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Máy phân tích COD trực tuyến CODG-3000
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Description
CODG-3000 ONLINE COD ANALYZER
CODG-3000 Online COD Analyzer use principle of the potassium dichromate method for measuring COD: the water sample, potassium dichromate, silver sulfate solution (the catalyst oxidizes the linear aromatic hydrocarbon compound more fully) and concentrated sulfuric acid are heated to 175 ° C in the digestion tank. During this period, the chromium ion is reduced as the oxidant from the VI valence to the III valence and the color is changed. The degree of color change corresponds to the content of the organic compound in the sample, and the instrument directly displays the COD of the sample by colorimetric conversion. The main interference of CODG-3000 potassium dichromate type Online COD Analyzer for wastewater cod detection is chloride, which can be removed by adding mercury sulfate to form a complex.
Standard
Water Quality– Chemical oxygen demand Measurement- Potassium dichromate
Measuring range
5-1500 mg/L;100~5000mg/L;500~15000mg/L COD;
Accuracy
≤±10% when ≥100mg/L; ≤±8mg/L when ＜100mg/L
Repeatability
≤±10% when ≥100mg/L; ≤±6mg/L when ＜100mg/L
Value error
≤±10% when ≥100mg/L; ≤±6mg/L when ＜100mg/L
Measurement period
The minimum measurement period is 35 minutes, according to the actual water sample, The digestion time can be modified from 10 to 120 minutes.
Sampling period
Time interval(55~9999min adjustable by yourself) and
Integral time measurement mode;
Calibration period
Adjustable in 1~99days;
Maintenance period
Usually one time per month and 30 minutes each time
Output
4~20mA( 2 ways) RS232,RS485
It should be indoor and temperature can be adjustable.The recommend temperature is +5~28℃;humidity≤90%(no dew)
Power
AC220±10% V，50±10% Hz，5 A;
Dimension size
Height 1450×Width510×Length 450 mm;
Data saved
The data can be saved when abnormal alarms and power off.
Display
Touch screen and Command Input
Other
When Reset after abnormal alarm and power on after off, the instrument automatically discharges residual reactants in the instrument and automatically resumes working status.
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