Application Notes
26
Hydromette BL A plus
5.1.1.2
Surface measuring caps
Surface measurements should only be made with wood moisture
levels under 30%. For surface measurements on workpieces that
have already been machined, or for measuring veneers, both
hexagon nuts on the M 20 electrode are unscrewed and replaced
with the surface measuring caps. For the measurement, both
contact surfaces are pressed onto the workpiece to be measured or
onto the veneer at right angles to the grain direction. The
measurement depth is approx. 3 mm, therefore multiple sheets of
veneer must be laid on top of each other for the measurement. Do
not measure on metal surfaces! When measuring stacks of veneer,
to expose the measuring point, ensure that the veneer is
lifted
and
not
pulled
over the remaining stack
(avoid friction: electrostatic
charge!).
Wood particles adhering to the measuring surface must
be regularly removed. If the elastic, plastic measurement sensors
are damaged, they can be reordered (no. 4316) and glued on using
commercially available cyanate-based instant adhesive.
5.1.1.3
Stick-in electrode pair M 20-HW 200/300
If the hexagon nuts with standard electrode tips on the M 20
electrode are removed, they can be replaced with the M 20-HW
electrode tips. These must be fastened tightly!
For measurement in chips and wood wool, it is advisable to
compact the material to be measured slightly. To do so, sawdust
should be pressed together with a weight of approx. 5 kg. No
compression is necessary for balls of wood wool.
