BPC instruments uFlow, Operation And Maintenance Manual

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(2) Universal Data Logger with Ethernet interface
The hardware module includes eight analog current input channels for high-performance control
and monitoring applications. The system features analogue current input ranges of 4 to 20 mA.
To protect against signal transients, the module includes a channel-to-earth ground double
isolation barrier for safety and noise immunity.
When deciding between a USB and Ethernet interface, it’s important to weight the advantages
and disadvantages of both.
When it comes to the Data Logger unit with a USB interface, the most obvious benefit is cost. In
addition, the USB instrument is easier to install and most PCs have plenty of USB ports to
choose from. On the downside, the Data Logger with USB interface can only be accessed over a
relatively short distance. In addition, the USB connection is not really designed for reliable data
communication over a long period of time.
While slightly more expensive, the Universal Data Logger unit with Ethernet interface offers
more functionality by allowing the user to set each channel to measure not only gas flow, but
also temperature, pH and methane content. It also has a greater flexibility with regards to
distance (cable length up to 100 m) between Data Logger and computer, as well as a more stable
connection. (For more information about the Universal Data Logger, please read the Universal
Data Logger Operation and Maintenance Manual.)
In short, if the aim of the µFlow user is to view real-time data, in the immediate vicinity of the
device under test and store the data on the local hard driver, a Data Logger unit with USB
interface is the economical choice. If, on the other hand, the user is interested in a product with
more functionality, flexibility and reliability of data communication over a long period of time,
the Universal Data Logger unit with an Ethernet interface is the best choice.
The Data Logger software automatically logs the gas flow rate, shows a real-time visualisation of
the flow rate trend curve, as well as provides report generation. One Data Logger system can