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1  Safety

4

K-370/371

 

Quick Guide, Version B

Safety

This chapter points out the safety concept of the instrument and contains general rules of behavior 
and warnings from hazards concerning the use of the product.
The safety of users and personnel can only be ensured if these safety instructions are strictly observed 
and followed. 

1 .1 

Proper use

The instrument has been designed and built for laboratories. It serves for nitrogen determination 
according to Kjeldahl. The AutoKjeldahl Unit K-70 as stand-alone instrument may also be used for 
distillations of steam-volatile substances.
In order to guarantee proper function of the transfer process, all sample particles must be smaller than 
1.5 mm.

1 .2 

Improper use

Applications not mentioned above are improper. Also applications which do not comply with the tech-
nical data are considered improper.
The operator bears the sole risk for any damages caused by such improper use.
The following uses are expressly forbidden:

Use of the instrument in rooms which require ex-protected instruments.
 Use on samples which can explode or inflame (e.g.: explosives, etc.) due to shock, friction, heat or 
spark formation.

1 .3 

Instrument-related hazards

Warning

Surface temperature exceeds 60 °C.

WARNING

Risk of injury.

Never operate the instrument when glassware is damaged.

1 .4 

Other hazards

Fundamental dangers arise from 

hot acids and lye
flammable gases or solvent fumes in the direct vicinity of the instrument
damaged glass parts
insufficient distance between the instrument and the wall
burns caused by contact with hot glass parts
burns caused by contact with steam at the waste-outlet
defective transfer tube: escape of steam and/or sulfuric acid








Содержание K-370

Страница 1: ...93131en K 370 371 Kjeldahl Sampler System Quick Guide...

Страница 2: ......

Страница 3: ...ata input 10 4 1 3 Blank determination 12 4 1 4 Definition of blank consideration 14 4 1 5 Sample determination 16 5 View and print results 17 5 1 View results 17 5 2 Printing results 17 6 Daily maint...

Страница 4: ...above are improper Also applications which do not comply with the tech nical data are considered improper The operator bears the sole risk for any damages caused by such improper use The following use...

Страница 5: ...ir work requiring the opening or removal of instrument covers may only be carried out by trained personnel and with the tools provided for this purpose WARNING Hot surface The steam generator heats up...

Страница 6: ...libration Press Run and follow the SOP given by the software 2 3 Priming Priming is used to prepare the entire system Prior to the priming procedure check the chemical level and switch on the cooling...

Страница 7: ...holding time 10 min This is done by means of a clean and empty sample tube It is recommended to perform a preheating when the glass splash protector has cooled down The preheating time is predefined...

Страница 8: ...se 3 2 Defining a sample rack and adding sample information to this rack Select Configurator Rack and press New Select the Group and User to which you want to assign the new Rack Press Page twice and...

Страница 9: ...vate it them by pressing the Enter key Press Set and then 4 times Close 3 5 Measuring samples in a rack with blank consideration Place the samples for the measurement into the 20 rack Select Operator...

Страница 10: ...1 1 Group definition Use the Group Default or define a new Group Select Configurator Group and press New Enter a Group Name e g Meat 1006 Press Save then press Close 4 1 2 Data input Select Configura...

Страница 11: ...ank 21 Press New to enter information for the next sample Press Yes to save the information for Blank 21 Fill in the sample information E g Name Sample 20 Weight 2 879 Type Sample Protein Factor 6 25...

Страница 12: ...sion B Press Close three times 4 1 3 Blank determination NOTE This step only needs to be carried out when sample definition in a group should be performed with blank correction Select Operator Determi...

Страница 13: ...s of the determination method At the end of the determination State will show Ready Press Page to see the Result of Blank 20 Place the next tube Blank 21 into the instru ment Press the Mode key to swi...

Страница 14: ...oup should be performed with blank correction The mean value of the blank determinations Blank 20 and Blank 21 is set to be considered for the following determination of samples Select Operator Determ...

Страница 15: ...an value Enter the definition for the calculation of the mean value E g Name Mean Blank 20 21 Group Meat 1006 Lower mean limit 0 0010 ml Upper mean limit 0 6000 ml Std deviation limit 0 050 ml Press C...

Страница 16: ...Run The display switches to the Status mode and shows the different steps of the determination method At the end of the determination State will show Ready Press Page to see the Result of Sample 20 Or...

Страница 17: ...rator Data Manager Result Group Group Name e g Meat 1006 Press the Enter key to see details of the determination e g Sample 20 Press Blank to see the considered blank value NOTE The defined blank valu...

Страница 18: ...e system should be rinsed thoroughly by carrying out a cleaning The splash protector and the condenser are rinsed with water to remove sodium hydroxide residues With regular cleaning the lifetime of t...

Страница 19: ...ion IEC 61010 2 081 VDE 0411 Safety requirements for electrical equipment for measurement control and laboratory use Particular requirements for automatic and semi automatic laboratory equipment for a...

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Страница 22: ...B CHI Labortechnik AG CH 9230 Flawil 1 Switzerland T 41 71 394 63 63 F 41 71 394 65 65 093131 www buchi com Quality in your hands...

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