Xylem SI Analytics TO 7280 User manual

Gebrauchsanleitung................................................................................................. Seite 5…46
Wichtige Hinweise:
Die Gebrauchsanleitung ist Bestandteil des Produktes. Vor der ersten Inbetriebnahme bitte sorgfältig lesen,
beachten und anschließend aufbewahren. Aus Sicherheitsgründen darf das Produkt ausschließlich für die
beschriebenen Zwecke eingesetzt werden. Bitte beachten Sie auch die Gebrauchsanleitungen für eventuell
anzuschließende Geräte.
Alle in dieser Gebrauchsanleitung enthaltenen Angaben sind zum Zeitpunkt der Drucklegung gültige Daten.
Es können jedoch vom Hersteller sowohl aus technischen und kaufmännischen Gründen, als auch aus der
Notwendigkeit heraus, gesetzliche Bestimmungen verschiedener Länder zu berücksichtigen, Ergänzungen am
Produkt vorgenommen werden, ohne dass die beschriebenen Eigenschaften beeinflusst werden. Eine
möglicherweise aktuellere Version dieser Gebrauchsanleitung finden Sie auf unserer Webseite. Die deutsche
Fassung ist die Originalversion und in allen technischen Daten bindend!
Operating Manual..................................................................................................... Page 47 …90
Important notes:
The operating manual is part of the product. Before initial operation, please carefully read and observe the
operating manual and keep it. For safety reasons the product may only be used for the purposes described in
these present operating manual. Please also consider the operating manuals for the devices to be connected.
All specifications in this operating manual are guidance values which are valid at the time of printing. However,
for technical or commercial reasons or in the necessity to comply with the statuary stipulations of various
countries, the manufacturer may perform additions to the product without changing the described properties.
A potentially more recent version of this manual is available on our internet website. The German version is
the original version and binding in all specifications!

INHALTSVERZEICHNIS
1Technical Specifications of the Headspace Oven TO 7280
and the Sample Changer TW 7650........................................................................... 49
Notes to the operating manual................................................................................................ 491.1 Intended Use........................................................................................................................... 491.2 Technical Specifications.......................................................................................................... 501.3
1.3.1 Headspace Oven TO 7280 ..................................................................................................... 50
1.3.2 Sample Changer TW 7650...................................................................................................... 51
1.3.3 Titration stand TM 235 TO ...................................................................................................... 52
Warning and safety information .............................................................................................. 531.4
1.4.1 General.................................................................................................................................... 53
1.4.2 Warning signs.......................................................................................................................... 54
1.4.3 Chemical and biological safety................................................................................................ 54
1.4.4 Flammable liquids ................................................................................................................... 54
2Installation and Commissioning............................................................................. 55
Operating environment............................................................................................................ 552.1 Unpacking and setting up........................................................................................................ 552.2 Back panel of the TM 235 TO and the TitroLine®7500 KF trace............................................ 562.3 Installation of the TM 235 TO.................................................................................................. 572.4 Back panel of the TO 7280 ..................................................................................................... 632.5 Installation of the TO 7280...................................................................................................... 642.6 Installation of the TW 7650 ..................................................................................................... 672.7 Switching on the unit and initial conditioning .......................................................................... 692.8
3Working with the TO 780 and the TW 7650............................................................ 70
General.................................................................................................................................... 703.1
3.1.1 The vials and the crimping tool ............................................................................................... 70
3.1.2 The 0 –Vial............................................................................................................................. 71
3.1.3 The blank measurement ......................................................................................................... 71
Working with the TO 7280: Standalone .................................................................................. 723.2
3.2.1 Standard methods and method parameters of the TitroLine®7500 KF trace......................... 72
3.2.2 Initialization of the TO 7280 / TW 7650................................................................................... 75
3.2.3 Conditioning ............................................................................................................................ 75
3.2.4 Carrying out a sample measurement / blank measurement................................................... 77
3.2.5 Communication error with the oven ........................................................................................ 79
3.2.6 The oven service menu........................................................................................................... 80
Working with the TO 7280 / TW 7650 and TitriSoft ................................................................ 813.3
3.3.1 The titration command «Coulometer»..................................................................................... 81
3.3.2 Working with the TO 7280....................................................................................................... 82
3.3.3 Working with the TW 7650...................................................................................................... 85
3.3.4 Quick Access to the devices via TitriSoft................................................................................ 87
Error messages....................................................................................................................... 883.4
4Service and maintenance........................................................................................ 89
5Guarantee................................................................................................................. 90
6Storage and transportation..................................................................................... 90
7Recycling and Disposal........................................................................................... 90
8EC –Declaration of Conformity.............................................................................. 90
Version 211015 US

Copyright
© 2021, Xylem Analytics Germany GmbH
Reprinting - even as excerpts - is only allowed with the explicit written authorization.
Germany. Printed in Germany.

49
1 Technical Specifications of the Headspace Oven TO 7280 and the
Sample Changer TW 7650
Notes to the operating manual1.1
The provided operating manual will allow you the proper and safe handling of the product. For maximum security,
observe the safety and warning instructions in the operating manual!
Warning of a general danger:
Non-compliance results (can result) in injury or material damage.
Important information for device use.
Refers to another part of the operating manual.
The menu screens shown in this operating manual serve as an example and may differ from what you see!
Intended Use
1.2
The Karl Fischer oven TO 7280 is a Headspace oven, used in conjunction with a coulometric titrator
TitroLine®7500 KF trace for water determination by the bake-out method.
Der TO 7280 can be used semi-automatically as a stand-alone instrument as well as fully automatically in
combination with a Karl Fischer sample changer TW 7650.
The TW 7650 allows serial titrations with automatic sample change to be carried out in combination with the
TO 7280. The titrations are carried out in a sealed sample vessel (vial) which is placed in the sample tray. The
sample changer is controlled directly by the TO 7280. The TW 7650 has an easily exchangeable round sample
plate.
The titration stand TM 235 TO includes a pump and a stirrer. It is used to hold the titration vessel in which the Karl
Fischer titration actually takes place. By means of the pump, a volume flow is generated which flushes the liquid
evaporating during the heating of the sample in the TO 7280 through the titration vessel and thus triggers a
chemical reaction.
Solutions to be used:
Special coulometric reagents developed for combination with an oven are recommended.
The Karl Fischer oven is not intended for use with potentially biohazardous substances.
Do not use the device in hazardous locations!
General:
The safety guidelines that are applicable to the handling of chemicals have to be observed under all
circumstances. This applies in particular to inflammable and/or etching liquids.

50
Technical Specifications1.3
1.3.1 Headspace Oven TO 7280
Translation of the legally binding German version (Release: 22. April 2021)
EMC compatibility according to the Council Directive: 2014/30/EU;
applied harmonized standards: EN 61326-1
Low-voltage directive according to the Council Directive 2014/35/EU;
Testing basis EN 61 010-1: for laboratory equipment
RoHS Council Directive 2011/65/EU
Country of origin: Germany, Made in Germany
Measuring range: (μg water absolute) in combination with a TitroLine®7500 KF trace Coulometer:
Measuring range
Resolution [µg]
Reproducibility
1 µg …200 mg
0.1
+/- 0.3 g at 10 –1000µg
0.3 % at > 1000 µg
Temperature range:
40 °C … 280 °C (isotherm)
Power supply:by external multi-range power supply from 115 –230 V, 50/60 Hz
Input voltage: 24 Volt DC, 11000 mA
Power consumption 250 W
Corresponds to protection class III:
Only use the power supply included in the scope of delivery or a power supply
approved by the manufacturer!
Display: 3 colored LED display (blue/red/green).
Operating states, error states and operating faults are signaled by color signals
and flashing codes
RS-232-C Interface:
Daisy chain function available
RS-232-1 for connection to a titrator, Daisy Chain input
Data bits: fixed 8Bit
Stop bit: fixed 1Bit
Parity: fixed no
Baud rate: fixed 4800 Baud
Address: fixed 3
RS-232-2 for connection of balances, Daisy Chain output
Data bit: configurable, 7 or 8Bit (Default Wert 8 Bit)
Stop bit: fixed 1Bit
Parity: configurable: even / odd / no (Default no)
Baud rate: configurable: 1200, 2400, 4800, 9600, 19200, 38400 (Default 4800 Baud)
Housing:
Material: Powder coated aluminum, steel, stainless steel
Dimensions: 30 x 45 x 24 cm (W x H x D)
Weight: approx. 7 kg for basic unit without titrator and titration stand TM 235 TO

51
Ambient conditions:
Do not use the device in hazardous locations!
Climate: Ambient temperature: + 10 ... + 40 °C for operation and storage
Humidity according to EN 61 010, Part 1:
Max. relative humidity 80 % for temperatures up to 31 °C,
linear decrease down to 50 % relative humidity at a temperature of 40 °C
Altitude: Sample changer: No restrictions
Power supply: up to 5000 m
Pollution degree: Pollution degree IP 20, indoor use only.
1.3.2 Sample Changer TW 7650
Translation of the legally binding German version (Release: 22. April 2021)
In combination with the headspace Oven TO 7280
EMC compatibility according to the Council Directive: 2014/30/EU;
applied harmonized standards: EN 61326-1: 2013
Low-voltage directive according to the Council Directive 2014/35/EU;
Testing basis EN 61 010-1: 2010 for laboratory equipment
RoHS Council Directive 2011/65/EU
FCC Part 15B and ICES 003
Country of origin: Germany, Made in Germany
Number of positions:
1 x 0 –Vial + 49 sample positions
Power supply:
Supply directly via the headspace Oven TO 7280
Housing:
Dimensions: 42 x 45 x 46 cm (W x H x D) incl. TO 7280
Weight: approx. 10 kg without TO 7280
Ambient conditions:
Do not use the device in hazardous locations!
Climate: Ambient temperature: + 10 ... + 40 °C for operation and storage
Humidity according to EN 61 010, Part 1:
Max. relative humidity 80 % for temperatures up to 31 °C,
linear decrease down to 50 % relative humidity at a temperature of 40 °C
Altitude: Sample changer: No restrictions
Power supply: up to 5000 m
Pollution degree: Pollution degree IP 20, indoor use only.

52
1.3.3 Titration stand TM 235 TO
Translation of the legally binding German version (Release: 22. April 2021)
In combination with the titrator TitroLine®7500 KF trace
EMC compatibility according to the Council Directive: 2014/30/EU;
applied harmonized standards: EN 61326-1
Low-voltage directive according to the Council Directive 2014/35/EU;
Testing basis EN 61 010-1: for laboratory equipment
RoHS Council Directive 2011/65/EU
Country of origin: Germany, Made in Germany
Pump: Free flow rate - air externally adjustable between 50 …500 ml / min
Maximum pressure: 1.5 bar
Valve: Automatically switchable valve for switching between air and gas flow
Control: Via USB connection of the titrator TitroLine®7500 KF trace
Stirring Speed: 50 ... 1000 U/min, adjustable via a control dial
Gas flow meter: Adjustable between 50 … 500 ml / min
Connections
Power supply: Low voltage input 12 V / on the backside of titration stand
Plug connection: plug for low voltage connection –phone jack-,
Positive pole at pin contact, inside contact = 2.1 mm, USA/Japan,
Power supply via titrator TitroLine®7500 KF trace
USB: For connection to the TitroLine®7500 KF trace (see control unit)
Housing:
Material: Polypropylen
Dimensions: 8 x 13 x 25 cm (W x H x D), Height without stand, bottle and titration vessel
Weight: ca. 1.9 kg
Ambient conditions:
Not suitable for use in explosive environments!
Climate: Ambient temperature: + 10 ... + 40 °C for operation and storage
Humidity according to EN 61 010, Part 1:
Max. relative humidity 80 % for temperatures up to 31 °C,
linear decrease down to 50 % relative humidity at a temperature of 40 °C
Altitude: No restrictions
Pollution degree: Pollution degree IP 20, indoor use only.

53
Warning and safety information1.4
1.4.1 General
The devices corresponds to protection class III.
The are manufactured and tested according to EN 61 010 - 1, Part 1 „Protective Measures for electronic
measurement devices“and control devices and have left the factory in an impeccable condition as concerns
safety technology. In order to maintain this condition and to ensure safe operation, the user should observe the
notes and warning information contained in the present operating instructions. Development and production is
done within a system which meets the requirements laid down in the Norm DIN EN ISO 9001 standard.
For reasons of safety, the devices have only be used for the range of application described in the present
operating manual. Nonobservance of the intended proper use of the device may result in personal injury or
damage to property.
For reasons of safety, the devices and the power supply must be opened by authorised persons only; this
means, for instance, that work on electrical equipment must only be performed by qualified specialists. In case
of nonobservance of these provisions the devices and the power supply may constitute a danger:
electrical accidents of persons or fire hazard! Moreover, in the case of unauthorised intervention in the
devices or the power supply, as well as in the case of negligently or deliberately caused damage, the warranty
will become void.
Prior to switching the devices on it has to be ensured that the operating voltage matches the mains
voltage. The operating voltage is indicated on the specification plate (underside of the devices and backside of
the power supply). Nonobservance of this provision may result in damage to the devices and the power
supply, or in personal injury or damage to property!
If the plate rotates, the titration head moves or the horizontal axis moves, the operating display will light up red.
In this state, the sample changer must not be touched and no sample vessels must be removed or adjusted.
If it has to be assumed that safe operation is impossible, the device has to be put out of operation
and secured against inadvertent putting to operation. In this case please switch the device off, pull plug of
the mains cable out of the power supply, and remove the device from the place of work.
Examples for the assumption that a safe operation is no longer possible,
if the package is damaged,
if the device shows visible damages,
if the power supply shows visible damages,
if the device does not function properly,
if liquid has penetrated into the casing,
if the device has been altered technologically or if unauthorized personnel tried or succeeded to open the
device as attempt to repair it.
In case that the user operates such a device, all thereof resulting risks are on the user!
The Karl Fischer oven TO 7280 is equipped with integrated circuits (EPROMs). X rays or other high energy
radiation may penetrate through the device’s casing and delete the program
The devices have not be stored or operated in humid rooms.

54
1.4.2 Warning signs
Observe all labels and signs attached to the devices. Non-observance may result in personal injury or
damage to the devices!
Danger of hand injuries!
Hot surface. Risk of burns!
1.4.3 Chemical and biological safety
The relevant regulations regarding the handling of the substances used have to be observed: The
Decree on Hazardous Matters, the Chemicals Act, and the rules and information of the chemicals trade. On
the part of the user it has to be ensured that the persons entrusted with the use of the unit are experts in the
handling of substances used in the devices or that they are supervised by specialized persons, respectively.
When using biohazardous substances, the regulations for handling the substances used must be
observed. In such cases, the use is the sole responsibility of the user.
For all work with chemicals: Always wear protective glasses! Please observe the memorandums of the
employer's liability insurance associations and the safety data sheets of the manufacturers.
Dispose of all used solutions in accordance with national regulations and laws. Select the type of
protective equipment according to the concentration and quantity of the hazardous substance at the respective
workplace.
1.4.4 Flammable liquids
When handling flammable liquids, make sure that there is no naked flame in the vicinity of the equipment.
Adequate ventilation must be provided.
Only small quantities of flammable liquids should be kept in the workplace.
When working with liquids that do not correspond to common reagents, particular attention must be paid to
the chemical resistance of the materials of the devices (vgl. 1.3 Technical Specifications)

55
2 Installation and Commissioning
Operating environment2.1
Observe the following points to ensure that the device functions properly and has a long service life.
The ambient temperature must be10 to 40 °C.
The relative humidity must be below 80 % (without condensation).
The titration head of the sample changer must be able to move freely.
Do not use or store the device in dusty, damp or wet places.
Make sure that no liquids can get into the device and wipe off any liquids on the device immediately.
Protect the device from vibrations, direct sunlight, corrosive gases and strong magnetic and/or electric
fields.
Use only original spare parts and accessories.
Unpacking and setting up
2.2
The devices have been individually assembled for you, therefore there may be deviations with regard to the
described scope of delivery and the accessories. Please refer to the enclosed packing list for the exact scope of
delivery. If you have any questions, please contact us directly (for the service address, see backside of this
operating manual).
The devices and all accessories as well as the peripheral devices have been carefully checked at the factory for
function and dimensional accuracy. Please ensure that even the small additional parts are removed from the
packaging without leaving any residue.
The units can be set up on any flat surface. Do not push any objects under the devices.
For the operation of the TO 7280 / TW 7650 an additional coulometer module TitroLine®7500 KF trace is
necessary. The TitroLine®7500 KF trace is already included in the scope of delivery of the TM 235 TO M6.
For the scope of delivery of the TitroLine®7500 KF trace see the according operating manual.

56
Back panel of the TM 235 TO and the TitroLine®7500 KF trace2.3
Fig. 1
The TM 235 TO is equipped with the following connections (Fig. 1):
1) Gas inlet when using the internal pump and ambient air as carrier gas
2) Connection of a gas cylinder when using nitrogen as carrier gas
3) Gas outlet for connection to the TO 7280
4) Power supply of the TM 235 TO
5) USB-B connection
The TitroLine®7500 KF trace is equipped with the following connections (Fig. 1):
6) Connection of the generator electrode TZ 1752
7) Connection of the indicator electrode KF 1100
Two RS-232 ports (Mini-DIN):
8) RS-1 for connection to the PC
9) RS 2 for connection of the TO 7280 / TW 7650
10) Connection for power supply of the TM 235 TO
6
7
8
9
10
1
2
3
4
5

57
Installation of the TM 235 TO2.4
Set up the TM 235 TO o the left or right of the unit (between the titrator and the oven) (Fig. 2).
Fig. 2
Connect the TM 235 TO to the rear of the unit (12 V socket “out”) with the connection cable TZ 1577 (Fig. 3).
To control the TM 235 TO, it must also be connected to the titrator via USB (Fig. 4).
Fig. 3
Fig. 4

58
The USB connection of the TM 235 TO must be made directly at the titrator and not via an intermediate USB
hub. For additional accessories such as keyboard, USB stick or printer, an additional USB hub (TZ 3830) is
recommended.
The carrier gas can be either ambient air dried via a molecular sieve or an externally connected gas cylinder
(nitrogen). The following pictures show an example of the use of the gas inlet. Nitrogen is used in the same way
via the gas inlet (see. Fig. 1).
The safety regulations for handling gas and pressurized gas cylinders must be observed!
When using ambient air, a connecting hose with dust particle filter TZ 3995 (Fig. 5) is attached (screwed) to the
gas inlet (Fig. 6).
Fig. 5
Fig. 6
Then screw the stand rod into the thread of the titration stand (Fig. 7).
Fig. 7

59
The scope of delivery includes a holder for the titration vessel (supplied with the coulometer) and a holder for the
two drying bottles of the carrier gas (Fig. 8). These are connected to each other via the recess on the bottle
holder and the lug on the side of the titration vessel holder (Fig. 9).
Fig. 8
Fig. 9
The two holders can now be pushed onto the previously mounted stand rod (Fig. 10).
Fig. 10

60
The drying bottles (Fig. 11) preassembled with hoses and filled with molecular sieve are placed in the holder
(Fig. 12 and Fig. 13). The free shorter hose (1) is connected to the outlet of the pump. The longer hose (2) is
used for subsequent connection to the flow meter.
Fig. 11
Fig. 12
Fig. 13
1
2
1
2
1
2

61
The titration cell is inserted into the holder (Fig. 14):
Fig. 14
The generator electrode is inserted into the rear NS 14.5 opening and connected to the titrator (Fig. 15).
The double platinum electrode is also inserted into the rear NS 7.5 (Fig. 16) opening and connected to the titrator
(for the connection of the electrodes, see the respective operating manual).
Fig. 15
Fig. 16

62
The gas inlet tip is placed in the front right NS 14.5 opening (Fig. 17). The front left NS 14.5 opening is used to fill
the titration vessel and is then closed with a gas plug after adding the stirring bar (Fig. 18).
Fig. 17
Fig. 18

63
Back panel of the TO 72802.5
Fig. 19
The TO 7280 is equipped with the following connections (Fig. 19):
1) Power supply for connecting the supplied mains adapter
2) Main switch for switching on the oven
Two RS-232 ports (Mini-DIN):
3) RS-2 (bottom) for connection to a balance
4) RS-1 (top) for connection to the titrator
5) I/O –Port for connecting optional accessories
1
2
3
4
5

64
Installation of the TO 72802.6
Place the KF Headspace oven TO 7280 to the left or right of the TM 235 TO.
The RS 1 of the oven (Fig. 20) is connected to the RS 2 of the titrator using the TZ 3094 (Fig. 21) cable included
in the delivery.
Fig. 20
Fig. 21
The flow meter (Fig. 22) is screwed onto the bracket (Fig. 23).
Fig. 22