How To Enter Mark - Sekonic SR-430 Operatiing Manual

7. How to Enter Mark

(1) Dimensions of mark
(2) Writing implements
(3) Density
(4) Typical entries
Note:
When using a mechanical pencil, be sure to enter a mark with enough density.
(*1)
PCS = Printed Contrast Signal
It refers to the contrast in reflectance of a printed mark, symbol or letter against the non-printed
part of paper. It is calculated as follows:
PCS = (white reflectance - black reflectance)/white reflectance
: Width = 3.5 to 5.0mm
Thickness = 0.4mm or moe
: Pencil of HB or softer, OCR marker, mechanical pencil
(infrared visible light specifications: The above + ball-point pen)
: PCS = 0.7 min. (*1)
-25-
7. How to Enter Mark