Checkline PT-200 - Manual (Page 2)

2
Introduction Introduction
Power-up / Power-down Power-up / Power-down
The PosiTector 200 powers-up when any button is
pressed. To preserve battery life, the Gage powers-
down after approximately 3 minutes of no activity. All
settings are retained.
Throughout this manual, the symbol
indicates more information about the particular topic
or feature is available on our website.
NOTE:
The PosiTector 200 is a hand-held Coating
Thickness Gage that uses a non-destructive
ultrasonic principle to measure coating thickness on
a wide variety of substrates.
The PosiTector 200 probe emits a high frequency
sound pulse that travels into the coating via a
coupling gel and reflects from ANY surface that is
different in density. Coating thickness readings are
obtained by measuring the time taken for the
ultrasonic signal to propagate from the probe to the
coating/substrate interface and back. The travel time
is divided by two and multiplied by the velocity of
sound in the coating to obtain the thickness of the
coating.
Couplant Probe
Coating 1
Substrate
Coating 2
The PosiTector 200
interprets the largest
“echo” within the
Gates as the
coating/substrate
echo.