PCM300-CODcr Chrome COD Online Analyzer
Principle of Measurement
Under certain conditions, the water sample is added with a mixture of potassium dichromate and sulfuric acid, and reacted in the digestion tank to oxidize the organic reducing substance in the water sample. During the reaction, Cr6+ is reduced to Cr3+, which causes the color change of the mixed liquid. The colorimeter detects the color change of the mixed sample and calculates the potassium dichromate consumption, which is finally converted into the oxygen content required for the redox reaction, which is the chemical oxygen demand of the water sample to be tested.
l Ten-port valve with sapphire core, high wear resistance, strong acid and alkali resistance, organic solvent resistance, strong service life and high stability;
l The syringe pump is used for precise quantification, the water sample and reagent are more stable and accurate to ensure the measurement accuracy.
l Using a specially designed reference method, the slight displacement of the digestion tank and the slight pollution of the digestion tank will not affect the measured value;
l With waste liquid separation function, to achieve the separation of high-concentration reaction waste liquid and low-concentration cleaning waste liquid;
l With automatic dilution function, can automatically adjust the range file according to the actual water quality on site;
l With standard recovery, zero point verification, standard sample verification, parallel sample test function, ect., and it can be started automatically, manually, remotely, etc.;
l With automatic fault diagnosis and abnormal information upload and recording functions, such as parts failure, over-range alarm, over-standard alarm, lack of reagent alarm and other information;
l With overheating protection: the heating temperature is too high, the heater is automatically powered off;
l After abnormal reset and power failure, the instrument automatically discharges the residual reactants in the instrument and automatically restores to the original working state. With power-on alarm function, the instrument will generate alarm information when power is turned on again after power-off;
l With analysis instrument process log and measurement data recording and alarm information storage function, data calculation is recorded once every hour, can be stored for 3 years, and U disk can quickly export data;
l With three-level management authority;
l CODcr on-line monitoring of municipal sewage import and export, pollution source discharge, and industrial wastewater export.
7 inch display, operation interface
Period measurement (adjustable from 1h to 30d), whole point measurement mode, external trigger mode optional
Manual calibration or automatic calibration
General once a month
Temperature adjustable room, recommended temperature +5～40℃
Humidity ≤85% (no condensation)