MicroLinks UM12 - user manual - Manual (Page 50)

Microscope Software manual http://www.ViTiny.com
50
Copyright © 2008-2014 MicroLinks Technology Corp.
Fig 5-31 Calibrator
a. Concentric Circles:
Concentric Circles is to see if the ratio is correct. If Concentric Circles does not form as circle
(became like Oval,,etc) means the screen ratio is not 4:3. Place the Concentric Circles directly
onto PCB drilling hole, See Fig 5-31a, no matter black line or white space size is 1mm. First circle
(black dot) diameter is 1mm, second circle(white space) is 3mm, third circle(black line) is 5mm, the
forth circle is 7mm..,etc. The diameter can be measured from the concentric circle scale.
Diameter: 3.00mm
Fig 5-31a way to use Concentric Circles
b. 1mm Low Magnification Grid:
Low mag Grid is used for calibrate the low magnification, wider field. It can also used to check
the ratio, if the square does not form as square means the screen ratio is not 4:3. To place the grid
on the object as the bill Fig.5-31b, the length for each square is 1mm.
Fig 5-31b way to use Low Magnification Grid