Fairbanks SCB-R9000-14U Ultegra Bench Scale - Manual (Page 14)

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APPENDIX I: USB OPERATION
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A. OVERVIEW:
The Ultegra™ Bench Scale is a low power, full speed device. A low power USB
device draws less than 100mA. A full speed device operates at 12Mbits/s. It uses
default Windows drivers and is installed automatically upon first connection with a PC.
The maximum USB cable length is 5 meters unless a self powered hub is used to
extend the cable length.
When a PC goes into standby mode the scale is forced into a low power mode to
comply with USB specifications. At this time the scale displays “SLEEP “, which
remains until the PC resumes normal operation.
The device is displayed at the following location in Windows: Control Panel -->
System --> Hardware --> Device Manager There are two items displayed for the
unit, HID-compliant device and USB Human Interface Device.
The scale sends data to the PC using a Point of Sale (POS) format. A typical USB
report includes scale status, units and weight.