World Patents Pending ©AirSense Technology Ltd. 1999
ISSUE 2.4
Page 46
T E C H N I C A L
.
M A N U A L
Refer to “Programming Function 47” for more information on this setting. The chart
recorder display automatically adjusts the time display for different sample rates.
action
command
select detector d
0x44 0x7f + d (uppercase D character)
read function f value
0x52 0x7f + f (uppercase R character)
write function f with value v
0x57 0x7f + f 0x7f +v (uppercase W character)
Chart recorder
sample rates
n
For a selected sampling period the highest reading taken during that period is
stored.
n
For a multiple detector system all detectors have their readings stored. The
maximum duration is divided by the number of detectors.
n
Changing the sample rate will clear the data in the chart log
NB
+
Setting
Sampling period Maximum duration
(time between samples) (hours)
0
no sampling
0
1
10 second
5
2
3 minute
9
3
10 minute
30
1.2 days
4
50 minute
150
6.2 days
5
200 minute
600
25 days
The following strings allow programming of the functions. These commands are
preceded by ‘>’ (0x3e). The command string should be terminated with a CR
character (0x0d). Note that to prevent the command string being terminated by a
0x0d in the command being interpreted as end of string all binary parameter values
have 0x7f (127 decimal) added to them. Invalid values for detector, function or value
are ignored.
