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U30 Analog Inputs

This information is included in the U30 manual. See attachment. Includes hardware.
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Charging a very low HOBO RX3000 or U30 battery

As mentioned in the HOBO RX3000 and U30 documentation, if the battery voltage is allowed to drop too low, it may not be charged within the logger.

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Judd Communications Snow Depth Sensor with the U30 Remote Monitoring Station

Check out the attached PDF to find out how to use the Judd Communications Snow-Depth Sensor with the HOBO® U30 Station.

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Wiring Diagram - HOBO U30 CVIA Voltage Input Logic Switch

Attached is a wiring diagram that shows how to monitor switch closures with a HOBO U30-

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U30 and excitation wiring with S-VIA-CM14 modules

Here is a wiring diagram for use with external sensors and the S-VIA-CM14s. Remember the excitation current required to power the external sensors cannot exceed 50 milliamps total. http://www.onsetcomp.com/files/U30%20VIA%20and%20S_VIA_CM14.JPG
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Adding or Removing Smart Sensors from a HOBO RX3000 Station

To add or remove smart sensors from a HOBO RX3000 station:

1. If the station is currently logging, press the Stop button to stop it.

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Remote Water Level Monitoring Application (U30)

The combination of the HOBO Remote Monitoring System/GSM and one or two third-party water level sensors with 4-20mA analog outputs provide a solution to remotely monitor water levels and access dat

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Calibrating ECH2O Soil Moisture Sensors Application Note

Onset adds smart sensor adapters to the ECH2O probes so that they are plug‐and‐play compatible with HOBO® U30 stations and HOBO Micro Stations.

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