35
ENGLIS
H
Sequence Check (only OMR)
Sheets in a stack can accidentally get out of
sequence or can be missing. This can be
detected by the system when the sequence
function is used. Each sheet has a number
that forms part of the reading code.
These are the available possibilities:
•
1 mark: pages are numbered 1-2-1-2-1-
etc.
•
2 marks: pages are numbered 1-2-3-4-1-
2-3-4-1-2-etc. (see figure)
•
3 marks: pages are numbered 1-2-3-4-5-
6-7-8-1-2-3-etc.
The table shows examples of sequence check.
-
= Mark printed,
-
= No mark printed
Note
If you use sequence control and the system stopped, you can reset the sequence counter
as follows: press the
(stop) button and press the
Yes
button to confirm.
Parity Mark (only OMR)
By adding a parity mark the reading code can be checked. When the OMR advanced
package is used the sum of the marks has to be even.
Safety Mark (only OMR)
The safety mark is used as an extra security. With
skewed paper the reading head can miss part of the
reading code. In these situations the safety mark is
not read, and the system will give an error.
The safety mark also indicates the end of the
reading code.
This mark must always be present on the document
if it has been activated as an OMR code.
Marks on the sheets:
sheet count
1
2
3
4
5
6
7
8
Sequence check 4 (3 marks used)
- - - -
- - - -
Sequence check 2 (2 marks used)
- -
- -
- -
- -
Sequence check 1
(1 mark used)
-
-
-
-
-
-
-
-
1
A
A
B
B
B
C
C
2
3
4
5
6
7
#1
#2
#3
#4
#1
#2
#3
Normal paper flow
Skewed paper flow
Start mark
Start mark
Safety mark
Safety mark
reading direction
reading direction
