Wohler HF 550 User manual

The Measure of Technology
Manual
Wood Moisture Meter
Best.-Nr. 23851 –2016-08-02
Wöhler HF 550

Inhalt
2
Contents 1General Information..............................4
1.1 Operation Manual Information....................... 4
1.2 Notes............................................................. 4
1.3 Proper use..................................................... 4
1.4 Transport....................................................... 5
1.5 Information on disposal................................. 5
1.6 Manufacturer................................................. 5
2Technical Data.......................................6
2.1 Wöhler HF 550 Wood Moisture Meter........... 6
2.2 Wöhler FW 550 Moisture Scale for Bulk
Material ......................................................... 7
3Device components and connections 8
3.1 Meter............................................................. 8
3.2 Probes and Moisture Scale.......................... 9
4Operation.............................................10
4.1 Switching the meter on and off.................... 10
5Check battery status and charge
battery ..................................................12
6Measuring the wood moisture of logs..
..............................................................13
6.1 Theoretical background............................... 13
6.2 Connecting the Probe.................................. 14
6.3 Measuring ................................................... 16
7Moisture Measurement of bulk material
..............................................................22
7.1 Measurement procedure............................ 22
7.2Preparation of the measurement................. 23
7.2.1 Positioning the Moisture Scale.................... 23
7.2.2 Connections ................................................ 23
7.3 Measuring ................................................... 24
8Main menu...........................................29
8.1 Moisture Measurement Delete old
measurement.............................................. 29

Inhalt
3
8.2 Selection of the material ..............................30
8.2.1 Log choice (in mode)...................................30
8.2.2 Bulk choice (when the Moisture Scale is
connected.)..................................................31
8.3 Customer.....................................................31
8.4 Save ............................................................31
8.5 Print.............................................................32
8.6 Select probe.................................................33
8.7 SETUP.........................................................33
8.8 Check HF 550 and calibration HF 550.........34
9Data administration............................35
9.1 Save records................................................35
9.2 Creating a new customer folder...................36
9.3 Customer Menu...........................................37
10 Maintenance and care........................38
11 Warranty and Service.........................39
11.1 Warranty......................................................39
11.2 Service.........................................................39
12 Accessories.........................................40
13 Sales and Service Points...................41

General Information
4
1General Information
1.1 Operation Manual In-
formation
This operation manual allows you to work safely
with the Wöhler HF 550. Please keep this manual
for your information.
The Wöhler HF 550 Wood Moisture Meter should
be employed by professionals for its intended use
only.
Liability is void for any damages caused by not
following this manual.
1.2 Notes
WARNING!
Not following this warning can cause injury or
death.
CAUTION!
Not following this note can cause permanent
damage to the meter.
NOTE!
Highlights tips and other useful information.
1.3 Proper use
When the Wöhler HF 550 Wood Moisture Meter is
connected to the Hammer Probe or the Lance
probe, it is suitable for the determination of the
moisture of firewood logs according to VDI 4206,
sheet 4 and the 1. BImSchV. (Federal Immission
Control Act)
When the Wöhler HF 550 Wood Moisture Meter is
connected to the Wöhler FW 550 Moisture Scale,
it is suitable for the determination of the moisture
of bulk material according to the requirements of
VDI 4206, sheet 4.

General Information
5
1.4 Transport
CAUTION!
Improper transport can harm the meter, scale and
probes.
Always transport the meter, scale and probes in
the provided carrying case in order to prevent
damage.
WARNING!
Always secure the sharp probe needles with the
protection cap.
1.5 Information on disposal
Electronic equipment does not belong into domes-
tic waste, but must be disposed in accordance
with the applicable statutory provisions.
You may hand in any defective batteries taken out
of the unit to recycling places of public disposal
systems or to selling points of new batteries or
storage batteries.
1.6 Manufacturer
Wöhler Technik GmbH
Schützenstr. 41
33181 Bad Wünnenberg
Tel.: [phone]
Fax: [phone]
Email: [email protected]

Technical Data
6
2Technical Data
2.1 Wöhler HF 550 Wood Moisture Meter
General technical data
Connections
Wöhler Hammer Probe, Lance Probe,
Wöhler FW 550 Moisture Scale,
Temperature Probe, USB-data transfer
Power supply
Lithium-ion battery 3.6V, 2,250 mAh, charging via USB
Working time
ca. 20 h
(depending on the operating mode and the Display Backlight)
Storage
Temperature
-20°C to +50°C
Operating
temperature
+5°C to +40 °C
Weight
255 g (without probe)
Size
59 x 38 x 200 mm
Moisture measurement of firewood logs
Display
Wood moisture u displayed in % relative to the dry mass of fuel;
user can switch to water content w displayed in % relative to the
moist mass of fuel
Wood species
14 wood species to choose from
Temperature
compensation
Measures temperature of material by means of a temperature
probe
Measurement
principle
Electrical resistance measurement
Range
Moisture: 10.0 % u - 40.0 % u, resolution 0.1 % u
Water content: 9.0 % w - 29.0 % w, resolution 0.1 % w
Accuracy
± 40 % of reading according to VDI 4206 page 4

Technical Data
7
2.2 Wöhler FW 550 Moisture Scale for Bulk Material
Moisture Measurement of bulk material
Display
Wood moisture u displayed in % relative to the dry mass of fuel;
user can switch to water content w displayed in % relative to the
moist mass of fuel
The readings are displayed on the HF 550 screen or on the PC
screen
Bulk material
Selectable: wood chips and pellets, as well as six species of grain
Measurement
principle
Dielectric mass measurement
Range
Moisture: 0.1 % u to 70.0 % u, resolution 0.1 % u
Water content: 0.1 % w to 41.0 % w, resolution 0.1 % w
Accuracy
0.1 % u to 5.0 % u, if 2 % u
±40 % of reading in the range 5,0 % u to 70,0 % u
For fuels tested according to the requirements of VDI 4206 Part 4

Device components and connections
8
3Device components and connections
3.1 Meter
Fig. 1: Device components
1. Connection for temperature probe
2. Screen
3. Keypad
4. Infrared port for the data transfer to the
Wöhler TD 100 Thermoprinter
5. Jack connection:
a) Hammer Probe
b) Lance Probe
6. USB port
a) for Charger
b) for Wöhler FW 550 Moisture Scale
7. Transport lock for activating the accu.
Fig. 2: Keypad
1. ESC-key (context-sensitive):
a) cancel the current function
b) go to the main menu
c) return to the measurement menu
2. Arrow-keys:
scroll up and down
3. ON-/Off-key (context sensitive):
a) Switch the meter on and off
(press and hold for 3 seconds)
b) Confirm
c) Save value or delete saved value
1
2
3
4
5
6
7
1
2
3

Device components and connections
9
3.2 Probes
and Moisture Scale
CAUTION!
The meter may only be used with the following
Wöhler original accessories:
Firewood logs and bulk material
Fig. 3:
Temperature probe Wöhler HF 550
The Temperature probe has to be connected to
the meter for measuring the temperature of the
sample.
Firewood log
Fig. 4: Lance Probe
The Wöhler Hammer Probe or the Lance Probe
have to be connected to meter for measuring the
wood moisture of logs.

Operation
10
Fig. 5: Wöhler Hammer Probe
The result of the resistance measurement will be
more exact, if the Hammer Probe is used, be-
cause the needles of the probe can be inserted
more deeply into the wood, so that humidity can
even be measured inside the wood.
Bulk material
Fig. 6: Wöhler FW 550 Moisture
Scale for Bulk Material
The Wöhler FW 550 Moisture Scale has to be
connected to the meter for measuring the mois-
ture of bulk material.
NOTE!
The meter will automatically detect, if a hammer/lance probe for the measurement of
firewood logs or the moisture scale is connected. The measurement mode for firewood
logs or for bulk material will automatically be displayed in this case.
4Operation
Fig. 7: Transport lock on the right side of
the meter
CAUTION!
For the transport deactivate the battery with the
transport lock. When the instrument is delivered,
the battery is always deactivated.
Push the transport lock to the left to activate
the battery. Use a pointed object (wire or pen)
for this purpose.
4.1 Switching the meter on and off
Fig. 8: Key pad with on/off-key marked
Turning on the Meter: Press on/off-key shortly
(on the right)
Turning off the meter: Long press the on/off-
key for 3 sec.
Transport lock