Use; Procedure; Measuring Precautions; Characteristics - Würth FMM 10 Notice De Fonctionnement

4.1

Procedure

1.
Remove the protective cover from the prods. Then switches the
instrument on; you will notice the "on" indicator lamp lights up.
Note that the measuring prods may cause injury if not handled with caution.
2. Insert the prods firmly into the material and read the measurement
result:
For wood, insert the prods so that the current circulates parallel to the
wood fibres.
If the material moisture level is less than 6%, none of the LEDs light up.
If the percentage is between 6 and 23%, take the reading directly from
the right-hand column opposite the LED which is lit.
If the percentage is over 23%, the top LED will light up, indicating that
you should press on the red button on the front of the instrument. Then
read the percentage (between 24 and 100%) indicated in the left-hand
column opposite the LED which is lit.
Since the measurement result depends on the density and nature of the
material, its value is essentially one of comparison between the dry and
moist condition of this material.
3.
To switch the instrument off, simply replace the protective cover.
4.
If the "Low Batt." LED stays continuously lit, this means the battery
should be changed straight away.
4.2

Measuring precautions

The surface of the material must be dry otherwise the measurement
result will be incorrect. It is in fact the internal percentage of moisture in
the material that we wish to determine.
Measurement range: 6 to 100% of moisture in the wood or W.M.E..
■
Display: 20 LEDS on 2 scales: 6 to 23% and 24 to 100%
■
Accuracy : ± 2 LEDS
■
Battery status: "low batt." LED lights up when the battery power
■
supply is not sufficient to take a correct measurement
Power supply: 9V battery (6LR61 or 6F22 type)
■
Size / weight: 195 x 60.5 x 38 mm / 160 g with battery
■
Utilisation environment: 0 to 50 °C, <80% R.H.
■
Storage environment: -20 to +60°C, 0 to 80% R.H., without the
■
battery
Operating sufficiency: 30 hours
■
Safety: EN 61010-1
■
Electromagnetic compatibility : EN 61326-1
■

4. USE

5. CHARACTERISTICS

12