
– Liquid in the sensor shaft – Contact the service department