LTI TruSense S300 Series Integration Manual 3nd Edition
Page 44
Copyright © [2016] Laser Technology, Inc. All Rights Reserved. Unauthorized duplication, in whole or in part, is strictly prohibited.
2.
the current measurement update period (
„
m
‟
in
“
$GO,n,m
”
–
in tenths of seconds)
3.
the current warm-up period (
“
aXWn!
”
or
“
$WU
”)
4.
the current scan mode (
“
$L
S”)
Note
:
Not used in Liquid mode.
5.
the current P.P.M. value divided by 4 (
“
$OP
”)
Note: Not used in Liquid mode.
6.
the current measurement mode (
“
$MM
”)
Note: Must be 4 in Liquid mode.
“aXAn!” Set Measurement Mode
This LTI-proprietary SDI-12 extended command configures measurement mode. This corresponds to the
“
$MM,n
”
serial command.
IMPORTANT:
For Liquid measurement the serial command must be set to
“
$WU,4
”
.
Command:
Example:
8XA4!
8MM4<CR><LF>
The sensor is set to measurement mode 4 (Liquid
Mode)
Note: Sending
“
aXA!
”
(without the
„
n
‟
value) can be used to query for the current measurement mode setting.
“aXBn!” Set Liquid Filter Mode
This LTI-proprietary SDI-12 extended command configures the first parameter of the Liquid Setting. This
corresponds to the first parameter of the
“
$OS,f,z,0,y
”
serial command.
Command:
Example:
8XB2!
8B2<CR><LF>
The sensor is set to liquid filter mode 2 (Liquid
filter median)
Note: Sending
“
aXB!
”
(without the
„
n
‟
value) can be used to query for the current measurement mode setting.
“aXCn!” Enable/Disable Auto-Start Mode
This LTI-proprietary SDI-12 extended command enables or disables auto-starting of continuous
measurements by the S300/S310 sensor. To obtain measurement data with the
“
aRn
”
continuous
measurements commands, the S300/S310 sensor must have its auto-start mode enabled. The
S300/S310 sensor will reset after its auto-start mode is changed. This corresponds to the
“
$MA
,n”
serial
command.
Command:
Example:
8XC1!
81<CR><LF>
The sensor
’
s auto-start mode has been enabled.
aXAn!
Response:
an<CR><LF>
where:
a
= specified sensor
’
s current SDI-12 address
XA
= Set Measurement Mode extended SDI-12 command
n
= the number of initial discarded measurement laser firings (1
to 99)
!
= SDI-12 command termination character
aXBf!
Response:
an<CR><LF>
where:
a
= specified sensor
’
s current SDI-12 address
XB
= Set Liquid Filter extended SDI-12 command
f
= Lowpass filter = 1 and Median filter = 2
!
= SDI-12 command termination character
aXCn!
Response:
an<CR><LF>
where:
a
= specified sensor
’
s current SDI-12 address
XC
= Enable/Disable Auto-Start Mode extended SDI-12 command
n
= enable/disable value (
„
0
‟
= disable, non-0 = enable
–
responds
with
„
1
‟
)
!
= SDI-12 command termination character
