Hydro Logger H40
User manual
FIEDLER
electronics for ecology
29
4.4.
Control channels
The Hydro Logger H40 contains 7 control channels K9 to K15 that monitor the operat-
ing parameters of the instrument such as the capacity of the power battery, the temper-
ature and humidity inside the instrument or the current draw of connected sensors and
probes.
The user has the option to enable/disable the selected control channel and set a com-
mon archiving interval. Usually this interval is set to a value higher than 60 min (most
often 1440 min - 1x per day), so that the volume of transmitted and archived data does
not increase excessively.
Channel
Measured quantity
K9. Ubat-low [V]
Voltage loaded on the lithium battery supply ( I= 100 mA). Measure-
ments are taken at 24 h intervals or at the end of each data session to
the server.
K10. Ubat-high [V]
Unloaded lithium battery supply voltage (I = 5 mA). Measurements are
taken at 24 h intervals or after each data session to the server.
K11. BatPct [%]
Capacity of the power supply battery calculated by successive integra-
tion of the current drawn from the battery
K12. Ipwr [mA]
The amount of current drawn from the Unap power terminal. Analog
sensors with 4 - 20 mA output or probes communicating via RS485 se-
rial interface are connected to this terminal. The power supply to exter-
nal sensors and probes is only momentary for the duration of the meas-
urement of the monitored quantities.
K13. Inter.temp [
°C
]
Temperature inside the device
K14. Unap [V]
Unap terminal voltage size The size of this supply voltage is user ad-
justable from 6 to 15 V DC.
K15. Int.humidity [%]
Relative humidity inside the instrument An increase above 80% indi-
cates a leak in the instrument and can lead to damage to the electronic
circuitry in the long term. An RH sensor is not standard with the instru-
ment.
The most important for the user is the K11 control channel, which shows the remaining
capacity of the power battery. The other control channels are mainly important for ser-
vicing and self-diagnosis of the correct function and optimum setting of the instrument.
L i s t o f c o n t r o l C -
c h a n n e l s
Fixed preset control
channels. Any control
channel can be swit-
ched off or
enable for measure-
ment and archiving.
To select a channel,
click the left mouse
button above the
channel.
Check this option to
enable measurement
and archiving of the
selected control C-
channel.
The archiving interval
is common for all con-
trol C-channels. Do
not set the value of
this parameter to a
shorter interval than
60 min to avoid unne-
cessarily increasing
the amount of data
transmitted and ar-
chived.
