26 GB
Failure Cause Solution
Unstable
measurement
(or) unreliable
measurement.
The battery
voltage is low.
Replace the battery (see
“Insert/replace battery”).
The
display[2]
has hung up.
Faulty wiring or
circuit.
Remove battery and re-
insert after 30 seconds.
Nothing is
displayed
on the
display[2].
The display[2]
is switched off.
Press the TEST button [3]
to switch the display[2]
on.
The battery is
inserted the
wrong way
round or the
battery contact
is poor.
Remove the battery and
insert/replace it in line
with the terminals and the
chapter “Insert/replace
battery” so that it touches
all contacts.
The battery
voltage is low.
Replace the battery in
line with the chapter
“Insert/replace battery”.