KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instruct ions
Electronic Moisture Analyzer
KERN DLB_A
Version 1.0
04/2011
GB
DLB_A-BA-e-1110
2 DLB_A-BA-e-1110
GB
KERN DLB_A
Version 1.0 04/2011
Operating instructions
Electronic Moisture Analyser
Contents
1 Technical data .................................................................................................... 4
2 Appliance overview ............................................................................................ 6
2.1 Keyboard and display overview ................................................................................................... 9
3 B as ic Information (General) ............................................................................ 10
3.1 Proper use .................................................................................................................................... 10
3.2 Improper Use ................................................................................................................................ 10
3.3 Warranty ....................................................................................................................................... 10
3.4 Monitoring of Test Resources .................................................................................................... 10
3.5 Danger Information ...................................................................................................................... 11
4 B asic S afety Precautions ................................................................................ 12
4.1 Pay attention to the ins tructions in the Operation Manual ..................................................... 12
4.2 Personnel training ....................................................................................................................... 12
5 Transport and storage ..................................................................................... 12
5.1 Testing upon acceptance ........................................................................................................... 12
5.2 Packaging / return transport ....................................................................................................... 12
6 Unpacking, S etup and C ommis s ioning.......................................................... 12
6.1 Installation Site, Location of Use ............................................................................................... 12
6.2 Unpacking and erection .............................................................................................................. 14
6.2.1 Scope of delivery ........................................................................................................................... 15
6.3 Mains connection ........................................................................................................................ 15
6.4 Connection of peripheral d evices .............................................................................................. 16
6.5 Initial Commissioning ................................................................................................................. 16
7 Weighing ........................................................................................................... 17
8 Adjus tment ....................................................................................................... 18
8.1 Adjust balance ............................................................................................................................. 18
8.2 Calibrate / adjust tem p erature .................................................................................................... 19
8.2.1 Calibrate temperature .................................................................................................................... 21
8.2.2 Adjust temperature ........................................................................................................................ 22
9 Appliance configuration .................................................................................. 23
9.1 Baud rate ...................................................................................................................................... 25
9.2 Auto Zero ...................................................................................................................................... 26
9.3 Filter .............................................................................................................................................. 28
9.4 Standstill control display ............................................................................................................ 29
9.5 Display backgr o u n d illumination ............................................................................................... 30
DLB_A-BA-e-1110 3
10 Operator menu – moisture analysis ................................................................ 31
10.1 How to implement drying .............................................................................................................32
10.1.1 Moisture analysis with drying program PrG1 – PrG5 .................................................................33
10.1.2 Moisture analysis with drying program PrG time ........................................................................37
10.1.3 Moisture analysis with drying program PrG Auto Mode .............................................................40
10.2 Save the drying programs PrG1, PrG2, PrG3, PrG4, PrG5 .......................................................44
11 R S 232C interface ............................................................................................. 46
11.1 Technical data ...............................................................................................................................46
11.2 Pin allocation of the output plug ................................................................................................46
11.3 Menu settings „Serial“ .................................................................................................................47
11.3.1 Printout examples (YKB-01N) ....................................................................................................48
12 General information concerning mois ture analysis ...................................... 49
12.1 Application ....................................................................................................................................49
12.2 Basics ............................................................................................................................................49
12.3 Adjustment to existing measuring method ................................................................................49
12.4 Preparing a sample.......................................................................................................................50
12.5 Sample material ............................................................................................................................51
12.6 Sample size / originally weighted in quantity ............................................................................51
12.7 Drying temperatur e.......................................................................................................................52
12.8 Recommendations / Guidelines ..................................................................................................52
13 E rror mess ages ................................................................................................. 56
14 S ervice, maintenance, dispos al ....................................................................... 57
14.1 Cleaning.........................................................................................................................................57
14.2 Service, maintenance ...................................................................................................................57
14.3 Disposal .........................................................................................................................................57
15 Ins tant help ........................................................................................................ 58
16 Declaration of conformity ................................................................................ 59
17 S hort ins truc tions for mois ture analys is ........................................................ 60
4 DLB_A-BA-e-1110
1 Technical data
Data DLB 160-3A
Radiator Halogen (1 x 400 W)
Temperature range
35°C - 160°C
Choice of steps at 1°C
Maximum load (Max) 160 g
Warm-up time 120 min
Minimum for drying 0.5 g
Readability (d)
Weighing mode 0.001g
Moisture analysis mode 0.01 %
Reproducibility
Weighing mode 0.001g
Moisture analysis mode
Weighed in quantity
10 g: 0.03 %
Linearity ± 0.003 g
Stabilization time (typical) 4 sec.
Recommended adjustment
weight, not added (class)
100g (E2)
Environmental conditions
• 5°C….+40°C ambient temperature
• 45% - 75% air humidity non-condensing
DLB_A-BA-e-1110 5
Shutoff criterion
1. Time mode
Drying is finished after the set time, adjustable 1 – 99
minutes.
2. Auto mode
Drying is completed, when the set weight value per
time unit is lower than the nominal value,
0.1 – 9.9 % loss of weight adjustable.
Sample dishes included Ø 100 mm
Result display [g] residual weight
[%] moisture
[%] dry mass:
ATRO [%] = Start weight : Residual weight x 100%
Internal memory 5 memory locations for drying programs
Interface RS232
Dimensions
Housing 210 x 340 x 225 mm
Available
drying room
Ø 100 mm, 20 mm high
Net weight
4.2 kg
Electric Supply
230V AC 50Hz
Mains adapter
9V AC, 1000mA
6 DLB_A-BA-e-1110
2 Appliance overview
Pos. Description
1 Foldable hood
2 Temperature sensor
3 Sample dish
4 Heating top
5 Balance
6 Display
7 Keyboard
8 Levelling screw
DLB_A-BA-e-1110 7
1. Plug-in connection cable „Balance / Heating top“
2. Connection net adapter „Balance“.
3. Current supply „Heating top“.
4. RS 232 interface
5. Plug-in connection cable „Balance / Heating top“
6. Main switch „Heating top“
7. Adjustable foot screws
3
6
4
5 2 7
1
8 DLB_A-BA-e-1110
8. Housing screws
9. Housing screws (for access remove the foot screws)
10. Adjustable foot screws
11. Rigid foot screw
9 8 11
10
DLB_A-BA-e-1110 9
2.1 Keyboard and display overview
Display Description
Zero indicator
]
Stability display
%
Display of percentage
Status „Weighted in quantity sample“
H
Drying process active
g
Gram display
Key Description Description
MENU button/
Short key pressing
Long time pressed button
until the acoustic signal
gets mute
• Invoke user menu
• Switch over display of
result
• Invoke / exit
configuration
menu
Navigation button
• Select menu items – scroll fo rward
STOP
ON/OFF button
• Complete drying
• Turn on/off
• Exit user menu
CAL button/
• Adjustment
Navigation button
• Select menu items – scroll backward
START
PRINT button
• Start drying
• Calculate weighing data via interface
Navigation button
• Confirm / store settings
TARE button
• Taring
• Zeroing
10 DLB_A-BA-e-1110
3 Basic Information (General)
3.1 Proper use
The device 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 device,
minus a possibly existing tare load, must be strictly avoided.
This could damage the instrument.
Never operate device in explosive environment. The serial version is not explosion
protected.
Changes to the unit's design are not permitted. This may lead to incorrect weighing
results, safety-related faults and destruction of the appliance.
The unit may only be operated in accordance with the described default settings. 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
• The appliance is modified or opened
• 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.
DLB_A-BA-e-1110 11
3.5 Danger Information
Individual parts of the case (e. g. the ventilation grids) may heat up considerably during
operation. For this reason, please touch the device only at the designated handles.
Sample materials developing aggressive vapours (e. g. acids) may cause corrosion
problems on some parts of the device. The moisture meters should mainly be used for
drying aqueous substances. Explosion prone, flammable samples must not be
analysed using the moisture meter.
Do not open or touch drying chambers during the drying
process as the device develops very high temperatures. Even
after finishing the measurement the appliance remains hot.
• Careful when removing the sample. The sample itself, the
sample dish and the heating unit may be very hot.
• Do not use the moisture meter for analysing explosion prone,
easily flammable samples.
• Do not operate the humidity analyser in areas with hazard of
explosion
• 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.
• Do not place combustible materials on, under or next to the
device.
• Ensure that there is sufficient empty space around the device in
order to prevent heat accumulation (distance to device 20 cm,
above it 1m).
• Make sure that liquids do not get in contact with the interior of
the device or the connections at the rear of the device.
If you spill liquid on the device, disconnect it immediately.
Afterwards do not operate the appliance and have it checked
by a competent KERN stockist before any further use.
12 DLB_A-BA-e-1110
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
appliances.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the appliance
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 glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
6 Unpacking, Setup and Commissioning
6.1 Installation Site, Location of Use
The unit 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 appliance.
DLB_A-BA-e-1110 13
On the installation site observe the following:
1. Avoid extreme heat as well as temperature fluctuation
caused by installing next to a radiator or in the direct
sunlight;
2. Remove explosion prone, easily flammable material in the
immediate vicinity. Emerging vapours, sample dish and all
parts of the sample chamber are hot!
3. Place the device on a firm, level surface.
4. Major display deviations (incorrect weighing results) may
be experienced should electromagnetic fields (e.g. due to
mobile phones or radio equipment), static electricity
accumulations or instable power supply occur. Change
location or remove source of interference.
5. Avoid static charging of the material to be weighed,
weighing container and windshield
6. Avoid jarring during weighing.
7. Protect the appliance against high humidity, vapours and
dust,
8. Do not expose the device to extreme dampness for longer
periods of time. Non-permitted condensation
(condensation of air humidity on the appliance) may occur
if a cold appliance is taken to a considerably warmer
environment. In this case, acclimatize the disconnected
appliance for ca. 2 hours at room temperature.
9. Protect the device against direct draughts due to open
windows and doors.
14 DLB_A-BA-e-1110
6.2 Unpacking and erection
Take the appliance carefully out of its packaging, remove the plastic jacket and
install it at the designated work space.
The appliance is supplied part-assembled. Immediately after unpacking check if the
delivered items are complete. Assemble the separate component parts according to
their sequence.
1.
2.
3.
4.
1. Put cover into the weighing chamber.
2. Put on the dish retainer carefully.
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.
5. Level the appliance with the help of the foot screws until it is standing evenly.
DLB_A-BA-e-1110 15
6.2.1 Scope of de livery
Serial accessories:
• Moisture analyzer, see chap. 2
• 10 sample dishes
• Power cable
• Mains adapter
• Connection cable „Balance / Heating top“
• Operating instructions
6.3 Mains connection
1. Power is supplied to the 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.
After connection to the power supply the balance will carry out a self-test. The
balance changes into stand-by mode.
To switch on press the ON/OFF button. As soon as the weight display appears,
the balance is ready for weighing.
2
1
16 DLB_A-BA-e-1110
3
2. Power supply to the heating top is provided via the supplied mains cable. Do not
connect the appliance to the power grid unless the information on the appliance
(sticker) matches the local mains voltage.
To switch on, press the main switch on the rear side of the appliance.
3. Attach the connection cable balance / heating top.
The appliance 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.
6.4 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 devices by KERN, as they are ideally tuned to the
appliance.
6.5 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. During this warming up
time the balance must be connected to the power supply (mains, accumulator or
battery).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
DLB_A-BA-e-1110 17
7 Weighing
Start-up
1. In stand-by mode (see chap. 6.3) press ON/OFF button.
As soon as the weight display appears, the balance is
ready for weighing.
Switching Off
2. Press the ON/OFF button, the balance returns into standby mode.
Simple weighing
3. Place goods to be weighed on balance.
4. Wait until the stability display appears []
5. Read weighing result.
Taring
6. Place the weighing box and press the TARE button.
„0-t“ is displayed.
7. After standstill control the zero display appears.
The weight of the container is now internally saved.
8. Weigh the material, the net weight will be indicated.
After removing the weighing container, the weight of the
weighing container appears as negative display.
The tare weight is saved until it is deleted. Remove the load
from the balance and press the TARE button. „0-t“ is
displayed, wait until the zero display appears.
The tare procedure can be repeated as many times as
necessary, for example with initial weighing of several
components for a mix (add-on weighing). The limit is
reached when the total weighing range capacity is full.
18 DLB_A-BA-e-1110
8 Adjustment
8.1 Adjust balance
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.
• Weight value of the required adjustment weight see chpt. 1 “Technical
specifications“:
In weighing mode press the CAL button.
Wait until the weighed value for the required adjustment weight appears
flashing.
Example 100 g
During the flashing display put the required adjustment weight carefully in the
centre of the sample dish. The flashing display disappears.
After successful adjustment the balance automatically returns to weighing mode.
Take away adjustment weight
In case of an adjustment error (e.g. objects on the weighing plate) the display will
show an error message, repeat adjustment.
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