beautypg.com

DeFelsko PosiTector 6000 v.7.3 Full Manual User Manual

Page 40

background image

37

There are 5 types of coating thickness standards available:

Certified Coated Metal Plates are the best solution for verifying
the calibration, accuracy and operation of most magnetic, eddy
current or ultrasonic coating thickness gages including magnetic
pull-off gages as well as many competitive models. They fulfill both
ISO and in-house quality control requirements. At ±0.43µm
(±0.017 mil) Certified Coated Metal Plates are the most accurate
solution.

Certified Polystyrene Blocks are for use with gages that
measure over 1500 µm (60 mils).

Certified Plastic Shims (foils) provide an economical alternative
to coated metal plates. They have a reduced accuracy of ±2 µm
(±0.08 mil). A coating thickness Gage measures shim thickness
when this shim is placed over a smooth metal surface (zero plate).

Non-Certified Plastic Shims (foils) provide a quick operational
check of the Gage and they allow the user to perform practice
measurements when placed over metal. They protect the probe
from damage or premature wear when placed over hot or abrasive
surfaces, and they can be placed on top of soft or tacky coating
films to obtain thickness measurements without the Gage probe
depressing the coating film. A set of 5 shims is included with every
PosiTector 6000.

Zero plates are uncoated steel or aluminum disks. A zero plate is
included with most coated metal sets. The first Gage measurement
is on a zero plate to verify that the Gage measures zero correctly.
Electronic gages can usually be adjusted to “0” if necessary. A zero
plate is also a convenient base onto which a plastic shim or
polystyrene block can be placed for measurement. Zero plates are
also used to provide a substrate where none exists. Large sheets
of material such as paper, plastic, fabric and rubber can be
measured with a coating thickness Gage by placing the material
over the zero plate. This is useful when the measured item is too
large to access with a micrometer or other device.

For more information, see www.defelsko.com/standards.