Hexavalent chromium automatic monitor

1.Principle ofhexavalent chromium automatic monitor

The principle of the hexavalent chromium automatic monitor is that in an acidic solution, hexavalent chromium compound ions react with (DPC) to form a purple-red compound, which is measured spectrophotometrically at a specific wavelength. The above steps are automatically controlled by the online monitor and are introduced from the water sample. to the entire concentration calculation process, thereby realizing the automation of hexavalent chromium monitoring. This product is measured using the diphenylcarbazide spectrophotometric colorimetric method. After the water sample is mixed with the regulator, hexavalent chromium reacts with the indicator in an acidic environment and in the presence of the indicator to form a colored complex. The analyzer detects this color change and converts this change into a hexavalent chromium value and outputs it. The amount of colored complex generated is equivalent to the amount of hexavalent chromium.

2. Product features of hexavalent chromium automatic monitor

The new photoelectric quantitative technology is not affected by interference such as large chroma, suspended solids, and bubbles. It has high reliability, accuracy, and strong anti-interference ability.

The detection accuracy is high, the lower limit of measurement is low, and the long-term drift of the instrument is small.

It has one-click self-test function and self-diagnosis function.

Using a single-channel highly integrated valve group, maintenance and cleaning are simple and fast.

All-weather networking function allows you to monitor the operating status of the instrument anytime and anywhere.

It has alarm function, quality control function and reverse control function.

Equipped with automatic cleaning function and automatic calibration function.

Equipped with whole point measurement, interval measurement and external control measurement.

It will work automatically after power failure and recovery.

Automatic prompts and automatic reset functions for faults and lack of reagents (samples).

With fault recording function.

Can save more than 3 years of historical data.

Meet the requirements of separate discharge of cleaning liquid and waste liquid

3. Technical parameters of hexavalent chromium automatic monitor

Measuring method: diphenylcarbazide spectrophotometric colorimetric method

Measuring range: 0-2 mg/L; 0-20 mg/L; range can be customized

Indication error: ≤±8% Detection limit: 0.01mg/L

Repeatability: ≤±5% Waste liquid volume: 6mL/time

Memory effect: ≤±0.3mg/L Actual water sample comparison: When the concentration is ≤0.400mg/L, compare

When the detection error is ≤0.06mg/L and the concentration is >0.400mg/L

Comparison and detection error ≤±15%

Constant temperature time: 360 seconds Voltage stability: ≤±5%

Measurement period: 25 minutes Calibration period: any specified time

Maintenance cycle: ≥720h/time Maintenance workload: <2 hours/month

Reagent consumption: 3 months/500ml Display output: Equipped with 10.1-inch color LCD touch screen

Color temperature: The recommended temperature is 125°C, which can be set according to the actual water sample conditions

Data export: Measured values ​​can be imported into a U disk and saved through the USB port.

Signal output: RS485/RS232/USB interface/standard configuration: 2 channels of 4-20mA output/standard configuration of two channels of switching input and output

Environmental requirements: Temperature-controlled indoors, recommended temperature (5-28°C), humidity ≦90% (no condensation)

Power supply and power: (220V±22)V/AC, (50±0.5Hz), 5A, 150W