High and low temperature low-pressure test chamber requirements for inspection equipment:
The temperature measurement system, which includes a platinum resistance thermometer, thermocouple sensor, and secondary instrument, must be suitable for use under low-pressure conditions. The expanded uncertainty of the measurement result (k=2) should not exceed one-third of the allowable temperature deviation. The platinum resistance sensor must meet Class A standards as specified in IEC60751, while the thermocouple sensor should comply with GB/T 16839.1.
The response time of the sensor in air should be between 10 seconds and 40 seconds, and the overall response time of the temperature measurement system should be no less than 40 seconds to ensure accurate and stable readings.
For pressure measurement, the barometer used must have an expanded uncertainty (k=2) that does not exceed one-third of the allowable pressure deviation. This ensures reliable and precise pressure monitoring during testing.
Regarding noise measurement, a sound level meter equipped with an A-weighted network is required. The measurement uncertainty (k=2) should not exceed 1 dB, ensuring that acoustic performance is evaluated accurately.
These specifications are essential to guarantee the reliability and accuracy of test results in both high and low-temperature environments under low-pressure conditions. Proper calibration and selection of instruments play a crucial role in maintaining the integrity of the testing process. It's important to follow these guidelines to ensure compliance with industry standards and to provide trustworthy data for quality control and product validation.
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