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Chapter one introduction
一. Features of instrument:
VICTOR 852A coating thickness gauge is the fruit of high
technology. It applies to the single chip microcomputer technology.
It has high precision, digital display, stable indication and low
power consumption. It can be easily operated and the keys should
be pressed by touch. With a small volume and light weight, it
provides sing probe full range measurement. It also has such
functions as storing, reading, statistic, low-power indication,
system/zero-scale/two-point calibration. Its properties have
reached the international advanced levels of contemporary
instruments of the same kind.
二. Application scope:
This instrument applies to the magnetic thickness gauging method.
It can measure the thickness of non-magnetic coating on
ferromagnetic materials conveniently and without any damage. For
example, it can measure the thickness of the zinc, copper,
chromium, paint, enamel, fiberglass, sprayed plastic, asphalt.etc.
on the surface of steel. This instrument is widely applied in
mechanical, car, shipbuilding, petroleum, chemical, electroplating,
spray plastic, enamel, plastic etc. industries.
三．Working principles:
VICTOR 852A coating thickness gauge applies to electromagnetic
induction method. The probe located on the surface of the
instrument can produce a closed magnetic loop. With the change of
the distance between the probe and the ferromagnetic material, the
magnetic loop will change to different degrees and so the
magnetoresistance and probe coil inductance change. With this
