Automatic Test Weight Lifter for "MXL" Style Weigh Belts

Calibration is fast, accurate and reliable.
The Thayer Scale test weight calibration method provides a repeatable and traceable method of verifying
feeder performance that has proven accurate. Unlike material sampling, it is always clean, fast and safe. Unlike electronic signals that simulate scale loading, it exercises the performance of critical electro-mechanical components. The Thayer Automated Test Weight Placement Assembly now makes calibration even easier and more exact:

• Automatic zero calibration
• Automatic span calibration with test load
• Automatic calculation and display of zero and span errors
• Automatic adjustment of zero and span errors

A simple, rugged mechanism holds the test weight above the scale platform during normal feed operation. Upon demand from Thayer control instrument, the mechanism lowers the test weight from the storage position onto to the scale platform via a linear screw type drive motor. For operator supervised calibration, the operator only touches the YES/NO pushbuttons on the control instrument which can be placed in a remote location. For automatic calibration, the Thayer instrumentation is linked to a host computer or programmable controller, thereby eliminating the need for operation.