Manual – Starflow QSD Model 6527B and 6537A
Unidata Manual - 6527B and 6537A Starflow QSD User Manual 08 05 2023.docx
Page 18
5.1.1. Channels Table
The Starflow QSD has a list of data registers within the instrument that are re-mapped to
SDI-12 channels. These SDI-12 parameters are assigned to the Channels, and their order of
return can be configured using SDI-12 eXtended commands. The channel allocation is
shown in the below table:
Channel Description
Units
Example
Meaning
0
Water Temperature
1/10 ºC
+152
15.2ºC
1
Battery Voltage
1/100 Volts
+1302
13.02Volts
2 Ultrasonic
Depth
mm +123
123mm
3
CW Water Velocity
+/- mm/s
-234
234mm/s -ve flow
4
RSSI (signal level)
no units
+66
66 (no units)
5
Signal Spread
no units
+45
45 (no units)
10
X-Axis Tilt
+/- deg
-9
9 deg left tilt
11
Y-Axis Tilt
+/- deg
7
7 deg forward tilt
12
Pressure Depth
+/- mm
+123
123mm
13
Barometric Reference
+ mm
+10120
10120mm
70 Conductivity
(UC) µS/cm +2350
2350µS/cm
72
Conductivity (TC)
µS/cm
+2350
2350µS/cm
5.1.2. Measurement Command (aM!)
6527B/6537A Starflow QSD measures several parameters available for collection by a data
logger. The default configuration returns nine parameters using the
aM!
command. Other
sets of parameters are also available using the
aMx!
commands.
Example 1: aM!
Parameter Description
Units
Example
Meaning
1
Water Temperature
1/10 ºC
+152
15.2ºC
2
Battery Voltage
1/100 Volts
+1302
13.02Volts
3 Ultrasonic
Depth
mm
+123
123mm
4
CW Water Velocity
+/- mm/s
-234
234mm/s -ve flow
5
RSSI (signal level)
no units
+66
66 (no units)
6
Signal Spread
no units
+45
45 (no units)
7 Conductivity
(TC)
µS/cm
+2350
2350µS/cm
8
Pressure Depth
+/- mm
+123
123mm
9
Barometric Reference
+ mm
+10120
10120mm
Start Measurement Command (aM!) example:
0M! 00059 <CR><LF> (Measurement ready in 5 seconds and nine parameters available)
0D0! 0+152+1302+123+234+66+45+2340+123+10120 <CR><LF>
