Common Problems and Solutions with Coating Thickness Gauges
Coating thickness gauge common faults and solutions
Coating thickness gauge faults are mainly unstable display value, measurement error is large, the screen does not show data. Causes these faulty elements both from the instrument itself, but also the elements of the measured workpiece, and that is from the human influence, the following Zhuhai Tianchuang Instrument Company for you to introduce the coating thickness gauge common faults and solutions
1. Show value is not stable
Cause coating thickness gauge display value unstable elements are mainly from the workpiece itself, the material and structure of the particularity, such as the workpiece itself is not a magnetic material, if it is magnetic material we have to choose magnetic coating thickness gauge, if the workpiece is conductive, we have to choose eddy current coating thickness gauge. Furthermore, the measured parts of the appearance of roughness and adhesion is also an important element that causes the instrument to show the value of the unstable, thickness gauge probe for those who hinder the cover layer with the appearance of close contact with the adhesion of the material is extremely sensitive. It is necessary to ensure that the probe and the cover layer appearance straight touch. Therefore, the key to eliminate this kind of problem is: before the measurement to eliminate the measured parts of the touch surface of the dust, fine debris, grease and corrosion products and other attachments, but do not remove any covering layer material. That is, when the system is zeroed, the use of the substrate appearance is also necessary to clean, lubricated. If you feel that the measurement results of the error is relatively large, please use the instrument equipped with plastic calibration sheet to do a round of tests, such as the violation of the promised error is farther away from the instrument itself may be a problem, need to go back to the manufacturer overhaul. In the system calibration did not select the appropriate substrate. The small plane of the substrate for 7mm, a small thickness of 0.2mm, below this critical condition measurement is unreliable.
2. Measurement results of large errors
Probe placement method has a great impact on the measurement, in the measurement of the probe should be made to adhere to the appearance of the measured parts straight. And the probe should not be placed for too long, to avoid the formation of the substrate itself, the magnetic field of the disturbance. Measurement should not drag the probe, because so not only on the probe will form wear and tear, but also will not get the measurement results. In addition, the base metal is magnetised, the thickness of the base metal is too small, the curvature of the workpiece is too small, the measurement of the base of the appearance of corrosion, measurement of the electromagnetic field around the site of the disturbance and other factors may lead to the measurement of the results of the anomalies, such as the electromagnetic field from the electromagnetic field is very close to the time may also have a crash scene.
3. Screen does not show data
Simple element is to check the battery is not enough power, determined that the battery power is enough to find that the measurement still does not show the value, you can think about whether there is a probe and connecting line is loose, disconnected or touch bad scene, the battery leakage corrosion of electronic components within the instrument and other factors. I have encountered in the actual operation of the probe due to improper use of chemical corrosion, resulting in the instrument does not show the data of the scene.
4. Human factors
Coating thickness gauge can be measured to the micron level because it can be adopted by the magnetic flux of small changes, and turn it into a digital signal. Users in the measurement process if the instrument is not familiar with the probe may be contrary to the measured body, so that the magnetic flux changes to form the wrong measurement. The first time the user to use the instrument, we must first carefully read the manual, grasp the measurement method.
5. The instrument itself is faulty
Prolonged in the working condition of the thickness gauge, very likely to have a boom, fall, and other accidents, or where the operating environment has a magnetic field interference, resulting in the internal electronic parts of the instrument is disturbed to the damage, but also due to the many times, many addresses, resulting in the instrument measurement data is not reliable, the screen data is displayed in the garbled, and even can not be turned on, etc., so we advocate to try to ensure that a person to use and safekeeping of the instrument, the onset of defects in a timely manner! Return to the factory for repair, not privately dismantle the machine to view.
