K-365 Kjel Line
Operation Manual
11594238 | A en
Imprint
Product Identification:
Operation Manual (Original) K-365 Kjel Line
11594238
Publication date: 07.2021
Version A
BÜCHI Labortechnik AG
Meierseggstrasse 40
Postfach
CH-9230 Flawil 1
E-Mail: quality@buchi.com
BUCHI reserves the right to make changes to the manual as deemed necessary in the light of experience,
especially with respect to structure, illustrations and technical details.
This manual is copyrighted. Information from it may neither be reproduced, distributed, or used for
competitive purposes, nor made available to third parties. The manufacture of any component with the
aid of this manual without prior written agreement is also prohibited.
Büchi Labortechnik AG Table of contents
Table of contents
1 About this document........................................................................................................... 9
1.1 Mark-ups and symbols ..........................................................................................................9
1.2 Trademarks ...........................................................................................................................9
1.3 Connected devices ................................................................................................................9
2 Safety..................................................................................................................................10
2.1 Proper use ...........................................................................................................................10
2.2 Use other than that intended ...............................................................................................10
2.3 Staff qualification .................................................................................................................10
2.4 Personal protective equipment ............................................................................................11
2.5 Warning notices in this document........................................................................................ 11
2.6 Warning and directive symbols............................................................................................ 11
2.7 Protection devices ...............................................................................................................12
2.8 Residual risks ......................................................................................................................12
2.8.1 Hot surfaces ...........................................................................................................13
2.8.2 Faults during operation...........................................................................................13
2.8.3 Glass breakage ......................................................................................................13
2.8.4 Not suitable titrators................................................................................................ 13
2.8.5 Dosing pump defect................................................................................................ 13
2.9 Modifications........................................................................................................................13
3 Product description...........................................................................................................14
3.1 Description of function .........................................................................................................14
3.2 Configuration .......................................................................................................................14
3.2.1 Front view ...............................................................................................................14
3.2.2 Rear view................................................................................................................ 16
3.2.3 Receiving area........................................................................................................ 16
3.2.4 Communication connections ..................................................................................18
3.2.5 Connections on the rear side.................................................................................. 20
3.3 Scope of delivery .................................................................................................................24
3.4 Type plate............................................................................................................................24
3.5 Technical data .....................................................................................................................24
3.5.1 K-365 Kjel Line .......................................................................................................24
3.5.2 Ambient conditions .................................................................................................26
3.5.3 Materials .................................................................................................................26
3.5.4 Installation site........................................................................................................27
4 Transport and storage ......................................................................................................28
4.1 Transport .............................................................................................................................28
4.2 Storage ................................................................................................................................28
4.3 Lifting the instrument ...........................................................................................................28
Operation Manual K-365 Kjel Line iii
Table of contents Büchi Labortechnik AG
5 Installation..........................................................................................................................29
5.1 Before installation ................................................................................................................29
5.2 Establishing electrical connections......................................................................................29
5.3 Securing against earthquakes .............................................................................................29
5.4 Installing the cooling water supply.......................................................................................30
5.4.1 Installing a tap water supply (option) ...................................................................... 30
5.4.2 Installing the recirculating chiller on the condenser (option)................................... 30
5.5 Installing the drain tubing (option) .......................................................................................31
5.6 Installing the waste pump connection (BasicKjel, MultiKjel, MultiKjel T only) .....................31
5.7 Installing the sample waste pump connection (MultiKjel T only) .........................................32
5.8 Installing the H₂O supply for steam generation ...................................................................32
5.9 Installing NaOH supply (MultiKjel, MultiKjel T only)............................................................. 33
5.10 Installing H₃BO₃ supply (MultiKjel, MultiKjel T only) ............................................................33
5.11 Installing the H₂O supply for the sample tube (MultiKjel, MultiKjel T only) ..........................34
5.12 Installing the level sensor on the canister (option) ..............................................................35
5.13 Installing a titrator with LAN (MultiKjel T with Eco Titrator only) .......................................... 35
5.14 Installing a titrator with RS232 (MultiKjel only) ....................................................................36
5.15 Installing a dispenser (MultiKjel T only) ...............................................................................37
5.16 Installing the reaction detection sensor (MultiKjel T only) ...................................................37
5.17 Installing a SD card (Interface pro only) ..............................................................................37
5.18 Installing the level detection sensor (option) .......................................................................37
5.19 Installing the stirrer (MultiKjel only)...................................................................................... 38
6 Description of the interface ..............................................................................................39
6.1 Layout of the interface .........................................................................................................39
6.2 Function bar interface..........................................................................................................40
6.3 Menu bar interface...............................................................................................................40
6.3.1 Home menu ............................................................................................................41
6.3.2 Manual control menu ..............................................................................................41
6.3.3 Method menu.......................................................................................................... 41
6.3.4 Configuration menu ................................................................................................41
6.3.5 Determination data menu .......................................................................................43
6.4 Status bar interface .............................................................................................................43
7 Description of the interface pro .......................................................................................45
7.1 Layout of the interface pro...................................................................................................45
7.2 Function bar interface pro....................................................................................................46
7.3 Menu bar interface pro ........................................................................................................47
7.3.1 Home menu ............................................................................................................47
7.3.2 Manual control menu ..............................................................................................47
7.3.3 Method menu.......................................................................................................... 48
7.3.4 Configuration menu ................................................................................................48
7.3.5 Determination data menu .......................................................................................50
7.4 Status bar interface pro .......................................................................................................50
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG Table of contents
8 Preparations for a determination .....................................................................................52
8.1 Editing the preheating function ............................................................................................52
8.2 Editing the priming function .................................................................................................52
8.3 Editing the single determination ..........................................................................................52
8.3.1 Changing the name of the single determination ..................................................... 52
8.3.2 Selecting the determination type for a single determination...................................53
8.3.3 Selecting the method for a single determination ....................................................53
8.3.4 Changing the sample quantity for single determination.......................................... 54
8.3.5 Changing the unit for a single determination .......................................................... 54
8.4 Editing a series ....................................................................................................................55
8.4.1 Creating a new series.............................................................................................55
8.4.2 Changing the name of a series............................................................................... 55
8.4.3 Adding a determination to a series ......................................................................... 56
8.4.4 Deleting a determination from a series...................................................................56
8.4.5 Changing the determination name for a series....................................................... 56
8.4.6 Selecting the determination type within a series ....................................................57
8.4.7 Selecting the method for a determination within a series ....................................... 58
8.4.8 Changing the sample quantity for determination within a series ............................58
8.4.9 Changing the amount unit for a determination within a series................................ 58
8.5 Editing a template................................................................................................................59
8.5.1 Creating a new template......................................................................................... 59
8.5.2 Changing the name of a template ..........................................................................60
8.6 Editing a method..................................................................................................................60
8.6.1 Creating a new method ..........................................................................................60
8.6.2 Deleting a method ..................................................................................................60
8.6.3 Changing the name of a method ............................................................................61
8.6.4 Changing the reaction detection for a method (option for MultiKjel only) ............... 61
8.6.5 Changing the H₂O volume for a method (MultiKjel only) ........................................62
8.6.6 Changing the H₂SO₄ volume for a method (MultiKjel only)..................................... 62
8.6.7 Changing the NaOH volume for a method (MultiKjel only).....................................63
8.6.8 Changing the acid volume for a method (BasicKjel, MultiKjel only) .......................63
8.6.9 Changing the reaction time for a method (BasicKjel, MultiKjel only) ...................... 64
8.6.10 Changing the number of steam steps for a method ...............................................64
8.6.11 Changing the time a steam step is carried out for a method .................................. 65
8.6.12 Changing the steam power for a method ...............................................................66
8.6.13 Changing the level detection sensor settings (option) for a method....................... 66
8.6.14 Changing the distillation time for a method ............................................................67
8.6.15 Changing the distillation stirring speed for a method (MultiKjel T only)..................67
8.6.16 Changing the titration type for a method (MultiKjel T only)..................................... 68
8.6.17 Changing the H₃BO₃ volume for a method (MultiKjel only)..................................... 68
8.6.18 Changing the dosing unit volume for a method (MultiKjel T only) ..........................69
8.6.19 Changing the titration stirring speed for a method (MultiKjel T only)......................69
8.6.20 Changing the titration start time for a method (MultiKjel T only)............................. 69
8.6.21 Changing the aspiration time for the sample tube for a method (BasicKjel, MultiKjel,
MultiKjel T only) ......................................................................................................70
8.6.22 Changing the aspiration time for the receiving vessel for a method (MultiKjel T only)
................................................................................................................................70
8.7 Editing user setting ..............................................................................................................71
8.7.1 Creating a new user ...............................................................................................71
8.7.2 Deleting a user .......................................................................................................71
8.7.3 Changing the name of a user .................................................................................72
Operation Manual K-365 Kjel Line v
Table of contents Büchi Labortechnik AG
8.7.4 Selecting a user......................................................................................................72
8.8 Installing the sample tube....................................................................................................72
8.9 Installing a receiving vessel.................................................................................................73
8.10 Preparing the end stop for the sample tube size .................................................................73
8.11 Preparing the level detection sensor (option) ......................................................................74
8.12 Selecting the operation mode..............................................................................................74
8.13 Dosing manually ..................................................................................................................74
8.13.1 Dosing H₂O manually .............................................................................................74
8.13.2 Dosing NaOH manually ..........................................................................................75
8.13.3 Dosing H₃BO₃ manually..........................................................................................75
8.14 Aspirating manually .............................................................................................................75
8.14.1 Aspirating the sample tube manually...................................................................... 75
8.14.2 Aspirating the receiving vessel manually................................................................ 76
8.15 Changing the stirring speed manually .................................................................................76
9 Carrying out a determination ...........................................................................................78
9.1 Preparing the instrument .....................................................................................................78
9.2 Starting a determination ......................................................................................................78
9.3 Ending a determination........................................................................................................79
9.4 Shutting down the instrument ..............................................................................................79
9.5 Filtering determination data .................................................................................................79
9.6 Showing determination data ................................................................................................79
9.7 Deleting determination data.................................................................................................79
9.7.1 Deleting one determination..................................................................................... 79
9.7.2 Deleting all determination data ............................................................................... 80
9.8 Exporting determination data (Interface pro only) ...............................................................80
9.8.1 Exporting one determination (Interface pro only) ...................................................80
9.8.2 Exporting all determination data (Interface pro only)..............................................80
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG Table of contents
10 Cleaning and servicing .....................................................................................................81
10.1 Regular maintenance work..................................................................................................82
10.2 Cleaning and servicing the sample tube.............................................................................. 82
10.3 Cleaning the glass components ..........................................................................................83
10.4 Cleaning and servicing the hoses and hose connections.................................................... 83
10.5 Cleaning and servicing the sample tube seal ......................................................................83
10.6 Cleaning and servicing the splash protector........................................................................ 84
10.7 Cleaning and servicing the steam inlet and condenser outlet tube .....................................84
10.8 Cleaning the housing...........................................................................................................84
10.9 Cleaning and servicing the warning and directive symbols ................................................. 84
10.10 Cleaning and servicing the bridge splash protector to condenser.......................................84
10.11 Cleaning and servicing the dosing pumps...........................................................................84
10.12 Cleaning and servicing the condenser ................................................................................84
10.13 Cleaning and servicing the steam generator .......................................................................85
10.14 Calibrating the pumps..........................................................................................................85
10.14.1 Calibrating the H₂O pump.......................................................................................85
10.14.2 Calibrating the acid pump.......................................................................................86
10.14.3 Calibrating the NaOH pump ...................................................................................86
10.14.4 Calibrating the H₃BO₃ Pump...................................................................................87
10.15 Decalcifying the instrument .................................................................................................87
10.16 Replacing the splash protector ............................................................................................88
10.17 Replacing the condenser.....................................................................................................89
10.18 Attaching and removing the protection shield...................................................................... 89
10.18.1 Removing the protection shield ..............................................................................89
10.18.2 Attaching the protection shield ...............................................................................90
10.19 Cleaning the drip tray ..........................................................................................................90
10.20 Rinsing a pump....................................................................................................................90
10.21 Replacing the sample tube seal ..........................................................................................90
11 Help with faults ..................................................................................................................92
11.1 Troubleshooting digestion ...................................................................................................92
11.2 Troubleshooting distillation ..................................................................................................93
11.3 Troubleshooting instrument .................................................................................................95
11.4 Turning the splash protector nut..........................................................................................97
12 Taking out of service and disposal.................................................................................. 98
12.1 Taking out of service ...........................................................................................................98
12.2 Disposal...............................................................................................................................98
12.3 Returning the instrument .....................................................................................................98
12.4 Removing water from the steam generator .........................................................................98
Operation Manual K-365 Kjel Line vii
Table of contents Büchi Labortechnik AG
13 Appendix ............................................................................................................................99
13.1 Spare parts and accessories ...............................................................................................99
13.1.1 Accessories ............................................................................................................99
13.1.2 Splash protector spare parts ................................................................................100
13.1.3 Tank spare parts................................................................................................... 101
13.1.4 Condenser spare parts .........................................................................................101
13.1.5 Titration spare parts.............................................................................................. 102
13.1.6 Sample tubes........................................................................................................ 103
13.1.7 Cable and tubing ..................................................................................................103
13.1.8 Other spare parts.................................................................................................. 104
13.1.9 Consumables........................................................................................................ 104
13.1.10 Maintenance kit ....................................................................................................104
13.1.11 Upgrade kits .........................................................................................................104
13.1.12 Documentation .....................................................................................................105
viii
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
1 About this document
1.1 Mark-ups and symbols
About this document | 1
This operation manual is applicable for all variants of the instrument.
Read this operation manual before operating the instrument and follow the
instructions to ensure safe and trouble-free operation.
Keep this operation manual for later use and pass it on to any subsequent user or
owner.
BÜCHI Labortechnik AG accepts no liability for damage, faults and malfunctions
resulting from not following this operation manual.
If you have any questions after reading this operation manual:
u Contact BÜCHI Labortechnik AG Customer Service.
https://www.buchi.com/contact
NOTE
This symbol draws attention to useful and important information.
R This character draws attention to a requirement that must be met before the
instructions below are carried out.
u This character indicates an instruction that must be carried out by the user.
ð This character indicates the result of a correctly carried out instruction.
Mark-up Explanation
Win dow
Tab
Dia log
[Button] Buttons are marked-up like this.
[Field names] Field names are marked-up like this.
[Menu / Menu item] Menus or menu items are marked-up like this.
Status Status is marked-up like this.
Signal Signals are marked-up like this.
1.2 Trademarks
Product names and registered or unregistered trademarks that are used in this
document are used only for identification and remain the property of the owner in
each case.
Software Windows are marked-up like this.
Tabs are marked-up like this.
Dialogs are marked-up like this.
1.3 Connected devices
In addition to these operating instructions, follow the instructions and specifications
in the documentation for the connected devices.
Operation Manual K-365 Kjel Line
9/106
2 | Safety
Büchi Labortechnik AG
2 Safety
2.1 Proper use
The instrument is designed for steam distillation.
The instrument can be used in laboratories for the following tasks:
Distillation of steam-volatile substances.
2.2 Use other than that intended
The use of the instrument other than described in proper use and specified in
technical data is use other than that intended.
The operator is responsible for damages or hazards that are caused by use other
than that intended.
Specially the following uses are not permitted:
Use of the instrument in areas which require explosion-safe instruments.
Use of samples, which can explode or inflame (example: explosives, etc.) due to
shock, friction, heat or spark formation.
Use of the instrument with other than original BUCHI glassware.
2.3 Staff qualification
Unqualified persons are unable to identify risks and are therefore exposed to greater
dangers.
The device may only be operated by suitably qualified laboratory staff.
These operating instructions are aimed at the following target groups:
Users
Users are persons that meet the following criteria:
They have been instructed in the use of the device.
They are familiar with the contents of these operating instructions and the
applicable safety regulations and apply them.
They are able on the basis of their training or professional experience to assess
the risks associated with the use of the device.
Operator
The operator (generally the laboratory manager) is responsible for the following
aspects:
The device must be correctly installed, commissioned, operated and serviced.
Only suitably qualified staff may be assigned the task of performing the
operations described in these operating instructions.
10/106
The staff must comply with the local applicable requirements and regulations for
safe and hazard-conscious working practices.
Safety-related incidents that occur while using the device should be reported to
the manufacturer (quality@buchi.com).
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
2.4 Personal protective equipment
2.5 Warning notices in this document
Safety | 2
BUCHI service technicians
Service technicians authorized by BUCHI have attended special training courses and
are authorized by BÜCHI Labortechnik AG to carry out special servicing and repair
measures.
Depending on the application, hazards due to heat and/or corrosive chemicals may
arise.
u Always wear appropriate personal protective equipment such as safety goggles,
protective clothing and gloves.
u Make sure that the personal protective equipment meets the requirements of
the safety data sheets for all chemicals used.
Warning notices warn you of dangers that can occur when handling the device.
There are four danger levels, each identifiable by the signal word used.
Signal word Meaning
DANGER Indicates a danger with a high level of risk which could result in
death or serious injury if not prevented.
WARNING Indicates a danger with a medium level of risk which could result in
death or serious injury if not prevented.
CAUTION Indicates a danger with a low level of risk which could result in mi-
nor or medium-severity injury if not prevented.
NOTICE Indicates a danger that could result in damage to property.
2.6 Warning and directive symbols
The following warning and directive symbols are displayed in this operation manual
or on the instrument.
Symbol Meaning
Hot surface
Corrosive
General warning
Operation Manual K-365 Kjel Line
Device damage
Dangerous electrical voltage
11/106
2 | Safety
3
1
2
Büchi Labortechnik AG
Symbol Meaning
Wear protective gloves
Wear safety goggles
Fig.1: Location of the warning and directive symbols
2.7 Protection devices
Fig.2: Protection devices
1 Protection shield 2 Protection shield
3 Stop button
12/106
2.8 Residual risks
The device has been developed and manufactured using the latest technological
advances. Nevertheless, risks to persons, property or the environment can arise if
the device is used incorrectly.
Appropriate warnings in this manual serve to alert the user to these residual
dangers.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
2.8.1 Hot surfaces
2.8.2 Faults during operation
2.8.3 Glass breakage
Safety | 2
The surfaces of the device can become very hot. If touched they can cause skin
burns.
u Do not touch hot surfaces or else wear suitable protective gloves.
If a device is damaged, sharp edges, moving parts or exposed electrical wires can
cause injuries.
u Regularly check device for visible damage.
u If faults occur, switch off the device immediately, unplug the power cord and
inform the operator.
u Do not continue to use devices that are damaged.
Broken glass can cause severe cuts.
Minor damage to the ground joints impairs the sealing effect and may therefore
diminish suction capacity.
Handle the glass components carefully and do not drop them.
Always place the glassware in a suitable holder when they are not in use.
Always visually inspect glass components for damage every time they are to be
used.
Do not continue to use glass components that are damaged.
Always wear protective gloves when disposing of broken glass.
2.8.4 Not suitable titrators
Not suitable titrators can lead to malfunction and wrong results.
u Use recommended titrators only.
2.8.5 Dosing pump defect
A defect dosing pump can spill hazardous liquids on the installation site.
u Set the On / Off master switch to Off.
u Disconnect the power supply.
u Use personal protective equipment to remove the liquid.
u Dispose of the remains of the liquid according to the local legal regulations.
2.9 Modifications
Unauthorized modifications can effect safety and lead to accidents.
u Use only genuine BUCHI accessories, spare parts and consumables.
u Carry out technical changes only with prior written approval from BUCHI.
u Only allow changes to be made by BUCHI service technicians.
BUCHI accepts no liability for damage, faults and malfunctions resulting from
unauthorized modifications.
Operation Manual K-365 Kjel Line
13/106
3 | Product description
3 Product description
3.1 Description of function
3.2 Configuration
Büchi Labortechnik AG
The instrument is suitable for determining nitrogen using the Kjeldahl (TKN; Total Kjeldahl Nitrogen) and Devarda methods as well as for other
distillations of steam-volatile substances (e.g. of
alcohol).
Steam is introduced into the sample solution to
drive out volatile components (such as
ammonia, alcohol, etc.).
After condensation in the condenser the
condensate is collected in a receiver solution in
the receiving vessel.
3.2.1 Front view
NOTE
The interface differs according to the configuration:
u Interface (Chapter6 "Description of the interface", page39)
ð EasyKjel, BasicKjel (option)
u Interface Pro (Chapter7 "Description of the interface pro", page45)
ð BasicKjel (option), MultiKjel, MultiKjel T
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
4
3
5
9
8
7
1
2
6
Product description | 3
Fig.3: Front view
1 Splash protector 2 Condenser
3 Ventilation slots 4 On/Off master switch
5 Ventilation slots 6 Receiving area
See Chapter3.2.3 "Receiving area",
page16
7 Sample tube 8 Handle
9 Interface
(according to the instrument configuration)
Operation Manual K-365 Kjel Line
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3 | Product description
4
14
12
11
10
13
1
2
3
5
6
7
9 8
3.2.2 Rear view
Büchi Labortechnik AG
Fig.4: Rear view
1 Communication connections
See Chapter3.2.4 "Communication
connections", page18
3 Ventilation slots 4 Dosing pumps window
5 Connections on the rear side
See Chapter3.2.5 "Connections on
the rear side", page20
7 Cooling water out 8 Drain connection
9 Cooling water in 10 Ventilation slots
11 Rear cable duct 12 Power supply connection
13 Fuses
(resettable)
3.2.3 Receiving area
2 Ventilation slots
6 Steam valve
(according to the instrument configuration)
14 Type plate
See Chapter3.4 "Type plate",
page24
16/106
The receiving area is different for each instrument configuration.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
1
2
3
4
4
6
5
7
11
10
9
1
2
3
8
Product description | 3
Receiving area
Fig.5: Receiving area
1 Rear cable duct 2 Cable duct reaction detection sensor
3 Condenser outlet 4 Receiving vessel area
Receiving area (MultiKjel T only)
Fig.6: Receiving area
1 Cable duct reaction detection sensor 2 Condenser outlet tubing
3 Rear cable duct 4 Tubing for boric acid aspiration
5 Boric acid dosing 6 Retainer stirrer
7 Retainer dosing tip titration 8 Receiving vessel
Operation Manual K-365 Kjel Line
9 Retainer titration sensor 10 Retainer temperature sensor
11 Retainer dosing tip back titration
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3 | Product description
2
3
4
7
1
5
6
3.2.4 Communication connections
Büchi Labortechnik AG
Communication connection EasyKjel
Fig.7: Communication connections
1 BUCHI standard communication port
(COM)
(marked COM)
3 Level detection sensor port
(marked Level Detection)
5 Communication port
(marked RS-232)
7 NaOH tank level sensor port
(marked NaOH)
2 BUCHI standard communication port
(COM)
(marked COM)
4 H₂O tank level sensor port
(marked H₂O)
6 Communication port
(marked RS-232)
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
3
4
5
6
11
10
9
1
2
7
8
Product description | 3
Communication connection BasicKjel
Fig.8: Communication connection
1 LAN port
(marked LAN)
3 BUCHI standard communication port
(COM)
(marked COM)
5 H₂O tank level sensor port
(marked H₂O)
7 Communication port
(marked RS-232)
9 Acid tank level sensor port
(marked Acid)
11 USB port
(marked USB)
2 BUCHI standard communication port
(COM)
(marked COM)
4 Level detection sensor port
(marked Level Detection)
6 Waste tank level sensor port
(marked Sample Tube Waste)
8 Communication port
(marked RS-232)
10 NaOH tank level sensor port
(marked NaOH)
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3 | Product description
3
6
7
8
9
4
5
15
14
13
12
1
2
10
11
Büchi Labortechnik AG
Communication connection MultiKjel
Fig.9: Communication connections
1 LAN port
(marked LAN)
3 BUCHI standard communication port
(COM)
(marked COM)
5 Stirrer port
(marked Stirrer)
7 H₂O tank level sensor port
(marked H₂O)
9 Waste tank level sensor port
(marked Sample Tube Waste)
11 Titrator port
(marked Titrator)
13 Waste tank level sensor port
(marked Receiver Waste)
15 USB port
(marked USB)
2 BUCHI standard communication port
(COM)
(marked COM)
4 BUCHI standard communication port
(COM)
(marked COM)
6 Level detection sensor port
(marked Level Detection)
8 H₃BO₃ tank level sensor port
(marked H₃BO₃)
10 Dispenser port
(marked Dosing Unit)
12 Acid tank level sensor port
(marked Acid)
14 NaOH tank level sensor port
(marked NaOH)
20/106
3.2.5 Connections on the rear side
The connections on the rear side are depending on the version of the instrument.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
1
2
3
4
5
1
2
3
4
5
Product description | 3
Connections on the rear side EasyKjel
The connections are located at the rear side of the instrument. See Chapter3.2.2
"Rear view", page16
Fig.10: Connections on the rear side
1 Reserve 2 H₂O supply for steam generation
3 Reserve 4 Reserve
5 Reserve
Connections on the rear side BasicKjel (option)
The connections are located at the rear side of the instrument. See Chapter3.2.2
"Rear view", page16
Fig.11: Connections on the rear side
1 H₂O supply for sample tube 2 H₂O supply for steam generation
3 Reserve 4 Acid supply for sample tube
5 Reserve
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3 | Product description
2
3
4
5
6
1
Büchi Labortechnik AG
Connections on the rear side BasicKjel (option)
The connections are located at the rear side of the instrument. See Chapter3.2.2
"Rear view", page16
Fig.12: Connections on the rear side
1 Waste pump 2 H₂O supply for sample tube
3 H₂O supply for steam generation 4 Reserve
5 Acid supply for sample tube 6 Reserve
Connections on the rear side MultiKjel
The connections are located at the rear side of the instrument. See Chapter3.2.2
"Rear view", page16
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
2
3
4
5
6
1
3
4
5
6
7
1
2
Product description | 3
Fig.13: Connections on the rear side
1 Waste pump for sample tube 2 H₂O supply for sample tube
3 H₂O supply for steam generation 4 Boric acid supply
5 NaOH supply for sample tube 6 Reserve
Connections on the rear side MultiKjel T
The connections are located at the rear side of the instrument. See Chapter3.2.2
"Rear view", page16
Fig.14: Connections on the rear side
1 Waste pump receiving vessel 2 Waste pump for sample tube
3 H₂O supply for sample tube 4 H₂O supply for steam generation
5 Boric acid supply 6 NaOH supply for sample tube
7 Reserve
Operation Manual K-365 Kjel Line
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3 | Product description
6
7
8
11
9
10
3
2
1
5
4
3.3 Scope of delivery
3.4 Type plate
Büchi Labortechnik AG
NOTE
The scope of delivery depends of the configuration of the purchase order.
Accessories are delivered as per the purchase order, order confirmation, and
delivery note.
The type plate identifies the instrument. The type plate is located at the rear of the
instrument.
Fig.15: Type plate
1 Symbol for "electronics recycling" 2 Initial product code
3 Approvals 4 Symbol for "Do not dispose of as
5 Year of manufacture 6 Power consumption maximum
7 Frequency 8 Input voltage range
9 Serial number 10 Instrument name
11 Company name and address
3.5 Technical data
3.5.1 K-365 Kjel Line
Dimensions (W x D x H) 320 x 400 x 730mm320 x 400 x 730mm320 x 400 x 730
Weight 23 kg 23 kg 23 kg
Connection voltage 220 - 240 ± 10
household waste"
EasyKjel BasicKjel MultiKjel
mm
% VAC
% VAC
220 - 240 ± 10
220 - 240 ± 10
% VAC
24/106
Power consumption 2100 W 2100 W 2100 W
Frequency 50 / 60 Hz 50 / 60 Hz 50 / 60 Hz
IP Code IP20 IP20 IP20
Pollution degree 2 2 2
Overvoltage category II II II
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Product description | 3
EasyKjel BasicKjel MultiKjel
Tap water pressure 1 - 10 bar 1 - 10 bar 1 - 10 bar
Tap water condition
1- 25°C 1 - 25°C 1 - 25°C
(If the temperature is more than
25°C use a recirculating chiller)
Tap water consumption ~ 1.2 L/min ~ 1.2 L/min ~ 1.2 L/min
Approvals CE, CSA CE, CSA CE, CSA
Analysis specifications
EasyKjel BasicKjel MultiKjel
Measuring range N 0.02 – 220 mg 0.02 – 220 mg 0.02 – 220 mg
Analysis time for 30 mg N
(With Metrohm Eco Titrator
without titrator preparation)
Analysis time for 200 mg N
(With Metrohm Eco Titrator
without titrator preparation)
Recovery N: >98% with
- - 3.5 min
- - 5 min
digestion
process
N: >99.5% (direct distillation)
N: >98% with
digestion
process
N: >99.5% (direct distillation)
N: >98% with
digestion
process
N: >99.5% (direct distillation)
Measurement reproducibility
< 0.8 % < 0.8 % < 0.8 %
(Direct distillation of 1 mg N absolute and 300 sec. distillation)
Instrument specifications
EasyKjel BasicKjel MultiKjel
Distillation capacity (100%) ~ 40 mL/min ~ 40 mL/min ~ 40 mL/min
Distillation capacity (10%) ~ 12.5 mL/min ~ 12.5 mL/min ~ 12.5 mL/min
Adjustable distillation power 10 - 100% 10 - 100% 10 - 100%
MaxAccuracy Mode
(Compensation of power grid
fluctuations)
Distillate reproducibility (RSD)
(At 300 seconds distillation time)
AutoDist Mode
(Automatic detection of the con-
densation start)
NaOH pump Yes Yes Yes
Yes Yes Yes
<1% <1% <1%
No Yes Yes
H2O pump No Yes Yes
Acid pump No No No
Operation Manual K-365 Kjel Line
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3 | Product description
Büchi Labortechnik AG
EasyKjel BasicKjel MultiKjel
Boric acid pump No No Yes
Sample disposal No Optional Yes
Receiver disposal No No Optional
Safety sensors Yes Yes Yes
Titration vessel No No Optional
Titrator connection No No Optional
Interface specifications
Display LCD color, 4.3 in LCD color, 7.0 in
Control elements Buttons / control
Max. number of methods 8 96
Max. number of determinations 36 512
Max. number of determinations per series
Max. number of templates 4 16
Max. number of users 4 32
Max. number of determination results 40 256
Language en, de, fr, it, es, pt,
3.5.2 Ambient conditions
For indoor use only.
Interface
EasyDist, BasicDist
Interface pro
BasicDist (option),
MultiDist
Touch-screen / con-
knob
trol knob
16 32
en, de, fr, it, es, pt,
ja, zh, ru, pl, ko, id
ja, zh, ru, pl, ko, id
26/106
Max. altitude above sea level 2000 m
Ambient and storage temperature 5‒40 °C
Maximum relative humidity 80% for temperatures up to 31 °C
decreasing linearly to 50 % relative humidity at 40 °C
3.5.3 Materials
Component Materials of construction
Housing Polyurethane
Housing electric Stainless steel
Steam generator housing Stainless steel
Housing stirrer Glass fiber reinforced polypropylene
Rear cover Polyvinyl chloride
Glass parts Borosilicate 3.3
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
3.5.4 Installation site
Product description | 3
Component Materials of construction
Plastic splash protector Glass fiber reinforced polypropylene
Protective cover PMMA
Sealing CSM
NaOH hose EPDM
Three-way valve PP / PE
The installation site meets the safety requirements. See Chapter2 "Safety",
page10
The installation site has a firm, level and nonslip surface.
The installation site has no obstacles (e.g. water taps, drains, etc.).
The installation site has enough space that the canisters can be placed safely.
The installation site has an own mains outlet socket for the instrument.
The installation site allows that the power supply can be disconnected at any time
in an emergency.
The installation site is not exposed to external thermal loads, such as direct solar
radiation.
The installation site has enough space that cables / tubes can be routed safely.
The installation site meets the requirements for the connected devices. See
related documentation
The installation site meets the specifications according to the technical data (e.g.
weight, dimension, etc.). See Chapter3.5 "Technical data", page24
Operation Manual K-365 Kjel Line
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4 | Transport and storage
4 Transport and storage
4.1 Transport
4.2 Storage
Büchi Labortechnik AG
NOTICE
Risk of breakage due to incorrect transportation
Make sure that the instrument is fully dismantled.
Pack every instrument components properly to prevent breakage. Use the original
packaging whenever possible.
Avoid sharp movements during transit.
u After transporting, check the instrument and all glass components for damage.
u Damage that has occurred in transit should be reported to the carrier.
u Keep packaging for future transportation.
u Make sure that the ambient conditions are complied with (see Chapter3.5
"Technical data", page24).
u Wherever possible, store the device in its original packaging.
u After storage, check the device, all glass components, seals and tubing for
damage and replace if necessary.
4.3 Lifting the instrument
NOTICE
Dragging the instrument can damage the feet of the instrument.
u Lift the instrument when positioning or re-locating.
u Lift the instrument at the points indicated.
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
5 Installation
5.1 Before installation
5.2 Establishing electrical connections
Installation | 5
NOTICE
Instrument damage due to switching it on too early.
Switching on the instrument too early after transportation can cause damage.
u Climatize the instrument after transportation.
NOTICE
Risk of instrument damage because of not suitable power supply cables.
Not suitable power supply cables can cause bad performance or an instrument
damage
u Use only BUCHI power supply cables.
Precondition:
R The electrical installation is as specified on the
type plate.
R The electrical installation is equipped with a
proper grounding system.
R The electrical installation is equipped with
suitable fuses and electrical safety features.
R The installation site is as specified in the
technical date. See Chapter3.5 "Technical
data", page24
u Connect the power supply cable to the
connection on the instrument. See Chapter3.2
"Configuration", page14
u Connect the mains plug to an own mains outlet
socket.
5.3 Securing against earthquakes
The instrument has an earthquake fixing point to protect the device against falling.
u Tie the lashing mount to a fixed point using
strong cord or a wire.
Operation Manual K-365 Kjel Line
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5 | Installation
Büchi Labortechnik AG
5.4 Installing the cooling water supply
5.4.1 Installing a tap water supply (option)
Precondition:
R The tap water supply complies with the
specified parameters. See Chapter3.5
"Technical data", page24
R Make sure that the instrument is not
connected to the power supply.
u Install the inlet hose to the connection marked
Cooling Water / Chiller IN.
u Install the drain hose to the connection marked
OUT Cooling Water / Chiller.
u Put the other end of the hose in a sink.
5.4.2 Installing the recirculating chiller on the condenser (option)
NOTE
Place the hose in the rear cable duct.
Precondition:
R The water supply complies with the tap water
specifications. See Chapter3.5 "Technical
data", page24
u Make sure that the instrument is not connected
to the power supply.
u Remove the connection at the condenser inlet.
u Attach the cooling water hose from the chiller
to the condenser.
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
5.5 Installing the drain tubing (option)
Installation | 5
u Install the drain hose to the connection marked
OUT Cooling Water / Chiller on the rear of the
instrument.
u Make sure that the hoses are not bend.
u Install the drain hose to the connection marked
Drain.
u Place the other end of the hose in an aqueous
waste container located lower than the
instrument.
5.6 Installing the waste pump connection (BasicKjel, MultiKjel,
MultiKjel T only)
u Attach the waste hose onto the connection
marked Pump Receiving Vessel OUT.
u Secure the hose in place with a hose clip.
u Put the other end of the hose in a suitable
collection device.
Operation Manual K-365 Kjel Line
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5 | Installation
2
0
mm
Büchi Labortechnik AG
5.7 Installing the sample waste pump connection (MultiKjel T only)
u Attach the waste hose to the connection
marked Pump Sample Tube OUT.
u Secure the hose in place with a hose clip.
u Put the other end of the hose in a suitable
collection device.
5.8 Installing the H₂O supply for steam generation
NOTE
MultiKjel only
The water supply comes from one canister.
Precondition:
R The water complies with the specified
parameters. See Chapter3.5 "Technical data",
page24
R Make sure that the instrument is not
connected to the power supply.
u Install the inlet hose to the connection marked
H₂O Steam Gen. IN.
u Attach the inlet hose in place with a hose clip.
u Moist the aspiration hose.
u Push the hoses together.
u Attach the hose grommet to the canister lid.
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
2
0
mm
5.9 Installing NaOH supply (MultiKjel, MultiKjel T only)
Installation | 5
u Moist the hose.
u Insert the inlet hose through the opening of the
cap nut and the screw cap of the water tank.
u Submerse the inlet hose into the water.
u Install the inlet hose onto the connection
marked NaOH Sample Tube IN.
u Attach the inlet hose in place with a hose clip.
u Moist the aspiration hose.
u Push the hoses together.
u Attach the hose grommet to the canister lid.
u Submerse the inlet hose into the NaOH.
5.10 Installing H₃BO₃ supply (MultiKjel, MultiKjel T only)
u Install the inlet hose to the connection marked
H₃BO₃ Receiving Vessel IN.
u Attach the inlet hose in place with a hose clip.
Operation Manual K-365 Kjel Line
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5 | Installation
2
0
mm
2
0
mm
Büchi Labortechnik AG
u Moist the aspiration hose.
u Push the hoses together.
u Attach the hose grommet to the canister lid.
u Submerse the inlet hose into the H₃BO₃.
5.11 Installing the H₂O supply for the sample tube (MultiKjel,
MultiKjel T only)
NOTE
MultiKjel only
The water supply comes from one canister.
u Install the inlet hose to the connection marked
H₂O Sample Tube IN.
u Attach the inlet hose in place with a hose clip.
u Moist the aspiration hose.
u Push the hoses together.
34/106
u Attach the hose grommet to the canister lid.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
5.12 Installing the level sensor on the canister (option)
Installation | 5
u Submerse the inlet hose into the H₂O.
NOTE
Do not expose the tank level sensor to an electromagnetic field in the frequency
range of 2 to 10 MHz.
u Attach the hook-and-loop fastener sticker to
the sensor.
u Attach the strap to the canister.
u Fix the sensor on the canister.
u Connect the sensor cable to the related
connection on the instrument. See Chapter3.2
"Configuration", page14
5.13 Installing a titrator with LAN (MultiKjel T with Eco Titrator only)
Settings
NOTE
Make sure, that the IP on both instruments is 192.168.10.3
Operation Manual K-365 Kjel Line
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5 | Installation
Peripherals
Titrator Model
...
Titrator Model
EDIT
...
...
...
...
SAVE
Peripherals
Titrator Model
...
Titrator Model
EDIT
Büchi Labortechnik AG
u Connect the LAN cable to the related
connection on the instrument. See Chapter3.2
"Configuration", page14
Specifications on the display:
Precondition:
R The titrator is prepared. See related manual
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the titrator model you wish to use.
u Tap the specified function on the function bar.
ð The titrator model is saved.
5.14 Installing a titrator with RS232 (MultiKjel only)
Precondition:
R The dosing unit is prepared. See related
documentation
u Attach the plug onto the connection marked
Titrator (RS-232).
u Secure the plug in place.
Specifications on the display:
Precondition:
R The titrator is prepared. See related manual
36/106
R The instrument is connected to the LAN
network.
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
...
...
...
...
SAVE
5.15 Installing a dispenser (MultiKjel T only)
Installation | 5
Specifications on the display:
u Select the titrator model you wish to use.
u Tap the specified function on the function bar.
ð The titrator model is saved.
Precondition:
R The dosing unit is prepared. See related
Documentation
u Attach the plug onto the connection marked
Dosing Unit.
u Secure the plug in place.
5.16 Installing the reaction detection sensor (MultiKjel T only)
u Attach the reaction detection sensor to the
instrument.
u Connect the sensor cable to the related
connection on the instrument. See Chapter3.2
"Configuration", page14
5.17 Installing a SD card (Interface pro only)
u Insert the SD card.
u Restart the instrument.
ð The status bar shows the SD card symbol.
5.18 Installing the level detection sensor (option)
Operation Manual K-365 Kjel Line
NOTE
Using the level detection sensor. See Chapter8.11 "Preparing the level detection
sensor (option)", page74
37/106
5 | Installation
Büchi Labortechnik AG
u Attach the metal plate to the magnetic area of
the instrument.
u Push the cable through the rear cable duct.
u Connect the sensor cable to the related
connection on the instrument. See Chapter3.2
"Configuration", page14
5.19 Installing the stirrer (MultiKjel only)
u Attach the stirrer to the receiving vessel.
u Push the cable through the rear cable duct.
u Connect the sensor cable to the related
connection on the instrument. See Chapter3.2
"Configuration", page14
38/106
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
1
2
7
6
5
3
4
6 Description of the interface
6.1 Layout of the interface
Description of the interface | 6
Fig.16: Interface
No. Description Function
1 Status bar Shows the determination name and status of the
instrument.
See Chapter6.4 "Status bar interface", page43
2 Menu bar Shows symbols representing the menus.
See Chapter6.3 "Menu bar interface", page40
3 Content area Shows current settings, submenus or actions de-
pending on the current operation.
4 Function bar Shows functions that can be performed according
to the current operation.
See Chapter6.2 "Function bar interface",
page40
5 Function buttons Pressing a function button performs the assigned
function on the function bar.
6 Stop button
7 Navigation control Used for navigating the user interface.
Using the navigation control
Operation Manual K-365 Kjel Line
u Select an entry.
u Confirm the selected entry.
39/106
6 | Description of the interface
OK
START
COPY
EDIT
READY
PREP
DELETE
DEL ALL
STANDBY
6.2 Function bar interface
The function bar shows available functions according to the current operation.
The functions on the function bar are executed by tapping the relevant function
buttons.
Symbol Description Meaning
Büchi Labortechnik AG
[Back] The display reverts to the previous
view.
[Confirm] Confirms an entry.
[Start] Starts an extraction process.
[Copy] Copies the selected method.
[Edit] Allows the selected item to be
edited.
[Ready] Steam generator is ready to distill.
[Preparation] Carries out the method selected in
the [Priming] submenu. See Chapter8.2 "Editing the priming function", page52
[Template] Saves the selected series as a tem-
[Delete] Deletes the selected entry.
[Delete all] Deletes all entries.
[Standby] The steam generator changes to
6.3 Menu bar interface
Menu symbol Name Explanation
Hom e
Man ual con trol
menu
Pro cess
menu
menu
plate.
Creates a series from the selected
template.
standby mode.
Process control parameters
Start various processes manually
Editing and saving:
40/106
◦ Methods
◦ Series
◦ Templates
◦ Determinations
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Description of the interface | 6
Menu symbol Name Explanation
Con figu rat ion
menu
Det ermi nat ion
menu
dat a
6.3.1 Home menu
6.3.2 Manual control menu
The manual control menu contains the following submenus:
Submenu Explanation
Dose manually See Chapter8.13 "Dosing manually", page74
Aspirate manually See Chapter8.14 "Aspirating manually", page75
[Preheating] See Chapter8.1 "Editing the preheating function", page52
[Priming] See Chapter8.2 "Editing the priming function", page52
[Cleaning] See Chapter10.3 "Cleaning the glass components", page83
[Stirring] See Chapter8.15 "Changing the stirring speed manually",
page76
Change settings
Service menu
System information
View processed determinations
[Pump Calibration] See Chapter10.14 "Calibrating the pumps", page85
6.3.3 Method menu
The method menu contains the following submenus:
Submenu Explanation
[Single Determination] See Chapter8.3 "Editing the single determina-
[Series] See Chapter8.4 "Editing a series", page55
[Templates] See Chapter8.5 "Editing a template", page59
[Methods] See Chapter8.6 "Editing a method", page60
6.3.4 Configuration menu
Settings submenu
Action Option Explanation
[Language] Choice of display lan-
guage on the interface
tion", page52
The following languages are available:
English/German/French/Italian/
Spanish/Japanese/Chinese/Russian/
Polish
[Current Date] Date input Enter in sequence: Day, month, year.
Operation Manual K-365 Kjel Line
Apply the settings by pressing [Save].
41/106
6 | Description of the interface
Action Option Explanation
[Current Time] Time input Enter in sequence: Minutes, hours.
Time zone Choice of time zone Select your time zone
Büchi Labortechnik AG
Apply the settings by pressing [Save].
[Keyboard Layout] Choice of display key-
Select the keyboard layout
board on the interface
[Key Tones] Off/On Setting for audible signal in response
to input controls.
[Beep on Finish] Off/On Setting for audible signal by the end
of a determination.
[Beep on Error] Off/On Setting for audible signal by the end
of a determination.
[Display Brightness] Enter setting Display illumination level in %: 0 -
100
[Zero Amount Warning]
[Default Amount
Unit]
[MaxAccuracy
Mode]
On/Off The instrument gives a warning when
the entry for the weight is zero.
Select value The following values are selectable:
g, mL
On / Off Compensation of the steam power
caused by voltage fluctuations.
[AutoDist Mode] On/Off Conditioning and distillation are per-
formed automatically.
[Level Detect. Max.
Time]
[Pump Maintenance
Interval]
[H₂O Dosage per
Keypress]
[Acid Dosage per
Keypress]
[NaOH Dosage per
Keypress]
[Aspiration Time Receiver]
[Aspiration Time
Sample Tube]
[H₃BO₃ Dosage per
Keypress]
Enter value The time after which the distillation
stops without level detection sensor
triggering.
Select value Selecting a frequency to carry out a
pump rinsing.
See Chapter10.20 "Rinsing a pump",
page90
Enter value Dosage volume which is applied by
pressing the related button.
Enter value Dosage volume which is applied by
pressing the related button.
Enter value Dosage volume which is applied by
pressing the related button.
Select value Aspiration time for the related but-
ton.
Select value Aspiration time for the related but-
ton.
Enter value Dosage volume which is applied by
pressing the related button.
42/106
[Steam Generator
Standby]
Enter value Enter the time until the instrument
turns automatically into standby.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Description of the interface | 6
Action Option Explanation
[Demo Mode] On/Off Simulate a distillation.
[Service Data Logger]
On/Off Saves all data on the instrument for
14 months.
Peripherals submenu
Shows information about the connected peripherals.
Users submenu
Creating and setting users. See Chapter8.7 "Editing user setting", page71
Network submenu
Action Option Explanation
[Network] Enter value The following parameters can be
edited:
Device name/MAC address/DHCP/
System IP address/Subnet mask/
Gateway/DNS server/BUCHI Cloud/
Server IP address
Service submenu
NOTE
Only super user can carry out changes in the [Service] submenu.
System Information submenu
Technical information about the connected devices (e.g. serial number, firmware
version).
6.3.5 Determination data menu
Shows the history of the determination data.
6.4 Status bar interface
The status bar shows actual information about the instrument.
View Status
The instrument is in standby mode.
Process is running.
The instrument is heating up.
The BLE dongle is connected to the instrument.
Operation Manual K-365 Kjel Line
A level detection sensor is connected to the instrument.
Reaction detection sensor attached.
43/106
6 | Description of the interface
SD
USB
View Status
Büchi Labortechnik AG
A tank level sensor is connected to the instrument.
Dosing unit attached.
Titration unit attached.
White: A SD card is in the instrument.
Red: The SD card in the instrument is in read only
mode.
A USB input device is connected.
A USB memory stick is connected to the instrument.
A recirculating chiller is connected.
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
1
3
6
5
4
2
7 Description of the interface pro
7.1 Layout of the interface pro
Description of the interface pro | 7
CAUTION
Risk of injury from glass splinters
Sharp objects can damage the display.
u Keep sharp objects away from the display.
Operation Manual K-365 Kjel Line
Fig.17: Interface pro
No. Description Function
1 Status bar Shows the determination name and status of
the instrument.
See Chapter7.4 "Status bar interface pro",
page50
2 Menu bar Shows symbols representing the menus.
3 Content area Shows current settings, submenus or actions
depending on the current operation.
4 Function bar Shows functions that can be performed ac-
cording to the current operation.
5 Stop button
6 Navigation control Used for navigating the user interface.
45/106
7 | Description of the interface pro
OK
START
COPY
EDIT
READY
PREP
DELETE
DEL ALL
STANDBY
Using the navigation control
u Select an entry.
u Confirm the selected entry.
7.2 Function bar interface pro
The function bar shows available functions according to the current operation.
The functions on the function bar are executed by tapping the relevant function
buttons.
Symbol Description Meaning
Büchi Labortechnik AG
[Back] The display reverts to the previous
view.
[Confirm] Confirms an entry.
[Start] Starts an extraction process.
[Copy] Copies the selected method.
[Edit] Allows the selected item to be
edited.
[Ready] Steam generator is ready to distill.
[Preparation] Carries out the method selected in
the [Priming] submenu. See Chapter8.2 "Editing the priming function", page52
[Template] Saves the selected series as a tem-
plate.
Creates a series from the selected
template.
[Delete] Deletes the selected entry.
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[Delete all] Deletes all entries.
[Standby] The steam generator changes to
standby mode.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
1
2
3
5
4
7.3 Menu bar interface pro
Description of the interface pro | 7
Menu
symbol
Name Explanation
Hom e
Man ual con trol
menu
Process control parameters
Start various processes manually
menu
Pro cess
menu
Editing and saving:
◦ Methods
◦ Series
◦ Templates
◦ Determinations
Con figu rat ion
menu
Change settings
Service menu
System information
Det ermi nat ion
dat a
menu
View processed determinations
7.3.1 Home menu
Fig.18: Home menu during a determination
1 Select and shows operation mode 2 Preview of next determination
3 Short-cut to determination data of
the running determination
5 Remaining time
4 Status of the determination (incl. cor-
responding icons)
Operation Manual K-365 Kjel Line
7.3.2 Manual control menu
The manual control menu contains the following submenus:
Submenu Explanation
Dose manually See Chapter8.13 "Dosing manually", page74
Aspirate manually See Chapter8.14 "Aspirating manually", page75
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7 | Description of the interface pro
Submenu Explanation
[Preheating] See Chapter8.1 "Editing the preheating function", page52
[Priming] See Chapter8.2 "Editing the priming function", page52
[Cleaning] See Chapter10.3 "Cleaning the glass components", page83
[Stirring] See Chapter8.15 "Changing the stirring speed manually",
[Pump Calibration] See Chapter10.14 "Calibrating the pumps", page85
7.3.3 Method menu
The method menu contains the following submenus:
Submenu Explanation
[Single Determination] See Chapter8.3 "Editing the single determina-
[Series] See Chapter8.4 "Editing a series", page55
[Templates] See Chapter8.5 "Editing a template", page59
[Methods] See Chapter8.6 "Editing a method", page60
Büchi Labortechnik AG
page76
tion", page52
7.3.4 Configuration menu
Settings submenu
Action Option Explanation
[Language] Choice of display lan-
guage on the interface
[Current Date] Date input Enter in sequence: Day, month, year.
[Current Time] Time input Enter in sequence: Minutes, hours.
Time zone Choice of time zone Select your time zone
[Keyboard Layout] Choice of display key-
board on the interface
[Key Tones] Off/On Setting for audible signal in response
The following languages are available:
English/German/French/Italian/
Spanish/Japanese/Chinese/Russian/
Polish
Apply the settings by pressing [Save].
Apply the settings by pressing [Save].
Select the keyboard layout
to input controls.
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[Beep on Finish] Off/On Setting for audible signal by the end
of a determination.
[Beep on Error] Off/On Setting for audible signal by the end
of a determination.
[Display Brightness] Enter setting Display illumination level in %: 0 -
100
[Zero Amount Warning]
On/Off The instrument gives a warning when
the entry for the weight is zero.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Description of the interface pro | 7
Action Option Explanation
[Default Amount
Unit]
[MaxAccuracy
Mode]
Select value The following values are selectable:
g, mL
On / Off Compensation of the steam power
caused by voltage fluctuations.
[AutoDist Mode] On/Off Conditioning and distillation are per-
formed automatically.
[Level Detect. Max.
Time]
Enter value The time after which the distillation
stops without level detection sensor
triggering.
[Pump Maintenance
Interval]
Select value Selecting a frequency to carry out a
pump rinsing.
See Chapter10.20 "Rinsing a pump",
page90
[H₂O Dosage per
Keypress]
[NaOH Dosage per
Keypress]
[Acid Dosage per
Keypress]
Enter value Dosage volume which is applied by
pressing the related button.
Enter value Dosage volume which is applied by
pressing the related button.
Enter value Dosage volume which is applied by
pressing the related button.
[H₃BO₃ Dosage per
Keypress]
[Aspiration Time Receiver]
[Aspiration Time
Sample Tube]
[Steam Generator
Standby]
Enter value Dosage volume which is applied by
pressing the related button.
Select value Aspiration time for the related but-
ton.
Select value Aspiration time for the related but-
ton.
Enter value Enter the time until the instrument
turns automatically into standby.
[Demo Mode] On/Off Simulate a distillation.
[Service Data Logger]
On/Off Saves all data on the instrument for
14 months.
[Export Device] Select value Select between the following data
export devices:
USB stick/SD card
Peripherals submenu
Shows information about the connected peripherals.
User administration submenu
Creating and setting users. See Chapter8.7 "Editing user setting", page71
Operation Manual K-365 Kjel Line
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7 | Description of the interface pro
SD
USB
Network submenu
Action Option Explanation
[Network] Enter value The following parameters can be
Service submenu
NOTE
Only super user can carry out changes in the [Service] submenu.
System Information submenu
Technical information about the connected devices (e.g. serial number, firmware
version).
Büchi Labortechnik AG
edited:
Device name/DHCP/MAC address/
System IP address/Subnet mask/
Gateway
7.3.5 Determination data menu
Shows the history of the determination data.
7.4 Status bar interface pro
The status bar shows actual information about the instrument.
View Status
The instrument is in standby mode.
Process is running.
The instrument is heating up.
The BLE dongle is connected to the instrument.
A level detection sensor is connected to the instrument.
Reaction detection sensor attached.
A tank level sensor is connected to the instrument.
Dosing unit attached.
50/106
Titration unit attached.
White: A SD card is in the instrument.
Red: The SD card in the instrument is in read only
mode.
A USB input device is connected.
A USB memory stick is connected to the instrument.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Description of the interface pro | 7
View Status
A recirculating chiller is connected.
Operation Manual K-365 Kjel Line
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8 | Preparations for a determination
Preheating
......
EDIT
...
SAVE
Priming
...
...
...
...
Single Determination
8 Preparations for a determination
8.1 Editing the preheating function
The preheating function defines how long the instrument parts are conditioned with
steam.
u Navigate to the specified submenu.
u Select the preheating function for which you
want to change the preheating time.
u Tap the specified function on the function bar.
u Enter the preheating time in seconds.
Büchi Labortechnik AG
Specifications on the display:
u Tap the specified function on the function bar.
ð The time is saved.
8.2 Editing the priming function
NOTE
The method selected in this submenu is used for preparation.
Specifications on the display:
u Navigate to the specified submenu.
u Select the method you wish to use.
ð The priming method is selected.
8.3 Editing the single determination
8.3.1 Changing the name of the single determination
52/106
NOTE
The name of the single determination is displayed in the [Determination data]
menu.
Specifications on the display:
u Navigate to the specified submenu.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
...
Determination Name
EDIT
...
SAVE
Single Determination
...
Type
SAVE
...
...
...
...
SAVE
Single Determination
...
Method Name
EDIT
...
...
...
...
8.3.2 Selecting the determination type for a single determination
Preparations for a determination | 8
Specifications on the display:
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the name for the single determination.
u Tap the specified function on the function bar.
ð The name for the determination is saved.
The following determination types are selectable:
Determination type Explanation
[Blank] For determinations without sample.
[Reference Substance] For determinations with a defined reference sub-
stance.
[Sample] For determinations with unknown sample.
Specifications on the display:
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the determination type you wish to use.
ð The determination type is selected.
u Tap the specified function on the function bar.
8.3.3 Selecting the method for a single determination
Specifications on the display:
u Navigate to the specified submenu.
Operation Manual K-365 Kjel Line
u Select the specified action.
u Tap the specified function on the function bar.
u Select the method you wish to use.
ð The method is selected.
53/106
8 | Preparations for a determination
SAVE
Single Determination
...
EDIT
...
SAVE
Single Determination
...
Unit
EDIT
...
...
...
...
SAVE
u Tap the specified function on the function bar.
8.3.4 Changing the sample quantity for single determination
Precondition:
R The determination type is set to [Sample]. See
Chapter8.3.2 "Selecting the determination
type for a single determination", page53
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a value for the sample weight.
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Tap the specified function on the function bar.
ð The sample weight is saved.
8.3.5 Changing the unit for a single determination
The following units are available:
Unit Explanation
[g] Enter the weight for the determination in gram.
[ml] Enter the weight for the determination in mL.
Specifications on the display:
Precondition:
R The determination type is set to [Sample] or
[Reference Substance]. See Chapter8.3.2
"Selecting the determination type for a single
determination", page53
u Navigate to the specified submenu.
u Select the specified action.
54/106
u Tap the specified function on the function bar.
u Select the unit you wish to use.
ð The unit is saved.
u Tap the specified function on the function bar.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Series
NEW
Templates
...
Series
...
...
Series Name
EDIT
...
SAVE
8.4 Editing a series
8.4.1 Creating a new series
Preparations for a determination | 8
There are two possibilities to create new series:
Chapter "Creating a new series", page55
Chapter "Creating a new series from a template", page55
Creating a new series
Specifications on the display:
u Navigate to the specified submenu.
u Tap the specified function on the function bar.
ð The new series is created.
Creating a new series from a template
u Navigate to the specified submenu.
u Select the template from which you want to
create a series.
u Tap the specified function on the function bar.
ð The series is created.
8.4.2 Changing the name of a series
u Navigate to the specified submenu.
u Select the name of the series that you wish to
edit.
Specifications on the display:
Specifications on the display:
Operation Manual K-365 Kjel Line
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a name for the series.
u Tap the specified function on the function bar.
ð The name is saved.
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8 | Preparations for a determination
Series
...
NEW
Series
...
...
COPY
Series
...
...
DELETE
Series
8.4.3 Adding a determination to a series
Add the first determination to a series
u Navigate to the specified submenu.
u Select the series you wish to edit.
u Tap the specified function on the function bar.
ð The determination is created.
Add more determinations to a series by copy existing
u Navigate to the specified submenu.
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Select the series you wish to edit.
u Select the determination you wish to copy.
u Tap the specified function on the function bar.
ð The determination is created.
8.4.4 Deleting a determination from a series
u Navigate to the specified submenu.
u Select the series you wish to edit.
u Select the determination you wish to delete.
u Tap the specified function on the function bar.
ð The determination is deleted.
Specifications on the display:
56/106
8.4.5 Changing the determination name for a series
Specifications on the display:
u Navigate to the specified submenu.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
...
...
...
Determination Name
EDIT
...
SAVE
Series
...
...
...
Type
EDIT
...
...
...
...
SAVE
8.4.6 Selecting the determination type within a series
Preparations for a determination | 8
Specifications on the display:
u Select the series you wish to edit.
u Select the determination you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the name for the single determination.
u Tap the specified function on the function bar.
ð The name for the determination is saved.
The following determination types are selectable:
Determination type Explanation
[Blank] For determinations without sample.
[Reference Substance] For determinations with a defined reference sub-
stance.
[Sample] For determinations with unknown sample.
Specifications on the display:
u Navigate to the specified submenu.
u Select the series you wish to edit.
u Select the determination you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the determination type you wish to use.
ð The determination type is selected.
Operation Manual K-365 Kjel Line
u Tap the specified function on the function bar.
ð The name for the determination is saved.
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8 | Preparations for a determination
Series
...
...
...
Method Name
EDIT
...
...
...
...
SAVE
Series
...
...
...
EDIT
...
SAVE
8.4.7 Selecting the method for a determination within a series
u Navigate to the specified submenu.
u Select the series you wish to edit.
u Select the determination you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the determination type you wish to use.
ð The determination type is selected.
u Tap the specified function on the function bar.
Büchi Labortechnik AG
Specifications on the display:
8.4.8 Changing the sample quantity for determination within a series
Specifications on the display:
Precondition:
R The determination type is set to [Sample] or
[Reference Substance]. See Chapter8.4.6
"Selecting the determination type within a
series", page57
u Navigate to the specified submenu.
u Select the series you wish to edit.
u Select the determination you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a value for the sample weight.
u Tap the specified function on the function bar.
ð The value for the sample weight is saved.
58/106
8.4.9 Changing the amount unit for a determination within a series
The following units are available:
Unit Explanation
[g] Enter the weight for the determination in gram. Chapter8.3.4 "Chang-
ing the sample quantity for single determination", page54
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Series
...
...
...
Unit
EDIT
...
...
...
...
SAVE
Series
...
Preparations for a determination | 8
Unit Explanation
[ml] Enter the weight for the determination in mL. See Chapter8.3.4
"Changing the sample quantity for single determination", page54
Specifications on the display:
Precondition:
R The determination type is set to [Sample] or
[Reference Substance]. See Chapter8.4.6
"Selecting the determination type within a
series", page57
u Navigate to the specified submenu.
u Select the series you wish to edit.
u Select the determination you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the determination type you wish to use.
ð The determination type is selected.
u Tap the specified function on the function bar.
8.5 Editing a template
8.5.1 Creating a new template
There are two possibilities to create a template:
Chapter "Creating a new template", page60
Chapter "Creating a new template from an existing series", page59
Creating a new template from an existing series
u Navigate to the specified submenu.
Specifications on the display:
Operation Manual K-365 Kjel Line
u Select the series from which you want to create
a template.
u Tap the specified function on the function bar.
ð The template is created.
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8 | Preparations for a determination
Templates
NEW
Templates
...
...
Template Name
EDIT
...
SAVE
Methods
...
COPY
Creating a new template
u Navigate to the specified submenu.
u Tap the specified function on the function bar.
ð The template is created.
8.5.2 Changing the name of a template
u Navigate to the specified submenu.
u Select the name of the template that you wish
to edit.
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a name for the template.
u Tap the specified function on the function bar.
ð The template name is saved.
8.6 Editing a method
8.6.1 Creating a new method
u Navigate to the specified submenu.
u Select a method you wish to copy.
Specifications on the display:
60/106
u Tap the [Copy] function on the function bar.
ð A new method is created.
8.6.2 Deleting a method
NOTE
Default methods [Priming Method] and [Standard Method] cannot be deleted.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Methods
...
DELETE
Methods
...
...
Method Name
EDIT
...
SAVE
Methods
8.6.3 Changing the name of a method
Preparations for a determination | 8
Specifications on the display:
u Navigate to the specified submenu.
u Select a method you wish to delete.
u Tap the specified function on the function bar.
u Confirm the secure question.
ð The method is deleted.
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a name for the method.
u Tap the specified function on the function bar.
ð The name is saved.
8.6.4 Changing the reaction detection for a method (option for MultiKjel
only)
The reaction detection sensor monitors the alkalization and doses the NaOH
accordingly. The instrument switches automatically off when the alkalization is
completed.
Status Explanation
On Automatic alkalization during the determination.
Operation Manual K-365 Kjel Line
Off Enter the parameters for the alkalization manually.
Specifications on the display:
u Navigate to the specified submenu.
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8 | Preparations for a determination
...
Reaction Detection
EDIT
Methods
...
...
H₂O Volume
EDIT
...
SAVE
Methods
...
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
ð The status is changed.
8.6.5 Changing the H₂O volume for a method (MultiKjel only)
NOTE
The [Reaction Detection] action is set to Off. See Chapter8.6.4 "Changing the
reaction detection for a method (option for MultiKjel only)", page61
Manually entering the quantity of H₂O to dilute the sample.
The input values can be found in the corresponding "Application note ".
u Navigate to the specified submenu.
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the volume quantity.
u Tap the specified function on the function bar.
ð The quantity for the dosing is saved.
8.6.6 Changing the H₂SO₄ volume for a method (MultiKjel only)
NOTE
The [Reaction Detection] action is set to On. See Chapter8.6.4 "Changing the
reaction detection for a method (option for MultiKjel only)", page61
Enter manually the quantity of sulfuric acid.
The value is known from the previous digestion process.
Specifications on the display:
62/106
u Navigate to the specified submenu.
u Select the method that you wish to edit.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
...
H₂SO₄ for Digest.
EDIT
...
SAVE
Methods
...
...
NaOH Volume
EDIT
...
SAVE
Methods
...
8.6.7 Changing the NaOH volume for a method (MultiKjel only)
Preparations for a determination | 8
Specifications on the display:
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the quantity of the sulfuric acid.
u Tap the specified function on the function bar.
ð The quantity for the sulfuric acid is saved.
NOTE
The [Reaction Detection] action is set to Off. See Chapter8.6.4 "Changing the
reaction detection for a method (option for MultiKjel only)", page61
Enter manually the quantity of NaOH for alkalizing the sample.
For the correct quantity check related "Application note " or use the KjelOptimizer
App.
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the quantity for the dosing.
u Tap the specified function on the function bar.
ð The quantity for the dosing is saved.
8.6.8 Changing the acid volume for a method (BasicKjel, MultiKjel only)
Enter manually the quantity of reagent to be dosed.
Operation Manual K-365 Kjel Line
u Navigate to the specified submenu.
u Select the method that you wish to edit.
Specifications on the display:
63/106
8 | Preparations for a determination
...
Acid Volume
EDIT
...
SAVE
Methods
...
...
Reaction Time
EDIT
...
SAVE
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the quantity for the dosing.
u Tap the specified function on the function bar.
ð The quantity for the dosing is saved.
8.6.9 Changing the reaction time for a method (BasicKjel, MultiKjel only)
NOTE
The [Reaction Detection] action is set to Off. See Chapter8.6.4 "Changing the
reaction detection for a method (option for MultiKjel only)", page61
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a value for the reaction time.
u Tap the specified function on the function bar.
ð The reaction time is saved.
8.6.10 Changing the number of steam steps for a method
Select steps to get the steam power gradually.
Selection Explanation
64/106
[None] Steam power in % selectable. See Chapter8.6.12 "Changing the steam
power for a method", page66
[2] Steam power in % selectable. See Chapter8.6.12 "Changing the steam
power for a method", page66
Duration time of the steam step selectable. See Chapter8.6.11 "Changing the time a steam step is carried out for a method", page65
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Methods
...
...
Steam Steps
EDIT
...
...
...
...
SAVE
Methods
...
...
Calibration NaOH
Preparations for a determination | 8
Selection Explanation
[3] Steam power in % selectable. See Chapter8.6.12 "Changing the steam
power for a method", page66 and
Duration time of the steam step selectable. See Chapter8.6.11 "Changing the time a steam step is carried out for a method", page65
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the number of steps you wish to use.
u Tap the specified function on the function bar.
8.6.11 Changing the time a steam step is carried out for a method
NOTE
Calculating the starting time for a steam step
R Make sure that the distillation time is set longer than the calculated time for the
steam steps. See Chapter8.6.14 "Changing the distillation time for a method",
page67
u Starting time for steam step two:
ð The duration time of the first steam step.
u Starting time for steam step three:
ð The duration time of the first steam step.
ð +
ð The duration time of the second steam step.
Specifications on the display:
Operation Manual K-365 Kjel Line
Precondition:
R More than one steam step is selected. See
Chapter8.6.10 "Changing the number of
steam steps for a method", page64
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
65/106
8 | Preparations for a determination
EDIT
...
SAVE
Methods
...
...
Steam Power
EDIT
...
SAVE
Methods
...
u Tap the specified function on the function bar.
u Enter the time for the steam step.
u Tap the specified function on the function bar.
ð The time for the steam step is saved.
8.6.12 Changing the steam power for a method
The steam power in % during a steam step.
u Navigate to the specified submenu.
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the level for the steam power.
u Tap the specified function on the function bar.
ð The level for the steam power is saved.
8.6.13 Changing the level detection sensor settings (option) for a method
The level detection stops the distillation when a defined distillate volume is reached.
NOTE
The maximum level detection time can be changed in the
Selection Explanation
On The level detection sensor is active.
Set ting s
submenu.
66/106
Off The level detection sensor is off.
u Navigate to the specified submenu.
u Select the method that you wish to edit.
Specifications on the display:
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Level Detection
EDIT
Methods
...
...
Distillation Time
EDIT
...
SAVE
Methods
...
...
Stirrer Speed Dist.
EDIT
...
SAVE
8.6.14 Changing the distillation time for a method
Preparations for a determination | 8
Specifications on the display:
u Select the specified action.
u Tap the specified function on the function bar.
ð The status changed.
Enter manually the time for the determination.
Specifications on the display:
Precondition:
R The [Level Detection] action is set to Off. See
Chapter8.6.13 "Changing the level detection
sensor settings (option) for a method",
page66
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a value for the distillation time.
u Tap the specified function on the function bar.
ð The distillation time is saved.
8.6.15 Changing the distillation stirring speed for a method (MultiKjel T only)
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
Operation Manual K-365 Kjel Line
u Tap the specified function on the function bar.
u Enter the stirring speed.
u Tap the specified function on the function bar.
ð The stirring speed is saved.
67/106
8 | Preparations for a determination
Methods
...
...
Titration Type
EDIT
...
...
...
...
SAVE
Methods
...
...
H₃BO₃ Volume
EDIT
...
SAVE
8.6.16 Changing the titration type for a method (MultiKjel T only)
Titration type Explanation
[None] No titration
[Boric Acid Titration] Titration
[Back Titration] Back titration
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
Büchi Labortechnik AG
Specifications on the display:
u Select the titration type you wish to use.
u Tap the specified function on the function bar.
8.6.17 Changing the H₃BO₃ volume for a method (MultiKjel only)
NOTE
The availability depends on the selected titration type.
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
68/106
u Enter the quantity for the volume.
u Tap the specified function on the function bar.
ð The volume is saved.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Methods
...
...
Dosing Unit Vol.
EDIT
...
SAVE
Methods
...
...
Stirrer Speed Titr.
EDIT
...
SAVE
8.6.18 Changing the dosing unit volume for a method (MultiKjel T only)
Preparations for a determination | 8
NOTE
The availability depends on the selected titration type.
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the quantity for the volume.
u Tap the specified function on the function bar.
ð The volume is saved.
8.6.19 Changing the titration stirring speed for a method (MultiKjel T only)
NOTE
The availability depends on the selected titration type.
Specifications on the display:
Precondition:
R A titration type is activated. See
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the stirring speed.
8.6.20 Changing the titration start time for a method (MultiKjel T only)
Operation Manual K-365 Kjel Line
u Tap the specified function on the function bar.
ð The stirring speed is saved.
NOTE
The availability depends on the selected titration type.
69/106
8 | Preparations for a determination
Methods
...
...
Titration Start Time
EDIT
...
SAVE
Methods
...
...
Sample Tube Aspiration
EDIT
...
SAVE
Methods
...
...
Receiver Aspiration
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a value for the titration start time.
u Tap the specified function on the function bar.
ð The start time is saved.
8.6.21 Changing the aspiration time for the sample tube for a method
(BasicKjel, MultiKjel, MultiKjel T only)
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter a value for the aspiration time.
u Tap the specified function on the function bar.
ð The aspiration time is saved.
8.6.22 Changing the aspiration time for the receiving vessel for a method
(MultiKjel T only)
Specifications on the display:
70/106
u Navigate to the specified submenu.
u Select the method that you wish to edit.
u Select the specified action.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
EDIT
...
SAVE
User Administration
NEW
...
SAVE
User Administration
......
DELETE
8.7 Editing user setting
8.7.1 Creating a new user
Preparations for a determination | 8
Specifications on the display:
u Tap the specified function on the function bar.
u Enter a value for the aspiration time.
u Tap the specified function on the function bar.
ð The aspiration time is saved.
NOTE
The user [Service User] is a default user and password protected.
Specifications on the display:
u Navigate to the specified submenu.
u Tap the specified function on the function bar.
u Enter a name for the user.
u Tap the specified function on the function bar.
8.7.2 Deleting a user
u Navigate to the specified submenu.
u Select the user you wish to delete.
u Tap the specified function on the function bar.
u Confirm the secure question.
ð The user is deleted.
Specifications on the display:
Operation Manual K-365 Kjel Line
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8 | Preparations for a determination
User Administration
......
EDIT
...
SAVE
User Administration
......
SET
8.7.3 Changing the name of a user
u Navigate to the specified submenu.
u Select the user that you wish to edit.
u Tap the specified function on the function bar.
u Enter a new name for the user.
u Tap the specified function on the function bar.
ð The new name is saved.
8.7.4 Selecting a user
Büchi Labortechnik AG
Specifications on the display:
u Navigate to the specified submenu.
u Select the user you wish to use.
u Tap the specified function on the function bar.
ð The user is active.
ð The user is marked up green.
8.8 Installing the sample tube
NOTE
Removing is done in reverse sequence.
Precondition:
R Make sure, that the end stop is in the correct
position for the sample tube in use. See
Chapter8.10 "Preparing the end stop for the
sample tube size", page73
Specifications on the display:
72/106
u Hold the sample tube with the tongs.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Preparations for a determination | 8
u Insert the sample tube.
u Apply a light force to push the sample tube
against the end stop and the sample tube
sealing.
u Secure the sample tube in place with the
handle.
8.9 Installing a receiving vessel
u Insert the sample receiving vessel to the
instrument.
u Place the sample receiving vessel on the
receiving vessel area.
8.10 Preparing the end stop for the sample tube size
u Pull the end stop.
u Twist the end stop.
Operation Manual K-365 Kjel Line
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8 | Preparations for a determination
1
0
mm
...
Operation Mode
EDIT
...
...
...
...
SAVE
8.11 Preparing the level detection sensor (option)
Precondition:
R The installations for the level sensor are
completed. See Chapter5.18 "Installing the
level detection sensor (option)", page37
u Attach the magnetic level sensor to the metal
plate.
u Adjust the sensor near the sample receiving
vessel.
Büchi Labortechnik AG
8.12 Selecting the operation mode
Select one of the following operation modes:
Operation mode Explanation
[Single Determination] For carrying out one determination. Editing settings see
Chapter8.3 "Editing the single determination", page52
[Series] For planning and carrying out a series of determinations.
Editing settings see Chapter8.4 "Editing a series", page55
u Navigate to the specified menu.
u Select the specified action.
u Tap the specified function on the function bar.
u Select the operation mode according to your
requirements.
u Tap the specified function on the function bar.
Specifications on the display:
74/106
8.13 Dosing manually
8.13.1 Dosing H₂O manually
NOTE
The quantity of liquid per keystroke can be changed in the [Settings] submenu.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
H₂O
NaOH
H₃BO₃
8.13.2 Dosing NaOH manually
Preparations for a determination | 8
Specifications on the display:
Precondition:
R A sample tube is installed. See Chapter8.8
"Installing the sample tube", page72
u Navigate to the specified menu.
u Tap the specified button.
ð The pump applies a defined quantity of H₂O.
NOTE
The quantity of liquid per keystroke can be changed in the [Settings] submenu.
Specifications on the display:
Precondition:
R A sample tube is installed. See Chapter8.8
"Installing the sample tube", page72
u Navigate to the specified menu.
u Tap the specified button.
ð The pump applies a defined quantity of NaOH.
8.13.3 Dosing H₃BO₃ manually
NOTE
The quantity of liquid per keystroke can be changed in the [Settings] submenu.
Precondition:
R A receiving vessel is installed. See Chapter8.9
"Installing a receiving vessel", page73
u Navigate to the specified menu.
u Tap the specified button.
ð The pump applies a defined quantity of
H₃BO₃.
8.14 Aspirating manually
Specifications on the display:
8.14.1 Aspirating the sample tube manually
Operation Manual K-365 Kjel Line
NOTE
The aspiration time per keystroke can be changed in the
Specifications on the display:
u Navigate to the specified menu.
Set ting s
submenu.
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8 | Preparations for a determination
Stirring
...
Stirrer Speed
EDIT
...
SAVE
Büchi Labortechnik AG
Specifications on the display:
u Tap the specified button.
ð The pump aspirates liquid from the sample
tube.
8.14.2 Aspirating the receiving vessel manually
NOTE
The aspiration time per keystroke can be changed in the
u Navigate to the specified menu.
u Tap the specified button.
ð The pump aspirates liquid from the receiving
vessel.
8.15 Changing the stirring speed manually
u Navigate to the specified submenu.
[Sample Tube Aspiration]
Set ting s
submenu.
Specifications on the display:
[Receiver Aspiration]
Specifications on the display:
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the stirring speed.
u Tap the specified function on the function bar.
ð The stirring speed is saved.
76/106
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Preparations for a determination | 8
Operation Manual K-365 Kjel Line
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9 | Carrying out a determination
9 Carrying out a determination
9.1 Preparing the instrument
Navigation path
➔
Precondition:
R All commissioning operations have been completed. See Chapter5 "Installation",
page29
u Set the On/Off master switch to On.
ð The instrument is starting up.
u Make sure that no defective sealings or glass parts are used.
Büchi Labortechnik AG
u Navigate to the
u Tap the [READY] button on the function bar.
Hom e
menu according the navigation path.
ð The instrument is heating up.
u Install a receiving vessel (EasyKjel and BasicKjel only). See Chapter8.9 "Installing
a receiving vessel", page73
u Install the sample tube. See Chapter8.8 "Installing the sample tube", page72
u Close the protection shield.
u Flush the tubing. See Chapter8.13 "Dosing manually", page74
u Aspirate the receiving and the sample vessels. See Chapter8.14 "Aspirating
manually", page75
9.2 Starting a determination
Navigation path
➔
Precondition:
R The instrument is prepared. See Chapter9.1 "Preparing the instrument",
page78
R The sample is prepared.
78/106
R The connected instruments are prepared (MultiKjel only). See related
documentation.
Hom e
u Navigate to the
u Press the [PREP] button on the function bar.
menu according the navigation path.
ð Wait until the status bar shows the status READY.
u Select the operation mode. See Chapter8.12 "Selecting the operation mode",
page74
u Tap the [START] button on the function bar.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
...
Filter by
...
...
...
...
...
...
9.3 Ending a determination
Carrying out a determination | 9
Navigation path
➔
Precondition:
R The display shows the
u Confirm the message on the dialog.
Fin ishe d
dialog.
9.4 Shutting down the instrument
Precondition:
R The extraction process has ended.
u Shut down the connected instruments (MultiKjel only). See related
documentation.
u Clean the instrument. See Chapter10.3 "Cleaning the glass components",
page83
u Install an empty sample tube. See Chapter8.8 "Installing the sample tube",
page72
u Install an empty receiving vessel (EasyKjel and BasicKjel only). See Chapter8.9
"Installing a receiving vessel", page73
u Set the On/Off master switch to Off.
9.5 Filtering determination data
u Navigate to the specified menu.
Specifications on the display:
u Select the specified action.
u Select the filter you wish to use.
9.6 Showing determination data
u Navigate to the specified submenu.
u Select the determination you wish to view.
ð The display shows the data of the
determination.
9.7 Deleting determination data
9.7.1 Deleting one determination
u Navigate to the specified menu.
u Select the determination you wish to delete.
Specifications on the display:
Operation Manual K-365 Kjel Line
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9 | Carrying out a determination
DELETE
DEL ALL
...
EXPORT
EXPORT
ALL
u Tap the specified function on the function bar.
u Confirm the secure question.
ð The determination data is deleted.
9.7.2 Deleting all determination data
u Navigate to the specified menu.
u Tap the specified function on the function bar.
u Confirm the secure question.
ð All determination data are deleted.
9.8 Exporting determination data (Interface pro only)
9.8.1 Exporting one determination (Interface pro only)
Büchi Labortechnik AG
Specifications on the display:
Specifications on the display:
Specifications on the display:
Precondition:
R A storage medium is available. See Chapter
"Settings submenu", page48
u Navigate to the specified menu.
u Select the determination you wish to export.
u Tap the specified function on the function bar.
9.8.2 Exporting all determination data (Interface pro only)
Specifications on the display:
u Navigate to the specified menu.
u Tap the specified function on the function bar.
80/106
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
10 Cleaning and servicing
Cleaning and servicing | 10
NOTE
Users may only carry out the servicing and cleaning operations described in this
section.
Any servicing and repair work which involves opening up the casing may only be
carried out by BUCHI service technicians.
u Use only genuine BUCHI consumables and spare parts in order to ensure correct
operation of the device and preserve the warranty.
Operation Manual K-365 Kjel Line
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10 | Cleaning and servicing
10.1 Regular maintenance work
Büchi Labortechnik AG
Action
10.2 Cleaning and servicing the
Daily
Weekly
Monthly
1 Carry out this action before
sample tube
10.3 Cleaning the glass compo-
1 Carry out this action after
nents
10.4 Cleaning and servicing the
2
hoses and hose connections
10.5 Cleaning and servicing the
2 Replace the sample tube
sample tube seal
10.6 Cleaning and servicing the
2 Replace the glass splash
splash protector
10.7 Cleaning and servicing the
2 Replace the tube once per
steam inlet and condenser
outlet tube
10.8 Cleaning the housing 2
10.9 Cleaning and servicing the
2
warning and directive symbols
10.10 Cleaning and servicing the
2 Replace the bridge once
bridge splash protector to
condenser
10.11 Cleaning and servicing the
2 Replace the NaOH pump
dosing pumps
10.12 Cleaning and servicing the
2
condenser
10.13 Cleaning and servicing the
2
steam generator
10.14.1 Calibrating the H₂O pump 2
10.14.2 Calibrating the acid pump 2
10.14.3 Calibrating the NaOH pump 2
10.14.4 Calibrating the H₃BO₃
2
Pump
10.15 Decalcifying the instrument 2
Additional information
Yearly
every instrument use.
every instrument use.
seal twice per year
protector after ~ 3500 distillations (twice per year).
Replace the plastic splash
protector once in 2 years.
year.
per year.
once per year
82/106
1 - User; 2 - Operator
10.2 Cleaning and servicing the sample tube
u Before using, check the sample tube for defects (cracks/splintering).
u Prevent temperature shocks on the sample tubes.
ð Temperature shocks may lead to breakage.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Cleaning
...
SAVE
START
10.3 Cleaning the glass components
Cleaning and servicing | 10
Cleaning
If cleaning with a dishwashing machine:
u Make sure, that there is no contact with other glassware.
Storage (e.g. drawer)
u Prevent rolling and small hits.
ð This can cause hair cracks which may lead to breakages.
The following values for the cleaning can be adjusted (the list differs according to the
instrument configuration):
[H₂O Volume]
[Steam Power]
[Distillation Time]
[Sample Tube Aspiration]
[Receiver Aspiration]
Specifications on the display:
Precondition:
R A sample tube is installed. See Chapter8.8
"Installing the sample tube", page72
R A sample receiving vessel is installed. See
Chapter8.9 "Installing a receiving vessel",
page73
u Navigate to the specified submenu.
u Adjust the values according to your needs.
u Confirm the entries with the specified function
in the function bar.
u Tap the specified function on the function bar.
10.4 Cleaning and servicing the hoses and hose connections
u Check the hoses and hose connections for defects (cracks, brittle areas).
u If defective, replace the hoses.
10.5 Cleaning and servicing the sample tube seal
Operation Manual K-365 Kjel Line
u Check the seal for the following damage that may cause leakage:
Deterioration (surface roughness)
Deformation (rubber shape)
Residues (dirt, white crystals)
u Rinse the seal with water.
83/106
10 | Cleaning and servicing
10.6 Cleaning and servicing the splash protector
10.7 Cleaning and servicing the steam inlet and condenser outlet tube
10.8 Cleaning the housing
Büchi Labortechnik AG
u If necessary, replace the seal. See Chapter10.21 "Replacing the sample tube
seal", page90
u Check for leaks on the connectors.
u Check for residues inside the splash protector.
u Check the glass wall of the main body and the connectors.
ð If the part is dirty, clean it with detergents.
ð If the glass part is showing deterioration (transparency loss/reams in the glass
wall) or leakages (white residues), replace it.
u Check the tubes concerning dirt or residues.
u Clean and replace periodically depending on the use.
u Wipe down the housing with a damp cloth.
u If heavily soiled, use ethanol or a mild detergent.
u Wipe down the display with a damp cloth.
10.9 Cleaning and servicing the warning and directive symbols
u Check that the warning symbols on the instrument are legible.
u If they are dirty, clean them.
10.10 Cleaning and servicing the bridge splash protector to condenser
u Check if it is tight.
u Check for residues inside the tube.
u If necessary, clean it with a brush and water.
10.11 Cleaning and servicing the dosing pumps
u Check the pump connectors in the dosing pump window for:
Leakages
Crystallization
u If necessary, contact BUCHI customer service.
10.12 Cleaning and servicing the condenser
Decalcification solution:
160 g citric acid or 80 g amidosulfuric acid dissolved in 0.8 L water.
84/106
u Check if the cooling media of the condenser is transparent.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Pump Calibration
H₂O
...
Nominal Volume
EDIT
...
START
...
SAVE
10.13 Cleaning and servicing the steam generator
10.14 Calibrating the pumps
10.14.1Calibrating the H₂O pump
Cleaning and servicing | 10
u Check if the inside of the coil is showing condensation droplets.
ð If droplets appear:
Flush the condenser coil through the condensate expansion vessel with an 1%
hydrochloric acid.
Flush the condenser coil through the condensate expansion vessel with water and
water/ethanol mixture.
u Clean the condenser on the outside of the coil (water connectors) with
decalcification solution to remove chalk, algae, and rust.
u Check the distillation volume.
ð If the condensate amount is less than 160 mL water/per 5 minutes distillation
(after preheating), decalcify the instrument. See Chapter10.15 "Decalcifying the
instrument", page87
Precondition:
R A sample tube is installed. See Chapter8.8
"Installing the sample tube", page72
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the calibration volume you wish to use.
u Tap the specified function on the function bar.
u Wait until the display shows a numeric dialog.
Specifications on the display:
Operation Manual K-365 Kjel Line
u Remove the sample tube.
u Measure the volume in the sample tube.
u Enter the value in the numeric dialog.
u Tap the specified function on the function bar.
85/106
10 | Cleaning and servicing
Pump Calibration
Acid
START
...
SAVE
Pump Calibration
NaOH
...
Nominal Volume
EDIT
...
START
...
SAVE
10.14.2Calibrating the acid pump
Büchi Labortechnik AG
Specifications on the display:
Precondition:
R A sample tube is installed. See Chapter8.9
"Installing a receiving vessel", page73
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Wait until the display shows a numeric dialog.
u Remove the sample tube.
u Measure the volume in the sample tube.
u Enter the value in the numeric dialog.
u Tap the specified function on the function bar.
10.14.3Calibrating the NaOH pump
Precondition:
R A sample tube is installed. See Chapter8.9
"Installing a receiving vessel", page73
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the calibration volume you wish to use.
u Tap the specified function on the function bar.
Specifications on the display:
86/106
u Wait until the display shows a numeric dialog.
u Remove the sample tube.
u Measure the volume in the sample tube.
u Enter the value in the numeric dialog.
u Tap the specified function on the function bar.
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Pump Calibration
H₃BO₃
...
Nominal Volume
EDIT
...
START
...
SAVE
10.14.4Calibrating the H₃BO₃ Pump
Cleaning and servicing | 10
Specifications on the display:
Precondition:
R A receiving vessel is installed. See Chapter8.9
"Installing a receiving vessel", page73
u Navigate to the specified submenu.
u Select the specified action.
u Tap the specified function on the function bar.
u Enter the calibration volume you wish to use.
u Tap the specified function on the function bar.
u Wait until the display shows a numeric dialog.
u Remove the sample receiving vessel.
u Measure the volume in the sample receiving
vessel.
u Enter the measured volume.
u Tap the specified function on the function bar.
10.15 Decalcifying the instrument
Time required: approximately 2.5 hours
Decalcification solution:
160 g citric acid or 80 g amidosulfuric acid dissolved in 0.8 L water.
Precondition:
R The instrument temperature is the same as the ambient temperature.
u Remove the water from the instrument. See Chapter12.4 "Removing water from
the steam generator", page98
u Prepare the decalcification solution.
u Install a suitable hose to the H₂O supply for steam generation.
u Put the other end of the hose in the decalcification solution.
u Set the On/Off master switch to On.
u Press the [READY] button on the function bar.
u Wait until the pumps stop working.
u Set the On/Off master switch to Off.
u Wait 30 minutes.
Operation Manual K-365 Kjel Line
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10 | Cleaning and servicing
10.16 Replacing the splash protector
Büchi Labortechnik AG
u Remove the decalcification solution from the instrument. See Chapter12.4
"Removing water from the steam generator", page98
u Do steps (5) thru (10) again.
u Install the H₂O supply for steam generation.
u Set the On/Off master switch to On.
u Press the [READY] button on the function bar.
u Wait until the pumps stop working.
u Set the On/Off master switch to Off.
u Remove the water from the instrument. See Chapter12.4 "Removing water from
the steam generator", page98
u Do steps (11) thru (16) five times.
NOTE
Installing is done in reverse sequence.
u Remove the protection shield. See
Chapter10.18 "Attaching and removing the
protection shield", page89
u Loosen the cap nut at the splash protector.
u Open the splash protector nut.
u Remove the splash protector.
88/106
u Remove the steam connection.
u Remove the NaOH/acid connection (according
to the instrument configuration).
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
10.17 Replacing the condenser
Cleaning and servicing | 10
NOTE
Installing is done in reverse sequence.
u Remove the protection shield. See
Chapter10.18 "Attaching and removing the
protection shield", page89
u Loosen the cap nut at the condenser.
u Remove the cooling water hoses.
u Remove the rubber band.
10.18 Attaching and removing the protection shield
10.18.1Removing the protection shield
u Pull the protection shield from the instrument.
Operation Manual K-365 Kjel Line
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10 | Cleaning and servicing
10.18.2Attaching the protection shield
10.19 Cleaning the drip tray
Büchi Labortechnik AG
u Attach the protection shield onto the
instrument.
u Pull the drip tray.
u Rinse the trip tray with water.
10.20 Rinsing a pump
Precondition:
R A sample tube is installed. See Chapter8.8 "Installing the sample tube", page72
u Put the side of the hose in distilled water.
u Apply 100 mL with the manual functions. See Chapter8.13 "Dosing manually",
page74
10.21 Replacing the sample tube seal
NOTE
Installing is done in reverse sequence.
NOTE
Make the seal moist with water before installation.
u Remove the protection shield. See
Chapter10.18.1 "Removing the protection
shield", page89
u Loosen the cap nut.
90/106
Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Cleaning and servicing | 10
u Open the splash protector nut.
u Remove the splash protector.
u Remove the seal.
Operation Manual K-365 Kjel Line
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11 | Help with faults
11 Help with faults
11.1 Troubleshooting digestion
Büchi Labortechnik AG
Problem Possible cause Action
Crystallization after
digestion
Samples do not get
clear
False ratio of H2SO4 to catalyst. u Use KjelOptimizer software
to optimize the digestion
(download available on
BUCHI website).
Digestion time too long. u Decrease digestion time.
u Compare to conditions to
similar applications.
Suction capacity of scrubber
too strong.
u Lower the suction capacity
on the scrubber. See
"Scrubber " operation
manual
No or not enough catalyst
used.
u Use KjelOptimizer software
to optimize the digestion
(download available on
BUCHI website).
Digestion temperature is too
low.
u Decrease digestion time.
u Compare to conditions to
similar applications.
Temperature is too high. u Decrease digestion
temperature.
Sealing material was flushed
u Check the sealing.
into the sample.
Fume leakage The seals are defective. u Replace the seals.
Suction capacity of scrubber is
too weak.
u Carry out the scrubber
maintenance. See "Scrubber
" operation manual
Leakage in the system, e.g.
hose connector not tight.
u Check connections between
digester and scrubber.
Blocked hoses. u Clean the hoses.
Reduced suction on the bypass
valve.
Boiling retardation/
bumping/foaming
Missing digestion rods or boiling stones.
Missing antifoam tablet or
u Add boiling rods during
digestion.
u Add antifoam tablet.
other anti-foaming agent.
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Help with faults | 11
Problem Possible cause Action
Samples do not get
Air in NaOH hose. u Flush the system. See
dark blue/brown after addition of
NaOH
No catalyst used for digestion
(only H2O2 or Kjeldahl tablets
ECO).
11.2 Troubleshooting distillation
Problem Possible cause Action
Splashing during distillation or addition
of chemicals
Measured nitrogen
content is too high
The sample tube is too small. u Select a bigger sample tube.
Sample volume too high. u Lower sample volume.
Amount of water used for dilu-
tion is too low.
Air in titration system, burette
or tubes.
Carry over during distillation. u Insert less sample.
Chapter8.13 "Dosing
manually", page74
u Increase dilution volume.
u Tighten the connections.
u Flush the tubing with titrant.
u Refill burette.
u Avoid big concentration
differences in measurement
series.
Titrant concentration too high. u Lower the titrant
concentration.
Error in calculation. u Check calculation.
u Check titration parameters.
u Check the titer for the
titrant in use.
pH electrode is defective. u Maintain electrode. See
related documentation
u If necessary, replace it.
The glassware is dirty. u Clean the glassware. See
Chapter10.2 "Cleaning and
servicing the sample tube",
page82
Operation Manual K-365 Kjel Line
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11 | Help with faults
Büchi Labortechnik AG
Problem Possible cause Action
Measured nitrogen
content is too low
Incomplete digestion. u Increase digestion time.
u Use different Kjeldahl tablet.
The H₂SO₄ volume is too low. u Use KjelOptimizer software
to optimize the digestion
(download available on
BUCHI website).
Kjeldahl Tablets and H₂SO₄ in
wrong ratio.
u Correct ratio of Kjeldahl
Tablets and H₂SO₄.
u Use KjelOptimizer software
to optimize the digestion
(download available on
BUCHI website).
Nitrogen content per sample
tube is too high.
u Not apply more than 200 mg
Nitrogen per sample tube.
u Use KjelOptimizer software
to optimize the digestion
(download available on
BUCHI website).
Not enough NaOH or incorrect
concentration of NaOH used
(required is 32 %)
u Correct volume for complete
alkalization of the digested
sample.
Leakage during distillation. u Check connection between
condenser and splash
protector.
u Tighten the connection.
u If necessary, replace it.
Titrant solution u Check titer of titrant.
pH electrode is defective. u Maintain electrode. See
related documentation
u If necessary, replace it.
The glassware is dirty. u Clean the glassware. See
Chapter10.2 "Cleaning and
servicing the sample tube",
page82
Incorrect weighing. u Use weighing boats (easy
sample transfer from
balance to sample tube).
u Use anti-static equipment.
u Use larger sample sizes.
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Operation Manual K-365 Kjel Line
Büchi Labortechnik AG
Help with faults | 11
Problem Possible cause Action
Poor repeatability Air bubbles in titration system,
burette, tubes.
Aspiration not working prop-
erly.
Sample is inhomogeneous. u Homogenize the sample.
Sample weighing problems. u Use weighing boats (easy
Incomplete digestion, diges-
tion time too short.
u Tighten the connections.
u Flush the tubing with titrant.
u Refill burette.
u Check for leaks.
u Tighten the connections.
sample transfer from
balance to sample tube).
u Use anti-static equipment.
u To decrease the degree of
error, keep the weighed
sample portion as high as
possible.
u Choose digestion time
accordingly.
u Check color of samples
during digestion.
ð Solution should be
transparent by the end of
the digestion.
Stirrer is defective. u Clean the stirrer.
Loose contact of the sensor ca-
bles.
11.3 Troubleshooting instrument
Problem Possible cause Action
The instrument
does not work
The installation site has no
power supply.
The instrument is not con-
nected to the power supply.
The power supply cable is de-
fect.
The fuse was triggered. u Reset the fuse
u If necessary, replace the
stirrer.
u Check the sensor cables.
u Check the power supply of
the installation site.
u Connect the instrument to
the power supply. See
Chapter5.2 "Establishing
electrical connections",
page29
u Replace the power supply
cable.
Operation Manual K-365 Kjel Line
The switch is defect. u Contact BUCHI Customer
Service.
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11 | Help with faults
Büchi Labortechnik AG
Problem Possible cause Action
Steam generator is
not reaching the
Not enough water in the steam
generator.
status Ready
Display is black The connection between in-
strument and display is interrupted.
No cooling water
flow
The cooling water supply is
blocked.
u Make sure, that the
installation H₂O supply for
steam generation is correct.
u Make sure, that there is
enough water in the
canister.
u Make sure, that the hose is
submerged in the water.
u Check for leaks between
instrument and canister.
u Check water level status in
the steam generator.
u Check the connection cable
from the instrument to the
display.
u Contact BUCHI Customer
Service.
u Make sure, that the hoses
are not bend.
u Check for leaks between
instrument and cooling
water source.
Dosing pump is not
feeding
Aspiration is not
working
Water flow sensor blocked. u Clean the hoses.
Not enough liquid for feeding. u Make sure, that the
installation is correct.
u Make sure, that there is
enough liquid in the
canister.
u Make sure, that the hose is
submerged in the liquid.
u Check for leaks between
instrument and canister.
u Make sure that liquid is
inside the pump.
Leaks u Check the hoses connected
with the pump for leaks and
deterioration.
The aspiration pump is defect. u Check if the wheel inside the
pump is turning.
u Contact BUCHI Customer
Service.
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Büchi Labortechnik AG
11.4 Turning the splash protector nut
Help with faults | 11
u Turn the splash protector nut.
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12 | Taking out of service and disposal
12 Taking out of service and disposal
12.1 Taking out of service
u Rinse all pumps. See Chapter10.20 "Rinsing a pump", page90
u Remove the water from the steam generator. See Chapter12.4 "Removing water
from the steam generator", page98
u Remove all reagents and coolants.
u Clean the instrument.
u Set the On/Off master switch to Off.
u Disconnect the power supply.
u Remove all tubing and cables from the instrument.
12.2 Disposal
The operator is responsible for proper disposal of the instrument.
u When disposing of equipment observe the local regulations and statutory
requirements regarding waste disposal.
u When disposing, observe the disposal regulations of the materials used. Materials
used see Chapter3.5 "Technical data", page24
Büchi Labortechnik AG
12.3 Returning the instrument
Before returning the instrument, contact the BÜCHI Labortechnik AG Service
Department.
https://www.buchi.com/contact
12.4 Removing water from the steam generator
Precondition:
R The On / Off master switch is set to Off.
u Install a drain hose to the connection marked
Steam Generator OUT.
u Put the other end of the hose in a sink.
u Open the valve.
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Büchi Labortechnik AG
13 Appendix
13.1 Spare parts and accessories
13.1.1 Accessories
Appendix | 13
Order no. Image
Reaction detection sensor 11072666
OnLevel sensor 11070270
Tank level sensor kit 11072294
Eco Titrator 11072748
StatusLight cpl., incl. communication cable
Indicates the status of the instrument (instrument is ready
to use, has an error or is in operation).
BUCHI Bluetooth® Dongle, connects instrument
11068959
11067770
to smartphone via Bluetooth®
Adapter for 3rd party sample tubes 11072398
Sample tube holder (4x 500 mL tubes) 016951
Sample tube holder (6 x 300 mL tubes) 043039
Sample tube holder (12 x 300 mL tubes) 043041
SO₂ absorption glass set 11073599
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13 | Appendix
Büchi Labortechnik AG
Order no. Image
Cyanide caps
Caps for hermetical closing of all types of Kjeldahl sample
tubes during sample preparation for cyanide in food
Communication cableRJ45, 2 m
Connection between vacuum controller/interface and recirculating chiller, vacuum controller/interface and vacuum
pump or steam distillation unit and Eco titrator.
Dispenser unit Titronic 300 11062956
13.1.2 Splash protector spare parts
Glass splash protector 11071013
Plastic splash protector 11070670
11067871
044989
Order no. Image
Devarda splash protector 11071014
Sealing sample tube to splash protector 043068
Steam inlet tubing to sample tube 043424
Steam inlet tubing to sample tube (750 mL) 043119
Connecting piece 019002
Bridge splash protector to condenser 11070620
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