- 12 -
For the example values given in a, b and c the result is:
62
100
g =
x
= 0.56
94.2
100 + 17.2
e) now you can use the calculated density (e.g. 0.56) for
any future measurements of this type of timber.
9. Errors
If the instrument can not calibrate properly it indicates
the following error:
-AIr
- generator voltage too low
AIr
- generator voltage too high
In such case power off the device, check the geometry of
the electrodes, clean the electrodes, make sure the device is
dry and then start the calibration again (see chapter 4).
If the instrument still reports error contact the
producer.
- 5 -
Density values for other (also exotic) wood types are in
chapter 7 of the users manual.
5. Measurements
The measurements should be conducted in at least
several places. These places should be as flat, smooth and
clean as possible. The actual result of the measurements is
the arithmetic average of all the measurements. A line
drawn between the electrodes should be perpendicular to
the fibres. If the timber is too thin, place the electrodes
parallel to the fibres.
Hold the device as shown on fig 2. Press the electrodes
hard against the wood. Read the result.
There should not be any metal elements, wet wood or
concrete etc under the timber. It’s best if the timber is
supported only by it’s ends or placed on a layer of
Styrofoam several centimetres thick.
The instrument is equipped with an automatic power
off which activates 5 minutes after the last change in upper
control knob setting. It can be switched off instantly by
setting the upper control knob to OFF.
