LABBOX KJD20, User Manual, Page: 5 / 21

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3. Guidance for Waste Disposal
It is not allowed to discard the electronic devices together with non-classified general waste. Improper
disposal will produce damage to the environment and human health. Please refer to the local waste
disposal regulations for collection and disposal of the equipment.
4. Quality Guarantee Policy
The quality guarantee is generally specified in the purchasing order or contract, and is only
applicable to:
· The user shall abide by all written explanations and documents of manufacturer.
· The equipment shall be installed, maintained, adjusted and calibrated according to the methods
described and recommended in the documents.
· The equipment is not used for other purposes beyond those specified by manufacturer.
· The equipment is not refitted or repaired with spare parts which are not from the manufacturer and
is not repaired by personnel authorized by the manufacturer.
· Only use the accessories and consumables provided by manufacturer from the source recommended
by manufacturer.
· The equipment can't be operated according to the way which is inconsistent with the ordinary
practice.
· Only software authorized by manufacturer can be installed in the PC of the equipment.
· Use the external PC meeting the requirements recommended by manufacturer.
· The equipment shall conduct the correct maintenance according to the requirements recommended by
manufacturer.
· The equipment contains some quick-wear parts, and these spare parts can be inquired in the user's
manual and user's guide.
· The quality guarantee responsibility of quick-wear parts is only limited to the damage caused by the
material defects or production problem.
II. Introduction
1. Application
The Kjeldahl method is the classical method of nitrogen and protein determination. Currently, Kjeldahl Distillation
Unit plays an important role in determining the nitrogen and protein contents of soil, food, agricultural products
etc. Kjeldahl Distillation Unit can be widely used in areas of food processing, feeding stuff production, tobacco,
farming, soil fertilizer, environment monitoring, agriculture, scientific research, education, and quality control and
so on, performing either the nitrogen and protein analysis to macro and semi-micro samples, or tests of
ammonium salt and volatile fatty acid/alkali etc.
There are three processes including digestion, distillation and titration when Kjeldahl method is adopted to test
samples. The distillation is the main determining process used in Kjeldahl Distillation Unit, which is an automatic
distillation system designed according to the classical Kjeldahl method. This Kjeldahl Distillation Unit provides the
lab staff with a great convenience in measuring the content of nitrogen and protein, owning features such as high
reliability, uncompromised safety, hassle-free operation and time and energy-saving performance etc. The user-
friendly interface written in English is easy to operate and can display the sufficient information, making users
easily understand how to handle the Kjeldahl Distillation Unit.