Adopting standards:

GB/T213-2008 "Method for determination of calorific value of coal", GB/T483-2007 "General determination of test methods for coal analysis", GB/T384-1981 "Method for determination of calorific value of petroleum products", GB/T30727-2014 "Method for determination of calorific value of solid biomass fuels" GB/T14402-2007Combustion performance of building materials and products - Determination of calorific value of combustion》JC/T1005-2006 "Method for determination of calorific value of cement black raw materials"ASTM D5865-13 "Standard Test Method for Gross Heating Value of Coal and Coke", ISO1928-2009 "Solid Mineral Fuel - Determination of Total Value and Calculation of Net Heating Value by Oxygen Bomb Calorimeter" CEN/TS 14918Method for determining the calorific value of solid biofuels》The BS SN 15400-2011Solid Recycling Fuel - Heat Generation Test》The IS：1350-1970Methods for determination of coal and coke》.

Scope of application:

The ZDHW-4A microcomputer fully automatic calorimeter is suitable for the calorific value of combustibles in power, coal, metallurgy, petrochemicals, coalification, environmental protection, cement, papermaking, geological exploration, grain, feed, military and other industries.

Product Overview:

A multifunctional Chinese thermal measurement instrument developed using microcontroller technology. It has the characteristics of high testing accuracy, stable performance, and high cost-effectiveness. Adopting LCD display, the display is intuitive and the operation is simpleIt's convenient. Equipped with a serial port printer, the experimental results are clear at a glance.

The instrument has storage and computing capabilities, and records recent experimental results through a micro printer for easy retrieval and convenience for operators. The carefully crafted calculation program has improved the accuracy of calculations,Due to the large water volume, satisfactory test results can still be obtained without adjusting the inner cylinder water temperature.

The instrument adopts dual probes, and 18B20 digital temperature measurement does not require AD conversion. It can simultaneously measure the water temperature of the inner and outer cylinders, saving time for inputting the temperature of the outer cylinder. Combination of controller and hostIntegrated, beautiful, practical, and space saving.

Environmental requirements:

The fully automatic calorimeter laboratory should have a separate room, and no other objective test items should be conducted simultaneously in the same room; The laboratory suggests facing north to avoid exposure to sunlight; Otherwise, the instrument should be placed in a place that is not directly exposed to sunlight.

The room temperature should be kept as stable as possible, and the temperature change during each measurement should not exceed 1K. Generally, the room temperature should be within the range of 10-30 ℃.

There should be no strong air convection indoors, so there should be no strong heat sources or fans. During the testing process, doors and windows should be avoided from being opened; Avoid having too many people indoors.

If air conditioning is installed in the laboratory, it is necessary to avoid the airflow generated during the operation of the air conditioning directly blowing towards the instruments. It is recommended that users keep the air conditioning on or off for 24 consecutive hours.

Technical indicators:

■ Heat capacity: approximately 10450J/K

Accuracy: The test results are within the allowable range of the standard sample

Precision of heat capacity: ≤ 0.15%

■ Outer cylinder capacity: approximately 45L

■ Inner cylinder capacity: approximately 2.1L

■ Temperature range: 5-40 ℃

Measurement error: ＜ 0.3%

Test time:< 15min

■ Temperature measurement resolution:> 0.001℃

■ Power: 0.45kW

Power supply voltage: AC220V ± 15% 50HZ

Standard configuration: ZDHW-4A host, circulating water tank host