KERN & SOHN MLB 50-3C User Manual

KERN & Sohn GmbH

Ziegelei 1	Phone: +49-[0]7433- 9933-0
D-72336 Balingen	Fax: +49-[0]7433-9933-149
E-Mail: [e-mail]	Internet: www.kern-sohn.com

Operating manual

Electronic Moisture Analyser

KERN MLB_C

Version 3.1

03/2014

GB

MLB_C-BA-e-1431

GB	KERN MLB_C
	Version 3.1 03/2014
	Operating manual
	Electronic Moisture Analyser

Contents

1		TECHNICAL DATA.............................................................................................		5
1.1			Dimensions ...............................................................................................................................	6
2		DEVICE OVERVIEW...........................................................................................		7
2.1			Keyboard overview...................................................................................................................	8
2.2			Display overview (during measurement) ...............................................................................	9
3		BASIC INFORMATION (GENERAL) ................................................................		10
3.1			Proper use...............................................................................................................................	10
3.2			Improper Use ..........................................................................................................................	10
3.3			Warranty ..................................................................................................................................	10
3.4			Monitoring of Test Resources...............................................................................................	10
4		BASIC SAFETY PRECAUTIONS .....................................................................		11
4.1			Pay attention to the instructions in the Operation Manual ................................................	11
4.2			Personnel training ..................................................................................................................	11
4.3			Danger Information ................................................................................................................	11
5		TRANSPORT AND STORAGE.........................................................................		13
5.1			Testing upon acceptance ......................................................................................................	13
5.2			Packaging / return transport .................................................................................................	13
6	UNPACKING, SETUP AND COMMISSIONING ...............................................			15
6.1			Installation Site, Location of Use..........................................................................................	15
6.2			Unpacking and assembly ......................................................................................................	16
	6.2.1		Scope of delivery .............................................................................................................	17
6.3			Mains connection ...................................................................................................................	17
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6.4	Switch on/switch off device ..................................................................................................	17
Stability display ...................................................................................................................................		17
Balance zero display ...........................................................................................................................		17
6.5	Connection of peripheral devices.........................................................................................	18
6.6	Initial Commissioning ............................................................................................................	18
7	WEIGH/TARE ...................................................................................................	19
8	MENU................................................................................................................	20
9	P1 CAL - ADJUSTMENT..................................................................................	22
9.1	P1-01 External adjustment ....................................................................................................	22
9.2	P1-02 Adjustment test............................................................................................................	23
9.3	P1-03 Temperature adjustment.............................................................................................	24
9.5	P1-04 Adjustment record print-out.......................................................................................	28
9.6	P1-05 temperature calibration...............................................................................................	29
10	P2 GLP (GOOD LABORATORY PRACTICE) ..............................................	31
11	P3 SETTING DATE/TIME..............................................................................	33
12	P4 BASIC SETTINGS ...................................................................................	34
13	P5 RS 232 INTERFACE ................................................................................	36
14	P6 OTHER USEFUL FUNCTIONS................................................................	39
15	OPERATOR MENU – MOISTURE ANALYSIS .............................................	42
15.1	Moisture analysis without using the program library.........................................................	42
Setting drying parameters..................................................................................................................		42
How to implement drying....................................................................................................................		51
15.2	Moisture analysis using the program library ......................................................................	55
Activate program library “P6-01-Libr”...............................................................................................		55
Setting drying parameters..................................................................................................................		55
Select drying parameters and carry out drying ...............................................................................		56
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16	GENERAL INFORMATION CONCERNING MOISTURE ANALYSIS...........	57
16.1	Application ..............................................................................................................................	57
16.2	Basics ......................................................................................................................................	57
16.3	Adjustment to existing measuring method .........................................................................	57
16.4	Preparing a sample ................................................................................................................	58
16.5	Sample material ......................................................................................................................	59
16.6	Sample size / originally weighted in quantity......................................................................	59
16.7	Drying temperature ................................................................................................................	60
16.8	Recommendations / Guidelines............................................................................................	61
17	DATA OUTPUT .............................................................................................	62
17.1	Remote control instructions .................................................................................................	63
18	SERVICING, MAINTENANCE, DISPOSAL ..................................................	64
18.1	Cleaning ..................................................................................................................................	64
18.2	Change fuse ............................................................................................................................	66
18.3	Servicing, maintenance .........................................................................................................	66
18.4	Disposal...................................................................................................................................	66
19	INSTANT HELP.............................................................................................	67
20	DECLARATION OF CONFORMITY..............................................................	68

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1 Technical data

Data	MLB 50-3C		MLB 50-3C110V
Radiator	Infrared (1 x 400 W)
Temperature range	max. 160°C
Maximum load (Max)	50 g
Readability (d)	1 mg
Display accuracy	0,01 %
Weighed portion < 1.5 g
Display accuracy	0,001 %
Weighed portion > 1.5 g
Recommended
adjustment weight, not	50g (F1)
added (class)
Sample size	max. 50 g
Warm-up time	4 h
Heating profiles	Standard drying
	Step-by-step drying
	Quick drying
	Gentle drying
Repeatability for
originally weighted in	0.24 %
quantity 2 g
Repeatability for
originally weighted in	0,04 %
quantity 10 g
Repeatability in weighing
mode (= standard	0,001g
deviation)
Environmental	• +10°C….+40°C ambient temperature
conditions	• max 80% air humidity non-condensing

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Shut-down criteria	• Automatic 1 (shut-down at change of weighing value
	< 1mg within 10 s)
	• Automatic 2 (shut-down at change of weighing value
	< 1mg within 25 s)
	• Automatic 3 (shut-down at change of weighing value
	< 1mg within 60 s)
	• Automatic 4 (shut-down at change of weighing value
	< 1mg within 90 s)
	• Automatic 5 (shut-down at change of weighing value
	< 1mg within 120 s)
	• Manual
	• Time-controlled (1 min – 9h 59 min)
Sample dishes included	10 (Ø 92 mm)
Display after drying	Moisture [%] =			0 – 100 %
	Weight loss from starting weight (SW)
Display can be switched at
	Dry mass [%] =			100 – 0 %
any time	Residual weight (RW) left from starting weight
	(SW)
	ATRO[%] [(SG – RG) : RG ] x 100%			0 – 999 %
	Residual weight			[g]
Dimensions	Housing 206 x 333 x 192 mm
	Available drying chamber 120 x 120 x 20 mm
Net weight		4.9 kg
Electric Supply	230V/420W 50 Hz AC		110V/420W 60 Hz AC

1.1 Dimensions

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2 Device overview

Pos.	Description
1	Heated cover
2	Viewing panel
3	Halogen lamp
4	Sample dish
5	Windshield
6	Removal aid
7	Display
8	Keyboard
9	Adjustable foot

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2.1Keyboard overview

Button	Function
	•	Switch machine on/off
	• Switch display during drying process
	•	Start/finish measurement
	•	Exit menu
	•	Quit
	•	Navigation keys
	• Data export to external device
	• Confirm / store settings
	•	Taring
	•	Zeroing
	• Go to application menu
		(set drying parameters)
	• Call-up user menu

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2.2Display overview (during measurement)

1.Display in moisture %

2.Current moisture content in %.

3.Results display in moisture %

4.Heating profile

5.Shutoff criterion

6.Previous drying time

7.Current temperature

8.Drying process active

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3 Basic Information (General)

3.1Proper 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.

3.2Improper 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 balance.

The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing.

3.3Warranty

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

3.4Monitoring of Test Resources

In the framework of quality assurance the measuring-related properties of the 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.

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4 Basic Safety Precautions

4.1Pay 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.

4.2Personnel training

The device may be used and serviced only by trained staff.

4.3Danger Information

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 instrument 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 instrument 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 instruments.

Hazards during and after measuring

!Ensure correct installation of all components, see chap. 6.2

!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 instrument by the marked handles.

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CAUTION

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 extractor 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 dish and the heating unit may be very hot.

CAUTION

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 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.

WARNING

Substances that contain toxic or corrosive ingredients, produce toxic gases when drying, cause irritation (eyes, skin, airways), 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.

+Sample materials developing aggressive vapours (e. g. acids) may cause corrosion problems on some parts of the instrument.

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5 Transport and storage

5.1Testing upon acceptance

When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage.

5.2Packaging / 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.

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Secure all items against slipping or damage.

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6 Unpacking, Setup and Commissioning

6.1Installation 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.

On the installation site observe the following:

!Remove explosion prone and easily flammable material in the immediate vicinity.

Emerging vapours, sample dish 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 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.

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6.2Unpacking and assembly

Take the moisture meter carefully out of its packaging, remove the plastic jacket and install it at the designated work space.

The moisture meter is supplied part-assembled. Control whether the delivery is complete immediately after unpacking the individual parts and assemble the separate component parts according to the enclosed diagram.

Sample dish

Dish retainer

Removal aid

Windshield

Windshield base plate

Put on the dish retainer carefully, ensuring correct positioning:

Level instrument with foot screws until the air bubble of the water balance is in the prescribed circle.

Check levelling regularly.

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6.2.1 Scope of delivery Serial accessories:

•Moisture analyzer, see illustration chap. 2

•10 sample dishes

•Power cable

•Operating manual

6.3Mains 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 scales to the power grid unless the information on the scales (sticker) matches the local mains voltage.

Important:

Does the rating match the standard local mains current?

-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.

6.4Switch on/switch off device

Press the ON/OFF key. The unit will carry out a self-test. The device is ready for measuring as soon as 0.000 g appears on the weighing display. If the display deviates from zero, operate the TARE key.

For short pauses in measurement, switch off device at ON/OFF switch and do not disconnect from mains.

Stability display

If the display shows the stability display [ ] the balance is in a stable status. If the status is instable the [ ] display disappears.

Balance zero display

Should the balance not display exactly zero despite empty balance pan, wait for stability display and press the TARE button. The balance start with resetting to zero and the symbol "a" will appear.

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6.5Connection of peripheral devices

Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the balance from the power supply.

With your balance, only use accessories and peripheral devices by KERN, as they are ideally tuned to your balance.

6.6Initial Commissioning

In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1).

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.

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7 Weigh/tare

 Weighing

Switch on with ON/OFF switch.

Place load on and off weighing platform several times before weighing.

Place items to be weighed on platform and wait for stability indicator [] to appear; take weight reading.

Tare

Tare device with TARE button if using a weighing container. The tare weight is saved until it is deleted.

Note:

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. After removing the taring container the total weight is displayed as negative display.

Delete tare

Remove weight from scales and press TARE button, the zero display will appear.

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8 Menu

The menu is arranged in a user and operator menu. The scales are adjusted to user requirements in the user menu; setting of drying parameters is carried out in the application menu. The user menu is displayed using the F switch, the application menu is displayed using the MENU switch.

			User menu
P1	CAL			Adjustment
	P1	01	ECAL	External adjustment
	P1	02 tCAL		Adjustment test
	P1	03 tE_CAL		Temperature adjustment
	P1	04	CALr	Record print out	yes/no
	P1	05 tSt_Co		Temperature calibration
P2	GLP			Best laboratory practice
	P2	01	USr	User
	P2	02	PrJ	Project
	P2	03	Ptin	Print time	yes/no
	P2	04	PdAt	Datum	yes/no
	P2	05	PUSr	User	yes/no
	P2	06	PPrJ	Print project	yes/no
	P2	07	PId	Print serial no.	yes/no
	P2	08	PFr	Frame printout	yes/no
P3	time			Date/time
	P3	01	StinnE	Date format	M/T/J; T/M/J
	P3	02	SdAtE	Time format	12 h; 24 h
P4	rEAd			Basic Settings
	P4-01 AuE			Filter settings	Stand/Slouu/FASt
	P4-02 Auto			Auto zero	On/OFF
P5	Print			RS232-parameters
	P5-01 bAud			Baud rate	2400/4800/9600/19200
	P5-02 PStb			Show unstable weight readings	YES/no
	P5-03 LinE_t			Output interval	1/2/3/5/10/20/30/60/120/180
	P5-04 Prn-Pc			Output to PC	YES/no
P6	other			Other useful functions
	P6-01 Libr			Program library	YES/no
	P6-02 bL			Display background illumination	On/Aut/OF
	P6-03 bLba			Brightness of display	No/10/20/30/40/50/60/70/80/90/100
	P6-04 bEEP			Key sound	yes/no
	P6-05 PrnS			Print out “Current menu
				settings”
	P6-06 Preuer			Not documented	yes/no
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Navigation in the menu:

Button	Function in Menu
	•	Enter user menu
	• Scroll to next page
	•	Reduce digit
	•	Scroll back
	•	Change parameter value
	•	Increase digit
	•	Submenu/Parameter call-up
	• Shift selection of number to be changed to the right
	• Exit sub-menu/parameter, return to menu
	• Shift selection of number to be changed to the left
	•	Confirm/save settings
	• Quit function without changing the settings
	•	Back to menu

Storing / jumping back to weighing mode

Any changes made in the balance memory will only be saved when the storing process is complete.

To achieve this, press the key several times until “SAVE“? appears.

Any changes carried out are stored by pressing the key.

To cancel changes, press the key.

Afterwards the balance automatically jumps back to weighing mode.

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