Programming signal source and calibration data for a speedometer

Boots – shoes – and leggings

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324160, 324166, 36443112, 36457104, 36457107, 36457108, 364565, 341120, G01P 2102, G01P 2100, G06G 770

Patent

active

050180878

ABSTRACT:
A speedometer/tachometer assembly for an automotive vehicle, such as a heavy truck, has a ten section DIP switch for calibrating the speedometer and a like switch for calibrating the tachometer. When set to all "0's", each switch causes the corresponding meter to be driven by a variable frequency signal from a corresponding sensor, as calibrated by a corresponding calibration factor that has been preloaded in the non-volatile memory of a microprocessor that operates the meters. When set to all "1's", each switch causes the corresponding meter to be operated from pre-calibrated data appearing on a data link. When set to any other setting, the setting determines the calibration factor that is applied to the uncalibrated signal, and this is used to drive the corresponding meter.

REFERENCES:
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patent: 4074196 (1978-02-01), Webster
patent: 4140970 (1979-02-01), Graziano
patent: 4167699 (1979-09-01), Baker
patent: 4179740 (1979-12-01), Malin
patent: 4197585 (1980-04-01), Moorey et al.
patent: 4491007 (1985-01-01), Crowdes

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