Weighscale Demo Window - Analog Devices AD7780 User Manual

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UG-078

WEIGHSCALE DEMO WINDOW

Click Weighscale Demo (in the main window) to access

the weighscale demo window (see Figure 4). The AD7780

evaluation board has a header, J3/J4, which allows you to

interface the ADC to a load cell. To connect a load cell to the

AD7780 evaluation board, LK1, LK2, LK3 and LK4 must be

removed. A 6-wire load cell can be connected to Header J3/J4.

With the load cell connected to the evaluation board, click the

RUN button (the button changes to a STOP button after being

clicked). The software then begins reading conversions from

the AD7780. The output data rate and gain are continuously

monitored so you can change either the gain or output data

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Figure 4. AD7780 Evaluation Software Weighscale Demo Window

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Evaluation Board User Guide

rate within the weighscale demo window. The output data rate

and gain being used by the AD7780 are reflected in the Output

Data Rate and Gain text boxes. The maximum weight being

applied to the loadcell must be entered in the Full-Scale Weight

(Kg) text box. The Zero-Scale Calibration button performs an

offset calibration, which is useful to remove the TARE of the

load cell. With the full-scale weight placed on the load cell, a

full-scale calibration is performed by clicking the Full-Scale

Calibration button.

To stop conversions, click the STOP button. To exit the

Weighscale Demo, click the BACK button.

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