Misunderstanding 1. Non-constant temperature and humidity conditions
It should be a designated electrostatic protection zone, and the temperature and humidity are generally controlled at 21+2OC, 45~65%, and the real-time monitoring thermometer and hygrometer can be installed. The current temperature and humidity of the recorder are required before each test.
Misunderstanding 2, testers who have not been trained for professional training
The material tester must be a professionally trained and certified person to be employed.
Misunderstanding 3, did not ensure that the testers and instruments are well grounded
In the standard material test, the tester is generally required to ground the belt with the wrist. The test instrument also needs to be grounded directly (such as Terk520). Before each test, check whether the grounding terminal is fully connected.
Misunderstanding 4, non-dedicated stainless steel grounding table and insulation board with unknown parameters
A dedicated test bench and a spare insulation board should be set up separately, and the test bench should be grounded separately.
Misunderstanding 5. The cleanliness of the sample and instrument contact surface is not checked before the test.
In order to ensure that the sample is not affected by surface stains during testing, the surface cleanliness of the material and the cleanliness of the instrument surface should be checked before testing. (For example, the surface of the two electrodes of the megohmmeter should be clean to the surface of the sample, otherwise it will interfere with the test effect)
Misunderstanding 6. The instrument has not been checked before the test.
Dedicated test instruments also need to be calibrated regularly to ensure that they operate within the valid range.
Misunderstanding VII, the sample to be tested is not balanced enough time under the specified conditions
Before the test sample is tested, it should be exposed to a constant temperature and humidity test condition for a certain period of time (usually 24 hours) to eliminate the influence of external factors.
Misunderstanding VIII. External factors are not avoided during the test.
Samples should avoid any external interference other than the tester and the current sample during the test to ensure the accuracy of the results.
Dedicated test instruments also need to be calibrated regularly to ensure that they operate within the valid range.
Misunderstanding VII, the sample to be tested is not balanced enough time under the specified conditions
Before the test sample is tested, it should be exposed to a constant temperature and humidity test condition for a certain period of time (usually 24 hours) to eliminate the influence of external factors.
Misunderstanding VIII. External factors are not avoided during the test.
Samples should avoid any external interference other than the tester and the current sample during the test to ensure the accuracy of the results.
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