Overview of MCT200 Portable Coating Thickness Gauge:
1. Made of aluminum shell, compact, portable, sturdy and durable, suitable for harsh operating environments, resistant to vibration, impact and electromagnetic interference; The interface adopts advanced foreign technology, which is durable and not easily damaged;
2. There are ten types of probes to choose from, and the contact parts of the probes are plated with hard chrome or ruby, which are durable and long-lasting;
3. It has the functions of zero point calibration, one point calibration, and two-point calibration of the measuring head, and can use basic calibration methods to correct the systematic errors of the measuring head;
4. Equipped with measurement status prompt function; Equipped with EL backlight display, convenient for use in low light environments;
5. Long standby time of over 200 hours, with a remaining battery indicator function that can display the remaining battery level in real time; It has energy-saving functions such as automatic sleep mode and automatic shutdown; No need to constantly replace the battery
6. 20 sets of ultra large storage capacity (each set can store 50 measurement values) with USB communication interface that can be connected to a computer to transfer measurement values to a PC;
　　Main purpose:
The MCT200 portable coating (plating) film thickness gauge is the crystallization of high-tech. It adopts single-chip technology, with high precision, high brightness screen, digital display, stable indication, sensitive response, low power consumption, simple and convenient operation, no calibration knob, single probe full range measurement, small size, light weight, and beautiful appearance; And it has storage, readout, low voltage indication, and its performance reaches the advanced level of contemporary international instruments. It can quickly, non destructively, and accurately measure the thickness of coatings and plating layers, as well as thin film thickness. This instrument can be widely used in manufacturing, metal processing industry, chemical industry, commercial inspection and other testing fields, and is an essential instrument for material protection professionals. It can be used in both laboratories and engineering sites.
　　Main features:
1. There are ten types of probes to choose from, and the contact parts of the probes are plated with hard chrome or ruby, which are durable and long-lasting;
2. Automatic recognition probe
3. It is possible to read measurement data at any measurement location using a mobile menu based function selection method, which is very easy to operate.
4. The upper and lower limits can be set, and when the measurement result is greater than or equal to the upper and lower limit values, the instrument will emit corresponding sounds or flash lights to indicate.
5. Extremely stable and can be used for a long time without calibration.
6. Single or multiple data can be deleted
7. There is a buzzing sound during the operation process to prompt
8. Notify errors through screen display or beeping sound
9. There are five statistical measures: Mean, Maximum, Minimum, Number of Tests, and Standard Deviation
10. By selecting the corresponding probe, it is possible to measure both the thickness of the non-magnetic coating layer on the magnetic metal substrate and the thickness of the non-conductive coating layer on the non-magnetic metal substrate;
11. It has the functions of zero point calibration, one point calibration, and two-point calibration of the measuring head, and can use basic calibration methods to correct the systematic errors of the measuring head;
12. Equipped with measurement status prompt function;
13. Equipped with EL backlight display, convenient for use in low light environments;
14. There is a remaining battery level indicator function that can display the remaining battery level in real time;
15. It has energy-saving functions such as automatic sleep mode and automatic shutdown;
16. Equipped with a USB1.1 communication interface, it can transmit measurement values to a PC.
17. Optional microcomputer software with rich functions such as transmission of measurement results, storage and management of measurement values, statistical analysis of measurement values, and printing of measurement reports;
18. Made of aluminum shell, compact, portable, sturdy and durable, suitable for harsh operating environments, resistant to vibration, impact and electromagnetic interference;
　　Meets the following standards:
GB/T 4956-2003 Non magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method
GB/T 4957-2003 Non conductive coatings on non-magnetic metal substrates - Measurement of coating thickness - Eddy current method
◇ JB/T 8393-1996 Magnetic and Eddy Current Coating Thickness Measuring Instrument
JG 818-2005 "Magnetic and Eddy Current Coating Thickness Measuring Instrument"
　　working principle:
This instrument adopts two thickness measurement methods, magnetic and eddy current. Magnetic induction can be used to measure non-magnetic coating layers (such as paint, anti-corrosion layer, galvanized layer, copper plating layer, etc.) on all magnetic substrates (such as steel, iron). l
The eddy current coating thickness gauge can be used to measure non-conductive coatings (such as paint, anti-corrosion coatings, oxide films) on all non-magnetic metals (such as copper, aluminum, stainless steel).
　Technical parameters:
Measurement range: (0-1250) μ m (F1, N1 probes), F10 probe can reach up to 10mm;
◇ Resolution: 0.1 μ m (F1, N1 probes)
◇ Indication accuracy: ± (3% H+1) μ m; H is the thickness of the tested coating
Display method: High contrast segmented LCD display, high brightness EL backlight;
◇ Storage capacity: can store 20 sets (up to 50 measurement values per set) of measurement data
Unit system: metric (μ m), imperial (mil), freely convertible
◇ Working voltage: 3V (2 pieces of No. 5 alkaline batteries)
◇ Continuous working time: greater than 200 hours (when backlight is not turned on)
Communication interface: USB1.1, capable of connecting and communicating with a PC
◇ Dimensions: 125mm × 67mm × 31mm
◇ Weight of the whole machine: 340g

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　　Extended reading:

　　Factors and solutions affecting the measurement values of MCT200 portable coating thickness gauge
Using the MCT200 portable coating thickness gauge, like using other instruments, requires not only mastering the instrument performance but also understanding the testing conditions. The coating thickness gauge using magnetic and eddy current principles is based on the electrical and magnetic properties of the measured substrate and the distance from the probe to measure the coating thickness. Therefore, the electromagnetic physical properties and physical dimensions of the measured substrate affect the magnitude of magnetic flux and eddy current. This affects the reliability of the measured values. Below is an introduction to this issue.
1. Boundary spacing
If the distance between the probe and the boundary, hole, cavity, or other cross-sectional changes of the measured object is less than the specified boundary distance, measurement errors will occur due to insufficient cross-section of the magnetic flux or eddy current carrier. If it is necessary to measure the thickness of the coating at this point, it can only be measured by pre calibrating on an uncoated surface under the same conditions. (Note: The latest MCT200 portable coating thickness gauge product has a unique function of calibrating through coating, which can achieve an accuracy of 3-10%.)
2. Surface curvature of the substrate
Calibrate an initial value on a flat comparison sample, and then subtract this initial value after measuring the coating thickness. Or refer to the following article.
3. Minimum thickness of base metal
The base metal must have a given minimum thickness, so that the probe electromagnetic field of the MCT200 portable coating thickness gauge can be completely contained within the base metal. The minimum thickness is related to the performance of the measuring instrument and the properties of the metal substrate. Measurements can be taken just above this thickness without the need for correction of the measured values. The impact caused by insufficient thickness of the substrate can be eliminated by placing a piece of the same material tightly under the substrate. If it is difficult to make a decision or unable to add a substrate, the difference from the rated value can be determined by comparing it with a sample with a known coating thickness. And consider this point in the measurement and make corresponding corrections to the measured values or refer to Article 2 for correction. And those instruments that can be calibrated can obtain accurate direct reading thickness values by adjusting knobs or buttons. On the contrary, by utilizing the influence caused by the thickness being too small, a thickness gauge that can directly measure the thickness of copper foil can be developed, as mentioned earlier.
4. Surface roughness and surface cleanliness
To obtain a representative average measurement value on a rough surface, multiple measurements must be taken. It is obvious that the rougher the substrate or coating, the less reliable the measurement value. To obtain reliable data, the average roughness Ra of the substrate should be less than 5% of the coating thickness. For surface impurities, they should be removed. Some MCT200 portable coating thickness gauges have upper and lower limits to eliminate those "flying points".
5. Force exerted on the probe measuring board
The force applied during probe measurement should be constant. And it should be as small as possible. To prevent deformation of the soft coating and a decrease in measurement values. If there is a large fluctuation in the activity, a hard thin film with a certain thickness can be placed between the two if necessary. For MCT200 portable coating thickness gauge, it is non-conductive. By subtracting the thickness of the film, residual magnetism can be appropriately obtained.
6. External constant magnetic field, electromagnetic field, and residual magnetism of the substrate
Measurement of MCT200 portable coating thickness gauge should be avoided near external magnetic fields with interference. The residual magnetism may cause measurement errors to varying degrees depending on the performance of the detector, but such phenomena generally do not occur in structural steel, deep drawn formed steel plates, etc.
7. The ferromagnetic and conductive components in the coating material
The presence of certain ferromagnetic components in the coating, such as certain pigments, can affect the measurement values of the MCT200 portable coating thickness gauge. In this case, the comparative sample coating used for calibration should have the same electromagnetic characteristics as the coating of the tested object and be used after calibration. The method used can be to apply the same coating onto aluminum or copper plate samples, and obtain comparative standard samples after testing with eddy current method. It can also be purchased from relevant metrology and testing departments.