HOBO U30 Station (NRC) User’s Guide
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Sensors.
9. Battery
A 4-volt sealed lead-acid (SLA) battery is
located behind the internal enclosure.
10. Battery connector
Plug in the 4-volt sealed lead-acid battery
here.
11. Ground connector
Plug in grounding wire here to ground the
system. Systems that are installed on roofs or
other exposed locations should be grounded.
12. External power supply
Plug in the compatible solar panel or AC
adapter here. Important: Always connect or
disconnect external power before the battery.
Damage may occur if the battery is
unplugged before the external power is
disconnected.
13. Internal enclosure
This provides a second weatherproof housing
for the electronics in the HOBO U30 Station.
There is no need to ever open this, and
opening it will void the warranty.
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HOBO U30 Station (NRC) User’s Guide
Smart Sensors
Smart Sensor Cable Length
The HOBO U30 Station can work with a maximum total of Smart Sensor
cable lengths up to 100 meters (328 feet), as measured from the logger
connection point to the electronics embedded in the individual cables.
Optional Smart Sensor extension cable lengths must also be included in the
total. This limitation applies to Smart Sensor cables only. The lengths of
other cables, such as those connected to the Analog Sensor Port or the analog
portion of smart sensor cables do not need to be included in this total.
Data Channel Limitations
The HOBO U30 Station can log up to 15 data channels (not including the
internal battery channel). This includes the two channels in the Analog
Sensor Port plus each of the Smart Sensor channels (note that some Smart
Sensors may have more than one channel). If you have more than 15
channels connected, some of the sensors will be ignored. You should remove
any Smart Sensors that will not be used in the deployment, and disable the
second channel in the Analog Sensor Port if it is not needed (the first channel
cannot be disabled).
If you connect a Smart Sensor that has multiple channels (such as
temperature and relative humidity), all of its channels will be logged. There
is no way to disable them.