KERN & SOHN DBS 60-3 User Manual
KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operating instructions
Electronic Moisture Analyser
KERN DBS
Version 1.1
03/2013
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
DBS-BA-e-1311
KERN DBS
Electronic Moisture Analyser
GB
Version 1.1 03/2013
Operating instructions
Contents
1 Technical data ................................................................................................ 4
2 Appliance overview ....................................................................................... 6
2.1 Overview of display .................................................................................................................. 8
2.1.1 Display examples .................................................................................................................................... 12
2.2 Keyboard overview ................................................................................................................. 13
3 Basic Information (General) ........................................................................ 15
3.1 Proper use ............................................................................................................................... 15
3.2 Improper Use........................................................................................................................... 15
3.3 Warranty .................................................................................................................................. 15
3.4 Monitoring of Test Resources ............................................................................................... 15
3.5 Danger Information ................................................................................................................ 16
3.5.1 “Hazard information” sticker .................................................................................................................... 20
4 Transport and storage ................................................................................. 21
4.1 Testing upon acceptance ...................................................................................................... 21
4.2 Packaging / retur n transport ................................................................................................. 21
5 Unpacking, Setup and Commissioning ..................................................... 21
5.1 Installation Site, Lo cation of Use .......................................................................................... 21
5.2 Unpacking and checking ....................................................................................................... 24
5.2.1 Scope of delivery / serial accessories ..................................................................................................... 24
5.3 Placing ..................................................................................................................................... 25
5.4 Mains connection ................................................................................................................... 28
5.4.1 Turning On the Power ............................................................................................................................. 29
5.5 Commissioning ....................................................................................................................... 30
5.6 Connection of periphera l devices ......................................................................................... 30
6 Adjustment ................................................................................................... 31
6.1 Adjust balance ........................................................................................................................ 31
6.2 Adjust temperature ................................................................................................................. 33
6.3 ISO/GLP log ............................................................................................................................. 36
7 Menu ............................................................................................................. 37
7.1 Navigation in the menu .......................................................................................................... 38
7.1.1 Numeric entry .......................................................................................................................................... 39
8 Moisture analysis ......................................................................................... 40
8.1 Start drying .............................................................................................................................. 40
8.2 Abort drying ............................................................................................................................ 42
8.3 Finish drying ........................................................................................................................... 42
8.4 Turn off appliance .................................................................................................................. 42
9 Drying parameters ....................................................................................... 43
2 DBS-BA-e-1311
9.1 Save / access .......................................................................................................................... 44
9.2 Adjust ....................................................................................................................................... 45
9.2.1 Drying modes .......................................................................................................................................... 45
9.2.1.1 Drying mode AUTO (Standard drying/switch-off criterion “∆M“) ...................... 45
9.2.1.2 Drying mode TIME (Standard drying/switch-off criterion “Time“) ..................... 46
9.2.1.3 RAPID Drying mode (Rapid drying) .............................................. 47
9.2.1.4 SLOW Drying mode (Slow drying) ............................................... 49
9.2.1.5 STEP Drying mode (Step drying) ................................................ 51
9.2.2 Result display .......................................................................................................................................... 54
9.2.3 Start criterion ........................................................................................................................................... 56
10 Miscellaneous settings ............................................................................... 57
10.1 Enter sample desi g n ation ...................................................................................................... 57
10.2 Set date/time for mea suring protocol ................................................................................... 58
10.3 Menu Lock ............................................................................................................................... 59
10.4 Change password ................................................................................................................... 61
10.5 Enter identification nu mber ................................................................................................... 62
10.6 Resetting the menu ................................................................................................................ 63
11 Print, store and call-up measurement results ........................................... 64
11.1 Pin allocation RS232C interface ............................................................................................ 65
11.2 Interface parameters .............................................................................................................. 66
11.3 Output interval ........................................................................................................................ 68
11.4 Call up and print out measu ring results............................................................................... 69
11.5 Print out currently preset drying parameters ...................................................................... 70
11.6 Delete measuring results from memory ............................................................................... 71
11.7 Printout examples .................................................................................................................. 72
12 General inform ation concerning moisture analysis ................................. 75
12.1 Application .............................................................................................................................. 75
12.2 Basics ...................................................................................................................................... 75
12.3 Adjustment to existing measuring method .......................................................................... 75
12.4 Preparing a sample................................................................................................................. 76
12.5 Sample material ...................................................................................................................... 77
12.6 Sample size / origi n ally weighted in quantity ...................................................................... 77
12.7 Drying temperature................................................................................................................. 78
12.8 Recommendations / Guidelines ............................................................................................ 78
13 Service, maintenance, disposal .................................................................. 83
13.1 Cleaning................................................................................................................................... 83
13.2 Service, maintenance ............................................................................................................. 84
13.2.1 Remove protective glass guard .......................................................................................................... 84
13.2.2 Lamp change...................................................................................................................................... 86
13.2.3 Replacing fuses .................................................................................................................................. 87
13.3 Disposal ................................................................................................................................... 87
14 Instant help ................................................................................................... 88
14.1 Error messages ....................................................................................................................... 89
15 Declaration of c onform ity ........................................................................... 91
DBS-BA-e-1311 3
1 Technical data
Slow drying (SLOW)
• 5°C….+40°C ambient temperature
• max 85% air humidity non-condensing
Data DBS 60-3
Radiator Halogen (1 x 400 W)
Temperature range
Maximum load (Max) 60 g
Minimum weight (min) 0.02 g
Warm-up time 2 h
Weighing mode 0.001g
Readability (d)
Moisture analysis mode 0.01 %
Reproducibility
„Weighing mode“
Initial weight 2 g: 0.15 %
Reproducibility
„Weighing mode“
Initial weight 5g 0.05 %
Initial weight 10 g 0.02 %
Standard drying (AUTO / TIME))
1°C increments selectable
50°C - 200°C
0.001 g
Drying modes
Linearity ± 0.003 g
Stabilization time (typical) 3 sec.
Recommended adjustment
weight, not added (class)
Environmental conditions
Step drying (STEP)
Rapid drying (RAPID)
50g (F1)
4 DBS-BA-e-1311
Housing 202 x 336 x 157 mm
Available drying room
Ø 95 mm, 20 mm high
Net weight
4.2 kg
Electric Supply
220 – 240 V AC 50/60 Hz
Power consumption
Rating 430 VA
Voltage fluctuations
Within ±10 %
Power line fuse
3.15 A, 250V
Interrupting rating of fuse
35 A
Switch-off criterion
Sample dishes included Ø 95 mm
Weigh ing Units
• AUTO
The drying is finished when the preset weight loss
(∆M ) remains constant for 30 seconds.
• TIME
The drying is finished after the preset time, 1 minute
– 4 hours (1 minute increments)
or 12 hours can be selected
• Manual (STOP button)
[M/W]
[D/W]
[M/D]
[W/D] ATRO* moisture
[GRAM] Gram display
[%] moisture
[%] dry mass:
ATRO* dry mass
Internal memory
Interface RS232
Dimensions (B x D x H)
Pollution Degree 2
Overvoltage Category Category II
Altitude Up to 2000 m
Method memory 10 memory locations for drying
programs, see chap. 9.1
Sample memory 100 memory locations for measuring
results, see chap. 11
Installation Site device may only be used indoors
DBS-BA-e-1311 5
2 Appliance overview
Front view:
Pos. Description
1 Viewing panel
2 Sample dish
3 Display
4 Bubble level
5 Keyboard
6 Adjustable foot
7 Heated cover
8 Halogen lamp
9 Temperature sensor
6 DBS-BA-e-1311
Rear view:
Pos. Description
10 Anti-theft protection device connection
11 Not documented
12 RS232
13 USB, not documented
14 Mains connection socket
15 Fuse box
DBS-BA-e-1311 7
2.1 Overvie w of display
No. Display Description
1
2
3
4
5
Drying mode
AUTO
+ see chap. 9.2.1.1
TIME
+ see chap. 9.2.1.2
Currently loaded drying program, see chap. 9.1
Illuminates during communication with external devices.
• The stability display indicates that the weighing value is
stable.
• Highlights current setting in the menu.
The indicator will mark the measuring result
Status display during drying
Heating-up period
Preset drying temperature is
reached. The drying is finished
when ∆M constant.
Heating-up period
Preset drying temperature is
reached. The drying is finished
when the preset drying time has
expired.
8 DBS-BA-e-1311
RAPID
+ see chap. 9.2.1.3
SLOW
Heating-up period “pre-heating
step”
The pre-heating step is switched
on until “∆M pre-heating step” is
constant.
Temperature is lowered to the
preset drying temperature.
Preset drying temperature is
reached.
The drying is finished when the
preset completion criterion is
fulfilled.
Heating-up period
+ see chap. 9.2.1.4
STEP
+ see chap. 9.2.1.5
Preset drying temperature is
reached.
The drying is finished when the
preset completion criterion is
fulfilled.
Heating-up period step 1
Drying step 1
Heating-up period step 2
Drying step 2
Heating-up period step 3
Drying step 3
DBS-BA-e-1311 9
6
Previous drying time
7
8
9
Basic displays
Current temperature
Result display, see chap. 9.2.2
%
M/W [%] moisture
D/W
M/D
W/D
g
Gram
Weight display
Display % moisture
[%] dry mass:
ATRO dry mass
ATRO moisture
Gram display
0
Current menu selection
UNIT
COMSET
CODE
CAL
PRINT
Menu access via MENU button
Equipment is in Ready mode, see chap. 8.4.
Equipment is in menu „Display of results“, see chap. 9.2.2
Equipment is in menu „Interface parameters“, see chap. 11.2
Equipment is in menu „Sample denomination“, see chap. 10.1
Equipment is in menu „Adjustment“, see chap. 6
Equipment is in menu „Printer“, see chap. 11.3 – 11.5
10 DBS-BA-e-1311
a
Status display „Equipment“
Top
Centre
Bottom
Is displayed when the heated cover
is open.
Flashes when the heated cover
needs to be closed.
Goes out when heated cover is
closed
Is displayed when the heated cover
is open.
Goes out when heated cover is
closed
Flashes when drying process is
active
Indicates that a sample is in the
sample dish.
Flashes when a sample needs to be
loaded.
Goes out if there is no sample in
the sample dish.
Indicates that a sample is in the
sample dish.
Flashes if taring is required.
Goes out if no sample dish is in
place.
Indicates upon switch-on that the
dish holder is installed.
Flashes upon switch-on if the dish
holder is not installed.
DBS-BA-e-1311 11
2.1.1 Display examples
During drying:
After drying:
1
Loaded drying program + see chap 9.1
2
Previous time
3
Current temperature
4
Unit „Display of results“ + see chap. 9.2.2
5
Preset drying mode /
Status display drying
6
Current moisture content in %.
During drying with can be switched in ∆M (see chap. 9.2.1.1).
7
Drying process active + see chap. 2.1
8
Measuring result indicator
9
Measuring value (unit in the preset result display) + see chap. 9.2.2
+ see chap. 9.2.1
+ see chap. 2.1
12 DBS-BA-e-1311
2.2 Keyboard overview
Turn on/off
• Call up menu
• Selecting a menu item to the left.
• Scroll back
• Scroll to next page
• Selection of a menu item in clockwise direction
• Taring
• Zeroing
• Activate menu item
• Save setting
DBS-BA-e-1311 13
• Exit menu
• Back to moisture analysis mode
• Quit
Start drying
Complete drying
Numerical input, see chap. 7.1.1
14 DBS-BA-e-1311
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.
Balance may be damage by this.
Never operate device 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-related faults and destruction of the moisture analyser.
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
• 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 Re sources
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.
DBS-BA-e-1311 15
3.5 Danger I nform ation
!
!
!
!
!
!
!
WARNING
The moisture analyser 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 equipment or other material
damage.
The moisture analyser should be used mainly for the drying of aqueous
substances.
The moisture analyser may not be used in a hazardous area.
The appliance may only be operated and maintained by trained personnel.
Carefully read this operation manual before setup and commissioning, even if
you are already familiar with KERN appliances.
This moisture analyser is a robust precision instrument, however, it must be
handled with care to ensure many years of trouble-free operation.
Never make any modifications or design changes to the equipment
whatsoever. Always use original spare parts and accessories.
16 DBS-BA-e-1311
!
!
!
Make sure that liquids do not get in contact with the interior of the device, the
connections at the rear of the device and the peripherals (connected PC or
printer).
If you spill liquid on the device, disconnect it immediately.
Afterwards do not operate the moisture analyzer and have it checked by a
competent KERN stockist before any further use.
Never store materials on the equipment.
Never place combustible materials on, under or next to the equipment, as the
environment of the instrument heats up to a high temperature.
DBS-BA-e-1311 17
!
!
!
!
!
!
!
!
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 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 device.
Careful when removing the sample. The sample itself, the sample dish and
the heating unit may be very hot.
Maintain sufficient space in the environment of the equipment to prevent heat
build-up (distance from the equipment 20cm, upwards 1m).
Do not operate the humidity analyser in areas with hazard of explosion
Do not place anythin which may interfere the unplugging
The power plug must be easily accessible
18 DBS-BA-e-1311
!
!
!
!
Hazards during and after measuri ng
Ensure correct installation of all components, see chap. 5.3
Careful when removing the sample. The sample itself, the sample dish 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. Therefore, only take hold of the equipment by
the marked handles.
DBS-BA-e-1311 19
3.5.1 “Hazard information” sticker
!
!
!
!
Ventilation grilles and inspection windows may become very hot during
operation
Always open heated cover completely.
Do not use any combustible sample materials.
Disconnect the equipment from the power supply prior to changing a lamp,
see chap. 13.2.2.
20 DBS-BA-e-1311
4 Transport and stora ge
4.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
4.2 Pac kaging / 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.
5 Unpacking, Setup and Commissioning
5.1 Instal lation 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.
DBS-BA-e-1311 21
On the installation site observe the following:
!
!
!
!
!
Remove explosive materials from the immediate vicinity.
Emerging vapours, sample dish and all parts of the sample chamber are hot!
Remove easily flammable materials from the immediate vicinity.
Protect the device against direct draughts due to open windows and doors.
Avoid extreme heat and temperature fluctuations e.g. due to installation next
to radiators.
Avoid direct sunlight
22 DBS-BA-e-1311
!
!
!
!
!
!
!
!
Never store materials on the equipment.
Protect the appliance 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 equipment),
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 device on a firm, level surface.
Avoid jarring during weighing.
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.
Operate the device only indoors.
DBS-BA-e-1311 23
5.2 Unpack ing and checking
Open package, take out the appliance and accessories. Verify that there has been
no damage and that all packing items are present.
5.2.1 Scope of delivery / serial accessories
1. Instrument
2. 50 disposable sample dishes
3. Dish holder
4. Wind protection ring
5. Heat shield
6. Spare fuse
7. Removal aid
8. Power cable
9. Protective cover
10. Operating instructions
11. Menu overview
12. Hexagonal socket wrench
24 DBS-BA-e-1311
5.3 Placing
The moisture analyser is delivered in pieces. Check immediately after unpacking all the
parts that the delivery is complete and assemble the individual components as described
below.
1. Fit heat shield.
2. Install wind protection ring, ensuring correct positioning, on .
DBS-BA-e-1311 25
3. Install dish holder, ensuring correct positioning, on .
4. Fit sample dish.
5. Level the equipment with foot screws [1] until the air bubble of the water balance is
in the prescribed circle.
26 DBS-BA-e-1311
If both foot screws are turned simultaneously in clockwise direction, the air bubble will
Fig. 1
Fig. 3
Fig. 2
If the air bubble is at the lefthand edge, level the equipment with the righthand foot
screw, see Fig.1.
If the air bubble is at the righthand edge, level the equipment with the lefthand foot
screw, see Fig.2.
Fig. 4
move forwards (see Fig.3).
If both foot screws are turned simultaneously in anticlockwise direction, the air bubble will
move backwards (see Fig.4).
Check levelling regularly.
DBS-BA-e-1311 27
5.4 Mains connection
Power supply is provided via the supplied mains cable.
Check, whether the voltage acceptance on the scales is set correctly. Do not connect
the appliance to the power grid unless the information on the appliance (sticker)
matches the local mains voltage.
Important:
Does the labelling match the local mains voltage?
- Do not connect if mains voltages are different!
- If matching, connect the scales.
The moisture analyzer 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.
- The power plug must be always accessible.
- Before operating, check all cables for damage.
- Guide the cables so that they cannot become damaged or interfere with the
measuring process.
28 DBS-BA-e-1311
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