Maintenance And Care; Maintenance Work - Wohler HBF 420 Bedienungsanleitung

9

Maintenance and care

Proper operation of the Wöhler HBF 420 requires regular control of the electrodes. (see
chapter 5.1, resistance measurement). The lifetime of the electrodes depends on the
treatment of the meter and on the hardness of the wood. The user himself can change
the electrodes. The following maintenance work has to be done.
9.1

Maintenance work

Interval
Regularly
When the electrodes
are damaged or bro-
ken
In case of pollution
Maintenance and care
Maintenance work
Control the distance be-
tween the electrodes (25
mm)
Broken or damaged nee-
dles can be exchanged by
the needle-kit delivered
with the device (see fig.
3.1, part 9) Loosen the
damaged needles with an
appropriate tool (gripper,
screw wrench or ring
wrench). Replace the
damaged needles by the
needle-kit and fix the new
needles with the tool.
ATTENTION! The tips of
the needles are very
sharp. Therefore the nee-
dle-kit should always be
protected by the protection
sponge.
Only clean the meter with
a soft cloth if necessary.
Make sure that no water
can penetrate into the
meter.
EN
57