Table of Contents
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Table of contents:
1
Technical data ________________________________________________________ 30
2
Declaration of conformity _______________________________________________ 31
3
Fundamental information (general) _______________________________________ 32
3.1
Intended use ___________________________________________________________ 32
3.2
Inappropriate use_______________________________________________________ 32
3.3
Protective measures _____________________________________________________ 32
3.4
Warning ______________________________________________________________ 32
3.5
Guarantee _____________________________________________________________ 33
3.6
Monitoring the test substances ____________________________________________ 33
4
Fundamental safety information __________________________________________ 34
4.1
Observe the information in the operating instructions ________________________ 34
4.2
Staff training __________________________________________________________ 34
5
Transport and storage __________________________________________________ 34
5.1
Acceptance check _______________________________________________________ 34
5.2
Packaging _____________________________________________________________ 34
6
Unpacking, installation and commissioning_________________________________ 35
6.1
Place of installation, place of use __________________________________________ 35
6.1.1
Installation__________________________________________________________________ 35
6.1.2
List of items supplied _________________________________________________________ 35
6.2
Mains supply __________________________________________________________ 36
6.3
Connecting peripheral equipment _________________________________________ 36
6.4
Initial start-up _________________________________________________________ 36
6.5
Adjustment ____________________________________________________________ 37
6.6
Adjusting______________________________________________________________ 37
28
KERN MLB50-3
Version 1.0 05/2003
Operating Instructions
Moisture Analyzer
MLB50-3-BA-defsi-0310
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Summary of Contents for KERN MLB50-3
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Page 1: Table Of Contents
KERN MLB50-3 Version 1.0 05/2003 Operating Instructions Moisture Analyzer Table of contents: Technical data ________________________________________________________ 30 Declaration of conformity _______________________________________________ 31 Fundamental information (general) _______________________________________ 32 Intended use ___________________________________________________________ 32 Inappropriate use_______________________________________________________ 32 Protective measures _____________________________________________________ 32 Warning ______________________________________________________________ 32... - Page 2 9.3.1 Test accuracy________________________________________________________________ 50 RS232 serial interface ________________________________________________ 51 10.1 Print format ___________________________________________________________ 51 10.2 Changing languages _____________________________________________________ 53 Maintenance, upkeep, disposal _________________________________________ 53 11.1 Cleaning ______________________________________________________________ 53 11.2 Maintenance, upkeep____________________________________________________ 53 11.3 Disposal _______________________________________________________________ 53 Troubleshooting _____________________________________________________ 54 MLB50-3-BA-defsi-0310...
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Page 3: Technical Data
1 Technical data KERN MLB 50-3 Maximum load rating (max.) 50 g Minimum for drying 0.02 g Temperature range 50°C-160°C Setting the temperature in 1°C stages Pre-heating stage (boost) Read off (d) 0.001g /0.01% Repeatability in weighing 0.001 g (=standard divergence) -
Page 4: Declaration Of Conformity
KERN MLB 50-3 Mark applied EU Directive Standards 73/23EEC Low voltage EN 60950 89/336EEC EMC EN 50081-1 EN 50082-1 Date: 01.05.2003 Signature: Gottl. KERN & Sohn GmbH Management Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149 MLB50-3-BA-defsi-0310... -
Page 5: Fundamental Information (General)
Sample materials which produce corrosive vapours (e.g. acids) can cause problems of corrosion of components. The MLB50-3 should be used primarily for drying hy- drous substances. The MLB50-3 must not be used to analyse highly inflammable samples which pre- sent an explosion hazard. -
Page 6: Guarantee
For this purpose, the answerable user must define a suitable interval as well as the nature and scope of this check. Information is available on KERN’s home page (www.kern- sohn.com) with regard to the monitoring of balance test substances and the test... -
Page 7: Fundamental Safety Information
4.1 Observe the information in the operating instructions Please read the operating instructions carefully before erecting and commissioning, even if you already have experience with KERN balances. 4.2 Staff training The device may only be operated and looked after by trained members of staff. -
Page 8: Unpacking, Installation And Commissioning
Standard accessories: Available optional accessories: - Balance including humidity - Aluminium trays (item no.:MLB-A01) identifier attachment - Glass fibre filter (item no.:RH-A02) - Tray holder - Temperature calibration set - 10 sampling trays - (item no.:MLB-A03) - Mains cable MLB50-3-BA-defsi-0310... -
Page 9: Mains Supply
The balance must be disconnected from the mains before connecting or disconnect- ing additional equipment (printer, PC) to or from the data interface. Only use KERN accessories and peripheral equipment with your balance. These have been ideally coordinated to your balance. -
Page 10: Adjustment
Now remove the adjusting weight from the weighing plate. The adjusting process is completed. The adjusting weight can be re-applied in order to check the calibration. If the displayed value is not correct, adjusting should be re- peated. MLB50-3-BA-defsi-0310... -
Page 11: Moisture Determination
Apply tough and sticky products thinly. the use of circular glass-fibre filters or quartz-sand is recommended. Weight loss through spattering can be prevented by covering the sample with a circular glass fibre filter. If circular glass-fibre filters or quartz-sand are used the weight must be subtract by tarring. MLB50-3-BA-defsi-0310... -
Page 12: Drying Temperature
(the higher the temperature, the higher the water vapour pressure). Similar results can be achieved using other humidity identification methods (e.g. cabinet dryer) by experimental optimisation of the setting parameters such as tem- perature, heating grade and shut-down criteria. MLB50-3-BA-defsi-0310... -
Page 13: Application Table (Recommendations)
Margarine Mayonnaise 56.5 Powdered milk Milk choco- late Red wine 97.4 15-20 Chocolate powder Sunflower oil 10-14 Instant soup 4.5-7 powder Sugar 11.9 Milk Flour 8-10 12.5 Cement 8-12 Paper Sludge 11-12 Polyamide Dust 5-10 8-15 Charcoal 8-10 8-10 MLB50-3-BA-defsi-0310... -
Page 14: Temperature Calibration / Adjustment
If a temperature of 20°C is entered, a number of approxi- mately 4000 will appear on the display screen. key is now used to start temperature calibration. The balance will now heat up to 50% of its total power. MLB50-3-BA-defsi-0310... -
Page 15: Setting The Parameters
4 - 7. Press the key again and ”tEmP“ will appear on the display screen. (Details chapter: Drying temperature “ tEmP “) Press the key again and “Strob “ will appear on the display screen. (Details chapter: Data query interval) MLB50-3-BA-defsi-0310... -
Page 16: Temperature Correction On "Subst" Test Object
110°C, the correction is 0.10. Typical materials with high temperature radiation: Material Set temperature Measured Correction factor temperature 100°C 103.7°C 0.04 Flour Coal dust 100°C 122°C 0.22 100°C 120.5°C 0.20 Damp tea leaves 100°C 108.5°C 0.08 Dry tea leaves Cement 100°C 121°C 0.21 MLB50-3-BA-defsi-0310... -
Page 17: Setting The Correction Factor
If the entered correction factor is > 0.99, “FALSE “ will appear on the display screen and the entry will not be adopted. Repeat the entry using a new factor (<1) . If you now activate the stored correction factor during testing, this will be allowed for. MLB50-3-BA-defsi-0310... -
Page 18: Modes "Mode
Drying is concluded if the weighing result of three consecutive heating intervals re- mains unchanged or if the time deadline has expired. Mode 7: Percentage humidity (%) Weight loss as against initial value Drying is concluded if the time limit has expired. MLB50-3-BA-defsi-0310... -
Page 19: Maximum Drying Time "Inter
Used to change the entry point on the display screen Transmits the test or weighing results to a printer via the RS-232 inter- face. Starts the drying procedure. Sets the display to zero in weighing mode. The drying process can be aborted by pressing the stop key. MLB50-3-BA-defsi-0310... -
Page 20: Overview Of The Display Screen
Only now (!) place object on the weighing pan. Make sure that the weighing object does not stripe or touch the housing or base. Now the weight will be indicated. If the object should be heavier than the weighing range allowance, “FULL“ (over- load) will appear on the display. MLB50-3-BA-defsi-0310... -
Page 21: Taring ( Key)
The taring procedure can be repeated continuously, for instance when mixing several components. The limit is reached when the full weighing range is overlaid. After having removed the jiffy the total weight will appear flashing as a minus indica- tion. MLB50-3-BA-defsi-0310... -
Page 22: Determination Of Humidity
Apply viscous and gluey samples in thin layers. It is ad- visable to use a glass fibre filter. Avoid weight loss due to splashes by covering the sample with a glass fibre filter. Remember to tare off the weight of the glass fibre filter. Diagram 1 MLB50-3-BA-defsi-0310... -
Page 23: Test Accuracy
If you wish to ensure that the time interval between two data transfers has been se- lected correctly, it is necessary to carry out an additional test using longer time inter- vals. In the event that a significant divergence is determined when comparing both humidity values, the time interval should be extended. MLB50-3-BA-defsi-0310... -
Page 24: Rs232 Serial Interface
The results are transmitted via the RS-232 interface according to the set time inter- vals during the test procedure (chapter 8.5 time interval of the ”Strob“ data query). The format of this signal is: xxx.xx %<CR><LF> xxx.xx The current result is displayed. MLB50-3-BA-defsi-0310... - Page 25 The result is shown on the display screen once the test procedure has been com- pleted. This value can be printed off by using the key. Print-out is not possible once the value has been deleted from the display screen. MLB50-3-BA-defsi-0310...
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Page 26: Changing Languages
Remove any spilt material to be weighed immediately. 11.2 Maintenance, upkeep The device may only be opened by trained service engineers authorised by KERN. Disconnect from the mains supply before opening. 11.3 Disposal The operating company shall dispose of the packaging and the device in compliance with the valid national or regional law of the operating location. -
Page 27: Troubleshooting
• Electromagnetic fields / static charging (choose different location/switch off inter- fering device if possible) Switch the balance off if other error messages should appear and then switch on a- gain. Contact the manufacturer if the error message does not disappear. MLB50-3-BA-defsi-0310...
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Questions and answers
"The specification requires a one-hour analysis at 105°C, with internal temperatures, as measured by thermocouple, not exceeding 60°C, whereas the device displays 105°C." Device MLB-50-3
The internal temperature limits for the KERN MLB 50-3 during a one-hour analysis at 105°C are between 15°C and 35°C ambient temperature, as specified in the manual.
This answer is automatically generated