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1
Technical Specifications of the Headspace Oven TO 7280 and the
Sample Changer TW 7650
1.1
Notes to the operating manual
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!
1.2
Intended Use
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.
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