PosiTest PG

• PosiTest PG Leaflet

Is $\text{the}$ $\text{PosiTest}$ $\text{PG}$ $\text{suitable}$ $\text{for}$ $\text{non}$–$\text{metallic}$ $\text{substrates}$ $\text{like}$ $\text{plastic}$ $\text{or}$ $\text{wood}$?

Yes, $\text{the}$ $\text{PosiTest}$ $\text{PG}$ $\text{is}$ $\text{a}$ $\text{destructive}$ $\text{measurement}$ $\text{gauge}$ $\text{that}$ $\text{can}$ $\text{measure}$ $\text{coating}$ $\text{thickness}$ $\text{on}$ $\text{any}$ $\text{rigid}$ $\text{substrate}$, $\text{including}$ $\text{metal}$, $\text{wood}$, $\text{and}$ $\text{plastic}$.

How $\text{do}$ $\text{I}$ $\text{measure}$ $\text{the}$ $\text{thickness}$ $\text{of}$ $\text{individual}$ $\text{layers}$ $\text{in}$ $\text{a}$ $\text{multi}$–$\text{coat}$ $\text{system}$?

The $\text{PG}$ $\text{cuts}$ $\text{a}$ $\text{precise}$ $\text{V}$–$\text{groove}$ $\text{through}$ $\text{all}$ $\text{layers}$. If $\text{the}$ $\text{layers}$ $\text{are}$ $\text{of}$ $\text{contrasting}$ $\text{colors}$, $\text{you}$ $\text{can}$ $\text{use}$ $\text{the}$ $\text{50x}$ $\text{microscope}$ $\text{to}$ $\text{measure}$ $\text{the}$ $\text{width}$ $\text{of}$ $\text{each}$ $\text{individual}$ $\text{layer}$ $\text{at}$ $\text{the}$ $\text{cut}$.

What $\text{do}$ $\text{the}$ $\text{different}$ $\text{cutting}$ $\text{tips}$ $\text{(1x}$, $\text{2x}$, $\text{10x)}$ $\text{represent}$?

The $\text{numbers}$ $\text{refer}$ $\text{to}$ $\text{the}$ $\text{magnification}$ $\text{factor}$ $\text{applied}$ $\text{to}$ $\text{the}$ $\text{cut}$ $\text{profile}$. A $\text{1x}$ $\text{tip}$ $\text{is}$ $\text{for}$ $\text{the}$ $\text{thickest}$ $\text{coatings}$, $\text{while}$ $\text{a}$ $\text{10x}$ $\text{tip}$ $\text{provides}$ $\text{the}$ $\text{highest}$ $\text{resolution}$ $\text{for}$ $\text{very}$ $\text{thin}$ $\text{coatings}$.

Can $\text{the}$ $\text{PosiTest}$ $\text{PG}$ $\text{be}$ $\text{used}$ $\text{on}$ $\text{curved}$ $\text{surfaces}$?

Yes, $\text{per}$ $\text{ASTM}$ $\text{D4138}$, $\text{the}$ $\text{instrument}$ $\text{can}$ $\text{be}$ $\text{used}$ $\text{on}$ $\text{flat}$ $\text{or}$ $\text{moderately}$ $\text{curved}$ $\text{surfaces}$. $\text{Pipes}$ $\text{as}$ $\text{small}$ $\text{as}$ $\text{25}$ $\text{mm}$ $\text{(1″)}$ $\text{in}$ $\text{diameter}$ $\text{can}$ $\text{be}$ $\text{measured}$ $\text{in}$ $\text{the}$ $\text{axial}$ $\text{direction}$.

What $\text{is}$ $\text{the}$ $\text{process}$ $\text{for}$ $\text{determining}$ $\text{the}$ $\text{coating}$ $\text{thickness}$?

After $\text{making}$ $\text{a}$ $\text{clean}$ $\text{cut}$, $\text{you}$ $\text{use}$ $\text{the}$ $\text{microscope}$ $\text{to}$ $\text{measure}$ $\text{the}$ $\text{width}$ $\text{of}$ $\text{the}$ $\text{cut}$. $\text{This}$ $\text{measured}$ $\text{width}$ $\text{is}$ $\text{then}$ $\text{multiplied}$ $\text{by}$ $\text{the}$ $\text{conversion}$ $\text{factor}$ $\text{specific}$ $\text{to}$ $\text{the}$ $\text{cutting}$ $\text{tip}$ $\text{used}$ $\text{to}$ $\text{yield}$ $\text{the}$ $\text{actual}$ $\text{thickness}$.