Description

Features:

• Adopt microcomputer controlling process; include manual mode and automatic mode. Can be set and switched according to user’s need.
• Large array LCD display, touch key, easy to operate.
• Automatically control distill, add water, control water level are cut off water supply.
• Various security protections: digestive system security device, steam generator water shortage alarm, water level detection fault alarm.
• Stored operation procedure quantity: 250
• Instrument shell adopts specially made plastic spray steel. Working area adopts ABS anticorrosive board, Avoid chemical reagent corrosion and mechanical surface damage, acid proof and alkali proof.
• Once detected fault, controlling system will power off automatically.

Measuring principle steps of the auto-meter are shown as follows:

Sampling – Assimilation – Distillation – Titration – Calculation

Technical Specifications:

KDN Series Semi-automatic Kjeldahl Nitrogen Analyzer

Main technical parameters:

2.1 Measure variety: foodstuff, feedstuff, foods, dairy products, drink, soil, water, medicine, precipitate, chemical.                                                                                                                                                                                     2.2 Working mode: semi-automatic                                                                                                                                    2.3 Measure quantity: digest 4~20 pieces of tubes at the same time, adopt single distillation.                                     2.4 Measure range: 0.1~200mgN (nitrogen content 0.1%-99%).                                                                                   2.5 Recovery rate: ≥99% (relative error, include digestion process)                                                                              2.6 Repetition rate: relative standard deviation<±1%                                                                                                       2.7 Working hours: digestion time: 40-90 minutes, distillation time: 5-15 minutes. (According to different samples, time required is also different.)                                                                                                                           2.8 Voltage: AC 220V/50HZ                                                                                                                                                    2.9 Cooling water consumption: digestion: 5L/min

Measure principle steps of the instrument are shown as follows (Kjeldahl nitrogen determination principle)

Sampling – Digestion – Distillation – Titration – Calculation

The instrument is composed of digestion furnace (different types for selecting) and azotometer distillatory. The digestion furnace (numeric display model) is controlled by temperature control meter. It adopts infrared radiation heating. Insert the sample into the heating furnace to get the best heating effect. Through the drainpipe and the air-bleed three-way, poisonous gases (e.g. SO2) emitted from the digestion tube could be taken to the cloaca by water (the gases could also be recycled by vacuum pump and recycle bottle) which could control the emitting of poisonous gases and save the installation of ventilated case. Samples could be digested thoroughly in about 40-90 minutes (according to the amount of nitrogen).

Distillation: 3L/min (Water temperature is less than 20°C)

2.10 Power: digestion: 4 holes—1000W, 8 holes—1500W, 20 holes—2000W Distillation: 1000W                          2.11 digestion tube capacity: 300m