KERN DLB-A User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating manual
Electronic Moisture Analyzer
KERN DLB-A
Type TDLG_A
Version 1.1
2020-12
GB
TDLG_A-BA-e-2011

2 TDLG_A-BA-e-2011
GB
KERN DLB-A
Version 1.12020-12
Operating manual
Electronic Moisture Analyzer
Contents
1TECHNICAL DATA............................................................................................. 4
2DECLARATION OF CONFORMITY ................................................................... 5
3APPLIANCE OVERVIEW ................................................................................... 6
3.1 Components ......................................................................................................................... 6
3.2 Keyboard and display overview ......................................................................................... 8
4BASIC INFORMATION (GENERAL)................................................................ 10
4.1 Proper use........................................................................................................................... 10
4.2 Improper Use...................................................................................................................... 10
4.3 Warranty.............................................................................................................................. 10
4.4 Monitoring of Test Resources .......................................................................................... 10
5BASIC SAFETY PRECAUTIONS..................................................................... 11
5.1 Pay attention to the instructions in the Operation Manual............................................ 11
5.2 Personnel training.............................................................................................................. 11
5.3 Danger Information............................................................................................................ 11
6TRANSPORT AND STORAGE......................................................................... 13
6.1 Check upon acceptance.................................................................................................... 13
6.2 Packaging / return transport............................................................................................. 13
7UNPACKING, SETUP AND COMMISSIONING ............................................... 14
7.1 Installation Site, Location of Use ..................................................................................... 14
7.2 Unpacking and checking................................................................................................... 15
7.2.1 Scope of delivery / serial accessories:................................................................................. 15
7.3 Placing................................................................................................................................. 16
7.4 Mains connection............................................................................................................... 17
7.5 Switching on/off................................................................................................................. 18
7.5.1 Selecting user language....................................................................................................... 18
7.5.2 Initial Commissioning........................................................................................................... 18
7.6 Connection of peripheral devices .................................................................................... 18
8ADJUSTMENT.................................................................................................. 19
8.1 Weight adjustment............................................................................................................. 19
8.2 Calibrate/adjust the temperature of the heating module............................................... 21
8.2.1 Calibration of temperature value.......................................................................................... 22
8.2.2 Adjust temperature............................................................................................................... 23
8.3 View / print out adjustment logs....................................................................................... 25

TDLG_A-BA-e-2011 3
9SETUP MENU................................................................................................... 26
9.1 Navigation in the menu...................................................................................................... 26
9.2 Description of individual functions.................................................................................. 27
9.2.1 User language...................................................................................................................... 27
9.2.2 Setting time and date ........................................................................................................... 28
9.2.3 Switch on and off the background illumination .................................................................... 28
9.2.4 Setting the contrast of the display........................................................................................ 29
9.2.5 Weighing unit [g / mg] .......................................................................................................... 29
9.2.6 Auto zero.............................................................................................................................. 30
9.2.7 Setting the filter .................................................................................................................... 31
9.2.8 Setting the stability............................................................................................................... 32
10 APPLICATION MENU <MOISTURE ANALYSIS>........................................ 33
10.1 Settings of the heating module......................................................................................... 34
10.1.1 Setting the heating profile................................................................................................ 35
10.1.2 Connect the preheating stage.......................................................................................... 36
10.1.3 Start mode ....................................................................................................................... 37
10.1.4 Start delay........................................................................................................................ 38
10.1.5 Stability test...................................................................................................................... 38
10.2 GLP settings....................................................................................................................... 39
11 MOISTURE ANALYSIS................................................................................. 40
11.1 Define the drying method.................................................................................................. 40
11.1.1 Setting the drying temperature ........................................................................................ 40
11.1.2 Adjust the switch-off criterion........................................................................................... 41
11.2 Carrying Out Measurement............................................................................................... 42
11.3 Sample logs (KERN YKB-01N).......................................................................................... 44
11.4 Results display................................................................................................................... 46
12 RS 232 INTERFACE ..................................................................................... 47
12.1 Technical data .................................................................................................................... 47
12.2 Adjusting the interface parameters.................................................................................. 47
12.2.1 Setting the output interval................................................................................................ 48
12.2.2 Select printer type............................................................................................................ 49
12.2.3 Setting the baud rate ....................................................................................................... 49
12.2.4 Turn on/off GLP function.................................................................................................. 50
13 GENERAL INFORMATION CONCERNING MOISTURE ANALYSIS........... 51
13.1 Application.......................................................................................................................... 51
13.2 Basics.................................................................................................................................. 51
13.3 Drying process................................................................................................................... 51
13.4 Comparison with a reference procedure......................................................................... 52
13.5 Handling samples .............................................................................................................. 52
14 SERVICING, MAINTENANCE, DISPOSAL .................................................. 56
14.1 14.1 Cleaning...................................................................................................................... 56
14.2 Servicing, maintenance..................................................................................................... 56
14.3 Disposal .............................................................................................................................. 56
15 INSTANT HELP............................................................................................. 57

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1 Technical data
Data DLB 160-3A DLB 160-3A110V
Item no./ Type TDLG 160-3-A TDLG 160-3-A110V
Radiator Halogen (1 x 400 W)
Temperature range 35°C - 160°C
Choice of steps at 1°C
Maximum load (Max) 160 g
Readability (d) 0.001 g (weighing mode)
0.01% (moisture content)
Reproductibility (weighing mode) 0.001 g
Reproductibility
moisture content
(depending on application)
Initial weight 2 g 0.15 %
Initial weight 10 g 0.05 %
Linearity ± 0.003 g
Stabilization time (typical) 4 sec.
Smallest sample size 0.05 g
Recommended adjustment weight,
not added (class) 100g (E2)
Warm-up time 30 min
Environmental conditions 5°C….+35°C ambient temperature
45% - 70% air humidity non-condensing
Heating profiles Standard drying
Quick drying

TDLG_A-BA-e-2011 5
Shutoff criterion •Automatic, selectable 1mg/30s – 10 mg/30s
•Time-controlled, selectable 1 min – 99 min
•Manual switch-off by push-button
Sample trays Ø 95 mm
Result displays [%] Moisture content
[%] Dry material content
[g] Residual weight in grams
ATRO
Interface RS232
Dimensions (W x D x H) Housing 215 x 345 x 235 mm
Available
drying room Ø 92 mm, 25 mm high
Net weight 4.7 kg
Electric Supply 220 – 240 V AC 50/60 Hz 100 - 120 V AC 50/60 Hz
Languages operator guide German, English, French,
Italian, Spanish, Portuguese
2 Declaration of conformity
The current EC/EU Conformity declaration can be found online in:
www.kern-sohn.com/ce

6 TDLG_A-BA-e-2011
3 Appliance overview
3.1 Components
Pos.
Designation
1 Heater module
2 Opening handle
3
Protective glass guard
4
Temperature sensor
5 Halogen lamp
6 Sample tray
7 Windshield
8
Removal aid
9 Display
10 Keyboard
11 Levelling screw

TDLG_A-BA-e-2011 7
Rear view:
Pos.
Designation
12 Connection of connecting cable „Heating module /
Scales
13
14 Serial Interface RS 232C
15 Mains connection socket
16 Bubble level

8 TDLG_A-BA-e-2011
3.2 Keyboard and display overview
Status bar:
Pos. Designation
[1] Set drying temperature
[2] Active heating profile
[3]
Current date
[4] Current time
[5]
Active switch off criterion
Toolbar:
The displayed icons in the toolbar depend on the process being executed at this
moment.
By pressing the respective functions key (F1 – F6) below the icon, either the function
is executed or the settings are taken over.
Toolbar „Start display“
Pos. Designation
[1] Call up menu
[2] Start measurement
[3]
Select drying temperature
[4] Select switch off criterion
[5]
Set to zero/taring
[6] Turn on/off
Toolbar
Status bar

TDLG_A-BA-e-2011 9
Toolbar during measurement
Pos.
Designation
[7] Interrupt the drying process
[8] Stopping the drying process
[9]
Display the current drying parameters
[10]
Switch over the unit of the results display
(% moisture %dry content %Atroresid.weight [g]
Toolbar „Display of results“
Pos.
Designation
[11]
Exit the drying program / back to start display
[12]
Print out the measurement log
[13] (de)activate, edit GLP parameters
[14] Display of start- and residual weight including date and
time
[15]
Switch over the unit of the results display, see chap. 11.4
(% moisture

%dry content

%Atro

resid.weight [g]

10 TDLG_A-BA-e-2011
4 Basic Information (General)
4.1 Proper use
The device purchased by you is designed for a fast and reliable determination of
material moisture in liquid and solid materials by applying the method of
thermogravimetrics.
4.2 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 cause damage to the integrated balance.
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.
4.3 Warranty
Loss of warranty due to
•Our conditions in the operation manual are ignored
•The appliance is used outside the described uses
•The instrument 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
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
integrated balance 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.

TDLG_A-BA-e-2011 11
5 Basic Safety Precautions
5.1 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.
5.2 Personnel training
The instrument may only be operated and maintained by trained personnel.
5.3 Danger Information

The moisture analyzer is used to analyse the moisture content of
materials. 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 damage.

The moisture analyzer should be used mainly for the drying of
aqueous substances.

The moisture analyzer may not be used in a hazardous area.

The moisture analyzer may not be used in an explosive atmosphere.

The moisture analyzer may only be operated and maintained by
trained staff.

Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN
instruments.

Never make any modifications or design changes to the equipment
whatsoever. Always use original spare parts and accessories.

Ensure that no liquid gets into the appliance, in the connections on
the appliance’s backside and in connected peripherical devices (e.g.
printer, PC).
If you spill liquid on the device, disconnect it immediately.
Afterwards do not operate the moisture meter and have it checked
by a competent KERN stockist before any further use.

12 TDLG_A-BA-e-2011
Hazards during and after measuring

Ensure the correct installation of all components.

Careful when removing the sample. The sample itself, the sample
tray and the 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.
The moisture analyzer operates using heat!

Maintain sufficient space in the environment of the instrument to
prevent heat build-up (distance from the instrument 20cm, upwards
1m).

The heat extraction of the sample must never be covered, blocked,
taped up or altered in any other way.

Never place combustible materials on, under or next 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
tray and the heating unit may be very hot.
Fire or explosion

Explosive, easily flammable samples and samples that go into a
chemical reaction when subjected to heat, may not be analysed with
the moisture analyzer.

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.

TDLG_A-BA-e-2011 13
Substances that contain toxic or corrosive ingredients, that
produce toxic gases when drying, cause irritation (eyes, skin,
respiratory system), induce nausea or result in death

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.
Substances which casue corrosive gases when heated (ex. acids).

In this case work with a smaller sample quantity, because the
evaporated gases may condense on cooler body parts and cause
corrosion there.
6 Transport and storage
6.1 Check upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
6.2 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.
Secure all parts against shifting and damage.

14 TDLG_A-BA-e-2011
7 Unpacking, Setup and Commissioning
7.1 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 your moisture
analyzer.
On the installation site observe the following:

Remove explosion prone and easily flammable material in the
immediate vicinity.
Emerging vapours, sample tray 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 heat 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, should electromagnetic fields (e.g. due to mobile
phones or radio instruments), 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.

TDLG_A-BA-e-2011 15
7.2 Unpacking and checking
Take the moisture meter carefully out of its packaging, remove the plastic jacket and
install it at the designated work space.
7.2.1 Scope of delivery / serial accessories:
1
1. Moisture analyzer, see chap. 3.1Components
2. Power cable
3. Connecting cable „Balance / Heating module“
4. Dish holder
5. Removal aid
6. Windshield
7. Sample trays (10 pieces)

16 TDLG_A-BA-e-2011
7.3 Placing
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. Insert wind protection ring
2. Insert removal aid
3. Carefully insert the tray holder and
twist until it engages.
4. Fit sample tray.
5. Level the device with foot screws
until the air bubble of the water
balance is in the prescribed circle.
Check levelling regularly.
6. Connect the scale and the heating
top to the cable as shown on the
diagram.
Connect the mains cable to the mains
connecting bush of the device,
see chap. 7.4
7. Mains connection

TDLG_A-BA-e-2011 17
7.4 Mains connection
For connection only use the delivered 3-pole mains cable.
The appliance must be connected to a correctly installed standard
socket with earth terminal (PE).
Check, whether the voltage acceptance on the device is set correctly.
Do not connect the appliance to the power grid unless the information
on the appliance (sticker) matches the local mains voltage.
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.
Ensure access to mains plug at all times.
Before starting, check the mains cable for damage.
Place the cable in a way that it cannot be damaged or hinders the
measuring process.
Important:
Does the rating match the standard local mains current?
Do not connect if mains voltages are different!
If matching, the moisture analyzer may be connected.

18 TDLG_A-BA-e-2011
7.5 Switching on/off
Supply balance with power via the mains power cable. The display unit lights
up, the software version and the model name are shortly displayed. From that
point onwards the weighing scale will be in standby mode.
To turn on the display, press the F6-key.
As soon as the weight display appears, the instrument will be ready to weigh.
To switch off the appliance and to transit into standby-operation,
press the F6-key.
7.5.1 Selecting user language
The display is configured to German upon delivery. For setting additional languages
see chap. 9.2.1.
7.5.2 Initial Commissioning
In order to receive precise weighing results from electronic balances, the instrument
must have reached its operating temperature (see warming-up time chapter 1).
The integrated balance must be connected to the power supply during this warming
up period.
The accuracy of the integrated balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
7.6 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the moisture analyzer from the power supply.
Only use accessories and peripheral devices by KERN, as they are ideally tuned to
the appliance.

TDLG_A-BA-e-2011 19
8 Adjustment
8.1 Weight adjustment
The weight adjustment of the integrated balance is not necessary for a correct
moisture analysis as this measurement can only be made relatively. The instrument
measures the weight of the sample before and after the drying process and the
moisture content is determined by the relation between wet and dry weight.
The instrument however should be adjusted, if this is required by the quality system
which you apply.
Procedure:
•Observe stable environmental conditions.
A warm up time (see chapter 1)
is required for stabilization.
•
Carry out adjustment with placed sample tray. Ensure that no objects are
within the sample tray.
•
Carry out adjustment as near as possible to the balance’s maximum
weight (recommended adjustment weight see chap. 1). Info about test
weights can be found on the Internet at: http://www.kern-sohn.com.
1. In the start display press the F1-key, the main menu will appear.

20 TDLG_A-BA-e-2011
2. Use the buttons under to select the menu item
<5-Balance Calibration> and acknowledge by .
3. The weight value of the required adjustment weight will be displayed.
4. Acknowledge with .
5. During the flashing weight display put the required adjustment weight
carefully in the centre of the sample tray.
The flashing display disappears.
After successful adjustment the balance automatically returns to weighing
mode, „100.000 g“ is displayed. Take away adjustment weight.