Tips and calibration methods for using handheld thickness gauges
The ultrasonic thickness gauge, which is often said to be the new high-performance, low-power microprocessor technology, based on the principle of ultrasonic measurement, can measure the thickness of metal and many other materials, and can measure the speed of sound of the material. It can measure the thickness of various pipelines and pressure vessels in the production equipment, monitor the degree of thinning after they are corroded in the process of use, and also make measurements on various plates and various processed parts.
Ultrasonic principle and applications:
Adopting the principle of pulsed reflection ultrasonic measurement, it is suitable for measuring the thickness of all kinds of materials in which ultrasonic waves can propagate inside with a constant speed and can be reflected from the back side. This instrument can measure all kinds of plates and all kinds of processed parts. Can be widely used in petroleum, chemical, metallurgy, shipbuilding, aviation, aerospace and other fields. Because now science is so developed, ultrasonic processing and very convenient, and has a good pointing, ultrasonic technology to measure the thickness of metal, non-metallic materials, both fast and accurate, pollution-free, especially in only one side of the permit can be pressed and touched the occasion, can show its superiority, widely used in a variety of plates, tubes wall thickness, boiler vessel wall thickness and its local corrosion, corrosion, and therefore on metallurgy, shipbuilding, machinery, Metallurgy, shipbuilding, machinery, chemical industry, electric power, atomic energy and other industrial sectors of the product inspection, the safe operation of equipment and modern management plays a major role.
Ultrasonic thickness gauge using skills:
Ordinary measurement method of two small
1" at a point with a probe for two thickness measurement, in the two measurements in the probe's split surface to each other for 90 °, take the smaller value for the measured thickness of the workpiece value.
2" 30mm multi-point measurement method: when the measurement value is not stable, to a measurement point as the centre, in a circle with a diameter of about 30mm for multiple measurements, take the smaller value for the measured workpiece thickness value.
Ultrasonic thickness gauge measurement method.
Increase the number of measurements around the specified measurement point, the thickness change is indicated by the isothickness line.
Ultrasonic thickness gauge continuous measurement method:
Use a single point measurement method along the specified route continuous measurement, the interval is not more than 5mm.
Calibration method.
<1> Appearance inspection Accessories complete, the appearance of hard bruises and deformation, all fasteners shall not be loose and fall off.
<2>Test Error ∣Instrumental value - Nominal value ∣≤ Allowable error ∣Instrumental value - Nominal value ∣≤ 0.3‰ Nominal value.
Precautions during operation:
1: When the power supply voltage is low, the low voltage symbol will be displayed on the left side of the LCD screen, at this time, in order to ensure the normal measurement and use of the instrument, please replace the battery in time.
2: When the backlight is not needed, try not to turn on the backlight for a long time, so as not to consume the battery power too quickly.
3: The surface of the sensor is acrylic resin, which is sensitive to heavy scratching on rough surfaces, so try to press it lightly in use.
4: Try to clean up the coupling agent on the surface of the sensor and the standard test block, and the coupling agent on the surface of the object to be measured in time after the measurement.
5: The surface temperature of the object to be measured does not exceed 60 degrees, so as not to cause the sensor can not be measured properly.
6: The instrument should be removed from the battery when it is not in use for a long time, so as not to cause damage to the instrument due to battery leakage.
7:Try to avoid oil, humidity, collision.
8:When plugging and unplugging the sensor, you should pinch the movable jacket and exert force along the axis, do not rotate the sensor head, so as not to damage the sensor cable core.
