Buchi K-365 Dist Line User manual

K-365 Dist Line
Operation Manual
11594193 | B en

Imprint
Product Identification:
Operation Manual (Original) K-365 Dist Line
11594193
Publication date: 11.2021
Version B
BÜCHI Labortechnik AG
Meierseggstrasse 40
Postfach
CH-9230 Flawil 1
E-Mail: [email protected]
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
Operation Manual K-365 Dist Line iii
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 .................................................................................................................23
3.4 Type plate............................................................................................................................23
3.5 Technical data .....................................................................................................................24
3.5.1 K-365 Dist 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

Table of contents Büchi Labortechnik AG
iv Operation Manual K-365 Dist Line
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 (BasicDist, MultiDist, MultiDist T only).....................31
5.7 Installing the sample waste pump connection (MultiDist T only) .........................................32
5.8 Installing the H₂O supply for steam generation ...................................................................32
5.9 Installing NaOH supply (MultiDist, MultiDist T only) ............................................................33
5.10 Installing H₃BO₃ supply (MultiDist, MultiDist T only) ............................................................33
5.11 Installing the H₂O supply for the sample tube (MultiDist, MultiDist T only)..........................34
5.12 Installing the level sensor on the canister (option) ..............................................................35
5.13 Installing a titrator with LAN (MultiDist T with Eco Titrator only)..........................................35
5.14 Installing a titrator with RS232 (MultiDist T only).................................................................36
5.15 Installing a dispenser (MultiDist T only)...............................................................................37
5.16 Installing the reaction detection sensor (MultiDist 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 (MultiDist 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

Büchi Labortechnik AG Table of contents
Operation Manual K-365 Dist Line v
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 MultiDist only)............... 61
8.6.5 Changing the H₂O volume for a method (MultiDist only) ........................................62
8.6.6 Changing the H₂SO₄ volume for a method (MultiDist only) ....................................62
8.6.7 Changing the NaOH volume for a method (MultiDist only).....................................63
8.6.8 Changing the acid volume for a method (BasicDist, MultiDist only) .......................63
8.6.9 Changing the reaction time for a method (BasicDist, MultiDist 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 (MultiDist T only)..................67
8.6.16 Changing the titration type for a method (MultiDist T only) ....................................68
8.6.17 Changing the H₃BO₃ volume for a method (MultiDist only) ....................................68
8.6.18 Changing the dosing unit volume for a method (MultiDist T only) ..........................69
8.6.19 Changing the titration stirring speed for a method (MultiDist T only)......................69
8.6.20 Changing the titration start time for a method (MultiDist T only) ............................69
8.6.21 Changing the aspiration time for the sample tube for a method (BasicDist, MultiDist,
MultiDist T only)...................................................................................................... 70
8.6.22 Changing the aspiration time for the receiving vessel for a method (MultiDist 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

Table of contents Büchi Labortechnik AG
vi Operation Manual K-365 Dist Line
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
8.16 Switching valve adjustment (MultiDist only) ........................................................................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

Büchi Labortechnik AG Table of contents
Operation Manual K-365 Dist Line vii
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

Table of contents Büchi Labortechnik AG
viii Operation Manual K-365 Dist Line
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 ....................................................................................................105
13.1.11 Upgrade kits .........................................................................................................105
13.1.12 Documentation ..................................................................................................... 105

Büchi Labortechnik AG About this document | 1
Operation Manual K-365 Dist Line 9/106
1 About this document
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:
uContact BÜCHI Labortechnik AG Customer Service.
https://www.buchi.com/contact
1.1 Mark-ups and symbols
NOTE
This symbol draws attention to useful and important information.
RThis character draws attention to a requirement that must be met before the
instructions below are carried out.
uThis character indicates an instruction that must be carried out by the user.
ðThis character indicates the result of a correctly carried out instruction.
Mark-up Explanation
Window
Software Windows are marked-up like this.
Tab
Tabs are marked-up like this.
Dialog
Dialogs are marked-up like this.
[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.
1.3 Connected devices
In addition to these operating instructions, follow the instructions and specifications
in the documentation for the connected devices.

2 | Safety Büchi Labortechnik AG
10/106 Operation Manual K-365 Dist Line
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.
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 ([email protected]).

Büchi Labortechnik AG Safety | 2
Operation Manual K-365 Dist Line 11/106
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.
2.4 Personal protective equipment
Depending on the application, hazards due to heat and/or corrosive chemicals may
arise.
uAlways wear appropriate personal protective equipment such as safety goggles,
protective clothing and gloves.
uMake sure that the personal protective equipment meets the requirements of
the safety data sheets for all chemicals used.
2.5 Warning notices in this document
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
Device damage
Dangerous electrical voltage

2 | Safety Büchi Labortechnik AG
12/106 Operation Manual K-365 Dist Line
Symbol Meaning
Wear protective gloves
Wear safety goggles
Fig.1: Location of the warning and directive symbols
2.7 Protection devices
3
1
2
Fig.2: Protection devices
1 Protection shield 2 Protection shield
3 Stop button
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.

Büchi Labortechnik AG Safety | 2
Operation Manual K-365 Dist Line 13/106
2.8.1 Hot surfaces
The surfaces of the device can become very hot. If touched they can cause skin
burns.
uDo not touch hot surfaces or else wear suitable protective gloves.
2.8.2 Faults during operation
If a device is damaged, sharp edges, moving parts or exposed electrical wires can
cause injuries.
uRegularly check device for visible damage.
uIf faults occur, switch off the device immediately, unplug the power cord and
inform the operator.
uDo not continue to use devices that are damaged.
2.8.3 Glass breakage
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.
uUse recommended titrators only.
2.8.5 Dosing pump defect
A defect dosing pump can spill hazardous liquids on the installation site.
uSet the On / Off master switch to Off.
uDisconnect the power supply.
uUse personal protective equipment to remove the liquid.
uDispose of the remains of the liquid according to the local legal regulations.
2.9 Modifications
Unauthorized modifications can effect safety and lead to accidents.
uUse only genuine BUCHI accessories, spare parts and consumables.
uCarry out technical changes only with prior written approval from BUCHI.
uOnly allow changes to be made by BUCHI service technicians.
BUCHI accepts no liability for damage, faults and malfunctions resulting from
unauthorized modifications.

3 | Product description Büchi Labortechnik AG
14/106 Operation Manual K-365 Dist Line
3 Product description
3.1 Description of function
The instrument is suitable for determining steam-
volatile substances (e.g. of alcohol, sulfur dioxide,
volatile acids) and nitrogen by using Kjeldahl and
Devarda methods (MultiDist).
Steam is introduced into the sample solution to
drive out volatile components.
After condensation in condenser the
condensate is collected in a receiver solution.
3.2 Configuration
3.2.1 Front view
NOTE
The interface differs according to the configuration:
uInterface see Chapter6 "Description of the interface", page39
ðEasyDist, BasicDist
uInterface Pro see Chapter7 "Description of the interface pro", page45
ðBasicDist (option), MultiDist, MultiDist T

Büchi Labortechnik AG Product description | 3
Operation Manual K-365 Dist Line 15/106
4
3
5
9
8
7
1
2
6
Fig.3: Front view
1 Splash protector 2 Condenser
3 Ventilation slots 4 On/Off master switch
5 Ventilation slots 6 Receiving area
See Chapter3.2.3 "Receiving area",
page16
7 Sample tube 8 Handle
9 Interface
(according to the instrument configu-
ration)

3 | Product description Büchi Labortechnik AG
16/106 Operation Manual K-365 Dist Line
3.2.2 Rear view
4
14
12
11
10
13
12
3
5
6
7
9 8
Fig.4: Rear view
1 Communication connections
See Chapter3.2.4 "Communication
connections", page18
2 Ventilation slots
3 Ventilation slots 4 Dosing pumps window
5 Connections on the rear side
See Chapter3.2.5 "Connections on
the rear side", page20
6 Steam valve
7 Cooling water out 8 Drain connection
(according to the instrument configu-
ration)
9 Cooling water in 10 Ventilation slots
11 Rear cable duct 12 Power supply connection
13 Fuses
(resettable)
14 Type plate
See Chapter3.4 "Type plate",
page23
3.2.3 Receiving area
The receiving area is different for each instrument configuration.

Büchi Labortechnik AG Product description | 3
Operation Manual K-365 Dist Line 17/106
Receiving area
1
2
3
4
Fig.5: Receiving area
1 Rear cable duct 2 Cable duct reaction detection sensor
3 Condenser outlet 4 Receiving vessel area
Receiving area (MultiDist T only)
4
6
5
7
11
10
9
12
3
8
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
9 Retainer titration sensor 10 Retainer temperature sensor
11 Retainer dosing tip back titration

3 | Product description Büchi Labortechnik AG
18/106 Operation Manual K-365 Dist Line
3.2.4 Communication connections
Communication connection EasyDist
2
3
4
7
1
5
6
Fig.7: Communication connections
1 BUCHI standard communication port
(COM)
(marked COM)
2 BUCHI standard communication port
(COM)
(marked COM)
3 Level detection sensor port
(marked Level Detection)
4 H₂O tank level sensor port
(marked H₂O)
5 Communication port
(marked RS-232)
6 Communication port
(marked RS-232)
7 NaOH tank level sensor port
(marked NaOH)

Büchi Labortechnik AG Product description | 3
Operation Manual K-365 Dist Line 19/106
Communication connection BasicDist
3
4
5
6
11
10
9
1
2
7
8
Fig.8: Communication connection
1 LAN port
(marked LAN)
2 BUCHI standard communication port
(COM)
(marked COM)
3 BUCHI standard communication port
(COM)
(marked COM)
4 Level detection sensor port
(marked Level Detection)
5 H₂O tank level sensor port
(marked H₂O)
6 Waste tank level sensor port
(marked Sample Tube Waste)
7 Communication port
(marked RS-232)
8 Communication port
(marked RS-232)
9 Acid tank level sensor port
(marked Acid)
10 NaOH tank level sensor port
(marked NaOH)
11 USB port
(marked USB)

3 | Product description Büchi Labortechnik AG
20/106 Operation Manual K-365 Dist Line
Communication connection MultiDist
3
6
7
8
9
4
5
15
14
13
12
1
2
10
11
Fig.9: Communication connections
1 LAN port
(marked LAN)
2 BUCHI standard communication port
(COM)
(marked COM)
3 BUCHI standard communication port
(COM)
(marked COM)
4 BUCHI standard communication port
(COM)
(marked COM)
5 Stirrer port
(marked Stirrer)
6 Level detection sensor port
(marked Level Detection)
7 H₂O tank level sensor port
(marked H₂O)
8 H₃BO₃ tank level sensor port
(marked H₃BO₃)
9 Waste tank level sensor port
(marked Sample Tube Waste)
10 Dispenser port
(marked Dosing Unit)
11 Titrator port
(marked Titrator)
12 Acid tank level sensor port
(marked Acid)
13 Waste tank level sensor port
(marked Receiver Waste)
14 NaOH tank level sensor port
(marked NaOH)
15 USB port
(marked USB)
3.2.5 Connections on the rear side
The connections on the rear side are depending on the version of the instrument.