Overview
LEEB U920 High Accuracy Coating thickness gauge is an instrument that can quickly, non-destructive and precise coating and platings measurement. It can be used in laboratories and engineering sites. By applying different probes, it can meet a variety of measurement needs and is widely used in manufacturing, metal processing, chemical industry, commodity inspection and other inspection fields.
Features
1. Full Chinese menu interface operation, simple and convenient.
2. Using magnetic and eddy current thickness measurement methods, nondestructive measurement of magnetic metal substrate nonmagnetic coating thickness and nonconductive coating thickness on nonmagnetic metal substrate.
3. Measurement mode of continuous measurement and single measurement.
4. It has two working modes: direct mode and group mode.
5. There are five statistics: average, MAX Maximum, MIN Minimum, number of tests, and Standard Deviation.
6. Provide a test piece calibrating, two test pieces calibrating and five test pieces calibrating and other Calibration methods.
7. With storage function, 1560 Measured values can be stored.
8. With deletion function, suspicious data or all stored data can be deleted.
9. Limit can be set. Measured value will be alarmed automatically.
10. With the ability to communicate with a PC, it can transmit data.
11. There is a beep prompt during the operation.
12. There is a bright LED backlight display, which is convenient to use in a gray environment with rays of light.
13. There are two shutdown methods: manual shutdown and automatic shutdown.
Principle
This instrument uses magnetic and eddy current thickness measurement methods. Magnetic method (F-type probe): When the probe is in contact with the cover layer, the probe and the magnetic metal substrate form a closed magnetic circuit. The existence of the nonmagnetic cover layer changes the magnetoresistance. The thickness of the cover layer can be derived by measuring its change. Eddy current method (N-type probe): An electromagnetic field is generated in the coil by using a high-frequency alternating current. When the probe is in contact with the cover layer, the metal substrate generates eddy Current and generates a feedback effect on the probe coil. The thickness of the cover layer can be derived by measuring the size of the feedback effect.
Applications
Manufacturing, metal processing, chemical industry, commodity inspection and other testing fields
Standards
GB/T 4956-1985 nonmagnetic coating thickness measurement on magnetic metal substrates, magnetic method, GB/T 4957-1985 nonconductive coating thickness measurement on nonmagnetic metal substrates, eddy current method, JB/T 8393-1996 magnetic and eddy current coating Thickness measurement instrument, JJG 889-95 "Magnetoresistive Thickness Gauge", JJG818-93 "eddy Current Thickness Gauge"
Steps
1. Select the appropriate probe (magnetic method F type or eddy current method N type) according to the measurement substrate.
2. Turn on, select Measurement mode (continuous or single) and Work mode (direct or group).
3. Use the test piece to calibrate the instrument (one test piece, two test pieces or five test pieces can be calibrated).
4. Place the probe vertically on the surface of the coating to be tested for measurement.
5. View measurement results and statistics (such as average, MAX Maximum, etc.).
6. Data storage or transmission to PC via communication function.
7. After use, choose manual or automatic shutdown.
Notice
• Make sure that the probe is in vertical contact with the coating surface during measurement.
• Ambient Temperature is 0~ 40 ℃, relative humidity is 20~ 90% RH.
• Minimum radius of curvature measurement: convex 1.5mm, concave 9mm.
• The minimum measurement area diameter is φ 7mm.
• The minimum critical thickness of the substrate is 0.5mm.
• Be careful to choose the probe type correctly according to the substrate material (magnetic or nonmagnetic) and cover properties (nonmagnetic or nonconductive).
• Measurement accuracy is regularly calibrated using standard specimens.
• Avoid use in strong electromagnetic interference environments.
• Please use the specified 2 * 1.5V power supply.
When storing data, please pay attention to classification to avoid data confusion.
