Calibration Check; Changing The Batteries; Error Message - Wohler HBF 420 Mode D'emploi

Calibration check

6 Calibration check
7 Changing the bat-
teries
8

Error message

Error code
L04
56
You can easily check the calibration of the meter
with the aid of the two calibration points on the
two protection caps. Depending on the protection
cap, an 18 % or a 25 % humidity calibration check
can be done.

Switch on the meter and enter the wood tem-
perature 20 °C.

Select "resistance measurement" (see chapter
4.1).

Select material code Cd00 (see chapter 4.2).

Press the M key (2) to enter the measuring
mode.

Connect the needles of the Wöhler HBF 420
or the Wöhler Wood Moisture Probe to the
points.

Keep the the M button (2) pressed for four
seconds. The value indicated in the display
should be u = 18 or u = 25 depending on
which protection cap was used. If the indicat-
ed value differs more than ± 0.90 or ± 1.25 re-
spectively, we recommend to send us the de-
vice for calibration.
If the battery voltage gets too low, the battery sym-
bol is displayed and the display contrast becomes
weaker. The battery should be replaced.

To do so open the battery compartment at the
rear of the instrument, remove the old batter-
ies and replace it with 4 new batteries 1.5 V,
AAA. Observe the right polarity.
Reason
The error code L04 will
appear in case of a nega-
tive reading.
Troubleshooting
Carry out a zero point cali-
bration, see chapter 4.6.