palintest Green Drop Kit Instructions Manual page 50

Problem
No display
when 'ON'
key
is pressed
Unstable
Readings
Possible cause Solution
a) Batteries
not in place
b) Batteries
not in correct
polarity (+ and –
position)
c) Weak
batteries.
a)
Insufficien
t electrolyte in
probe
b) Air
bubbles around
probe
c) Dirty or
damaged probe
d) Probe not
deep enough in
sample
a) Check that
batteries are in
place and making
good contact
b) Re-insert
batteries with
correct polarity
c) Replace
batteries.
a) Fill probe
with electrolyte and
replace pre-
membraned cap
b) Stir or tap
probe to remove
bubbles.
c) Clean the
probe and re-
calibrate
d) Make sure
sample entirely
covers the probe