COD Chromium Method Online CODG-3000

Instrument Features
The unique design makes this product have lower failure rate, lower maintenance, lower reagent consumption and higher cost performance than similar products.
Select valve assembly: select the reagent sampling sequence, the channels are flexible and diverse, the functions are changeable, and it has the advantages of minimum dead volume, easy maintenance and long life.
Micro metering component: The precise metering of reagents is realized through the visual photoelectric system, which overcomes the quantitative error caused by the wear of the peristaltic pump tube; at the same time, the precise quantification of micro-reagents is realized, and each dose is only 1 ml, which greatly reduces the use of reagents quantity.
Injection components: peristaltic pump sucks in negative pressure, and there is always an air buffer between the reagent and the pump tube, which avoids the corrosion of the pump tube; at the same time, it makes the reagent mixing more concise and flexible.
Sealed digestion components: The high temperature and high pressure digestion system speeds up the reaction process and overcomes the corrosion of equipment caused by the volatilization of corrosive gases in the open system.
Reagent tube: The imported modified PTFE transparent hose is used, and the diameter of the tube is greater than 1.5mm , which reduces the probability of water sample particle blockage.

Technical parameter
Method basis: National standard GB11914-89 “Water Quality – Determination of Chemical Oxygen Consumption – Potassium Dichromate”.
Measuring range: 0-6000 mg/L COD .
Accuracy : ≥100mg/L , it does not exceed ±10% ; 100mg/L , it does not exceed ±8mg/L .
Measurement period: The minimum measurement period is 20 minutes. According to the actual water sample, the 5 and 120 minutes digestion time can be arbitrarily modified
Sampling period: time interval ( 20 to 9999min ) and whole-point measurement mode.
Calibration period: 1 ~ 99 days, adjustable at any time at any interval.
Maintenance cycle: generally once a month, about 30 minutes .
Output: RS-232 or 4-20mA (optional).
Environmental requirements: indoor temperature adjustable, recommended temperature +5 ~ 28 ℃ ; humidity ≤ 90% (no condensation).
Power supply: AC230±10%V , 50±10%Hz , 5A .
Dimensions : height 1500 × width 550 × depth 450 ( mm ).
Others : Abnormal alarm and power failure will not lose data;
Touch screen display and command input; After abnormal reset and power failure, the instrument automatically discharges the residual reactants in the instrument and automatically returns to the working state.