FIEDLER H1, Руководство пользователя

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Hydro Logger H1 User manual
58
electronics for ecology
FIEDLER
Weight pulse = 10 * 750 / (147 * 500) = 0.102 mm/pulse
The long name of this parameter describes its meaning. If no pulse occurs during
the set number of truncated archiving intervals, the rain will be declared com-
plete. The end of the rain must be set in order to determine the start of the next
rain and to allow the unit to return to the base archiving interval. From the start
of each rain (first pulse) H1 automatically calculates the amount of rainfall in
mm into a sum called "SS" and if the preset limit is reached, the station can send
a warning SMS. SMS messages are covered in the chapter 6.8.
Sending a warning message regarding rainfall (but also, for example, the number
of pulses of the propeller flow meters) can also occur when other reasons are
reached:
1. The magnitude of precipitation in the current archiving interval exceeds
the limit [mm].
2. The running total of rainfall continuously calculated for the last X minutes
exceeds the set level [mm].
DYNAMIC CALIBRATION OF THE RAIN GAUGE (LOGGER H2)
Calibrating the rain gauge at different rain intensities can reduce the error of
the measuring boat, which fills differently in dripping water and in heavy rainfall,
when water flows into the boat in an unbroken trickle. The calculation of rainfall
using the dynamic calibration table is only included in the Logger H2 software.
The figure shows
that from a certain
intensity of rain the
weight of each
pulse (the amount
of water needed to
turn the boat over)
increases. Logger
H2 is able to moni-
tor the instanta-
neous rain inten-
sity according to
the time interval
between each pulse and then calculate the actual pulse weight from the
correction table.
LEVEL LOGGER H2 CALIBRATION TABLE
When calibrating the rain gauge, the Logger H2 calibration table must be popu-
lated with pulse weights for different rain intensities (different peristaltic pump
flow rates when calibrating the rain gauge). The pulse weight and the time
between pulses form the columns of the calibration table.
When it rains, the Logger H2 then calculates the actual "Pulse
Weight " in mm of
rainfall using the table and the measured interval between each pulse of the tilt
of the attached rain gauge.
N u m b e r o f
a r c h i v i n g
i n t e r v a l s f o r r a i n
t e r m i n a t i o n
M o r e w a r n i n g S M S
R e l a t i o n s h i p
b e t w e e n p u l s e
w e i g h t a n d
r a i n f a l l i n t e n s i t y
Typical correction curve of a rain gauge