Coating thickness gauge
BCT-110 split dual-purpose coating thickness gauge
采用了磁性和涡流两种测厚方法，带线的探头可测一些凹槽面，铝合金窗外不好测的位置，测量阳极氧化数据非常稳定，是您的不二选择。 The BCT-110 split iron and aluminum dual-use coating thickness gauge uses two methods of magnetic and eddy current thickness measurement. The probe with a line can measure some grooved surfaces, and the position outside the aluminum alloy window is difficult to measure. The measurement of anodizing data is very Stability is your only choice.
Measuring range 0-1250um
Power supply: Two AA batteries
Measurement accuracy error Zero calibration ± (1 + 3% H); two-point calibration ± [(1% ～ 3% H)] H + 1.5
Relative humidity ≤85%
Minimum substrate 10 * 10mm
Minimum curvature convex: 5mm; concave: 5mm
Thinnest substrate 0.4mm
Weight 115 g (with battery)
110mm * 65mm * 30mm
BCT-110 split iron and aluminum dual thickness gauge meets the following standards
GB / T 4956─1985 Magnetic method for measuring the thickness of non-magnetic coatings on magnetic metal substrates
GB / T 4957─1985 Eddy current method for measuring the thickness of non-conductive coatings on non-magnetic metal substrates
JB / T 8393─1996 Magnetic and eddy current type coating thickness measuring instrument
JJG 889─95 "Reluctance Thickness Gauge"
JJG 818─93 "Eddy current thickness gauge"
的产品特点 Product Features of BCT-110 Split Iron and Aluminum Coating Thickness Gauge
Both magnetic and eddy current thickness measurement methods are used, which can measure the thickness of non-magnetic coatings on magnetic metal substrates and the thickness of non-conductive coatings on non-magnetic metal substrates; both single-point calibration and two-point calibration can be used. Methods The instrument is calibrated, and the system error of the measuring head can be corrected by the basic calibration method to ensure the accuracy of the instrument during the measurement process; it can quickly and automatically identify the iron substrate and non-ferrous substrate with the power supply undervoltage indication function. Buzzer alert; there are two shutdown methods: manual shutdown mode and automatic shutdown mode; there is a negative number display function to ensure the calibration accuracy of the instrument at the zero point; there is a function to display the average value, maximum value, minimum value [*]
Both magnetic and eddy current thickness measurement methods are used to nondestructively measure the thickness of non-magnetic coatings (such as aluminum, chromium, copper, enamel, rubber, etc.) on magnetic metal substrates (such as steel, iron, alloys, and hard magnetic steels). Paint, etc.) and the thickness of non-conductive coatings on non-magnetic metal substrates (such as copper, aluminum, zinc, tin, etc.) (such as enamel, rubber, paint, plastic, etc.).
a) Magnetic method (F-type measuring head)
When the measuring head is in contact with the covering layer, the measuring head and the magnetic metal substrate form a closed magnetic circuit. Due to the existence of the non-magnetic covering layer, the magnetic resistance of the magnetic circuit is changed. The thickness of the covering layer can be derived by measuring the change.
b) Eddy current method (N-type measuring head)
An high-frequency alternating current is used to generate an electromagnetic field in the coil. When the measuring head is in contact with the covering layer, an eddy current is generated on the metal substrate and a feedback effect is generated on the coil in the measuring head. The covering layer can be derived by measuring the magnitude of the feedback effect thickness of.
Instructions for BCT-110 split iron and aluminum dual thickness gauge
1) Power on
After pressing the ON key, the instrument hears a beep. After the parameter settings before the last shutdown are automatically restored, 0.0 μm will be displayed and the instrument enters the state to be tested. The workpiece can be measured. After a period of non-use, the instrument will automatically shut down.
2) Shut down
Without any operation, the instrument will automatically shut down after about 3 minutes. Press the "ON" button once to shut down immediately.
3) Unit system conversion (Metric and English conversion)
In the state to be measured, press μm / mil to convert its measurement unit.
a) Prepare the parts to be tested
b) Whether the instrument needs to be calibrated, and if necessary, select an appropriate calibration method to perform (refer to 4 Instrument Calibration)
c) Quickly touch the measuring head perpendicular to the test surface and gently press the positioning head of the measuring head. With a beep, the screen displays the measured value, and the instrument will automatically sense the measured substrate: When it senses that it is a magnetic substrate, the instrument displays Fe. The instrument displays NFe when it is a non-magnetic metal. Always keep the instrument in a vertical state when measuring! Lift the measuring head for the next measurement;
Affecting factors of BCT-110 split iron and aluminum dual thickness gauge
a) Base metal magnetic
The thickness measurement by the magnetic method is affected by the magnetic change of the base metal (in practical applications, the magnetic change of low carbon steel can be considered to be slight). In order to avoid the influence of heat treatment and cold working factors, a material with the same properties as the base metal of the test piece should be used. The standard sheet is used to calibrate the instrument; the test specimen to be coated can also be used for calibration.
b) Electrical properties of base metal
The conductivity of the base metal affects the measurement, and the conductivity of the base metal is related to its material composition and heat treatment method. Calibrate the instrument using a standard sheet with the same properties as the test specimen base metal.
c) Base metal thickness
Each instrument has a critical thickness of the base metal. Above this thickness, the measurement is not affected by the thickness of the base metal.
d) Edge effect
This instrument is sensitive to sudden changes in the surface shape of the test piece. Therefore, it is not reliable to measure near the edge or inside corner of the test piece.
The curvature of the test piece has an influence on the measurement. This effect always increases significantly as the radius of curvature decreases. Therefore, measurement on the surface of a curved test piece is unreliable.
f) Deformation of the test piece
The measuring head deforms the soft cover test pieces, so reliable data is measured on these test pieces.
g) Surface roughness
The surface roughness of the base metal and the cover has an influence on the measurement. As the degree of roughness increases, the effect increases. Rough surfaces can cause systematic and occasional errors. Each measurement should increase the number of measurements at different locations to overcome this occasional error. If the base metal is rough, you must also calibrate the zero point of the instrument on several uncoated base metal specimens with similar roughness; or dissolve and remove the cover with a solution that does not corrode the base metal, and then calibrate the instrument. Zero.
h) Magnetic field
The strong magnetic fields generated by various electrical equipment around it will seriously interfere with the thickness measurement of the magnetic method.
i) Attached substances
This instrument is sensitive to those attached substances that prevent the measuring head from coming into close contact with the surface of the cover. Therefore, the attached substances must be removed to ensure that the measuring head of the instrument is in direct contact with the surface of the test piece.
j) Measuring head pressure
The amount of pressure exerted by the measuring head on the test piece will affect the reading of the measurement. Therefore, keep the pressure constant.
k) Orientation of the measuring head
The placement of the measuring head has an influence on the measurement. During the measurement, the measuring head should be kept perpendicular to the sample surface.
BCT-110 split iron and aluminum dual-purpose thickness gauge should be observed when using
a) N base metal properties
For the magnetic method, the magnetic properties and surface roughness of the base metal of the standard sheet should be similar to the magnetic properties and surface roughness of the base metal of the test piece.
For the eddy current method, the electrical properties of the base metal of the standard sheet should be similar to those of the base metal of the test piece.
b) Base metal thickness
Check whether the thickness of the base metal exceeds the critical thickness. If not, use one of the methods in 3.3) for calibration.
c) edge effects
Measurements should not be made close to sudden changes in the test piece, such as edges, holes, and corners.
It shall not be measured on the curved surface of the test piece.
e) Number of readings
Usually because the instrument's readings are not exactly the same, several readings must be taken in each measurement area. Local differences in the thickness of the cover also require multiple measurements in any given area, especially when the surface is roughed.
f) Surface cleanliness
Before measurement, remove any attached substances on the surface, such as dust, grease, and corrosion products, but do not remove any covering materials.
Maintenance and repair of BCT-110 split iron and aluminum dual thickness gauge
1 Environmental requirements
Strictly avoid collisions, heavy dust, humidity, strong magnetic fields, and oil pollution.
2 Replace the battery
When the instrument is in use, when the battery voltage is too low, that is, the battery logo on the screen is empty, the battery should be replaced as soon as possible. When replacing the battery, pay particular attention to the positive and negative polarities of the battery installation.
1) Replace the battery
Remove the battery when the instrument is not used for more than 5 days. When the instrument shows a low voltage prompt, the battery should be replaced. Please pay attention to the polarity when replacing the battery.
2) Restore factory settings
In the power-on state, press the keys, ▲, ▲, ▼, ▼ in sequence within 2 seconds. The English dialogue appears on the screen asking if you want to confirm the factory reset. To perform the factory reset, select “” and press μm / mil to confirm.