|
emco
moisture of special |
-Technical
Data |
|
| |
|
The dielectric principle of the absolute moisture
measurement |
|
 |
| |
|
The absolute moisture is the percentage water content in a
material applied on the dry mass (wood) or the total weight (paper). |
| |
At the dielectric measuring the material situated in the
measuring area is penetrated of an electric magnetic field whose
properties are determined fundamentally by the available
material moisture.
Because of the distinctive polarity of the water molecule and
the high dielectric constant of water of about 83 in comparison
approximately to paper (natural fibres have a dielectric
constant of 2) the capacity of a measuring area is dominantly
determined by the quantity of free water molecules into paper.
The electrical measuring signal must be calibrated in every case.
The calibration in % of the total weight has - provided the same
material - the consequence that the calibration depends on the
density or weight and the thickness of the material.
Fluctuations in the material composition lead to measurement
fluctuations. The proportionality applies: Fluctuation in %
leads to the same fluctuation in per cent of the measurement i.e.
the measurement is 100% and a measuring error arises of it in
height of the percentage fluctuation. |
| |
| |
AM 25 S
|
FF-T
|
|
Measuring principle:
|
dielectrical |
dielectrical |
|
Operating temperature: |
+5°C bis 35°C |
+5°C bis 35°C |
|
Resolution
of display: |
1%
moisture |
1%
moisture |
|
Dimensions: |
60 x 120 x 26 mm |
275 mm X 20 mm |
|
Power supply: |
9 Volt battery alkaline |
24
Volt |
|
Signal output: |
5 mA |
4 - 20 mA |
|
Weight without battery: |
ca. 140g |
ca. 140g |
|
Scope of supply: |
gauge, battery, certificate |
- |
|
Advanced delivery (optionally): |
wooden box, zero plate |
- |
|
Option: |
- |
Universal converter to adjust
4 - 20 mA (with LCD-display) |
|
Type of protection: |
- |
IP 65 |
|
