Wiring Diagram - Monitoring a Three-phase Circuit using the HOBO H22-001 Energy Logger and the T-VER-E50B2

Attached is a diagram that shows you how to use the T-VER-E50B2 Power and Energy Meter and the HOBO H22-001 Energy Logger to monitor in a 3-phase circuit. Logged para

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...

Light on/off data loggers recording more states than are actually occurring

If you are monitoring fluorescent lights, part of what you are seeing may be due to a fairly common attribute of fluorescent lights. When the filaments of a fluorescent lamp and the gas inside the...

How to Reset Your HOBO U-DT-1 or U-DT-2 Data Shuttle

If you have a problem communicating with your HOBO U-Shuttle or U30-Shuttle, try resetting it as depicted here.

Wiring Diagram - Monitoring a 3-phase Circuit using the HOBO H21-002 Micro Station and the T-VER-E50B2

Attached is a diagram that shows you how to use the T-VER-E50B2 Power and Energy Meter and the HOBO H21-002 Micro Station to monitor in a 3-phase circuit. Logged para

How to use the HOBO Pendant Coupler Start feature

Learn how to use the Coupler Start feature on the HOBO Pendant Data Loggers

Why is the RH response time less for the HOBO MX2301 vs the HOBO MX2302?

The RH response time in the HOBO MX2301 internal logger is faster than in the HOBO MX2302 external logger. This is due to the geometry of the location of the internal sensor in the loggers. In the...

Waterproof shuttle firmware update

Follow this link to a helpful video if you need to update your waterproof shuttle firmware. http://www.youtube.com/watch?v=8_O9-x7CPt8

`-888.88 Data Values

Problem: My Smart Sensor data shows a -888.888 for a good portion of the data file. -888.888 means that the logger cannot get a response from the Smart Sensor (after launch) Likely reasons:...

Using the pHionics STs pH Sensor with a HOBO RX3000 Station

This application note describes how to connect, calibrate, and operate the pHionics STs pH sensor with the HOBO RX3000 station. The pH sensor is compatible with any RX3000 configuration (cellular,...

Calibrating for pH at Temperatures Other than 25°C

The observed pH of the buffers (and samples) varies depending on temperature. As a result, it’s important to use pH calibration buffers that have known values at different temperatures (like the...

Wiring Diagram - How to Connect Multiple Sensors to One AC-SENS-1 Power Supply

Attached is a drawing that shows you how to power multiple external sensors with (1) AC-SENS-1 Power Supply. Please note that the AC-SENS-1 can supply 12VDC to a maximum load of 400mA. Helpful...