The working principle of the drug stability tester is to evaluate the stability of drugs by simulating environmental conditions. Specifically, it precisely controls parameters such as temperature, humidity, and lighting through a control system, simulating various environmental conditions that drugs may encounter during actual use. These conditions can simulate the storage, transportation, and use of drugs in different environments, in order to evaluate the stability and quality of the drugs.
Detailed explanation of the working principle of the drug stability tester
♦ Temperature system control method: Through forced circulation ventilation and balanced temperature control (BTC), the control system automatically calculates the output of the heater based on the set temperature point through PID calculation, ultimately achieving a dynamic balance.
♦ Humidity system control method: The humidity controller controls the solid-state relay through an internal PID integrated block electronic output signal, and then controls the power supply of the humidifier. When PT100 directly senses the set temperature, the humidifier stops humidifying and remains in a constant humidity state.
♦ Air heating method: stainless steel heater is used, which has anti-corrosion and moisture resistance effects, and the reaction speed is faster than that of the heating tube.
♦ Humidification system: Stainless steel electric heating tubes are used to directly heat and extract humidity from water. The design includes an over temperature protection system, and tap water is filtered through a filter before being replenished with water.
Operation specifications for drug stability tester
♦ Equipment preparation: Check the appearance and operating status of the equipment to ensure that it is functioning properly, check if the power, water, and air sources are connected, and ensure that the equipment is placed in a well ventilated and dry environment.
♦ Parameter setting: Set temperature, humidity, lighting and other parameters according to the test requirements to ensure accurate parameter settings, and set the test time and mode.
♦ Sample placement: Place the drug to be tested on the sample rack inside the testing chamber to ensure uniform distribution of the sample and avoid the occurrence of local high or low temperatures.
♦ Start the experiment: After confirming that the equipment parameter settings are correct, start the experiment, closely monitor the equipment operation status, and record the changes in temperature, humidity, lighting, and other parameters during the experiment.
♦ Result processing: After the experiment is completed, observe the changes in the appearance, color, and characteristics of the drug, and record them. Organize and analyze the experimental data to draw conclusions on the stability of the drug.
♦ Equipment maintenance: Regularly clean and maintain the equipment to maintain its good condition and service life, and regularly check whether the electrical system, control system, and safety protection devices of the equipment are normal.