Table 8-1: SDI-12 measurement commands
SDI-12
command
1
Values returned
Units
Comments
a
M!
,
a
MC!
,
a
C!
,
a
CC!
,
a
R0!
,
a
RC0!
1. Intensity corrected
accumulation (ICA) since last
measurement accumulator
reset
2
2. Number of raw bucket tips
since last measurement
accumulator reset
2
3. Total intensity corrected
accumulation since total
intensity accumulator reset
3
4. Average precipitation intensity
since last measurement
accumulator reset
2
5. Maximum (peak) intensity
since last measurement
accumulator reset
2
1. mm or inch
2. Count
3. mm or inch
4. mm/hr or in/hr
5. mm/hr or in/hr
Each tip event adds to
the tip counter (#2) and
computes the values
described in
Commands reset
measurement
accumulator
a
M1!
1. Supply voltage
2. Temperature
3. Sensor level
4. Time since last measurable
precipitation event
5. Lithium battery voltage
1. VDC
2. °C
3. Degrees from
normal, flat
4. Days
5. VDC
a
MC1!
,
a
C1!
,
a
CC1!
,
a
RC1!
1. Supply voltage
2. Temperature
3. Sensor level
4. Time since last measurable
precipitation event
5. Lithium battery voltage
1. VDC
2. °C
3. Degrees from
normal, flat
4. Days
5. VDC
Commands reset
measurement
accumulator
RainVUE-Series SDI-12 Precipitation Sensors
16