Lufft SHM31 User Manual

Communication in SDI-12 mode
Snow depth sensor SHM 31, V2.1 45
10.6.1. Example: C and M queries of the SHM 31-UMB
0M! or 0C!
00008<CR><LF>
8 measurement values available for immediate
retrieval
0D0!
0+2346+0.1000+45.7-2.8<CR><LF>
0+2346+0.0+0.0+0.0<CR><LF>
Time stamp 2346sec, snow depth 0.1m,
block temperature 45.7°C,
ambient temperature -2.8°C
If “MEN” has been set (MeasurementEnd, 10.11.3)
0D1!
0+51.5+12+11.9+0<CR><LF>
0+0.0+0+0.0+67<CR><LF>
Laser temperature 51.5°C, normalised signal 12,
tilt angle 11.9°, SHM31 error status 0
If “MEN” has been set (MeasurementEnd, 10.11.3)
10.
6.2. Buffer assignment – basic data – SHM 31-UMB
Measurement Value
UMB-Channel
Min
Max
Unit
Puffer ‘0’
Run time
4007
0
9999999
Sec
Snow depth (cur)
608
-16.0000
16.0000
m
Block temperature(cur)
100
-40,0
100,0
°C
Ambient temperature(cur)
108
-50,0
100,0
°C
Puffer ‘1’
Laser temperature (cur)
120
-60,0
80,0
°C
Signal normalised (cur)
800
0
255
-
Tilt angle (cur)
500
-180,0
180,0
°
SHM31 error
4100
0
255
code
Table 5: SDI-12, device configured for measurements in metric units
Example: Query buffer ‘0’: 0+2346+0.1000+45.7-2.8<CR><LF>
Timestamp 2,346 sec, snow depth 0.1 m, block temperature 45.7°C, ambient temperature-2.8°C
Measurement Value
UMB-
Channel
Min
Max
Unit
Puffer ‘0’
Run time
4007
0
9999999
Sec
Snow depth (cur)
612
-626.9
629.9
inch
Block temperature(cur)
104
-40,0
212,0
°F
Ambient temperature(cur)
112
-58,0
212,0
°F
Puffer ‘1’
Laser temperature (cur)
124
-76,0
176,0
°F
Signal normalised (cur)
800
0
255
-
Tilt angle (cur)
500
-180,0
180,0
°
SHM31 error
4100
0
255
code
Table 6: SDI-12 device configured for measurements in US units

Lufft SHM31 Specifications

General

Brand	Lufft
Model	SHM31
Category	Accessories
Language	English