Hydro Logger H1
User manual
FIEDLER
electronics for ecology
47
The Hydro Logger H1 is equipped with circuitry to measure the current drawn
by connected sensors and transducers from the Unap terminals (terminals 6 and
10) on the connection board. A user-adjustable limit value of this current for
normal operation of the device allows to warn the operator, for example, by
means of an SMS message if this limit value is exceeded, which can indicate a
failure of the connected probe or damage to the cable and, at the same time,
prevent data loss caused by a malfunctioning probe or a low power battery.
Setting the appropriate SMS warning is covered in the chapter 6.9. on p. 68. In
addition to the warning SMS, the increase in current consumption above the set
limit is also stored in the station log and transferred to the database on the ser-
ver together with the data, where the corresponding warning target is activated
for the station name and the sending of a pre-prepared warning e-mail can also
be activated.
Similar to the previous parameter for permanently powered sensors connected
to the Uopto terminals (terminals 15 and 18 on the connection board). Because
of the permanent power draw from these terminals, connected OPTO sensors
should not draw more than 0.1 mA per sensor.
The recommended critical level for warning (sending a warning SMS, transfer-
ring information to the server) is twice the rated current of the connected sen-
sors.
The C3 control channel contains an indication called
Battery Capacity
, which is
expressed in %. This is calculated from the difference in voltage between the
loaded battery (channel C2, current 300 mA) and the unloaded battery (channel
C1, current < 10 mA) and is compared to the maximum allowable difference of
1.0 V (a parameter adjustable at the instrument factory). As the voltage diffe-
rence increases, the
Battery Capacity
reading decreases and drops to zero when
the difference between the two channels C1 and C2 is equal to or greater than
1 V.
The recommended critical level for warning (sending a warning SMS, transfer-
ring information to the server) is 15% of the battery capacity.
COMMUNICATION SPEEDS AND PROTOCOLS
Serial interface for connection of H1 station to PC with MOST program.
The RS232 connection uses the FINET transfer protocol of the MOST program.
The baud rate must be set to 19200 Bd.
Wa r n i n g l e v e l o f
c u r r e n t f r o m U n a p
T h e w a r n i n g l e v e l
o f t h e s t r e a m f r o m
U o p t o
B a t t e r y c a p a c i t y
w a r n i n g l e v e l
R S - 2 3 2
Summary of Contents for H1
Page 1: ...Small telemetry station for water applications H1 H2 Hydro Logger user manual version 1 10 ...
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Page 80: ...Hydro Logger H1 User manual 80 electronics for ecology FIEDLER Notes ...
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