Sekonic SR-450, Руководство по эксплуатации

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(4) Communication control method
This device has the following two unreceivable states. In these states, set the communication timing
by the host computer.
1. Due to half-duplex communication, data reception is disabled while the device is sending data.
2. Data reception is disabled while the device is executing a command or the internal communica-
tion buffer is full.
The device notifies this state using an RS signal.
(5) Control line level
CS: The device sends data when this signal is at the high level.
RS: The device outputs low-level RSs in the unreceivable state.
DR: The device outputs high-level DRs while the power is turned on.
Signal level
High: +3V to +12V
Low: -3V to -12V
The following signals are only available to use RS-232C connection.
(6) Signal name and pin connection
la n g i S
r et u p m o c la n r et x E
n o it c e ri d la n g i S
e ci v e d si h T
la n g i S n i n P i P la n g i S
) D N G (
) d n e s o t at a D (
) e v ie c e r o t at a D (
) d n e S o t ts e u q e R (
) d n e S o t r a el C (
) y d a e R te s at a D (
) D N G la n g i S (
G F
D S
D R
S R
S C
R D
D N G
1
2
3
4
5
6
7
1
2
3
4
5
6
7
G F
D R
D S
S C
S R
R D
D N G
6.Connection to Computer 7. How to Enter Mark
7. How to Fill in Mark
(1) Dimensions of mark : Width = 3.5 to 5.0mm
Thickness = 0.4mm or more
(2) Writing implements :
(3) Density : PCS = Min. 0.7 (*1)
(4) Typical entries
Note:
When using a mechanical pencil, be sure to fill in 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
Good No good
For infrared ray ： Pencil of HB or softer, mechanical pencil
For visible ray ： the above, ball-point pen
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