ISO Chemical Oxygen Demand Digestion Tester Water Oxidation Demand Digestive Tester COD Digestive Analyzer COD Digester

Item

Parameters

Applicable Standard

HJ828-2017

Measuring Range

5~700 mg/L; 700~10000 mg/L (measurement after dilution)

Digestion Time

1 minute ~ 2 hours and 30 minutes (adjustable by users)

Measurement Deviation

Potassium hydrogen phthalate standard solution (500 mg/L): relative standard deviation ≤5.0%Industrial organic wastewater (500 mg/L): relative standard deviation ≤8.0%

Ambient Temperature

≤40°C

Cooling Method

Water cooling with top-mounted thorn-shaped condenser tube plus dual-fan combined cooling

Number of Digestion Samples

12 pieces of 250 mL conical flasks, heated simultaneously in three rows

Heating Power

Less than 2800W (AC 220V, 50Hz)

Heating Surface

Microcrystalline glass heating plate, integral overhead structure for easy replacement and maintenance

Fan Control

The fan is on by default after the instrument is reset. The fan can be turned on and off at any time; press once to turn it on, press again to turn it off, and repeat.

Heating Control

The Start button is only operable when the Working indicator light is on. After reset, the heating device is stopped. Press the Start button once to start heating, press again to stop heating, and repeat.

Parameter Setting

Press the Set button (it will automatically stop heating if the instrument is heating). The 6 indicator lights will illuminate sequentially

Working Light On

The Start button is operable; the Up/Down buttons are inactive.

Time Light On

Adjust the heating time using the Up/Down buttons (each press increases or decreases by 10 minutes), **150 minutes.

Temperature indicator light

Adjust the heating temperature using the up/down keys (each press increases or decreases by 10℃), maximum 500℃.

Power indicator light

Adjust the heating power using the up/down keys (each press increases or decreases by 5%), maximum 500℃.

Parameter saving

The instrument automatically saves the set time, temperature, and power parameters, which are automatically recalled upon next power-on without needing to be re-set.

Display area description

Front panel display area

Bottom row of numbers

Current temperature

Top numbers

Timer duration

Precautions

Please refer to the national standard analytical method HJ828-2017 for sample processing and analysis methods.

Before using the instrument, please ensure that the power supply and cooling system are working properly to ensure a safe and reliable digestion process.