Sekonic SR-1800 Operating Manual page 51

SR-1800
Mark to mark type
If the sheet has pre-printed timing marks, the scanning area (reading area) of targeted marks
frames will be determined by such timing marks.
Mark to mark type is a method to read zones between two timing marks. Therefore, the number
of timing marks in mark to mark type forms is always an even number. Other methods include
timing control type and direct under type.
• Mark to mark type • Mark to mark type
(without top-end margin reading): (without top-end margin reading):
The reading zone is the area between The reading zone is the area between
timing marks. timing marks.
• Mark to mark type • Mark to mark type
(with top-end margin reading): (with top-end margin reading):
The reading zones are the front margin of The reading zones are the front margin of
the form as the first row, and between the form as the first row, and between
timing marks as the second and timing marks as the second and
subsequent rows. subsequent rows.
Double-feeding
Refers to two or more sheets being fed at the same time during sheet feeding operation. If such
an error occurs, the device assesses it as a sheet feeding error, and notifies users of the error.
Form
(1) OCR paper (optical character recognition paper)
Paper for data processing to optically read letters and symbols. It should not be dusty, and
it should be smooth, stiff, abrasion resistant, and antistatic.
JIS X 9004 (printing specifications for optical character recognition)
(2) Quality paper
Paper made from pure chemical pulp. Used for printing and writing.
JIS P 3101 (printing paper) JIS P 3201 (writing paper)
(3) Paper weight
Paper is categorized by weight.
0
Reading zone Reading zone
Between timing marks Between timing marks
2.5mm 2.5mm
Reading zone (first row) Reading zone (first row)
Top margin Top margin
Reading zone Reading zone
(second and subsequent rows) (second and subsequent rows)
Between timing marks Between timing marks