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Deploying a logger in a culvert pipe
Here’s a link to a YouTube video showing the installation of our conductivity loggers in a culvert pipe:
http://www.youtube.com/watch?v=bpNwM6jQQWo&feature=plcp
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T-VER-E50B2 operation
The T-VER-E50B2 Energy and Power Meter outputs three sets of pulses that are logged by the UX120-017. These pulses represent Watt-hours, Amp-hours, and VAR-hours. HOBOware software uses these pulse values to calculate AC Current, AC Voltage, kW, Power Factor, VARs, and VA.
/files/14993-A-Derived-Channels.zip
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Installing Onset soil moisture sensors
Use the attached guide as a reference when deploying soil moisture Smart Sensors.
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HOBOware heap error and aborting error work-around
HOBOware Java VM aborting message HOBOware 3.4+ (HOBOware 3.4.0 or higher only)
HOBOware fix for “heap error, and aborting error.” This new command-line fix can make HOBOware work by modifying the shortcut for starting HOBOware.
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RX3000 & U30 Networking, Firewall Problems
Network firewall difficulty:
The network interface controller (NIC) in the HOBO RX3000 and U30-ETH and WIF will attempt to make a connection to the numerical IP address 208.85.146.151:54328 every "Readout Interval." Your firewall must allow the logger to connect to this IP address, and must also allow the MAC address of the logger NIC.
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U12 input impedance
This note looks at input impedance characteristics of the HOBO U12 loggers with external inputs. "Rs" and "VA" in the attached diagram represent your source impedance.
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Verifying RH accuracy on HOBO data loggers
Testing the accuracy of relative humidity sensors requires carefully-controlled conditions and a considerable amount of time. Please see the white paper Testing the Accuracy of Sensirion Relative Humidity Sensors in HOBO Data Loggers for complete details on the recommended procedure to follow.
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Connecting a 4-20mA to an external input
The 4-20mA cable (CABLE-4-20mA) measures currents from 0 to 20.1mA. The cable must be connected such that the current flows through, and with the proper polarity, as shown in the diagram. (Do not expose to current above 20mA or negative current.) Do not cut off the end of the gray cable where it connects to the blue and yellow wires, as this contains the precision resistor required for current measurements.
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