KERN & Sohn GmbH
Ziegelei 1
Phone: +49-[0]7433- 9933-0
Operating manual
Electronic Moisture Analyser
KERN DLT-N
Version 2.1
12/2014
GB
D-72336 Balingen
E-Mail: info@kern-sohn.com
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
DLT_N-BA-e-1421
KERN DLT-N
Electronic Moisture Analyser
GB
Version 2.1 12/2014
Operating manual
Contents
1 Technical data ................................................................................................ 5
2 Appliance overview ....................................................................................... 7
2.1 Overview ...............................................................................................................................7
2.2 Tablet ....................................................................................................................................8
3 Basic instructions .......................................................................................... 9
3.1 Proper use ............................................................................................................................9
3.2 Improper Use ........................................................................................................................9
3.3 Warranty ...............................................................................................................................9
3.4 Monitoring of Test Resources .............................................................................................9
4 Basic Safety Precauti o ns ............................................................................ 10
4.1 Pay attention to the instructions in the Operation Manual ............................................... 10
4.2 Personnel training .............................................................................................................. 10
4.3 Danger Information ............................................................................................................ 10
5 Transport and storage ................................................................................. 12
5.1 Testing upon acceptance ................................................................................................... 12
5.2 Packaging / return transport .............................................................................................. 12
6 Unpacking, Setup and Commissioning ..................................................... 12
6.1 Installation Site, Location of Use ....................................................................................... 12
6.2 Unpacking and placing ...................................................................................................... 14
6.3 Scope of delivery / serial accessories ............................................................................... 15
6.4 Connections ....................................................................................................................... 16
6.5 Mains connection ............................................................................................................... 19
6.6 Commissioning .................................................................................................................. 19
6.7 Call-up weighing mode ...................................................................................................... 24
6.8 Connection of peripheral devices ...................................................................................... 24
6.9 Adjust balance .................................................................................................................... 25
2 DLT_N-BA-e-1421
7 Operating elements ..................................................................................... 27
7.1 Start screen ........................................................................................................................ 27
7.2 Work screen ........................................................................................................................ 29
8 Simple weighing / taring .............................................................................. 30
8.1 Weighing: ............................................................................................................................ 30
8.2 Taring: ................................................................................................................................. 30
8.3 Default tare (pre tare) ......................................................................................................... 30
9 User profile ................................................................................................... 31
10 Setup menu .................................................................................................. 32
10.1 Heating module settings .................................................................................................... 33
10.2 Balance settings ................................................................................................................. 35
10.3 Peripheral equipment ......................................................................................................... 36
10.4 Adjustment ......................................................................................................................... 37
10.5 Colour of display ................................................................................................................ 38
10.6 Service menu ...................................................................................................................... 39
11 Drying parameters ....................................................................................... 40
11.1 Setting the drying parameters manually ........................................................................... 40
11.1.1 Setting the heating profile .................................................................................................... 41
11.1.2 Shutoff criterion .................................................................................................................... 44
11.1.3 Preheating (before weighing-in) ........................................................................................... 46
11.1.4 Weighing assistance ............................................................................................................ 47
11.1.5 Result display ....................................................................................................................... 49
11.2 Save drying parameters in database ................................................................................. 51
11.2.1 Creating a new drying program (data record): ..................................................................... 52
11.2.2 Change / delete drying programs (data record) ................................................................... 53
12 Carrying Out Measurement ......................................................................... 54
13 Call up / edit / delete measurement results ............................................... 64
13.1 Calling measurement results ............................................................................................. 64
13.2 Changing / deleting measurement re sults ........................................................................ 65
14 GLP ............................................................................................................... 66
DLT_N-BA-e-1421 3
15 General information concerning moisture analysis ................................. 68
15.1 Application ......................................................................................................................... 68
15.2 Basics ................................................................................................................................. 68
15.3 Adjustment to existing measuring method ....................................................................... 68
15.4 Preparing a sample ............................................................................................................ 69
15.5 Sample material .................................................................................................................. 70
15.6 Sample size / originally weighted in q u antity .................................................................... 70
15.7 Drying temperature ............................................................................................................ 71
15.7.1 Surface of the sample: ......................................................................................................... 71
15.7.2 Colour of sample: ................................................................................................................. 71
15.7.3 Availability of volatile substances: ........................................................................................ 71
15.8 Recommendations / Guidelines ......................................................................................... 71
15.8.1 Prepare standard sample: .................................................................................................... 71
15.8.2 Prepare special samples: ..................................................................................................... 71
15.8.3 Table of applications: ........................................................................................................... 72
16 Servicing, maintenance, disposal .............................................................. 76
16.1 Cleaning .............................................................................................................................. 76
16.2 Servicing, maintenance ...................................................................................................... 76
16.3 Disposal .............................................................................................................................. 76
17 Instant help ................................................................................................... 77
4 DLT_N-BA-e-1421
1 Technical data
Result display
Data DLT 100-3
Radiator Halogen (1 x 400 W)
Temperature range
Maximum load (Max) 160 g
Warm-up tim e 2 h
Minimum for drying 0.5 g
Weighing mode 0.001g
Readability (d)
Moisture analysis mode 0.01 %
Weighing mode 0.001g
Reproducibility
Moisture analysis mode
Preheating before weighing-in
Linearity ± 0.002 g
35°C - 160°C
Choice of steps at 1°C
0.03 %
(Initial weight 10 g)
Stabilization time (typical) 3 sec.
Recommended adjustment
weight, not added (class)
• 5°C….+35°C ambient temperature
Environmental conditions
• 45% - 75% air humidity non-condensing
Standard drying
Step-by-step drying
Heating profiles
Quick drying
Gentle drying
100g (E2)
[g] residual weight
[% M] moisture
[% R] dry mass
[% A] ATRO
DLT_N-BA-e-1421 5
Shutoff criterion
• Manual
Press stop button
• Time
Drying is finished after the set time, adjustable 1 – 99
minutes
• Autostop %
when the set weight loss (%) per time unit is lower
than the nominal value (both values adjustable)
• Autostop absolute
when the set weight loss (mg) per time unit is lower
than the nominal value (both values adjustable)
Data base for
drying programs
Interface RS 232C
Dimensions of the housing
moisture analyser (B x D x
H)
Available
drying room
Dimensions tablet
(B x D x H)
Sample dishes included Ø 100 mm
Net weight 4.5 kg
Electric Supply 220 – 240 V AC 50/60 Hz
Mains adapter moisture
meter
300 positions
210 x 340 x 225 mm
Ø 100 mm, 20 mm high
195 x 120 x 10 mm
9 V DC, 1000 mA
Mains adapter tablet 5.2 V 1.35 A
6 DLT_N-BA-e-1421
2 Appliance overview
The instrument comprises a drying unit (integrated balance + heating module) and a
tablet serving as terminal.
2.1 Overview
Pos. Designation
1 Sample chamber
2 Halogen lamp
3 Temperature sensor
4 Sample dish
5 Heating module
6 Balance
7 Levelling screw
8 Table mount
9 Tablet
Drying unit
Terminal
DLT_N-BA-e-1421 7
Front side:
Rear side:
2.2 Tablet
1 Touch screen 1 Audio loudspeaker
2 Front camera 2 Volume key
3 On / off key
4 Loudspeaker / headset port
5 Microphone
6 Micro USB 2.0 port
7 Rear camera
8 MicroSD card slot
8 DLT_N-BA-e-1421
3 Basic instructions
3.1 Proper use
The instrument purchased by you is designed for a fast and reliable determination of
material moisture in liquid, porous and solid materials by applying the method of
thermogravimetrics.
3.2 Improper Use
Impacts and overloading exceeding the stated maximum load (max) of the
instrument, minus a possibly existing tare load, must be strictly avoided.
Balance may be damage by this.
Never operate instrument in explosive environment. The serial version is not
explosion protected.
The structure of the balance may not be modified. This may lead to incorrect
weighing results, safety-relat ed faul ts and destruction of the moist ure anal yser.
The moisture analyser may only be used according to the described conditions.
Other areas of use must be released by KERN in writing.
3.3 Warranty
Loss of warranty due to
• Our conditions in the operation manual are ignored
• The appliance is used outside the described uses
• Modification or opening of the instrument
• Mechanical damage and damage caused by media, liquids
• Natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
3.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
moisture analyser and, if applicable, the testing weight, must be checked regularly.
The responsible user must define a suitable interval as well as type and scope of this
test. Information is available on KERN’s home page (www.kern-sohn.com) with
regard to the monitoring of balance test substances and the test weights required for
this. In KERN's accredited DKD calibration laboratory test weights and balances may
be calibrated (return to the national standard) fast and at moderate cost.
DLT_N-BA-e-1421 9
!
This instrument must be used exclusively for this purpose. Any other usage
may cause a risk to personnel, damage to the instrument or other material
!
The moisture analyser should be used mainly for the drying of aqueous
!
!
!
Carefully read this operation manual before setup and commissioning, even if
!
!
Careful when removing the sample. The sample itself, the sample dish and the
!
!
4 Basic Safety Precautions
4.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN balances.
All language versions contain a non-binding translation.
The original German is binding.
4.2 Personnel training
The instrument may only be operated and maintained by trained personnel.
4.3 Danger Information
WARNING
The moisture analyser is used to analyse the moisture content of materials.
damage.
substances.
The moisture analyser may not be used in a hazardous area.
The instrument may only be operated and maintained by trained personnel.
you are already familiar with KERN instruments.
Hazards during and after meas uring
Ensure correct installation of all components, see chap. 6.2
heating unit may be very hot.
Use the sample retainer at all times as it allows safe working and prevents
burns.
Individual parts of the case (e. g. the ventilation grids) may heat up
considerably during operation. Therefore, only take hold of the instrument by
the marked handles.
10 DLT_N-BA-e-1421
CAUTION
The moisture analyzer operates using heat!
CAUTION
Fire or explosion
WARNING
airways), induce nausea or result in death
+ Maintain sufficient space in t he environment of the instru m ent to
prevent heat build-up (distance from the instrument 20cm,
upwards 1m).
+ The heat extractor of the sample must never be covered, blocked,
taped up or altered in any other way.
+ Never place combustible materials on, under or nex t to the
instrument, as the environment of the instrument heats up to a
high temperature.
+ Careful when removing the sample. The sample itself, the sample
dish and the heating unit may be very hot.
+ Explosive, easily flammable samples and samples that go into a
chemical reaction when subjected to heat, may not be analysed
with the moisture analyser. Sample materials developing
aggressive vapours (e. g. acids) may cause corrosion problems on
some parts of the instrument.
+ If in doubt, conduct a risk analysis.
+ Select a drying temperature for samples of this kind that is low
enough to prevent ignition or explosion.
+ Wear safety goggles.
Substances that contain toxic or corrosive ingredients,
produce toxic gases when drying, cause irritation (eyes, skin,
+ Sample materials emitting toxic substances must be dried with a
special extraction system in place. Create an environment that
prevents the inhalation of vapours hazardous to health.
+ Sample materials developing aggressive vapours (e. g. acids) may
cause corrosion problems on some parts of the instrument.
DLT_N-BA-e-1421 11
5 T ransport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
instrument itself when unpacking for possible visible damage.
5.2 Packaging / return transport
Keep all parts of the original packaging for a possibly
required return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove
loose/mobile parts.
Reattach possibly supplied transport securing devices.
Secure all parts, such as the sample dish base, sample dish
holder etc. against slip pi ng and da mag e.
6 Unpacking, Setup and Commi s si oning
6.1 Installation Site, Location of Use
The instrument is designed to achieve reliable weighing results under normal
conditions of use.
You will work accurately and fast, if you select the right location for the instrument.
-
12 DLT_N-BA-e-1421
On the installation site observe the following:
!
!
!
!
!
!
!
!
!
should electromagnetic fields (e.g. due to mobile phones or radio instruments),
!
!
!
Remove explosion prone and easily flammable material in the immediate
vicinity.
Emerging vapours, sample di s h and all parts of the sample chamber are hot!
Protect the instrument against direct draughts due to open windows and
doors.
Avoid extreme heat and temperature fluctuations e.g. due to installation next
to radiators.
Do not expose the instrument to extreme dampness for longer periods of time.
Non-permitted condensation (condensation of air humidity on the instrument )
may occur if a cold instrument is taken to a considerably warmer environment.
In this case, acclimatize the disconnected instrument for ca. 2 hours at room
temperature.
Avoid direct sunlight
The air humidity should be between 45% and 75%, non-condensing.
Sufficient distance from heat-sensitive materials in area around instrument.
Protect the instrument against high humidity, vapours and dust,
Major display deviations (incorrect weighing results) may be experienced
static electricity accumulations or instable power supply occur. Change
location or remove source of interference.
Avoid static charging of the material to be weighed, weighing container and
windshield
Place the instrument on a firm, level surface.
Avoid jarring during weighing.
DLT_N-BA-e-1421 13
6.2 Unpacking and placing
1. Drying unit
Take the instrument carefully out of its packaging, remove the plastic jacket and
install it at the designated work space.
The instrument is supplied part-assembled. Immediately after unpacking check if the
delivered items are complete. Assemble the separate component parts according to
their sequence.
1. Windshield
2. Sam pl e di sh hol der
3. Removal aid
4. Sam pl e di sh
1. Put windscreen in sample chamber.
2. Carefully put sample dish holder on top.
3. Position removal aid in a way that the handle fits under the groove of the
cover.
4. Put sample dish on the dish holder.
14 DLT_N-BA-e-1421
5. Level instrument with foot screws until the air bubble of the water balance is in
the prescribed circle.
Check levelling regularly.
5. Tablet
Remove the tablet carefully from the packaging, remove plastic cover and install at
intended place of installation, using the table mount.
Charge the rechargeable battery.
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 8 hours.
6.3 Scope of delivery / serial accessories Drying unit Tablet
• Drying unit, see chap. 2
• 10 sample dishes
• Power cable
• Power pack drying unit
• Connecting cable
• Tablet see chap. 2
• Table mount
• Mains adapter
• Micro-USB cable
• RS 232 Bluetooth Adapter
“balance heating module“
• Operating manual
DLT_N-BA-e-1421 15
1 7 2 5 6 4 3
6.4 Connections
1. Drying unit
1. Connection of connecting cable “balance / heating module“
2. Connection net adapter „Balance“.
3. Power supply „heating module“.
4. Connection RS 232 „Bluetooth Adapter“
5. Connection of connecting cable “balance / heating module“
6. Main switch „heating module“
7. Adjustable foot screws
16 DLT_N-BA-e-1421
8. Housing screws
8
7
10
9
9. Housing screws (for access remove the foot screws)
10. Adjustable foot screws
11. Rigid foot screw
DLT_N-BA-e-1421 17
Rear side:
2. Tablet
1 Audio loudspeaker
2 Volume key
3 On / off key
4 Loudspeaker / headset port
5 Microphone
6 Micro USB 2.0 port
7 Rear camera
8 MicroSD card slot
18 DLT_N-BA-e-1421
6.5 Mains connection
Power is supplied to the integrated balance via the external power unit. The stated
voltage value must be the same as the local voltage. Only use original KERN mains
adapters. Using other makes requires consent by KERN.
Power supply to the heating module is provided via the supplied mains cable. Do not
connect the instrument to the power grid unless the information on the instrument
(sticker) matches the local mains voltage.
The instrument must be connected to a standard socket with earth terminal. Do not
eliminate the protective effect by using an extension lead without earth terminal. For
power supplies from power grids without earth terminals call a specialist to establish
equivalent protection according to the relevant installation regulations.
6.6 Commissioning
+ Established connections according to diagram and connect to power
supply. Make sure that the tablet is turned off during the connection.
Turn on drying unit at master switch.
After the turn on check, the drying unit will be in default “tablet“ mode.
DLT_N-BA-e-1421 19
If not, activate it by following the steps below:
In weighing mode, press and hold pressed until the audio signal
stops. Release the key and the menu item “units“ will appear.
Press repeatedly until “tbL mode“ appears.
Acknowledge with . The current setting will be displayed.
Press to select the setting ”tabl on“.
Acknowledge with . Wait until „tablet“ appears.
+ To turn on the tablet, press and hold the tablet’s on/off key for approx.
two seconds.
+ To unlock tap and drag onto .
20 DLT_N-BA-e-1421
+ The start screen will appear.
+ Ensuring Bluetooth connection
When enabled, the icon for Bluetooth will be shown in the top right
corner.
+ To start application “moisture analysis“, use .
DLT_N-BA-e-1421 21
+ Wait for Bluetooth connection, whereupon the start screen will appear.
+ Setting operator language
On delivery the display is set to German.
Setting additional languages:
Tap <Settings>.
Tap <Language & input>.
Tap <Language>.
22 DLT_N-BA-e-1421
In dropdown menu select the desired
Initial Commissioning
In order to obtain exact results with the electronic balances, your balance
be connected to
The accuracy of the weighing system depends on the local acceleration of
Strictly observe hints in chapter Adjustment.
language.
must have reached the operating temperature
(see warming up time chap. 1).
During this warming up time the weighing system must
the power supply (mains, accumulator or battery).
To adapt the balance to ambient conditions, open wind screen doors.
gravity.
DLT_N-BA-e-1421 23
6.7 Call-up weighing mode
Press in table mode, “tbl mode” will be shown.
Press to confirm, “tabl on“ will be shown.
Press to select setting “tabl oFF“.
Acknowledge with . Wait until weighing mode is shown.
6.8 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the moisture analyser from the power supply.
Only use accessories and peripheral instruments by KERN, as they are ideally tuned
to the instrument.
24 DLT_N-BA-e-1421
6.9 Adjust balance
We recommend carrying out adjustment in adjustment mode “external standard“
based on weights of different nominal values, however, from a metrological point
sohn.com.
In weighing mode tap the top right corner
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature. To
receive accurate measuring values it is also recommended to adjust the balance
periodically in weighing operation.
• Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
• Carry out adjustment with placed sample dish. Ensure that no objects are within
the sample dish.
•
(See chap. 10.5). Here the adjustment tak es place near the maximum load of
the balance (recommended adjustment weight see chap. 1).
Adjustment in adjustment mode “external user define“ can also be carried out,
of view this does not produce best results.
• Info about test weights can be found on the In t ernet at: http://www.kern-
Call function:
of the control button .
Wait until the weighed value for the
required adjustment weight appears
flashing.
DLT_N-BA-e-1421 25
To view/issue an adjustment protocol, call the
During the flashing display put the
required adjustment weight carefully in
the centre of the sample dish.
After successful adjustment the balance
automatically returns to weighing mode.
Take away adjustment weight
following menu item (See chap 10.5 ):
<Settings>
<Adjustment>
<Adjustment protocol>
26 DLT_N-BA-e-1421
7 Operating elements
In “tablet mode” the keys of the drying unit will be disabled (with the
exception of ON/OFF). Use the tablet for all actions.
7.1 Start screen
DLT_N-BA-e-1421 27
1
2
3
Call-up function menu:
Status display
Tap and hold: Set standby temperature:
User specific shortcut keys (M1- M5) for calling up the 5 most
frequently used dry ing programs
Function keys (Pre tare, zero setting / tare, pri nt)
4
5
6
7
8
9
10
11
Link to android service programs
Back to previous screen
Tap twice: Exit application “moisture meter“.
Back to start screen
Return to application “moisture meter“
Current temperature; higher temperatures will also be indicated by the
warning icon .
Call up menu
Invoke adjustment
Select user profile
28 DLT_N-BA-e-1421
7.2 Work screen
The work screen is shown at the start of measuring, see chap. 11.
Drying process active
1
2
3
4
5
6
7
Instructions for the performance of tasks during measuring
Weighing guide; only shown when function is enabled, see chap. 11.1.4
Enter tare value numerically
Start drying; only shown for setting <manual start mode>, see chap. 10.1
Taring / Setting to zero
Designation for current drying program
DLT_N-BA-e-1421 29
8 Simple weighing / taring
In order to obtain exact weighing results, the integrated balance must have
reached its operating temperature (see warming up time chap. 1).
8.1 Weighing:
Ensure weighing mode
Wait for zero display, reset to zero using
0/T.
Place goods to be weighed on balance.
Wait until the stability display appears
[ ].
Read weighing result.
8.2 Taring:
1. Put weighing container on the weighing pan.
2. Wait until the stability display ( ) appears, the n t ap 0/T button.
3. After standstill control the zero display appears. The weight of the container is
now internally saved.
4. Weigh the material.
5. Wait until the stability display appears ( ).
6. R ead net w ei g ht.
8.3 Default tare (pre tare)
Where the tare weight is known, you can enter this numerically.
Tap control button .
Enter known tare weight (such as 17 g) and import by pressing <OK>.
The weight display will show the negative tare weight.
To delete pre tare, enter “0”.
30 DLT_N-BA-e-1421
9 User profile
Enter “user name“ in numeric input window and import
In this menu 10 user profiles can be created, processed or deleted.
Each user will be assigned to a profile with his own specific settings (basic settings of
the instrument, hole data memory).
Factory setting is „Default“, this cannot be deleted or renamed.
Tap top right corner of control button .
Tap control button <Profiles>, the
dropdown menu will appear.
Create new user profile
< New profile >
by pressing <OK>.
< Rename >
< Copy >
< Delete >
Rename user profile
Copy user profile
Delete user profile
DLT_N-BA-e-1421 31
10 Setup m e nu
In this menu item the user-specific basic settings of the instrument take place. The
settings are stored together with the active user profile and remain valid if working
with that profile. If a user profile is called up, the respective settings are automatically
loaded, see chap. 9.
Invoke setup menu:
Tap top right corner of control button .
To call the setup menu, tap the
<Settings> button and the dropdown
menu will appear.
To call and change individual settings,
simply tap on the screen.
32 DLT_N-BA-e-1421
10.1 Heating module settings
Tap <Heater parameters>, see chap.: 10. The available settings will be
displayed.
<Standby-temperature>
Settings:
<Start mode>
<Start delay>
Off
Standby
Temperature
Switched off
The numeric input window will be
displayed. Enter required
temperature
selectable 35°C – 100°C.
To import press <OK>. The display
returns to the previous screen.
Settings:
Manual
Measuring will start as soon as you
tap the control button „OK“
Automatic
Measurement will start automatically
after closing the sample chamber.
Settings:
Enter the desired time, selectable from 0-30 sec. in the
numeric input window.
To import press <OK>. The display returns to the
previous screen.
DLT_N-BA-e-1421 33
< Stability test >
< End acoustic signal>
< Temperature test >
< Heater adjustment data >
Settings:
On
Stability control before start of
measurement switched off
Av
Stability control before start of
measurement switched off
Settings:
On
Off
Switched off
When turned on, an audio signal will
be sounded as soon as the test is
finished.
See chap. 6.9.2
See chap. 6.9.2
34 DLT_N-BA-e-1421
10.2 Balance settings
Tap <Weighing parameters>, see chap: 10. The available settings will be
displayed.
< Filter >
Settings:
This menu item allows the
balance to be set according to
specific ambient conditions and
measuring purposes.
< Stability >
<Autozero>
Under this menu item the
automatic zero point correction
can be switched on or off. In
switched-on-state the zero point
is automatically corrected at drift
or when dirty.
Filter 1
Filter 2
Filter 3
Settings:
Stability 0
Stability 1
Stability 2
default setting
Stability 3
Settings:
Auto zero off
Autozero 1
Autozero 2
Autozero 3
Setting for dosage
The balance reacts quickly and in a
sensitive manner, very quiet set-up
location.
The balance reacts slowly and in a
robust manner, busy set-up location
Very quiet setup location
Very setup location.
Auto Zero switched off
Auto Zero range ± ½ Digit
Auto Zero range ± 3 Digits
Auto Zero range ± 7 Digits
Autozero 3E
Auto Zero range ± 7 digits in the
whole weighing range
DLT_N-BA-e-1421 35
10.3 Peripheral equipment
Tap <Peripheral>, see chap: 10. The available settings will be displayed.
< Printer selection >
Settings:
< Print at stability >
<Print heading>
As headline can be defined 4
lines with 40 characters each
< Line feed>
Line feed at the end of the
printout.
DPP-250 Setting for KERN YKC-01
DPP-350
Settings:
On
Off
Stability check before data transfer on
Stability check before data transfer off
Settings:
Off
On
Line 1 In setting <ON> tap corresponding line and
Line 2
Line 3
Line 4
Printout header line disabled
Printout header line enabled
enter your text in the displayed input window,
then import by pressing <OK>.
Settings:
Enter desired number in numeric input window.
<GLP>
Settings:
On
GLP-printout enabled
<Print time and date>
(for disabled GLP function
only)
Off
Settings:
On
Off
GLP-printout disabled
Print date/time on test certificate
Do not print date/time on test certificate
36 DLT_N-BA-e-1421
10.4 Adjustment
Tap < Calibration settings > see, chap: 10. The available settings will be
displayed.
< Calibration data >
View or print adjustment protocol:
< Calibration mode >
Settings:
External
default
Standard
(default
setting)
External
custom
Here the adjustment takes place near the
maximum load of the balance
(recommended adjustment weight see
chap. 1).
Weights of different nominal values may
be used here for adjustment but are not
optimal for technical m easur i ng .
DLT_N-BA-e-1421 37
10.5 Colour of displa y
Tap <Appearance >, see chap: 10. The available settings will be displayed.
Select desired colour:
38 DLT_N-BA-e-1421
10.6 Service menu
Tap <Service >, see chap: 10.
The available settings will be displayed.
The changes to service menu settings described below must be made by
expert staff with profound knowledge of balances.
< Backup and reset system data >
< Administration of database >
< Reset to default settings >
< Update software of balance>
< Technical service of balance> (Password: 1234“)
< Technical service of heating module> (Password: 1122“) see chap. 6.9.2.2
DLT_N-BA-e-1421 39
11 Drying parameters
The optimum drying parameters (drying temperature, drying period) depend on the
type and size of the sample and the required accuracy of the measuring result. The
exact parameters can only be determined by experiments.
You will find examples taken from actual use in our application manual, available
from our KERN home page (www.kern-sohn.com).
The instrument offers the possibility to set the drying parameters sample-specific
manually or to load a suitable drying program with the required drying parameters
from the database.
11.1 Setting the drying parameters manually
Tap < Moisture Determination >.
Tap < Manual parameters set up >
The dropdow n men u for dry i ng
parameters will appear.
40 DLT_N-BA-e-1421
11.1.1 Se tting the heating profile
optimally to the used sample.
This heating profile is suitable for samples
controlled down to the set value.
This function offers different heating profiles to adapt the drying characteristic
Tap < Heating profile > in dropdown menu
(see chap. 11.1).
The available heating profiles are displayed:
• Standard
• Fast
• Ramp
• Steps
1. Standard drying
This heating profile are used for most
samples. The sample will be heated up to the
Display pictogram during drying
set drying temperature,
selectable 35°C -160°C
Tap < Standard >.
2. Quick drying
Display pictogram during drying
The numeric input window will be displayed.
Enter required drying temperature,
selectable 35°C – 160°C.
Import entry with <OK>, the display returns to
the previous screen.
with high moisture content (e.g. liquids).
After start the selected temperature will be
exceeded for a short time - to compensate
the evaporation coldness and to accelerate
the drying process.
Then the temperature is automatically
Tap < Fast >.
The numeric input window will be displayed.
Enter required drying temperature, selectable
35°C – 160°C.
Import entry with <OK>, the display returns to
the previous screen.
DLT_N-BA-e-1421 41
temperature, can be selected.
3. Gentle drying
Display pictogram during drying
This heating profile is suitable for the soft
drying of substances, which tend to skin
formation (e.g. substances containing
sugar or volatile substances). Skin
formation will then affect the evaporation
of the trapped moisture. The temperature
is permanently increased and reaches the
selected drying temperature only after
finishing the so called ramp duration. The
ramp, i.e. the period between start of
drying process and reaching the drying
Tap < Ramp >.
Selectable parameter s :
Drying temperature: 35°C - 160°C
Ramp duration: 1 – 15 minutes.
Tap the respective control button, the
numeric input window will appear. Enter
required drying temperature or ramp
duration.
Import entry with <OK>, the display returns
to the previous screen.
Note:
If the drying temperature in the set ramp
duration cannot be reached, an error
message will appear. Increasing ramp
time.
42 DLT_N-BA-e-1421
4. Step-by-step drying
Display pictogram during drying
This heating profile is suitable for drying
substances which consist of several
components (such as etheric oils), which
evaporate at different temperatures or of
substances which present a specific
behaviour when being warmed up. 3 steps
can be selected. For the individual steps
are freely selectable drying temperature
and duration. In the last step the switch-off
criterion finishes th e meas ur e me nt.
Tap < Steps >.
Enter temperature and time for every
level.
Selectable parameter s :
Step temperature: 35°C - 160°C
Duration (step 1 and 2): 1 – 99
minutes
Display examples level 1
Import entry with <OK>, the display returns
to the previous screen.
DLT_N-BA-e-1421 43
11.1.2 Sh u to ff criterion
A switch-off criterion defines when the instrument has to finish the drying process.
The switch-off criteria make sure that the measurements are always finished under
the same conditions thus providing repeatable measurements.
Tap< Shutoff Criterion > in dropdown menu
(see chap. 11.1).
The available switch-off criteria are
displayed:
• Manual
• Time
• Autostop %
• Absolute auto stop
Note:
Independent on the selected setting, measurement
can be finished at any time by tapping the control
button .
1. Manual Measurement will be finished by tapping the
control button .
2. Time
Measurement will continue until the set drying
period has elapsed
Tap < Time > and the numeric input window
will appear. Enter required drying period,
selectable 1 -99 minu t es .
To import press <OK>. The display returns to
the previous screen.
3. Autostop %
This switch-off criterion is based of the loss of
weight (% humidity) per time unit. Measurement
is finished, when the set weight value per time
unit is lower than the nominal value, both values
being freely adjustable [% / sec].
Tap < Autostop % >.
Tap loss of weight (variation in %) or time
unit and enter desired v al ue.
44 DLT_N-BA-e-1421
Selectable parameter s :
Variation: 0.1 - 10.0%
Selectable parameter s :
Time unit: 1 – 99 s
To import press <OK>.
4. Absolute auto stop This switch-off criterion is based of the
weight loss (mg) per time unit.
Measurement is finished, when the set
weight value per time unit is lower than
the nominal value, both values being
freely adjustable [mg / sec].
Tap < Autostop absolute >.
Tap loss of weight (variation absolute) or
time unit and enter desired value.
Weight loss: 1 - 60 mg
Time unit: 1 - 99 s
To import press <OK>.
DLT_N-BA-e-1421 45
11.1.3 Preheating (before weighing-in)
If needed, the function „preheating“ can be enabled for preheating the sample
chamber prior to beginning the actual measurement.
A preheated device may affect the consistency of the results as the device keeps the
same temperature status for each measurement. Preheating will take place up to the
point of measuring, in standby mode (For setting see chap. 7, [2]) including after
finished measuring.
Tap < Preheating > in dropdown menu
(See chap. 11.1).
<Off> Function deactivated
<On> Function activated
Procedure when function is enabled:
Prior to starting the measurement,
the instrument starts heating up on
the set drying temperature.
If necessary close the sample
chamber, preheating will start.
You may stop preheating during the
preheating period by tapping
and after weighing the sample
measurement can be started.
For standard applications preheating normally is not required.
46 DLT_N-BA-e-1421
11.1.4 Weighing assistance
The weigh-in aid facilitates the weighing-in of the samples on a nominal value with
adjustable tolerance range. This is especially useful, when samples with the same
weight are processed. This will increase reproducibility of the measurement results. If
all samples are weighed-in within the tolerance range, this will increase repeatability.
Tap < Weight check > in the dropdown
menu (See chap. 11.1).
Function deactivated
<Disabled> Function deactivated
Function activated
<Enabled> Function activated
With the function enabled, enter target
weight, lower and upper weight limit one
after the other, and import by pressing
<OK>.
Nominal weight:
Nominal weight
Min. weight:
Lower weight limit
Max. weight:
Upper weight limit
DLT_N-BA-e-1421 47
Return to menu by .
48 DLT_N-BA-e-1421
11.1.5 Res ult display
ATRO %M:
drying drying
This function will define the unity where the measuring results are displayed and
printed out.
Calculation:
% M: Moisture content
Before After
drying drying
% D: Dry content
Before After
drying drying
ATRO moisture content
Display shows the moisture content of the sample as a
percentage of the wet weight
(W = wet weight = starting weight = 100%)
Wet weight W – dry weigh t D
M [0…-100%]
Wet weight W
x 100%
Display shows dry material content of sample as a
percentage of the wet weight
(W = wet weight = starting weight = 100%)
Dry weight D
D [100…0%]
Wet weight W
x 100%
Display shows moisture content of the sample as a
percentage of the dry weight
(D = dry weight = final weight =100%)
Wet weight W – dry weigh t D
x 100%
Dry weight D
Before After
ATRO
[0…-999%]
g: Residual weight in grams Display shows the weight of the sample in grams.
ATRO is a unit which is exclusively used in the timber industry.
DLT_N-BA-e-1421 49
Settings:
After having entered all drying parameters, you can start the drying cycle by tapping
the top right corner, see chap. 12
Tap < Units > in dropdown menu (See
chap. 11.1).
Selectable display ty pes:
Moisture (%M)
Dry weight (%R)
Atro (%A)
Residual weight (g)
Note:
You can switch over during or after
weighing to the available units, see chap.
12 “Switch over result display“.
50 DLT_N-BA-e-1421
appear. The database will be empty when
in the top right
11.2 Save drying parameters in database
Tap < Moisture Determination >.
Tap <Database para met ers set u p> .
The dropdow n men u for data records will
started up for the first time.
To create a new data record (drying
program), tap the icon
corner.
The list of parameters will appear.
DLT_N-BA-e-1421 51
11.2.1 Creating a new drying program (data record):
Call parameter dropdown menu, see chap.
11.2
Tap <Record name> and the input
window will appear.
Enter name (such as maize silage) for
the new drying program (max. 30
characters) and import by pressing
<OK>.
Then enter all drying parameters:
Description (max. 30 characters)
For heating profile, see chap. 11.1.1
For cut-off criteria, see chap. 11.1.2
For preheating, see chap. 11.1.3
For weighing guide, see chap. 11.1.4
For result display, see chap. 11.1.5
Occupancy shortcut keys,
selectable: From M1, M2, M3, M4, M5
To save the new data record to database,
press .
The list of saved drying programs will be
displayed.
52 DLT_N-BA-e-1421
11.2.2 Change / delete drying programs (data record)
Tap <Moisture Determination>.
Tap <Database para met ers set u p> .
The dropdown menu for data records will
appear.
Highlight the data record to be
edited by tapping on it.
To highlight all data records, tap icon
and select < Select all >
Press to change drying parameters.
Import changes with .
or
Delete data record with .
To import query, press <OK>.
DLT_N-BA-e-1421 53
in order to load a program suitable for the
12 Carrying Out Measurement
During the first start-up set the drying parameters as described in chap. 11.
(1) Start-up
Turning on moisture meter, see chap. 6.6. In order to obtain exact results, the
instrument must have reached its operating temperature (see warm-up time
chap. 1). For this warm-up time the instrument must be connected to the power
supply.
(2) Select drying program
Tap <Moisture Determination>.
There are three options for loading the work
screen (See chap.7.2) used to start a drying
cycle:
Either
Set drying parameters manually in <
Manual parameters setup >,
See chap. 11.1.
or
Tap < Database parameters setup >
sample from the database (See chap.
11.2.
or
Use the shortcut keys M1-M5,
provided they are enabled (See chap.
11.2.
54 DLT_N-BA-e-1421
<Manual parameter setting>
After setting all drying parameters, tap the
control button the top right corner. Th e
work screen will appear, showing the
previously set parameters.
< Database parameter settings >
Load desired drying program from the
dropdown menu by tapping.
or
Use to search names in the dropdown
menu.
The drying parameters of the selected data
record will be shown in the blue window.
Tap control button top right corner.
The work screen for the selected drying
program will appear.
DLT_N-BA-e-1421 55
S hor tcut keys
Tap shortcut key (M1 –M5).
The work screen for the selected drying
program will appear.
56 DLT_N-BA-e-1421
(3) Carrying Out Measurement
Step 1: Preheat
Work screen without preheating,
see chap.11.1.3
Sample display: W ork screen with weighing
guide disabled, see chap: 11.1.4
Work screen with preheating,
see chap.11.1.3
The display may prompt you to close the sample
chamber.
Sample display: W ork screen with weighing
guide enabled, see chap: 11.1.4
Close sample chamber, preheating will start.
The warning symbol will be displayed for
temperatures > 50°C.
You may stop preheating during the preheating
period by tapping .
Step 2: Determining the initial wei ght of a sample
Put an empty sample dish on the
sample dish holder and move it to the
sample chamber.
T are empty sample dish.
Place sample in sample dish.
For details with enabled weighing guide,
(see chap. 11.1.4) Determine the target
weight ±tolerance as described below.
DLT_N-BA-e-1421 57
Working with the weigh-in aid:
The bar graph display moves from the left
to the right and proceeds equally to the
weight loaded onto the weighing balance.
yellow:
Weighed-in < lower weight value
green
Target weight within the weight limits
Step 3: Start drying
red:
Weighed-in > upper weight limit
Measuring will start independently on the
setting „Start mode“, see chap. 10.1
Automatic
Manual
Measurement will start
automatically after closing
the sample chamber.
Measuring will start as soon
as you tap the control
button .
Measuring will start independently on the
settings „Start delay“ and „Stability
control“, see chap. 10.1
58 DLT_N-BA-e-1421
Step 4: Display during drying process
You can watch the drying process on the display unit.
The drying progress is shown continuously as a graphic display.
The display shows the selected settings.
To interrupt the drying process tap control button .
3
1. Display of results, tap for switching over
2. Current measured value in %
3. Current temperature
4. Display of drying graph
5. Android®-specific navigation elements
6. Current weight loss / time unit
7. Shutoff criterion
8. Heating profile
9. Drying process active
DLT_N-BA-e-1421 59
Switch over display of result
Tap result display of result and import desired unit into dropdown menu
(such as [g] ).
Switching in graphic display
The display may be zoomed in or out by tapping the diagram.
60 DLT_N-BA-e-1421
Step 6: End of measurement, display/printout measuring resul ts
The end of the drying process will be indicated by an audio signal, provided this
has been enabled in the menu (menu settings <end audio signal “ON”>), see
chap. 10.1) whereupon heating will be turned off.
The displayed control buttons provide the following options:
Display of set drying parameters
Saving measurement results, see step 7.
Carrying out additional measurements with the help of the
current drying program
If an optional printer is connected, a printout of the measuring
protocol with drying graph will be issued.
If an optional printer is connected, a printout of the measuring
protocol without drying graph will be issued.
DLT_N-BA-e-1421 61
Sample protocols (KERN YKC-01):
62 DLT_N-BA-e-1421
Step 7: Save measurement results (max. 300 measurement results)
Tap control button . .
Enter data record name and designation and import by pressing .
The database results will be displayed.
DLT_N-BA-e-1421 63
13 Cal l up / edit / delete measurement results
13.1 Calling measurement results
Tap <results>.
Tap <database results>.
The list of data records will be displayed.
Select data record.
Tap
The selected measurement result will be
displayed.
64 DLT_N-BA-e-1421
13.2 Changing / deleting measurement results
Tap <results>.
Tap <database results>.
The list of data records will be displayed.
Highlight the data record to be edited
by tapping
or
To highlight all data records, tap icon
and select < Select all >
Press to change drying
parameters. Import changes with .
or
Delete data recor d with .
To import query, press <OK>.
DLT_N-BA-e-1421 65
appear. The database will be empty when
To create a new data record, tap the icon
14 GLP
1. <Manual setting>
Tap <GLP settings>.
Select desired setting.
2. <Data base>
Tap < Manual setup >.
Selectable parameter s :
Id Balance
Id Project
Id User
Tap the respective control button, the
numeric input window will appear.
Import entry with <OK>, the display returns to
the previous screen.
Use this function to store several GLP users and
to modify or to delete existing ones.
Tap < Database >.
The dropdown menu for data records will
66 DLT_N-BA-e-1421
started up for the first time.
in the top right corner.
Tap <Record name> and the input
window will appear.
Enter designation (max. 30 characters)
and import by pressing <OK>.
Then enter all the other parameters:
Id Balance
Id Project
Id User
To save new data record to database,
press .
The list of data records will be displayed.
Highl ig ht the data record to be edited by
tapping
or
To highlight all data records, tap the icon
and select <Highlight all>.
Press to change parameters.
Import changes with .
or
Delete data record with .
To import query, press <OK>.
DLT_N-BA-e-1421 67
15 General information concerning moisture anal ysis
15.1 Application
In all cases where moisture is added to or removed from products, a fast
determination of the moisture content is of enormous importance. For countless
products the moisture content is not only a quality feature but also an important cost
factor. Very often fixed limits for moisture content apply to the trade in industrial or
agricultural goods as well as chemical or food products which are defined by terms of
delivery and general standards.
15.2 Basics
Moisture does not only mean water but includes all substances that evaporate when
heated up. In addition to water this includes,
Fats
Oils
Alcohol
Solvents
etc...
There are various methods to analyse moisture in a product.
KERN DLT uses a method called thermogravimetrics. In accord with this method, the
sample is weighed before and after heating, determining the material moisture by
looking at the difference.
The conventional drying chamber method follows the same principle, with the
exception that this method requires a considerably longer measuring period. . In
accord with the drying chamber method, the sample is heated from the outside to the
inside by a hot air current, so as to remove the moisture. The radiation applied in the
KERN DLT penetrates mainly the sample in order to be transformed inside it into
heat energy that is, warming from the inside to the outside. A minor amount of
radiation is reflected by the sample, a reflection that is less in dark samples than in
light-coloured ones. The depth of penetration of the radiation depends on the
permeability of the sample. In samples of low permeability the radiation only
penetrates the outer layers of the sample, possibly resulting in imperfect drying,
incrustation or burning. For that reason the preparation of a sample is of great
importance.
15.3 Adjustment to existing mea suring method
Quite frequently the KERN DLT replaces a different drying method (such as a drying
cabinet) as the KERN DLT achieves shorter measuring times during a simplified
operation. For that reason the conventional measuring method must be matched to
the KERN DLT in order to achieve comparable results.
• Carry out parallel measurement
• Result of KERN DLT does not match reference
+ Repeat measurement with changed temperature setting
+ Vary shutoff criterion
68 DLT_N-BA-e-1421
15.4 Preparing a sample
Preparing a sample from solids:
• fast evaporation due to a greater surface
Prepare one sample at a time for measuring. This prevents the sample from
exchanging moisture with its surroundings. If several samples have to be taken at the
same time, they should be packed in airtight boxes so that they do not undergo
changes during storage.
To receive reproducible results, spread the sample thinly and evenly on a sample
dish.
Patchy spreads will produce inhomogeneous heat distribution in the sample to be
dried resulting in incomplete drying and increased measuring time. Sample clusters
generate increased heating of the upper layers resulting in combustion or
incrustation. The high layer thickness or possibly arising incrustation makes it
impossible for the moisture to escape from the sample. Due to this residual moisture,
measured results calculated in this way will not be comprehensible or reproducible.
• Spread powdery or grainy samples evenly on the sample dish.
• Grind coarse samples using a mortar or a shredder. When grinding the sample avoid
any heat supply as this may cause loss of humidity.
Preparing a sample from liquids:
For liquids, pastes or melting samples we recommend to use a glass fiber filter. The glass
fiber filter has the following advantages:
• even distribution thanks to capillary attraction
• no formation of droplets
DLT_N-BA-e-1421 69
15.5 Sample material
Easy to determine are usually samples with the following characteristics:
Grainy to powdery, pourable solids
Thermally stable materials, emitting the moisture to be determined
easily without other substances evaporating at the same time
Liquids that vaporize to leave a dry substance without developing a film
Difficult to determine may be samples that are:
Glutinous or sticky
Become incrusted easily or tend to form a film
Decompose easily under the influence of heat or emit various elements
15.6 Sample size / originally weighted in quantity
Drying times, as well as achievable accuracy, are significantly influenced by sample
distribution. In the course of this arise two opposed requirements:
The lighter the originally weighted in quantity, the easier it is to achieve shorter drying
times.
However, the heavier the originally weighted in quantity, the more accurate a result.
70 DLT_N-BA-e-1421
15.7 Drying temperature
Bear in mind the following factors when setting the drying temperature:
15.7.1 Surface of the sample:
Compared with powdery or grainy samples, liquid and spreadable samples have a
smaller surface for the transmission of heat energy.
The use of a glass fibre filter improves the heat application.
15.7.2 Colour of sample:
Light-coloured samples reflect more heat radiation than dark ones and therefore
require a higher drying temperature.
15.7.3 Availability of volatile substances:
The better and faster the water or other volatile substances can be disposed, the
lower a drying temperature is required. If water is difficult to get to (e. g. in
synthetics), it has to be calcined at high temperatures (the higher the temperature,
the higher the water vapour pressure).
Results equivalent to other moisture analysing methods (e. g. drying chamber) can
be achieved by experimentally optimising the setting parameters such as
temperature, heating level and shutoff criteria.
15.8 Recommendations / Guidelines
15.8.1 Prepare standard sample:
Chop up sample, as required, and spread it evenly on the sample dish.
15.8.2 Prepare special samples:
For sensitive or hard to spread test materials (e. g. mercury) a glass
fibre filter is available for use.
Apply the sample equally on the glass fibre filter and cover it with a
second glass fibre filter .
The glass fibre filter is also useful as a protection when splashing
materials are dealt with (each splash falsifies the final result).
DLT_N-BA-e-1421 71
Drying
(min)
Solid
(approx.)
ABS (Novodur P2H-AT)
10
60
10
0.11
Accumulator lead
10
110
2.6
0.19
Acryl granulate
10-15
80
12
0.18
Activated carbon
10
80
9.8
13.33
Activated carbon
7.6
80
4.1
6.12
Sliced pineapple
5
110
14.4
6.71
Sliced apple (dry)
5-8
100
10-15
76.5
Sliced apple (humid)
5-8
100
5-10
7.5
Artesan powder
0.5
80
3.5
98.44
Aspartame granulate
0.5
105
3.4
96.84
Bath milk 3 80
27.4
83.87
Cotton seed
3-4
110
6.3
6.8
Blue-veined cheese
2
160
13.3
53.06
Body lotion
3
80
31.6
87.76
Beans
4.5
150
9.7
11.85
Butter
1.7
140
4.3
84.95
Acetyl cellulose
5.5-6
50
1.3
0.81
Chinese Virility powder
2.5-3
110
5.5
6.24
CN photographic paper
2
150
6.4
5.81
Cornflakes
2-4
120
5-7
9.7
Roof tile mass
2.5
160
10
81.74
Roof tile mass
7
160
20
81.74
Dialysis membrane
(Polyethes – polycarbonate)
Dialysis membrane
(Polyethes – polycarbonate)
Indoor sealing compound
3
160 7
64.04
Dispersion adhesive
1.5
140
9.5
55.69
Dispersion adhesive (watery)
2.5
155
7.2
43.77
Dolomite
10-12
160
6.1
0.06
Printer ink fluid
1.5
120
10
19.15
E-filter dust of waste
incineration
Peas, „danish yellow“
3.5
135
7.9
15.19
Peanut cores
2.8
100
4
1.97
Peanut cores
3
100
6
3.2
Refreshment candies
3-3.4
90
2.9
0.29
Dye powder
1.5
120
3.5
99.07
Fine ceramic mass
2.5
160 9
86.89
Film waste
8-9
60
1.2
0.4
River water
4
160
20
99.2
Fudge/sugar mass
5
130
20 8
Formaldehyde urea dispersion
2
155
7.6
34.07
Cottage cheese
1.4
70
15
41.03
Forage pellets
3-4
150
5.7
6.35
Dried beans
3-4
105
5
7.3
Dried peas
5-7
110
9.6
5.89
Dried carrots
5.5-6
120
3
4.92
Dried chicken dung
4
140
8
14.81
Dried corn
5-7
110
10
6.21
Glass powder
8-10
160
5
0.26
15.8.3 Table of applications:
Material
Weight
Sample
(g)
0.5 80 2.2 7.85
Drying
temperature
(°C)
period
(approx.)
Moisture
%
(approx.)
body
%
0.5-0.7 80 2.0 7.86
7-10 135 7 26.23
72 DLT_N-BA-e-1421
Material
Drying
(min)
Solid
(approx.)
Setting lotion
0.01
145
9
98.76
Setting lotion (extra strong)
1
130
8
97.85
Hair styling gel
5
105
37.0
94.71
Oat flakes
2
105
5.6
9.35
Hazelnut cores
2.2
100
3.8 4
Hazelnut cores (peeled)
2.6
100
4.5
3.74
Hydranal sodium tatrate – 2
– hydrate
Yoghurt
2-3
110
4.5-6.5
86.5
Coffee 2 150
8
4.99
Coffee cream
2-3
130
6-8
78.5
Coffee seed
3.5-4
120
8
8.53
Cocoa
2.5
105
4
3.45
Cocoa seed
4-5
130
7.8
6.23
Limestone
12-14
160
5
0.05
Potato powder
2.5-3.0
130
5.8
12.46
Potato chips
3-4
106
7.5
6.9
Ketchup 2 120
18
74.44
Silica gel
9.5
115
4,5
0.63
Adhesive
2-5
136
6-8
54.3
Garlic, powder
2
100
7.3
5.36
Coal powder
4
160
3.4
2.11
Chalk (natural)
8
160
1.7
0.06
Crystal sugar
3
90
2.8
0.05
Synthetic resin dispersion
(diluted)
Latex
1-2
160
5.2
38.64
Latex LE1
3-5
125
10.8
46.58
Latex LE2
3-5
125
9.4
50.37
Latex O44
3-5
125
9.4
50.65
Lentils 4 135
5.4
12.49
Loam soil
10-15
160
5.5
9.89
Loam clay
2.5
160
14.5
80.75
Skim milk powder
4
90
5.5
3.67
Low fat curd cheese
1.2
130 8
18.5
Corn starch
2
160
5.2
89.1
Almonds (caramelised)
3.5
80
4.8
1.81
Almonds (natural)
2.5
100
5.3
4.19
Almonds „californian“
3
100
5.3
4.34
Margarine
2.2
160
4
19.15
Brick mass
7
160
20
80.13
Mayonnaise
1-2
138
10
56.5
Flour
8-10
130
4.5
12.5
Micronyle
7-8
60 8 0.4
Milk
2-3
120
6-8
88
Milk powder (MMP)
4.5
100
6.3
2.46
Milk powder (VMP)
4.5
100
5.5
2.56
Mozzarella
1.5
160
11.1
45.78
Multivitamin candies
3-3.4
115
3.3
0.4
Natural latex
1.4
160
5.3
42.56
Nougat mass
2.5
103
10
0.6
Noodle dough
0.55
160
5
12
Concentrated orange juice
2-3
115
13
52.1
Weight
Sample
(g)
1.6 160 12 15.67
Drying
temperature
( °C)
period
(approx.)
Moisture
%
(approx.)
body
%
2 160 5.9 60.21
DLT_N-BA-e-1421 73
Drying
(min)
Solid
(approx.)
Paper
2-4
106
10
6.4
PA 6 (Ultramide B3WG5)
10
60
10
0.05
PA 6.6 (Ultramide B3WG5)
10
80
10
0.15
PBTP (Crastin SK645FR)
10
80
10
0.05
PC (Macrolon 2805)
10-12
80
15
0.08
PC/ABS (Babyblend T65MN)
9-11
80
10
0.12
Pepper, black, powder
2
85
8,8
7.97
PMMA (Plexiglass 6N)
10
70
10
0.12
Polypropylene
13
130
9
0.23
Polypropylene
3,3
120
2,2
0.09
Polystyrene sulfonic acid
Sodium salt solution
POM (Hostaform C9021))
10
80
10
0.13
PS (Polystyrene 168 N)
10
80
10
0.05
Purine 2 105
3,8
8.64
Curd 1 140 7
18
Curd cheese, „Fat curd cheese“
1.2
130 8
23
Silica sand
10-14
160
1.9
0.24
Raclette cheese
1.5
160
14.4
56.9
Canola seed
3-4
90
7.4
6.18
Rice (US parboiled)
3.5
105
12.5
10.98
Rye
4.5
150
11.5
10.72
Red wine
3-5
100
15-20
97.4
Sugar beet pulp pellets
4.5
150
8.6
11.77
Salt 2 100
3
4.9
Pretzel sticks
3-4
75
4.5
1.67
Sludge
11-12
130
90
80
Melted cheese
1.5
70
15
35.65
Chocolate
2.5
103
10
0.5
Chocolate powder
2-4
100
4
1.9
Chocolate water
2-3
90
10
6
Hogwash of kitchen waste
4-5
160
21
17.67
Lard
0.70
160
3.5
1.2
Shampoo 2 100
14.1
75.89
Soap 3 120
6
7.86
Mustard
2.5-3
80
19
34.69
Sesame seed
3
130
8
5.48
Soya bean flour
4.6
95
4.9
4.8
Soya beans. granulate
5
110
22.6
12.16
Bruised sunflower seed
3-3.5
100
4
5.92
Sunflower oil
10-14
138
2
0.1
Spaghetti 3 105
15.1
10.63
Rinsing agent
2
80
13.7
59.64
Dust
5-10
104
8-15
7.3
Starch derivative
2.5
150
12.3
30.29
Starch glue
1.5
100
8.9
17.96
Spread cheese
2.5-2.8
160
4.5
36.81
Soup
(instant product)
Material
Weight
Sample
(g)
2-2,5 120 8,7 19.01
Drying
temperature
( °C)
period
(approx.)
Moisture
%
(approx.)
body
%
74 DLT_N-BA-e-1421
2-3 80 4.5-7 3
Material
Drying
(min)
Solid
(approx.)
Tobacco
1.5
100
16
10.18
Tea. black
2
105 4 7.67
Pasta
1.5
120
8
10.64
Textile fibre
0.8-1.2
85
3.6
14.03
Theophylline
1.5
130
1.9
7.33
Thermoplastic PUR –
granulate
Walnut
2.8
100
5.6
3.5
Washing powder
2
160
12
7.32
Wheat spring water
2-3
90
10 6
Sausage casing
0.2
150
3.5
78.56
Toothpaste
2
100
7.7
34.28
Pulp
2.5
130
4.5
7.32
Cement
8-12
138
4-5
0.8
Sugar
4-5
138
10
11.9
Sugar beets
2
130
13.4
30.94
Weight
Sample
(g)
15-18 80 18 0.08
Drying
temperature
( °C)
period
(approx.)
Moisture
%
(approx.)
body
%
You will find further examples taken from actual use in our application manual,
available from the KERN home page (www.kern-sohn.com).
DLT_N-BA-e-1421 75
+
+
Do not apply cleaning agents containing solvents or abrasive
16 Servicing, maintenance, disposal
16.1 Cleaning
Before any maintenance, cleaning and repair work disconnect
1. Display
2. Wind
protection ring
3. Sample dish
4. Housing Please do not use aggressive cleaning agents (solvents or
the instrument from the operating voltage.
Only carry out cleaning tasks when the instrument has cooled down.
ingredients.
Remove wind protection ring / sample dish, wet clean and dry
thoroughly before fitti n g
similar agents), but a cloth dampened with mild soap suds.
Take care that the instrument is not penetrated by fluids and
polish it with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a
brush or manual vacuum cleaner.
Remove any spilt sample material immediately.
16.2 Servicing, maintenance
+ The instrument may only be opened by trained service technicians w ho
are authorized by KERN.
+ Ensure that the integrated balance is regularly calibrated, see chap.
Monitoring of test resources.
16.3 Disposal
+ Disposal of packaging and instrument must be carried out by operator
according to valid national or regional law of the location where the
instrument is used.
76 DLT_N-BA-e-1421
17 Ins t ant hel p
constantly / the stability display
different location/switch off interfering instrument
Fault Possible cause
Display is not lit up.
The display does not change
when a sample is being loaded
The weight display changes
does not appear.
Incorrect measuring re sul t
• The instrument is not switched on.
• The rechargeable battery is empty.
• Sample dish / dish holder is fitted incorrectly.
• Sample dish has contact with wind protection
device or heated cover.
• Draught/air movement
• Table/floor vibrations
• Electromagnetic fields / static charging (choose
if possible)
• Check adjustment
• No resetting to zero before loading the sample
Measurement is taking too
long
Measurement is
not reproducible
• Incorrect setting shutoff criterion
• Sample is not homogenous
• Drying time is too short
• Drying temperature too high (e.g. oxidation
sample material, boiling point of sample
exceeded)
• Temperature sensor soiled or defective
DLT_N-BA-e-1421 77
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