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 This page shows you how you can connect a load cell to a PC/Laptop/Tablet* and how you can use the data...

 

Load Cell Tablet

 A simple USB load cell system, using a Low Cost 10" tablet* as a large display.

Hardware

You can add a USB connection to any of our load cells by selecting the USB module from the "Output" list box on the load cell product page. The miniature In-Line USB module (58mm x 33mm x 13mm) then becomes an integral part of the load cell cable (there's also a separate USB Load Cell Adapter for retrofitting to existing load cells). The cable is then plugged directly into a spare USB** port on your device, giving you a simple working system. You can connect as many USB load cells to your device as you have spare USB** ports. If you need to connect more load cells than you have ports, you can add more ports by using a USB Hub.

 

Load Cell In Line USB

Miniature In Line USB module

 

 

USB Hub 450

 

USB Hub for Multiple Load Cells

Software

Once you've connected your load cell and PC/Laptop/Tablet*, the free software will display live readings that can also be logged to a CSV file (max 24 load cells). The logged data can then be loaded into a spreadsheet, like Excel, to produce graphical reports etc. If you want to try the free software now, you can download and install the single-channel version, as it has a "Demo" mode. The demo mode lets you see all the available settings without having to have a load cell connected. Also, if your device is connected to your network you can access any logged data from other PC's on the network.

More advanced users/programmers can take advantage of the DLL driver and create their own windows applications (Driver file comes with example source code for Visual Net and C programs). The modules can also be set up to produce a constant stream of ASCII values which is handy for interfacing with other terminal type programs/equipment.

 

PC-USB module

Setup and Single Channel Logging

usb software

(Click here to download software)

(it's free!)

 

PC-USB module
 
Multichannel Logging Software
 

usb adapter 24ch logging

(Click here to download software)

(this is free too!)

 

 

 

Example CSV file in Excel 

Example CSV file in Excel showing logged Data (Time stamp, milliseconds and load cell output)

 

PC USB Module Specification

ParameterMinTypicalMaxUnits/Notes
Average Operational Current (normal mode)   70 80 mA@350 Ohm
Operating Temperature Range -40   85 Deg C
Storage Temperature Range -40   85 Deg C
Humidity 0   95 %RH
Bridge Measurement
MeasurementMinTypicalMaxUnits
Offset Temperature Stability   1 4 ppm/C
Gain Temperature Stability   3 5 ppm/C
Offset Stability with Time   35 160 ppm of FR
Gain Stability with Time     300 ppm of FR
Non Linearity before Linearization   5 25 ppm of FR
Internal Resolution   16 Million   Counts/Divs
Resolution @ 1Hz Readings (Noise Stable) over 100s   200,000   Counts/Divs
Resolution @ 10Hz Readings (Noise Stable) over 100s   120,000   Counts/Divs
Resolution @ 100Hz Readings (Noise Stable) over 100s   50,000   Counts/Divs
Resolution @ 500Hz Readings (Noise Stable) over 100s   18,000   Counts/Divs
Signal Filter Dynamic recursive type user programmable

 

Module Dimensions: 58mm x 33mm x 13mm
Cable length from USB connector to module: 300mm
Total cable length: as selected in "Termination" option on load cell product page.

 

* Windows OS only.

** USB Type A connector (other USB types available on request).

 

 

Contact Us

Richmond Industries Limited

Unit B9, Acre Business Park

Acre Road

Reading

RG2 0SA UK

 

Phone: +44 1189 310 396

Email: sales@loadcellshop.co.uk

Company No. 2813623

 

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