HBCOD-1 online chemical oxygen demand analyzer

HBCOD-1 online chemical oxygen demand analyzer

Chemical Oxygen Demand (COD) refers to the amount of oxidant consumed when treating water samples with strong oxidants under certain conditions, expressed in mg/L. COD reflects the degree of pollution caused by reducing substances in water bodies. Reducing substances in water include organic matter, nitrite, ferrous salts, sulfides, etc. Among them, water pollution by organic matter is the most common, so COD is also one of the indicators of relative organic matter content.

The HBCOD-1 online COD analyzer combines the potassium dichromate open digestion method and rapid colorimetric method specified in GB11914-89, and adopts advanced and reliable microcomputer control technology to automatically control water sample collection, chemical addition, automatic constant temperature, and automatic photoelectric colorimetric. It quickly, continuously, and independently completes the entire process of COD analysis in sewage. Due to the use of standard microcomputer interface technology, the instrument can independently complete COD analysis in sewage, and can also be connected to other microcomputer systems to achieve total COD control in water bodies. This instrument can be widely used for measuring COD in domestic sewage, industrial wastewater, and surface water.

main features

◇ Large screen LCD display

The instrument adopts a large screen graphic dot matrix LCD display, which can display the process flow of the entire analysis process, intuitively display the measurement results, and also display reports and curves.

◇ Automatic calibration

The instrument automatically performs zero calibration for each analysis.

◇ 4mA~20mA remote transmission current output

4mA~20mA correspond to linear output between zero and full range, respectively.

◇ Storage function

The instrument is equipped with a large capacity electronic hard drive that can store measurement data for ten years of continuous operation.

◇ Reagent alarm function

Set the remaining amount of reagents. When the remaining amount of reagents falls below the lower limit, the instrument will stop running and sound an alarm.

◇ Manual function

The processes of adding samples, adding drugs, heating, and discharging waste liquids can be manually completed through the keyboard.

◇ Automatic range adjustment

According to changes in water quality concentration, the equipment automatically switches between standard range and high concentration range to ensure measurement accuracy.

◇ Excessive sample retention function

In conjunction with an automatic water quality sampler, it can achieve the function of retaining samples that exceed the standard.

◇ Water shortage protection function

In conjunction with the flow meter, it is possible to not analyze the discharge outlet when there is no water or little drainage, and to analyze it again when there is water, in order to protect the water collection equipment and analytical instruments.

◇ Automatic sampling function

◇ Power off protection function

◇ Fault protection

When the reaction solution in the reaction tube is significantly insufficient, the instrument will automatically stop and display "fault".

◇ RS232 communication interface

Through the RS232 interface of the instrument, data acquisition and control of the instrument can be achieved. The instrument is equipped with multiple communication protocols and can be customized according to user needs.

technical specifications

• Range of measurement
• Indication error
• Repeatability error
• Minimum measurement cycle
• signal output
• communication interface
• Power Supply
• maximum power
• ambient temperature
• ambient humidity
• atmospheric pressure
• Grounding resistance
• Sampling outlet

• (10-200) mg/L, (10-1000) mg/L (optional)
• ±8%
• ≤3%
• 30min
• 4mA~20mA
• RS232
• AC 220 V ±10% ，50Hz
• 400 VA
• 5℃~35℃
• ≤85%
• 86 kPa~106kPa
• R≤10 Ω
• Distance L ≤ 15m, drop H ≤ 6m