
55
(See Tables 7 and 8 for X times)
Figure 17. Default Continuous Pressure Reading Timing Diagram
For continuous pressure reading commands (
P2
and
P4
) and an
IC=1
setting, the HPB internal times and
the output timing are shown Figure 18.
7.0 TIMING DIAGRAMS
For the factory default settings, the HPB will respond to a
P1
or
P3
pressure reading with an integration time of
200 msec at 9600 baud data output. The timing for this is shown Figure 16. The command input time,
Y
, is the
transmission time for the command message. This is equal to the number of command characters plus the
<cr> character, times the baud transmission time per byte (
*01P1
<cr> = 6 x (byte times)). The integration and
calculation times are internal HPB times. The integration time is user controlled with the
I=
command. The digital
pressure reading output time,
X
, is the reply transmission time. Character, byte or transmission times for different
baud rates are listed in Table 7. Reply character lengths,
X
, are listed in Table 8.
(See Tables 7 and 8 for X times)
Figure 16. Default Single Pressure Reading Timing Diagram
When I=Mn mode or I=R30 (or less) mode:
For continuous pressure reading commands (
P2
and
P4
), the HPB internal times and the output timing
are shown Figure 17.
Digital Pressure Reading Output
X msec
Command Input
Y msec
0-1 byte
Digital Pressure Reading Output
Integration period
Calculation
200 msec
10 msec (nom.)
. . .
. . .
. . .
200 msec
200 msec
200 msec
X msec
16.7 msec
(See Tables 7 and 8 for X times)
Figure 18. Continuous Pressure (with IC = 1) Timing Diagram
Digital Pressure Reading Output
Integration period
Calculation
200 msec
10 msec (nom.)
. . .
. . .
. . .
200 msec
400 msec
X msec
16.7 msec