Doser PD1 User manual

moisture meter type PD1
for paper and cardboard
Feuchtigkeitsmessgeräte
Moisture Meter
Humidimètre
Operating Instructions
page 1version 2003

Description:
The electronic moisture meter PD1 is used to determine in a
matter of seconds the moisture in materials. The average
moisture, down to a depth of approx. 3 cm is measured
material temperature range: 5 - 40°C
working temperature range: 5 - 40°C
storage temperature range: -20 - 70°C
.
materials: paper and cardboard
measuring range: 0 - 20 % H O
2
page 2
Moisture Meter Type PD1
Method of Operation:
The measuring electrodes 1 of the meter are pushed during the measuring process on the
material to be measured 2 so that a high frequency electrical field is able to pass through the
material. the percentage water content is determinedTaking in account the material setting, .
1
2
3
2
1
Measuring Principle:
The meter works in accordance with the principle of an
opened plate capacitor. The capacity of the capacitor depends
on the material (dielectric) constant of the material in between
the plates. Compared with air (e = 1) , for example water has
r
a very high dielectric constant (e = 80). The water content of a
r
wet material can therefore be determined by determining the
dielectric constant of this material.
PD1PD1
11,511,5
HYGROMETER
MATERIALDICHTE ON
•field lines
‚material to be measured
ƒplate capacitor

page 3
Measurement Preparation:
1
2
3
Moisture Meter Type PD1
Safety Tips:
- follow the operating instructions
- only use the meter as directed (see page
- keep the meter away from live and current carrying parts
- keep the meter dry
- avoid impacts
- protect the meter from heat
- keep the meter dry and try to prevent dirt from entering the
case
- protect the meter from electrostatic discharge.
- the meter must be repaired or serviced only by qualified
specialists
Damages caused by failure to follow the above mentioned
Safety Tips are not covered by the warranty!
2)
- material thicknesses < 5 cm 2 : use suitable bases 1 (for example: polystyrene or
foamed plastic plates - no metal!) or even better: hold the material to be measured into
the air
- thin materials (< 2 cm) 2 measure on a pile (pile thickness at least 2 cm,
avoid air gaps between the individual layers)
- look for an even, smooth surface (minimum size for the measurement 4 x 10 cm)
- minimum distance of the electrodes from the edge of the surface: 1 cm
:
3

page 4
Material Adjustment:
- chose the material group from the back of the meter
- switch the meter on, hold the meter into the air and adjust
the corresponding offset with the rotating knob
“MATERIALDICHTE”
Measuring:
- press the meter on the material
- press the „ON“-button
- read the moisture value
Turn off the Meter:
- release the „ON“ -button, the meter switches of
automatically
Ser. Nr.
009871
made in germany
PD1
11,511,5
HYGROMETER
MATERIALDICHTE ON
Ser. Nr.Ser. Nr.
009871009871
made in germany
PD1PD1
11,511,5
HYGROMETER
MATERIALDICHTE ON
BAT
Battery:
The meter works with a commercial 9V block battery. The
capacity of this is continuously controlled. If the battery is
running low, the display shows an alarm.
Change battery:
- open the battery box for example with a small screw driver
- take out the battery
- insert new battery, observing the correct polarity
Attention!
In accordance with battery legislation, all used batteries
must be disposed off in special battery collecting bins.
The disposal of old or used batteries as part of normal
waste is not allowed!
Moisture Meter Type PD1

page 5
Checking Measuring Quality:
We recommend carrying out regular periodical controlling check measurements, as different
local circumstances might need different material adjustments.
(recommendation: controlling measurements by oven drying method (EN 20 287 or ISO 287)
Moisture Meter Type PD1
Optional Extras:
- customer specific calibration
- manufacturer certificate
- test modul to check the sensitivity of the moisture meter
(with manufacturer certificate on request)
- plastic case for better protection
Our operating instructions are intended for guidance and to provide information on our products
and their uses. They should not be taken to imply special characteristics or suitability for any
specific purpose, other than those stated.
We constantly work to improve our products and reserve the right to alter our products and
operating instructions without advanced notification.
Oven Drying Method:
The oven drying method is the most acurate way to measure the material moisture in paper
(EN 20 287 or ISO 287).
We recommend this for testing and calibrating of all electronic moisture meters.
Short description:
1. for measuring the weights we recommend a balance with an measuring range of 200g and an
accuracy of 0,01g
2. for drying you need an oven with an adjustable temperature of 105°C
3. take a probe from the paper or cardboard, avoid edge parts, the probe should be at least 20g
4. it is very important to measure the weight of the first probe immediately, as air humidity may
change the moisture content, name of the first weight: wet weight (WW)
5. the probe must be dried in the oven until the weight is constant,
the maximum drying temperature: 105 °C (ISO 287)
7. the name of the dry weight is DW
8. the moisture content is calculated with the formula:
MOISTURE = (WW - DW)
WW * 100 %

Sensor Type WT
for use with the DOMA unit to determine surface temperatures
(e.g. on walls)
meauring range: -20,0 bis 70,0°C
measuring range for material moisture measurement:
for wood: 0,0 - 50,0 % H O
2
for building materials: 0,0 - 20,0 % H O
2
non-destructive - done in seconds - just lay it on the
material and read off the answer -
measuring depth approx. 3 cm
- memory for 50 measurements with automatic determination
of median, maximum and minimum value
- 2 sensors can be connected
- automatic dew point calculation
- simultaneous display of air temperature, relative humidity,
dew point and surface temperature
- material group setting by means of a membrane-type
keypad
Air Sensor Type LFLT
for use with the DOMA unit to determine relative humidity air
temperature and dew point
measuring range: -20 bis 70 °C
10 bis 95 %rF
Moisture Meter Type A10/20 for all Kinds of
Construction Materials
analog, hand-held, with capacitive measuring principle
measuring range: 0 - 20% H O
2
non-destructive - done in seconds - just lay it on the
material and read off the answer -
measuring depth approx. 3 cm
- material group setting by means of a rotary knob
- very large display scale
- especially good detection of differences in moisture levels.
- Threshold level for audible alarm, to indicate excessively
high moisture levels, can be set
Universal Meter Type DOMA for Determination of
Material Moisture in Wood and Building Materials,
Air Humidity, Air Temperature, Dew Point and
Surface Temperature.
OTHER INSTRUMENTS OUT OF OUR PRODUCT RANGE:

ATROTEST
In addition to our range of small units we also produce
customised measuring units for continuous moisture content
determination for a very varied range of materials such as
boards pallets, chopped materials, paper, cardboard and
leather fibres. Do not hesitate to contact us if you have a
requirement so that you can profit from our more than 50 years
of experience.
DOER MESSTECHNIK GmbH & Co. KG; Kemptener Str. 73; D-87629 Füssen; Germany
Tel:[phone]; Fax:[phone]; Email: [email protected]; Internet: www.doser.de
Moisture Meter Type P12/20 for Paper and
Cardboard
analog hand-held instrument with capacitive measuring
principle
Measuring range : 2 - 12% H O
2
10 - 20% H O
2
(automatic changeover of measuring range)
- material group setting by means of a rotary knob
- very large display scale
- especially good detection of differences in moisture levels
Moisture Meter type PD5 for Waste Paper
digital hand-held instrument with capacitive measuring
principle
Measuring range: 0,0 - 50,0 % H O
2
Plug-in probe: Ø 10 mm x approx. 420 mm,
with sharp point
- material group setting by means of a membrane-type
keypad
- the material group set can always be seen in the display
- the calibration curves for specific materials can be changed
Moisture Meter Type PD2 for Paper and
Cardboard
digital hand-held instrument with capacitive measuring
principle
Measuring range: 0,0 - 20,0% H O
2
- material group setting by means of a membrane-type
keypad
- the material group set can always be seen in the display
- the calibration curves for specific materials can be changed