High and low temperature low-pressure test chamber requirements for inspection equipment:
The temperature measurement system, which includes a platinum resistance thermometer, a thermocouple sensor, and a secondary instrument, must be capable of accurate measurements under low-pressure conditions. The expanded uncertainty (k=2) of the measurement result should not exceed one-third of the allowed 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 stability and accuracy during testing.
For pressure measurement, the barometer used must have an expanded uncertainty (k=2) that does not exceed one-third of the allowable deviation of the measured gas pressure. This ensures reliable and precise pressure readings under varying conditions.
Additionally, the noise measurement instrument must be a sound level meter equipped with an A-weighted network. Its measurement uncertainty (k=2) should not exceed 1 dB, ensuring accurate acoustic performance evaluation.
These specifications are essential to guarantee the reliability and precision of test results in high and low-temperature, low-pressure environments. Proper calibration and adherence to these standards help maintain consistency and compliance with industry requirements. Whether conducting routine checks or detailed analysis, having the right instruments is crucial for effective testing and quality assurance.
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