Method basis: National standard GB11894-89 "Water quality - Determination of total nitrogen - UV spectrophotometric method》.

2 Measurement range:0100mg/LTotal nitrogen (graded)0-1mg/L；0.1-30mg/L；1-50mg/L； 1-100mg/L）.

3 Accuracy:Not exceeding±10%Or not exceeding±0.2mg/L.

4 Repeatability:Not exceeding±5%Or not exceeding±0.2mg/L.

5 measurement cycles: The minimum measurement cycle is 20 minutes, and according to the actual water sample, the digestion time can be arbitrarily modified within 5-120 minutes.

6 sampling periods: time interval (adjustable from 10 to 9999 minutes) and whole point measurement mode.

Calibration cycle: 1 to 99 days, adjustable at any interval and time.

8 Maintenance cycle: Generally once a month, about 30 minutes each time.

9. Reagent consumption: less than 0.5 yuan/sample.

10 outputs: 2roadRS-232。1road 4～20mA

11 Environmental requirements: For indoor environments with adjustable temperature, it is recommended to have a temperature range of+5-28 ℃; Humidity ≤ 90% (non condensing).

12 Power supply: AC230 ± 10% V, 50 ± 10% Hz, 5A.

Size 13: Height 1450 x Width 510 x Depth 450mm.

14 Other: Abnormal alarms and power outages will not result in data loss;

Touch screen display and command input;

After abnormal reset and power failure, the instrument will automatically discharge residual reactants and restore working status.