MUE 現代超音波有限公司 Modern Ultrasonic Engineering Co., Ltd.

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《3》Ultrasonic Pressure Test Rod Calibration FAQs

3-1

Q：

A：

Why do Ultrasonic Pressure Test Rods need to calibration?

Because the sensor of the Ultrasonic Pressure Test Rod is a very sensitive parts, aging will occur as the use time increases. The speed of aging is directly related to the length of use time, the strength of the measured energy, and the level of the measured temperature, etc. These results affect the accuracy of the measurement.

The purpose of regular calibration is to monitor whether the measurement accuracy of the Ultrasonic Pressure Test Rod has changed, and whether the magnitude of the change is within an acceptable range to ensure the accuracy of the measurement.

If the magnitude of the change is within an acceptable range, no correction is required. The report lists the actual data.

If the magnitude of the change is outside an acceptable range, and the conditions of the Ultrasonic Pressure Test Rod can be corrected, correction is made to correct the error, restore the accuracy of the measurement. The report lists the corrected data.

If the magnitude of the change is outside an acceptable range, and the conditions of the Ultrasonic Pressure Test Rod cannot be corrected, it means that which has been severely aged and cannot be used. The report lists the actual data.

3-2

Q：

A：

Why the Ultrasonic Pressure Test Rods divide one-point calibration and two-point calibration?

Because each sensor of the Ultrasonic Pressure Test Rod has different characteristics, including sensitivity, frequency and temperature characteristics. The difference in frequency characteristics is the greatest. For each additional frequency point of calibration, the required man-hours are increased squarely, which directly affects the cost and prices.

Therefore, in production, according to the actual demand, it is divided into two models：one-point calibration and two-point calibration.

Standard model：1 frequency point calibration, check and correction, basically can meet the general requirements. The point frequency is 28KHz.

High-freq. model：2 frequency point calibration, check and correction, can meet the requirements of higher frequencies. The points frequency are 28KHz & 300KHz.

THe 300KHz calibration point can also be changed to 1000KHz or other frequencies according to customer requirements.

3-3

Q：

A：

Which frequencies can be used as calibration and correction points?

In addition to the calibration base point of 28KHz, customer can choose to add the following 7 frequencies as check points as needed. They are：40KHz, 68KHz, 80KHz, 130KHz, 300KHz, 1MHz & 1.7MHz.

However, the correction is still limited to no more than 2 frequency points, including the base point of 28KHz.