XT-IV total nitrogen online automatic water quality analyzer

Technical specifications

• Method: sulfuric acidpersulfate oxidation UV spectrophotometry; water quality total nitrogen determination alkaline sulfuric acidpotassium persulfate digestion UV spectrophotometry (HJ 636—2012)《total nitrogenautomatic water quality analyzertechnical requirements》(HJ/T 102-2003), 《water qualitytotal nitrogenonlineanalyzer operating instruction(reference《water quality total nitrogenonlineanalyzer requirements and test method》)》(CNEMC-03-ZJZX-005-2023).
• Measuring range:  0 mg/L–20mg/L, 0 mg/L–50mg/L, 0 mg/L–100 mg/L, 0 mg/L–200 mg/L, 0 mg/L–500mg/L(rangeexpandable).
• Repeatability: ≤ ±2%.
• 24h 20%rangeupper limit: 0.05mg/L; 24h 80%rangeupper limit± 1%.
• indicationerror ± 10 %.
• linearity: ≤ ±10%.
• limit of quantitation: ≤ 0.30 mg/L.
• memory effect: standard solution80%→20%≤±0.40mg/L; standard solution20%→80%≤±0.80mg/L.
• voltage influence: ≤ ±5%.
• Ambient temperatureinfluence: ≤ ±5%.
• real-sample comparison: real sampletotal nitrogen<2 mg/L (concentration1.5 mg/L Standardsamplereplacereal sampleperform test)± 0.2 mg/L; real sampletotal nitrogen≥2 mg/L, ≤ ± 10 %.
• data validity: ≥90%.
• consistency: ≥90%.
• waste-liquid separation Functions.
• standard-solution check Functions.
• spike recovery Functions.
• fault reset and power restoration, the analyzer automatically discharges residual reagents, automatic cleaning, automatically resets to restart the test Functions.
• alarms and power loss do not cause data loss.
• outputretained sample, triggered sampling Functions.
• reagent-low alarm, component-fault alarm, sample-fault, over-limit and other alarms Functions.
• touchscreendisplay and command input.
• sampling cycle: time interval(10 min–9999 minfreely adjustable) and on the hourmeasurementmode.
• calibration interval: 1–99adjustable to any interval and time of day, automatic calibration, automatic calibration.
• data storage: savedata storagemore than 10 years, historical records can be recalled at any time.
• output: 1-channel national-standard 212 RS-232, 1-channel Mod-Bus RS-232(RS-485), 1-channel 4 –20 mA.
• Power supply: AC220±10% V, 50±10% Hz, 5 A.
• dimensions: 1500 mm×500 mm×450mm(×× D).
• environmentrequirements: Ambient temperature: 5℃–40℃; temperatureadjustable indoor, recommendedtemperature25 ℃–28 ℃; humidity≤90% RH(non-condensing).