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Home / Instruments & Automation / Water Quality / COD Measurement / COD Online Monitor-COD Online Tester QZ3000
COD Online Monitor-COD Online Tester QZ3000
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Shanghai Kuosi Electronic Co., Ltd.
Shanghai, China
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model 
 QZ3000 
 Method basis 
 Standard GB11914-89 "Water Quality-Determination of Chemical Oxygen Consumption-Dichromate Method" 
Measuring range 
 10～2000mg/L 
 Accuracy 
 Indication error≤±10% 
repeatability error 
 â‰¤Â±10% 
Measurement period 
 The minimum measurement period is 40min, and the digestion time can be arbitrarily modified within 5~120min according to the actual water sample. 
 The sampling period 
 Time interval (20~9999min can be adjusted arbitrarily) and whole point measurement mode 
 Correction 
 The instrument can periodically perform sensitivity and zero calibration 
Calibration cycle 
 Adjustable at any interval from 1 to 99 days at any time 
maintenance cycle 
 Usually once a month, about 30min each time 
 Analog output 
 2 channels 4~20mA 
 Signal interface 
 RS232 or RS485 communication interface 
 Switch 
 6 groups of relay control, capacity 220VAC/2A 
Comparison of actual water samples 
 Error≤±10% 
 MTBF 
 â‰¥720h/time 
Environmental requirements 
 Recommended temperature +5~28℃; humidity≤90% (no condensation) 
 size 
 Height 1500 × Width 550 × Depth 450 (mm) 
 power supply 
 AC220±10%V, 50±10%Hz, 5A 
 other 
 Abnormal alarm and power failure will not lose data; touch screen display and command input; 
 After an abnormal reset and power failure, the instrument automatically discharges the residual reactant in the device and automatically restores the working state 

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