New myPCLab USB Data Acquisition Unit for under £60.
Available from Audon Electronics is the myPCLab USB
data acquisition unit which accepts thermocouples, PT100
temperature probes, Volts and 4-2OmA loops all for under
myPCLab is a very compact Data Acquisition tool which connects
to a PC via a USB port and monitors two universal analogue inputs,
accepting thermocouples, Ptl 00, Voltages and 4-2OmA current
loops along with one digital input. Sampling rate can be up to 128
samples per second and ADC resolution is user adjustable from
11 to 15 bits. There is built-in thermocouple and P11 00 linearisation
and automatic thermocouple cold-junction compensation.
The myPCLab comes with an intuitive and easy-to-use Windows
data logger software package which plots data, shows gauges,
bargraphs and digital readouts and logs data to disk. Logged data
can be exported in multiple file formats (xis, pdf, rtf, xml, html,dbf,
txt, csv) for easy importation to analysis and Spreadsheet packages.
The myPCLab software can simultaneously communicate with multiple
modules, making it easy to expand the number of inputs of a
Although the myPClab is USB based, it actually uses a virtual RS232
Com port, so any software package that can talk to a Corn port can
communicate with the myPClab. There are two communications
modes, ASCII text and Modbus.
With ASCII text Auto-send, data is transmitted from the myPClab
in a simple comma separated ASCII text format at a pre-set time
interval. Data can be read using any package capable of accepting
ASCII strings including most daq packages such as LabVIEW, VEE,
DAoFactory, TestPoint etc, programming languages VB, Delphi,
C++ .NET, and terminal programs such as HyperTerminal.
In MODBUS RTU Slave mode, myPCLab acts as a Modbus RTU
slave that can answer to Read Holding Register requests, Modbus
command number 3. The module doesn t have a specific Modbus
address, since it s the only device in its serial port. It will answer to
read request to any valid slave address. It can therefore be used
with every SCADA software package that support MODBUS RTU.