In the fields of energy and chemical industry, microcomputer calorimeters are key equipment for accurately measuring the calorific value of substances. Their measurement accuracy directly affects the accuracy of experimental and production data, and calibration is the core link to ensure accuracy. Master the scientific calibration method, so that the equipment can play a stable performance, the following is the detailed calibration process.

Preparation before calibration

Before calibration, it is necessary to make full preparations, which is the basis for the smooth development of calibration. First of all, it is necessary to choose the appropriate standard material, and the benzoic acid that has been certified by the state and has a stable calorific value is preferred. The calorific value data needs to be accurate and can be checked within the valid period. At the same time, ensure that the appearance of the microcomputer calorimeter is intact, the power supply and line connection are stable, the inner cylinder and outer cylinder have no leakage or blockage problems, the oxygen bomb has no deformation and is well sealed, and avoid affecting the calibration results due to equipment hardware problems.

Second, the core calibration operation steps

1. Instrument parameter initialization: Turn on the microcomputer calorimeter, enter the calibration mode, and initialize the key parameters such as temperature and time according to the equipment manual, so that the instrument is in the standard calibration state, which is a prerequisite for subsequent accurate measurement.

2. Standard substance test: put the weighed standard benzoic acid (the weight should be strictly controlled according to the requirements of the equipment, and the error should be controlled in a very small range) into the oxygen bomb, fill it with enough high-pressure oxygen to ensure that the sample is fully burned. Then put the oxygen bomb into the inner cylinder, start the test program, and record the calorific value measured by the instrument.

3. Data comparison and calibration: Compare the calorific value measured by the instrument with the calibrated calorific value of standard benzoic acid to calculate the deviation value. If the deviation exceeds the allowable range, through the calibration function of the instrument, adjust the relevant parameters, repeatedly test and fine-tune until the measurement data and the standard calorific value error are within the specified range, and complete the calibration operation.

III. Post-calibration verification and maintenance

After the calibration is completed, a verification test needs to be carried out, and the test process needs to be repeated with another set of standard materials to confirm that the measurement accuracy is up to standard and ensure the reliable calibration effect. Daily equipment maintenance is also required, regular cleaning of oxygen bombs and inner cylinders, and inspection of sensor sensitivity is required to keep the microcomputer calorimeter in good working condition and continuously ensure the measurement accuracy.

Strictly following the above calibration process can not only efficiently complete the calibration of the microcomputer calorimeter, but also effectively ensure the measurement accuracy of the equipment, providing reliable data support for various experimental and production work.