I. Scope of Application
The calorific value tester for building materials, also known as a calorimeter, is used to determine the calorific value of building materials by means of an oxygen‑bomb calorimeter with constant heat capacity, including total combustion calorific value and net calorific value.

II. Execution Standards It complies with the test standards of GB/T14402‑2007 "Combustion Performance of Building Materials and Products ‑ Determination of Combustion Calorific Value" and ISO 1716‑2002 "Fire Reaction Test of Building Products ‑ Determination of Combustion Calorific Value".

III. Main Technical Parameters

1. Total calorific value of combustion: 30,000,000 J/kg (30 MJ/kg)
2. Repeatability error of combustion calorific value: dynamic ≤0.1%
3. Temperature measurement range: 0‑50 ℃
4. Temperature resolution: 0.0001 ℃, equipped with PT100 sensor
5. Oxygen bomb volume: 300 ml; weight: 3.2 kg
6. Inner cylinder volume: 2200 ml
7. Oxygen bomb oxygen‑charging pressure: 0‑3.5 MPa, zero‑leakage performance
8. Oxygen bomb water pressure resistance: ≥21 MPa
9. Stirring power: 3 W
10. Inner cylinder stirring speed: 375 r/min
11. Power Supply: AC 185‑245 V
12. Two stainless‑steel crucibles
13. One oxygen bomb
14. One roll of ignition wire
15. Supports crucible method and smoldering specimen method
16. Comes with one set of preparation device for smoldering specimens
17. The system automatically records temperature‑rise data and time. Based on input heat capacity, sample mass and additional heat parameters, the system can complete automatic data processing, temperature correction and total calorific value calculation, and output test results. The supporting computer is featured with icon display, curve display, Excel data export, printing, data input and command control functions. For enhanced system safety, the computer system is equipped with fault alarm and warning reminder functions.
18. Ignition circuit: 12 V working voltage, 100 mA adjustable current; 0.1 mm‑diameter iron wire used as ignition wire
19. Supports absolute‑heat thermal system and isothermal calorimetry system
20. Direct read‑out of total calorific value and net calorific value, no manual calculation required
21. One set of computer and one printer