Endress+Hauser Analytik Jena multi N/C 2100S User manual

Operating Manual
multi N/C 2100S (duo, pharma)
TOC/TNb Analyzers

Manufacturer Analytik Jena GmbH
Konrad-Zuse-Strasse 1
07745 Jena / Germany
Phone: [phone]
Fax: [phone]
Email: [email protected]
Technical Service AnalytikJenaGmbH
Konrad-Zuse-Strasse 1
07745 Jena / Germany
Phone: [phone]
Fax: [phone]
Email: [email protected]
General Information http://www.analytik-jena.com
Documentation Number 11-0109-001-23
Edition C (12/2021)
Technical Documentation Analytik Jena GmbH
© Copyright 2021, Analytik Jena GmbH
For a proper and safe use of this product follow the instructions. Keep the
operating manual for future reference.

multi N/C 2100S (duo, pharma) Table of contents
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Table of contents
1 Basic information............................................................................................................................................................ 7
1.1 About this user manual .................................................................................................................................... 7
1.2 Analyzer area of application ............................................................................................................................ 8
1.3 Intended use ..................................................................................................................................................... 8
2 Security............................................................................................................................................................................ 10
2.1 Safety labeling on the device ........................................................................................................................... 10
2.2 Requirements for the operating personnel..................................................................................................... 11
2.3 Safety instructions, transport and commissioning ......................................................................................... 11
2.4 Safety instructions: during operation .............................................................................................................. 12
2.4.1 Summary of safety instructions ....................................................................................................................... 12
2.4.2 Safety instructions – protection against explosion and fire........................................................................... 12
2.4.3 Electrical system safety instructions................................................................................................................ 13
2.4.4 Safety instructions for the operation of compressed gas containers and compressed gas systems............ 13
2.4.5 Handling of auxiliary and operating materials ............................................................................................... 13
2.4.6 Safety instructions – maintenance and repair ................................................................................................ 14
2.5 Behavior during emergencies .......................................................................................................................... 15
3 Function and design ....................................................................................................................................................... 16
3.1 Layout................................................................................................................................................................ 16
3.1.1 Sample supply system ...................................................................................................................................... 17
3.1.2 Hose system...................................................................................................................................................... 18
3.1.3 Combustion system .......................................................................................................................................... 21
3.1.4 Measuring gas drying and cleaning................................................................................................................. 21
3.1.5 Detection........................................................................................................................................................... 24
3.1.6 Indicator and control elements, connections.................................................................................................. 25
3.1.7 Accessories........................................................................................................................................................ 27
3.2 Additional options for the analyzer ................................................................................................................. 27
3.3 Function and measuring principle ................................................................................................................... 28
3.4 Measuring methods ......................................................................................................................................... 29
3.4.1 TC analysis......................................................................................................................................................... 29
3.4.2 TOC analysis...................................................................................................................................................... 29
3.4.3 TIC analysis ....................................................................................................................................................... 29
3.4.4 NPOC analysis................................................................................................................................................... 30
3.4.5 DOC analysis...................................................................................................................................................... 30
3.4.6 TNb analysis....................................................................................................................................................... 30
3.5 Catalysts ............................................................................................................................................................ 31
3.6 Calibration......................................................................................................................................................... 31
3.6.1 Calibration strategies........................................................................................................................................ 31
3.6.2 Daily factor ........................................................................................................................................................ 32
3.6.3 Calibration method........................................................................................................................................... 32
3.6.4 Method characteristics..................................................................................................................................... 33
3.6.5 Other calculations............................................................................................................................................. 34
3.7 Blank values ...................................................................................................................................................... 34
3.7.1 Water blank values ........................................................................................................................................... 34
3.7.2 Eluate blank value ............................................................................................................................................ 35
3.7.3 Boat blank value ............................................................................................................................................... 36

Table of contents multi N/C 2100S (duo, pharma)
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4 Installation and commissioning..................................................................................................................................... 37
4.1 Installation conditions...................................................................................................................................... 37
4.1.1 Ambient conditions .......................................................................................................................................... 37
4.1.2 Device layout and space requirements............................................................................................................ 37
4.1.3 Power supply..................................................................................................................................................... 38
4.1.4 Gas supply ......................................................................................................................................................... 38
4.2 Unpacking and setting up the device............................................................................................................... 39
4.2.1 Installing and commissioning the analyzer..................................................................................................... 39
4.3 Connecting accessories..................................................................................................................................... 42
4.3.1 AS 60 autosampler .......................................................................................................................................... 42
4.3.2 Chemiluminescence detector (CLD)................................................................................................................. 45
4.3.3 External solids module ..................................................................................................................................... 47
4.3.4 Integrated solids module.................................................................................................................................. 48
5 Operation ........................................................................................................................................................................ 52
5.1 General notes.................................................................................................................................................... 52
5.2 Switching on the analyzer................................................................................................................................ 53
5.3 Switching off the analyzer................................................................................................................................ 54
5.4 Carrying out calibration.................................................................................................................................... 54
5.4.1 Preparing and starting calibration................................................................................................................... 54
5.4.2 Displaying the calibration results..................................................................................................................... 56
5.4.3 Editing calibration ............................................................................................................................................ 58
5.4.4 Linking a calibration to a method.................................................................................................................... 58
5.4.5 Managing calibration data............................................................................................................................... 60
5.5 Performing measurements .............................................................................................................................. 60
5.5.1 Measurement with manual sample feed ........................................................................................................ 60
5.5.2 Measurement with autosampler ..................................................................................................................... 62
5.6 Operating the integrated solids module ......................................................................................................... 63
6 Maintenance and care.................................................................................................................................................... 65
6.1 Maintenance overview..................................................................................................................................... 65
6.2 Adjustment and setting.................................................................................................................................... 66
6.2.1 Adjusting the autosampler............................................................................................................................... 66
6.2.2 Setting the NPOC purge flow ........................................................................................................................... 68
6.3 Maintenance for lock septums......................................................................................................................... 70
6.4 Replacing the pump hose................................................................................................................................. 71
6.5 Replacing the hose connections ...................................................................................................................... 73
6.6 Checking the system for leaks.......................................................................................................................... 74
6.7 Replacing the catalyst....................................................................................................................................... 75
6.7.1 Removing the combustion tube....................................................................................................................... 75
6.7.2 Filling the combustion tube ............................................................................................................................. 76
6.7.3 Installing the combustion tube ........................................................................................................................ 78
6.8 Removing and installing the combustion furnace.......................................................................................... 80
6.8.1 Removing the combustion furnace.................................................................................................................. 80
6.8.2 Installing the combustion furnace................................................................................................................... 81
6.9 Cleaning the TIC condensate container and condensation coil ..................................................................... 82
6.10 Replacing the water traps ................................................................................................................................ 86
6.11 Replacing the halogen trap.............................................................................................................................. 89
6.12 Removing the integrated solids module ......................................................................................................... 91

multi N/C 2100S (duo, pharma) Table of contents
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6.13 Maintaining the chemiluminescence detector (CLD)..................................................................................... 92
7 Troubleshooting.............................................................................................................................................................. 93
7.1 Software error messages.................................................................................................................................. 93
7.2 Status errors...................................................................................................................................................... 97
7.3 Device errors ..................................................................................................................................................... 99
8 Disposal ........................................................................................................................................................................... 104
9 Transport and storage .................................................................................................................................................... 105
9.1 Transport...........................................................................................................................................................105
9.1.1 Preparing the analyzer for transport...............................................................................................................105
9.1.2 Moving the device in the laboratory................................................................................................................106
9.2 Storage ..............................................................................................................................................................107
10 Specifications .................................................................................................................................................................. 108
10.1 Technical data...................................................................................................................................................108
10.2 Standards and directives ..................................................................................................................................109
11 Revision Overview........................................................................................................................................................... 111

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multi N/C 2100S (duo, pharma) Basic information
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1 Basic information
1.1 About this user manual
Content The operating manual describes the following device model(s):
¡multi N/C 2100S
¡multiN/C2100Sduo
¡multiN/C2100Spharma
In this manual, these models are collectively referred to as the multi N/C 2100S. Any
differences between the models are explained in the relevant section.
The device is intended to be operated by qualified specialist personnel under observance
of the operating manual.
The operating manual provides information about the design and operation of the de-
vice and provides operating personnel with the necessary know-how for safe handling of
the device and its components. Furthermore, the operating manual includes information
on the maintenance and servicing of the device as well as information on potential
causes of malfunctions and their correction.
The multiN/C2100Sduo modular measuring system enables automated analysis of liq-
uid and solid samples. The layout, installation and operation of the modular measuring
system are described in the user manual for the HT 1300 solids module. Pay particular
attention to the information on switching between liquid and solid operation given
there.
The multiN/C2100Spharma model is a special model for pharmaceutical nitrogen
analysis. Please observe that the information in this manual referring to determination
of carbon content does not apply to the pharma model. In addition, no solids modules
and no ChD detectors are available for this model.
Conventions Instructions for actions occurring in chronological order are numbered and combined
into action units.
Warnings are indicated by a warning triangle and a signal word. The type, source and
consequences of the hazard are stated together with notes on preventing the hazard.
Elements of the control and analysis program are indicated as follows:
¡Program terms are in bold (e.g., the System menu).
¡Buttons are indicated by square brackets (e.g., [OK]).
¡Menu items are separated by vertical lines (e.g., System | Device).
Symbols and signal words used
in this manual
The user manual uses the following symbols and signal words to indicate hazards or in-
structions. These warnings are always placed before an action.
WARNING
Indicates a potentially hazardous situation which can cause death or very serious (possi-
bly permanent) injury.
CAUTION
Indicates a potentially hazardous situation which can cause slight or minor injuries.

Basic information multi N/C 2100S (duo, pharma)
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NOTICE
Provides information on potential material or environmental damage.
1.2 Analyzer area of application
¡multiN/C2100Spharma: Special model for pharmaceutical total nitrogen analysis
The special vaccine analyzer provides quick and fully automatic total protein analysis. It
is used to quantify attenuated or devitalized viruses or bacteria, as well as antigenes in
pharmaceutical quality control.
This model is alway supplied with a chemiluminescence detector (CLD). It does not in-
clude an NDIR detector for carbon detection. The control and analysis software provides
complete data integrity and conforms to the pharmaceutical guidelines in 21CFR
Part11 and EudraLex Volume4 Annex11.
¡Use in water treatment
The device can be used for both drinking water and waste water analysis in communal
and industrial treatment systems. Complex water bodies containing particles or salt can
also be safely analyzed.
¡Use in environmental monitoring
Surface waters such as seawater often have low TOC content with high TIC concentra-
tions and high salinity. These difficult samples can be analyzed thanks to special analysis
modes (NPOC plus).
¡Use in power plants and laboratories
With its dynamic measurement range, the analyzer provides TOC detection for power
plants and in industrial steam production.
¡Analysis of waste and soil samples
Carbon detection (TC/TOC detection) in solid samples is possible by adding a solids
module to the device. Additionally, eluates can be analyzed. In these and other liquid
samples, TC and TNb can be determined simultaneously.
¡Use in research and education
Due to its many configuration options, the analyzer is suitable for research and educa-
tion. TC and TOC can be determined in solids in conjunction with a solids module.
1.3 Intended use
The device and its components may only be used for the analyses listed in the user man-
ual. Only this specified use is regarded as the intended use, ensuring the safety of the
user and the device.
The analyzer may only be used to determine the total carbon content and the concen-
tration of organic and inorganic bound carbon in aqueous samples.
The analyzer is particularly suited for detection of the listed parameters in drinking wa-
ter, ground water, surface water, ultrapure water and water for pharmaceutical pur-
poses.
When equipped with a nitrogen detector, the analyzer can be used to examine the nitro-
gen content in aqueous samples.

multi N/C 2100S (duo, pharma) Basic information
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In conjunction with an optional solids module, the total carbon content in solids can be
determined.
No flammable liquids or substances that can form explosive mixtures may be analyzed
with the analyzer. Do not analyze concentrated acids with the analyzer!
Only use the following carrier gases with the device: Oxygen, synthetic air or purified
compressed air.

Security multi N/C 2100S (duo, pharma)
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2 Security
For your own safety and to ensure error-free and safe operation of the device, please
read this chapter carefully before commissioning.
Observe all safety instructions listed in this user manual and all messages and infor-
mation displayed on the monitor by the control and analysis software.
2.1 Safety labeling on the device
Warning and mandatory action labels have been attached to the device and must al-
ways be observed.
Damaged or missing warning and mandatory action labels can cause incorrect ac-
tions leading to personal injury or material damage. The labels must not be removed.
Damaged warning and mandatory action labels must be replaced immediately!
The following warning and mandatory action labels have been attached to the de-
vice:
Warning symbol Meaning Comment
Warning against hot
surface
¡On the furnace, on the furnace
cover:
¡On the left side wall:
Risk of burns from the hot furnace
Warning against corro-
sive substances
¡On the front side, next to the
phosphoric acid bottle: Warning
against phosphoric acid
Warning against harm-
ful or irritating sub-
stances
¡On the front side: Warning
against phosphoric acid
Warning against crush-
ing
On the autosampler: There is a risk of
injury in the movement range of the
autosampler.
Hazardous substances are used during operation:
GHS labeling Meaning Comment
Corrosivity warning On the phosphoric acid bottle: Phos-
phoric acid is corrosive
Mandatory action
labels/information
symbols
Meaning Comment
Disconnect the power
supply before opening
the device cover.
On the side parts and the rear of the
device: Before opening the device
cover, switch off the device and dis-
connect the mains plug from the
mains socket.

multi N/C 2100S (duo, pharma) Security
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Mandatory action
labels/information
symbols
Meaning Comment
Observe the operating
manual
On the side parts and the rear of the
device: Before starting work, read the
user manual.
For People's Republic of
China only
The device contains controlled sub-
stances. Analytik Jena GmbH warrants
that these substances will not be re-
leased from the device within the next
25years provided the device is used as
intended.
2.2 Requirements for the operating personnel
The device must only be operated by qualified specialist personnel instructed in the
use of the device. This instruction also include teaching the contents of this user
manual and of the user manuals of the connected system components. We recom-
mend training by qualified employees of Analytik Jena or its representatives.
In addition to the safety instructions in this user manual, the general applicable
safety and accident prevention regulations of the respective country the device is op-
erated in must be observed and adhered to. The operator must ensure the latest ver-
sion of these regulations.
The user manual must be accessible to the operating and service personnel.
2.3 Safety instructions, transport and commissioning
Incorrect installation can create serious hazards. This may result in electric shock and
explosion if the gases are not connected correctly.
¡Only the Analytik Jena GmbH customer service or specialist personnel trained
and authorized by them is allowed to install and commission the device and its
system components.
¡Unauthorized assembly and installation is not permitted.
Insufficiently secured components pose a risk of injury.
¡During transport, secure the device components as specified in these operating
instructions.
¡Loose parts must be removed from the system components and packed sepa-
rately.
To prevent health damage, the following must be observed when moving the device
in the laboratory (lifting and carrying):
¡For safety reasons, two persons are required to transport the device who must
hold the unit by either side of the equipment.
¡The device does not have any carrying handles. Therefore the device must be
gripped firmly with both hands at the lower end.
¡Risk of damage to health due to improper decontamination! Perform a profes-
sional and documented decontamination of the device before returning it to An-
alytik Jena. The decontamination report is available from Service when register-
ing the return. Service must refuse acceptance of contaminated devices. The
sender may be liable for damage caused by inadequate decontamination of the
device.

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2.4 Safety instructions: during operation
2.4.1 Summary of safety instructions
The operator must make sure that the device and its safety equipment is in sound
condition each time before starting up the device. This applies in particular after
each modification or extension of the device or its repair.
Observe the following:
¡The device may only be operated if all items of protective equipment (e.g. covers
in front of electronic components) are in place, properly installed and fully oper-
ational.
¡The sound condition of the protection and safety equipment must be checked
regularly. Any defects must be corrected as soon as they occur.
¡Protective and safety equipment must never be removed, modified or switched
off during operation.
¡Always ensure free access to the main switch and to the emergency shutdown
switches and locks during operation.
¡The ventilation equipment on the device must be in good working condition.
Covered ventilation grilles or slots etc. may cause the device to break down or
may cause damage to it.
¡Modifications, conversions and extensions to the device are only permitted after
consultation with Analytik Jena. Unauthorized modifications can jeopardize the
device’s operational safety and may lead to limitations regarding the warranty
and access to customer service.
¡Keep all combustible materials away from the device.
¡The furnace operates at temperatures of 700to950°C. Do not touch the hot
components (furnace, condensation coil) during or directly after operation.
¡Caution when handling glass components. Risk of broken glass and therefore risk
of injury!
¡Ensure that no liquid enters the interior of the device, for example at cable con-
nections. There is a danger of electric shock.
¡There is a risk of injury in the movement range of the autosampler. For example,
hands or fingers may be crushed. Maintain a safety distance from the autosam-
pler during operation.
¡The optional chemiluminescence detector (CLD) contains an ozone generator
which produces ozone (O3). When used in accordance with the intended use, the
downstream ozone decomposer destroys the toxic gas. Various safety measures
result in the automatic shut-down of the ozone generator. However, the follow-
ing still applies: if you notice a strong smell of ozone, switch the device off imme-
diately and inform customer service. In order to guarantee perfect and safe oper-
ation, Analytik Jena recommends an annual inspection and maintenance of the
detector by customer service.
2.4.2 Safety instructions – protection against explosion and fire
The device may not be operated in an explosive environment.
Smoking or handling open flames are prohibited in the room in which the device is
operated!

multi N/C 2100S (duo, pharma) Security
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2.4.3 Electrical system safety instructions
Life-threatening electrical voltages occur in the device in the area of the right side
component! Contact with live components may cause death, serious injury or painful
electrical shock.
¡The power plug must be connected to a proper power outlet to ensure that the
device meets protection class I (ground connector). The device may only be con-
nected to power sources whose nominal voltage is the same as that on the rating
plate of the equipment. Do not replace the removable power cable of the device
with a power cable that does not meet the specifications (with no protective
ground conductor). Extensions of the supply cable are not permitted!
¡Work on the electronics may only be carried out by the customer service of Ana-
lytik Jena and specially authorized technicians.
¡The electrical components must be checked regularly by a qualified electrician.
Any defects such as loose connections or faulty or damaged cables must be re-
paired without delay.
¡Before opening the device, the device must be switched off via the main switch
and the power plug must be disconnected from the power outlet!
¡The basic module and the system components may only be connected to the
mains when they are switched off.
¡Electrical connection cables between the basic module and the system compo-
nents may only be connected or disconnected when the device is switched off.
¡Switch off the analyzer immediately using the main switch on the rear of the
housing if there is any malfunction of the electrical components. Disconnect the
power plug from the power socket.
2.4.4 Safety instructions for the operation of compressed gas containers and compressed gas
systems
¡The operating gases are taken from compressed gas containers or local com-
pressed gas systems. The operating gases must have the required purity.
¡Work on compressed gas containers and systems may only be carried out by indi-
viduals with specialist knowledge and experience in compressed gas systems.
¡Compressed air hoses and pressure reducers may only be used for the assigned
gases.
¡Pipes, hoses, screw connections and pressure reducers for oxygen must be kept
free from grease.
¡Check all pipes, hoses and screw connections regularly for leaks and externally
visible damage. Repair leaks and damage without delay.
¡Shut off the gas supply to the device prior to any maintenance and repair work
on the compressed gas containers.
¡After successful repair and maintenance of the components of the compressed
gas containers or system, the device must be checked for proper operation prior
to recommissioning.
¡Unauthorized assembly and installation are not permitted!
2.4.5 Handling of auxiliary and operating materials
The operator is responsible for the selection of substances used in the process as well
as for their safe handling. This is particularly important for radioactive, infectious,
poisonous, corrosive, combustible, explosive and otherwise dangerous substances.
When handling hazardous substances, the locally applicable safety instructions and
instructions in the safety data sheets from the manufacturers of the auxiliary and op-
erating materials must be complied with.

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¡Special care must be taken when handling concentrated acids. The regulations
and notes in the safety data sheets for the handling of orthophosphoric acid
(H3PO4) or hydrochloric acid (HCl) must be observed.
¡The catalyst supplied by the manufacturer should be handled with the usual cau-
tion when handling chemicals.
Observe the following instructions when working with quartz wool:
¡Only store quartz wool in closed containers.
¡When working with quartz wool, avoid the formation of dust! Inhaled dust may
cause irritation to respiratory pathways.
¡Wear personal protective equipment (laboratory coat, protective gloves, safety
goggles, respiratory mask) when replacing the quartz wool and when cleaning
the combustion tube.
¡Collect used quartz wool in suitable, sealed containers and dispose of the mate-
rial in accordance with applicable legal regulations. Contact the responsible
waste disposal company to organize the disposal of the waste.
Observe the following:
¡The operator is responsible for carrying out suitable decontamination should the
device become contaminated externally or internally with dangerous substances.
¡Splashes, drops or larger liquid spillages should be removed using an absorbent
material such as cotton wool, laboratory wipes or cellulose.
¡For biological contamination, wipe the affected area with a suitable disinfectant,
such as an Incidin Plus solution. Then wipe the cleaned areas so that they are
dry.
¡The only suitable cleaning method for the housing is wipe disinfection. If the dis-
infectant has a spray nozzle, apply disinfectant to a suitable cloth before using it
on the device.
Particular care must be taken if infectious materials are analyzed with the device,
as the device cannot be decontaminated as a single unit.
¡Before using a cleaning or decontamination procedure other than that pre-
scribed by the manufacturer, the user is required to check with the manufacturer
that the intended procedure will not damage the device. Safety labels attached
to the device must not have methanol applied.
2.4.6 Safety instructions – maintenance and repair
The device is generally maintained by the customer service department of Analytik
Jena or specialist personnel trained and authorized by them.
Unauthorized maintenance can damage the device. For this reason, only the activi-
ties described in the user manual in the "Maintenance and care" chapter may be per-
formed by the operator.
¡Only clean the exterior of the device with a slightly moistened, non-dripping
cloth. Use only water and, if required, customary surfactants.
¡All maintenance and repair work on the device must only be carried out when
the device is switched off (unless specified otherwise).
¡The gas supply must be shut off before performing any maintenance or repair
work (unless specified otherwise).
¡Allow the device to cool down before any maintenance work or replacement of
system components.
¡Use only original spare parts, wear parts and consumables. They have been
tested and ensure safe operation. Glass part are wear parts and are not subject
to the warranty.
¡All protective equipment must be reinstalled and checked for proper function
when the maintenance or repair work is complete.

multi N/C 2100S (duo, pharma) Security
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See also
2Maintenance and care [}65]
2.5 Behavior during emergencies
¡If there is no immediate risk of injury, switch off the device and the connected
system components immediately in hazardous situations or in the event of an
accident and/or disconnect the power plugs from the power outlets.
¡Close the gas supply as soon as possible after switching off the devices.

Function and design multi N/C 2100S (duo, pharma)
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3 Function and design
3.1 Layout
The analyzer is a compact table-top device with permanently installed main compo-
nents. Further accessories and reagents are required for the measurement process.
Control of the analyzer and analysis of the measurement data is performed via the mul-
tiWin software.
All components of the analyzer operated or serviced by the user can be accessed via the
two doors on the front, the left-hand removable side wall or the top cover.
The analyzer consists of the following main components:
¡Sample supply system
¡Gas box and hose system
¡Combustion system
¡Measuring gas drying and cleaning
¡Detector
¡Indicator and control elements, connections
¡Electronics
¡Accessories
Figure1 Analyzer, front doors opened
1 Phosphoric acid pump 2 LED displays
3 Reagent bottle for phosphoric acid 4 Drip tray
5 Condensate pump 6 Halogen trap
7 Water traps

multi N/C 2100S (duo, pharma) Function and design
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Figure2 Analyzer, left side wall opened
1 TIC condensation module (behind it:
condensation coil)
2 Combustion system
3 Gas box
Figure3 Sample supply system (on device top)
1 TC lock 2 Switch for opening the TC lock
3 TIC lock
3.1.1 Sample supply system
Septum lock A septum lock is used as a TIC lock. The septums normally used are temperature-resis-
tant and have a high puncture tolerance. The septum lock is included in the pharma
model, but it is not used.
Septum-free lock A septum-free lock is used as a TC lock. The TC lock is used for sample supply for TC and
TN analyses. The lock ensures high particle mobility and low carry-over. A pneumatically
driven folding mechanism provides entry into the combustion system.
During sample supply, no foreign substances may enter the analyzer. The sealing of the
system is achieved via a septum on the syringe.
During autosampler operation, the lock is actuated automatically. In manual operation,
the user must open and close the toggle switch to the left of the locks.

Function and design multi N/C 2100S (duo, pharma)
18
Switch positions:
¡TC lock closed: Switch set toward the front
¡TC lock opened: Switch set toward the rear
TC lock closedTC lock opened
Figure4 Toggle switch for manual operation of the TC lock
Microliter syringes Samples are supplied with microliter syringes. The injection volume is 50to500µl. Op-
timum measurement results are reached when 50to100% of the volume of the micro-
liter syringe is used. Various syringes are available. The canulas can be replaced.
For the analysis of particulate samples, the use of canulas with a larger inside diameter
(particle canula) is recommended.
Special microliter syringes with special geometry and a gas connection for NPOC analy-
ses are used for the autosamplers. The syringes have no graduation and are therefore
not suitable for manual operation.
3.1.2 Hose system
Hose diagram The connection between the individual components is made with labeled hoses. The
numbers and letters circled in the hose diagram correspond to the labels on the hoses in
the analyzer.
/Air Gas box + pneumatic unit
Needle valve 5/2-way valve
NPOC flow monitoring
NPOC connection
Sample
Cylinder TC lock
Furnace
Water traps
TIC condensate container + dryer
TIC lock
"waste" connection
Condensate pump
Phosphoric acid pump
Water traps
Halogen trap
Flow monitoring
Phosphoric acid
"CLD/pump" connection
NDIR detector
"analyte" connection
"internal" connection
11
12
15
5
6
1
2
21
16
17
22
3
14
19
18
14
13
O2
Figure5 Hose diagram

multi N/C 2100S (duo, pharma) Function and design
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Components for flow adjust-
ment
The analyzer automatically sets the carrier gas flow and controls the inlet flow via an
MFC (Mass Flow Controller). An MFM (Mass Flow Meter) measures the carrier gas flow
at the device outlet. This automatically checks for leaks. The results are displayed in the
multiWin software in the System state window. A water trap protects the gas box from
the return of wet combustion gases.
The NPOC purge flow can be set via the needle valve on the gas box. The needle valve
can only be accessed when the left side wall has been removed. The NPOC purge flow is
measured with an MFM and displayed in the System state window.
The needle valve for setting the NPOC purge flow is available in the multiN/
C2100Spharma analyzer, but it is not used.
Figure6 Setting the NPOC purge flow
Condensate pump The condensate pump pumps the condensate or the waste solution from TIC determina-
tion out automatically after each measurement. The condensate pump is located behind
the front doors next to the halogen trap.
Figure7 Condensate pump

Function and design multi N/C 2100S (duo, pharma)
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Phosphoric acid pump The phosphoric acid pump transports phosphoric acid (10 %) to the TIC condensate con-
tainer.
Figure8 Phosphoric acid pump
Connection method Inside the device, most gas connections have been implemented via FAST connectors
(FAST – Fast, Safe, Tight). These connectors provide a tight transition between the
hoses and connections with different diameters. The soft sleeves prevent the risk of
glass breakage in comparison to rigid screw connections. There are different connector
versions.
Figure9 FAST connector
So-called Fingertight screw connections are also used. These flangeless fittings consist
of a conical nipple and a banjo bolt. These hose connections seal purely by tightening
the plastic banjo bolt finger-tight.
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Figure10Fingertight screw connection
1 Hose 2 Banjo bolt
3 Conical nipple