One, overview

This instrument used magnetic, Eddy two species measuring thick method, can no injury to detection magnetic metal jitie (as: iron, steel, alloy and hard magnetic steel,) Shang non-magnetic covered layer of thickness (as: zinc, aluminum, chrome, copper, rubber, paint,) and the non-magnetic metal matrix (as copper, aluminum, zinc, Tin,) this instrument widely to application Yu all metal surface coating.

1) This instrument complies with the following standards

GB/T 4956-1985 Thickness of non-magnetic coatings on magnetic substrates measurements (magnetic method)

GB/T 4957-1985 Non-conductive coatings on non-magnetic substrates thickness measurement (Eddy)

JB/T 8393-1996 Magnetic and Eddy current type coating thickness thickness gauge

2) Features

Portable design, Palm size

Using high speed DSP Chip has a fast measurement capability

The user-friendly design, simple operation.

Double probe with automatic recognition of ferrous and non-ferrous material, no manual conversion

Two calibration methods, calibrate the zero point and two-point calibration

Wide angle LCD Liquid crystal display

Metric and imperial units

With low supply voltage alarm

Procedure beep tips

Automatic power off function

3)Measuring principle

a)Magnetic method

When the probe contact with coatings, the measuring head and magnetic substrates form a closed magnetic circuit, due to the presence of non-magnetic coatings, bring about changes in the magnetic circuit reluctance, by measuring the amount of change, measuring the coating thickness.

b)Eddy current method

Coil uses high frequency alternating electric current produces a magnetic field, when the measuring head and the metal contact, on metal substrates produce eddy currents, and the head has a feedback through the feedback effect of coating thickness can be measured.

Second, the display shows

● Μ-m/mil unit of measure

● CAL Calibration tip

● Fe Measurement of magnetic substrate

● NFe Measurement of non-magnetic substrate

● 8.8.8.8 Measuring thickness display

● Low supply voltage alarm

Three, instructions for use

1) Boot

After the ON button is pressed the instrument heard a ringing, instrument number GO8100 is displayed on the screen. Automatic parameter settings before restoring the last shutdown, displays 0, instrument into the test status. Measuring the artifacts. After a period of time, do not use the instrument will automatically shut down.

2) Measurement

Instrument sensors measured substrate: induction is the magnetic matrix instrument display Fe; Induction to the non-magnetic metal instrument display NFe. When measuring, please always keep the instrument in a vertical position!

3) The zero calibration

Test conditions the probe vertically on the Board, appears on the screen after ﹤ ╳. ╳Μ m ﹥ and zero calibration press the 'ZERO' key. In the probe has been pressed on a substrate in the process until the screen displays (0 CAL) can only be filed after the probe. Repeat zero calibration to obtain more precise zero point.

Note: we provide Al and Fe films due to the material and the substrate is not identical to that of your zero is not the same, so the scientific method is in your actual zero calibration on the smooth surface of the workpiece!

4) Two-point calibration

4.1 First calibration of zero position. Method with the zero calibration.

4.2 The standard membrane block party on the Board, using instruments to measure its value. If the measured value on the display is different from standard diaphragm, you can use the ▲, to modify the read value so that it meets the standards. Calibration complete, you can begin to measure. Using ▲, correct reading values filed probe

Four technical parameters

● Measuring range: 0-3000um

● Power supply: two fifth battery

● Accuracy of measurement error: zero point calibration ± (1.5+3%H); Two-point calibration ± "(1%~ 3%H)" H+1.5

● Ambient temperature 0-40 ℃

● Relative humidity 85%

● Minimum matrix 10*10MM

● Minimum curvature convex 5mm au 5mm

● The thin substrate: 0.4mm

● Weight: 240 g (with battery)

● Size 150mm*74mm*32mm

Five measurement considerations

a)Base metal properties

For magnetic method, standard magnetic and surface roughness of the base metal, and sample matrix similar to magnetism and surface roughness.

Eddy current method, standard the base metal properties should be similar to the metal electrical properties of the specimen.

b)Thickness of base metal

Check that the base metal thickness is more than critical thickness, if not, after calibration, you can measure.

c)Edge effect

Specimens should not close to mutations, such as edges, holes and angle measure.

d)Curvature

Should not be measured on the curved surface of the specimen.

e)Read a few times

Usually because the instrument readings are not exactly the same every time, so must each take several readings within the measuring area. Local coating thickness differences are required within any given area of the repeated measurement, surface rough and even more so.

f)Surface cleanliness

Before the measurement, should clear the surface of any attached materials such as dust, grease and corrosion products, but do not remove any covering material.

g)Magnetic field

Around electrical equipment would seriously interfere with the magnetic field produced by magnetic thickness

h)Sensor orientation

Probe placed on the measurement of affect measurement should be perpendicular to the workpiece