Technical Specifications

1. Method basis: Potassium persulfate spectrophotometric method.

2. Measurement range: 0–200 mg/L total nitrogen (with ranges of 0–10 mg/L, 0.5–50 mg/L, and 1–200 mg/L).

3. Accuracy: not exceeding ±10% or not exceeding ±3% FS.

4. Repeatability: not more than ±5% or not more than ±2% of full scale.

5. Measurement cycle: The minimum measurement cycle is 25 minutes.

6. Sampling period: adjustable time interval (10–9,999 minutes) and on-the-hour measurement mode.

7. Calibration cycle: Regular manual calibration; no automatic calibration function.

8. Maintenance Schedule: Typically once a month, with each session lasting approximately 30 minutes.

9. Reagent consumption: less than 0.50 yuan per sample.

10. Outputs: 2 RS-232 channels; 1 channel 4–20 mA.

11. Environmental Requirements: Indoor environment with adjustable temperature; recommended temperature range: +5 to 28°C; relative humidity ≤ 90% (no condensation).

12. Power supply: AC 230 ±10% V, 50 ±10% Hz, 5 A.