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Automation Articles Page
Accurate Temperature and Resistance Measurement with new USB Device
by Anonymous













August, 2003 -- Designed for accurate resistance and temperature measurement, the Microlink 752 from Biodata also offers counting and output control. Included with the Microlink is the Windmill data acquisition software suite for Windows, making the measurement device extremely easy to install and use. Should anyone need any help, Biodata provide free technical support for life.

The 752 plugs into the computer’s USB port and can:
- handle up to 16 analogue voltage, resistance and RTD temperature measurements;
- switch up to 24 digital outputs;
- monitor up to 24 digital inputs;
- count events with up to 8 counters;
- control 2 analogue voltage or current outputs.
For larger applications up to 8 Microlinks can be connected to one PC.

For precise temperature measurement the Microlink reads RTDs, platinum resistance thermometers and Pt100 probes. When logging and displaying the data, the Windmill software automatically converts the readings to the user’s choice of engineering units, oC or oF for example.

When the resistance to be measured is small, the resistance in the leads to the sensors can significantly affect accuracy. However, different wiring configurations allow the lead resistance to be measured and compensated for. The Microlink 752 gives excellent results for all configurations, including 2 wire, 3 wire, 4 wire and, most accurately, 4 wire compensated.

The resolution of the measurements is set through software. You can choose from 12 to 18 bits: for fast speeds or high resolution. There are 4 input ranges available, or let the software automatically select the range most closely encompassing the signals.

The Windmill suite also includes data logging, charting, alarm indication, output control and DDE links to other applications like Excel.

USB devices like the Microlink 752 can be unplugged and plugged back in as required, with no need to switch off the computer or even restart Windows. Using USB hubs, the Microlink 752 can be up to 30 metres away from the computer.

For more information see
http://www.microlink.co.uk/752.html

or contact

Biodata Ltd
10 Stocks Street
Manchester
M8 8QG
UK
Tel: +44 (0)161-834 6688
Fax: +44 (0)161-833 2190
USB@microlink.co.uk



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