Schaller humimeter.com LM6 User manual

User manual
LM6
leather moisture meter
Version 2.2_en
© Schaller GmbH
2012

page 2 Version 2.2_en
Operation and handling:
Switching on: Press the button for 3 seconds.
Changing the calibration curve: or key.
Switching on the display lighting: Press the button briefly; the lighting
switches off automatically after approx. 20 seconds. Pressing any key
activates the lighting again and prolongs the switch-off time to 4 minutes.
Switching off: Press the key for 5 seconds; the device will switch off after
releasing the key. After approx. 4 minutes the device will switch off
automatically.
Measuring procedure:
Switch on the humimeter LM6 by pressing the key for 3 seconds.
Select the appropriate calibration curve using the arrow keys.
Hold the device in one hand and
press it onto the leather well-
setted (4 kg compacting
pressure).
The leather pile has to be at
least 10mm high!
The display shows the water
content immediately (large
numbers).
Calibration curves
Name Calibration curve density
leather LD leather of low density 0,55 g/cm³
leather CR leather chrome tanned 0,60 g/cm³
leather MD leather of medium density 0,65 g/cm³
leather FOC leather free of chrome, fire protection
leather
0,70 g/cm³
leather HD leather of high density 0,75 g/cm³
leather VHD leather of very high density 0,80 g/cm³
Reference
! Only for checking the instrument !

Version 2.2_en page 3
100% ×
−
=
Mn
MtMn
WG
Selection of calibration curves
Due to different manufacturing methods and different densities of the leather
there is no standardised allocation of calibration curves.
In the above list of calibration curves you can find information regarding
manufacturing methods and density that enables a preselection of the
calibration curve.
To ensure the best accuracy of your measurement, we recommend to carry
out a comparison measurement by kiln-drying (norm DIN 53304) once:
1.) Take a leather pile of 10-15mm of the format A6 with average moisture
content.
2.) Measure the water content of this leather pile using all available
calibration curves and write down the measuring results of the different
calibration curves.
3.) Take the 2 top leather pieces of the pile and carry out a reference
measurement according to DIN 53304.
4.) Compare the determined reference water content with the measuring
results of the different calibration curves. Use the calibration curve with
the measuring result nearest to the reference water content.
Determination of the reference water content
The humimeter LM6 determines the water content, which means that it
calculates the moisture referred to the total mass (DIN53304):
Short description of norm DIN53304:
Take a leather piece according to DIN 53302 T2 or DIN 53303 T2. For the
determination of the water content, weigh the leather piece with an accuracy
of 0,001 g (mass Mn). Put the piece of leather in a glass bowl that was dried
at (102 ± 2) °C and was weighed after cooling to room temperature. Dry the
opened glass bowl in a drying chamber at (102 ±2) °C for 5 hours. After
closing the glass bowl cool it in an exsiccator. Now determine the mass (Mt).
After that, go on with the above described drying procedure in the drying
chamber for one further hour, cool and weigh again. If the weight after the
second drying period decreases less than 0,1 % of the initial weight, the
assay is finished. If the decrease of weight is higher than 0,1 %, the drying
has to be continued. The total period of drying must not exceed 8 hours.
Mn:
Mass with average moisture
content
Mt: Mass of the dried sample
%WG: Calculated water content

page 4 Version 2.2_en
Design of the device
calibration curve
rolling
m
enu
resp. hold key
rubber protective
housing
ON / OFF button
measuring value
moisture
measuring value
temperature
changing
calibration curve
batteries slot
(flipside)

Version 2.2_en page 5
Menu
There are 3 menu levels.
The symbols show the key functions in
the different menus.
1. Type selection :
2. Saving :
3. Main menu
Rolling menu: Use this key to enter the
different menu levels and main menu.
Power: Press this key for 3 seconds to
switch the instrument off or on. Press this
key briefly to activate the display lighting.
Up: This key moves you to the next
type/calibration curve.
Down: This key moves you to the
previous type/calibration curve.
Disk: Use this key to save measurement
values.
If the number in front of the disk symbol
increases, the measuring value has been
saved.
Alternatively: Hold: The currently shown
measurement value is held. It is released
when another key is pressed.
View logs: If no logs are active, you
can use this symbol to view the saved
measuring series.
Alternatively: Edit logs: If logs are active,
you can press this symbol and then enter
e.g. batch number and supplier’s data for
the series.
In the saving level, press (rolling menu)
to enter the main menu.
Main menu
Edit logs
Manual logs
Clear logs
Print logs
Last logs
All logs
Clear logs
Send logs
Manual logs
Clear logs
Options
Date / Time
Logtime
Language
Unlock
°C / °F
Calibrate
o Userlevel
BL On Time
Auto Off time
Materialcalib.
Password
Reset
SN.
Logo
TM
Admin
Status
Key functions in the menu
: Confirm – activates menu item
: Up – long press => jumps to the start of the menu
: Down – long press => jumps to the end of the menu
: Exit – exits the menu item or menu

page 6 Version 2.2_en
Common reasons for incorrect measurements
•Wrong calibration curve
Double check the correct selection of the calibration curve before measuring. The
calibration curve „reference“ must NOT be used.
•Inadequate thickness of the leather pile
A single leather hide must NOT be measured. Pile the leather to ensure a
thickness of at least 10 mm.
•Metal below the material
During the measurement there must NOT be any metal for at least 100 mm under
the measured material.
•Product temperature out of application range
The application range is between 0°C and +40°C.
•Discrepancy in temperature between device and material
Please ensure that the device and the material under test are being stored at
nearly the same temperature before measuring. A high temperature difference has
a negative effect on the stability of the measurement results.
Looking after the instrument
Do not drop the instrument or expose it to excessive temperatures. Only clean it with a
lint-free, dry cloth. The instrument is not waterproof.
How often you need to check the instrument depends on the use and the required level of
accuracy in your field of operation. For a fee, Messtechnik Schaller GmbH can also carry
out a calibration at their factory. In this case you will also receive a calibration certificate.
Changing the batteries
Your new device is provided with batteries. Please find enclosed the manual for changing
of batteries:
At first remove the rubber protective housing. For that, hold the rubber housing at the
upper side and pull it over. If your humimeter is provided with an optional USB port, you
have to remove the protection cap before. Press with your finger onto the arrow of the
battery cap und pull it back.
Remove the empty batteries. Put four new batteries in the device. Make sure that the
position of the battery poles is correct. Press down the batteries and close the cap.
Exemption from liability
For miss-readings and wrong measurements and of this resulting damages we refuse any
liability. As this rapid measurement procedure is influenced by product-specific and
application-specific conditions, we recommend to carry out a plausibility check on the
measurement results. Each instrument has a serial number and a warranty seal. If this is
broken we cannot provide warranty. If the instrument is defective, contact Messtechnik
Schaller GmbH or your supplier.

Version 2.2_en page 7
Checking the calibration
We recommend to check the calibration of the humimeter LM6 every 4 weeks, using the
proof plate delivered with the device. For this check the device has to show a temperature
between 18,0 and 24,0°C.
Switch on the instrument and select the calibration curve
„reference“ using the arrow keys. Hold the humimeter LM6
in one hand and press it onto the grey proof plate
(compacting pressure of 4,0kg).
The shown measuring value should range between 14,5
and 15,5. If the shown value is out of this range, you have
to carry out a calibration (see instructions below)
Calibration
By a zero point adjustment you can correct a too high
deviation of the calibration check.
For that please proceed as follows:
Press the left key twice to reach the menu level. Navigate
to the menu item „Options“ using the arrow keys. Confirm
by pressing the button.
Select the menu item „Calibrate“ using the arrow keys and
confirm by pressing the key.
This menu item has to be unlocked. For that you have to
enter the 4-digit serial number of your humimeter LM6. You
can find the serial number on the top right edge of your
display a short time after switching on the instrument, or on
the sticker in the battery slot.
Press the third button as long as the black bar stands on
the first digit of the serial number. After a waiting time of a
few seconds the device accepts the entered digit. Now the
other 3 digits have to be entered. When the 4-digit number
has been entered correctly (see picture), press the
button to confirm.
The request “Reinitialize?” will appear at the display.
Hold the humimeter LM6 in one hand and make sure that
nothing stands behind the measuring field (black plate).
Now press the second button ( ) with one finger.
The calibration procedure will take a few seconds. During
that time, the instrument has to be held up in the air and
the measuring field must NOT be touched.
The device is ready when the shown picture on the right
disappears automatically.

page 8 Version 2.2_en
Technical data
Measuring depth 5 mm
Minimum material thickness 10 mm
Measuring range 3% to 65% water content
Temperature measuring range -10°C to +50°C
Resolution 0.1% water content ; 0.5 °C
Operation temperature range 0°C to +40°C
Storage temperature -20°C to 60°C
Temperature compensation automatically
Memory for measured values approx. 10.000 values
Menu languages German, English, French, Italian,
Spanish, Russian
Power supply 4 x 1,5 Volt AA Alkaline batteries
(for approx. 900 measurements)
Switch off time after approx. 4 minutes
Power consumption 60 mA (with display lighting)
Display 128 x 64 matrix display,
with LED-backlighting
Dimensions 147 mm x 75 mm x 30 mm
Weight 265g (incl. batteries)
Protection class IP 40
Scope of supply LM6, 4 x 1,5 Volt AA Alkaline batteries,
wooden case, proof plate, rubber
protective housing, user manual
Options PC interface incl. software and cable,
mobile printer (only with option 1)