GHM Delta OHM HD52.3D Series, Руководство по эксплуатации

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HD52.3D…
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V2.2
Command Reply Description
RWaM & n| Reads the method for the calculation of the
average speed and average direction set in
the instrument
CCn
note: command available
from firmware version 2.06
&| Enables/disables the compass compensation
of wind speed and direction:

Disables if n=N

Enables if n=Y
Default : Enabled (n=Y)
CRTnnnn &| Sets the resolution of the rain gauge tipping
bucket to nnnn value (in µm)
Value should range within 50 and 1599 µm
Default : 200 (= 0.200 mm)
RRT & nnnn| Reads the rain gauge resolution value set in
the instrument (in µm)
N
OTE
3 : W
IND SPEED THRESHOLD VALUE
If the wind speed is very low, the determination of the direction can result inaccurate. The in-
strument allows setting the threshold value of speed below which the direction value is frozen
on the last acquired value.
N
OTE
4 : W
IND DIRECTION EXTENDED CHARACTERISTIC
With 0÷359.9° wind direction measuring range, the analog output continues to oscillate be-
tween maximum and minimum scale if the direction continues to slightly fluctuate around 0°:
This effect can be reduced through the extended ("wrap-around") characteristic of wind direc-
tion. In this mode, the wind direction is considered as corresponding to 0÷539.9° range in-
stead of 0÷359.9°. The wide output fluctuation occurs the first time that the wind direction
goes from 0 to 359.9°; if later the “physical” direction goes back to 0°, the analog output will
always remain around 360°. Using the extended characteristic, the behavior of the above
graph changes into the following: