Description

The ADU70 USB Load Cell (Strain Gauge) Interface enables wheatstone bridge measurements with 24-bit resolution at sample rates up to 150Hz. The internally isolated excitation voltage of 5.000V is suitable for most wheatstone bridge based strain gauges. This low-cost USB Load Cell (Strain Gauge) Interface is easy to use with VB, VB.NET, Visual C++, C , MATLAB, LABView etc. via standard HID drivers included with Windows. A mini-driver (DLL) is also provided allowing control using standard ASCII commands using familiar readfile, writefile commands. The ADU70 includes a 10' USB cable and is available in a flange mount enclosure with a DIN rail mount option.

Download the ADU 70 Quick Start Guide

Download the ADU 70 User Manual

ADU70 USB Load Cell 3D Icon Download ADU70 3D STEP files for FLANGE or DIN mounting types.

Key Features

USB load cell (Strain Gauge) interface with precision bridge excitation source.
Ratiometric configuration provides outstanding absolute( .01%) and relative (.003%) accuracy.
24 bit resolution
Internal isolated bridge excitation supply derived from USB bus.
Programmable gain from 1 to 128.
Programmable sample rate up to 150Hz.
Programmable buffer for high impedance sources.
Programmable CHOP function to minimize offset and offset drift.
2500V Isolation
Conformally coated sensing circuitry.
High retention USB Connector
CE Marked
Bi-colour LED status indicator.
High quality cage-clamp type terminal blocks.
Uses standard HID drivers included with Windows 98SE,2000,XP,7,8,10 32-bit or 64-bit
Mini-driver (DLL) provided. See Programming Page for details
Meets IEC61000-4-2 ESD protection for USB port.
Available in flange (standard) or DIN rail mount.

Technical Specification

ADU70 Features
Supply Voltage	NONE (Bus Powered)
USB Supply Current	70mA Typical 100mA Max
Operating Temperature	-25C Min to 85C Max
Isolation	2500V

Load Cell Input (Ratiometric Bridge Measurement)
Resolution	24 Bits
Total Absolute Unadjusted Error	+/- 0.02%FSR MAX @ 25C
Relative Error	+/- 0.003% FSR MAX @ 25C
Temperature Stability	+/- 3 ppm FSR/Degree C
Bridge Resistance	200 ohms or greater
Programmable Input Ranges	+/- 5V, 625mV, 312.5mV, 156.2mV, 78.125mV, 39.06mV

Bipolar Voltage Input (Absolute Voltage Measurement )
Resolution	24 Bits
Total Absolute Unadjusted Error	+/- 0.05% FSR MAX @ 25C
Temperature Stability	+/- 10 ppm FSR/Degree C
Input Current	Buffered - +/- 3nA Unbuffered - +/- 8uA (Varies with voltage GAIN=1)
Programmable Input Ranges	+/- 5V, 625mV, 312.5mV, 156.2mV, 78.125mV, 39.06mV

Special Functions
Internal Bridge Excitation	5.000 Volt Bridge Excitation
Excitation Current	30mA Max.
Mounting Options	Flange Mount (STANDARD), DIN Rail