Table 26 Precipitation Parameters Bits 9-16
Bit Description
9th bit Rc Rain amount
10th bit Rd Rain duration
11th bit Ri Rain intensity
12th bit Hc Hail amount
13th bit Hd Hail duration
14th bit Hi Hail intensity
15th bit Rp Rain peak
16th bit (most
righ
t)
Hp Hail peak
Parameter Description
[I]
Update interval: 1 … 3600 seconds. This interval is valid only if the [M] field is = T
[U]
Precipitation units:
M= metric (accumulated rainfall in mm, Rain duration in s, Rain intensity in mm/h)
I
= imperial (the corr
esponding parameters in units in, s, in/h)
[S]
Hail units:
M = metric (accumulated hailfall in hits/cm2, Hail event duration in s, Hail intensity in hits/
cm2h)
I
= imperial (the corresponding parameters in units hits/in2, s, hits/in2h), H = hits (hits, s,
hits/h) Changing the unit resets the precipitation counter.
[M]
Auto-send mode: R = precipitation on/o,
C = tipping bucket, T = time based
R = precipitation
on/o: The transmitter sends a precipitation message 10 seconds after the
first recognition of precipitation. Rain duration Rd increases in 10 s steps. Precipitation has
ended when Ri = 0. This mode is used for indication of the start and the end of the
precipitation.
C= tipping bucke
t: The transmitter sends a precipitation message at each unit increment (0.1
mm/0.01 in). This simulates conventional tipping bucket method.
T= time based: Transmitter sends a precipitation message in the intervals defined in the [I]
field. Do not use the auto-send mode tipping bucket in polled protocols as it decreases the
resolution of the output (quantized to tipping bucket tips).
Chapter 8 – Sensor and Data Message Settings
129
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