Three point thermistor temperature set up

Details Three point thermistor temperature set up Three point thermistor temperature set up

1994-08-24

1996-03-05

Ramirez, Nestor R.

Photocopying

Contact printing

Light boxes

355285, G03G 1520, G03G 1320

Patent

active

054972183

ABSTRACT:
Thermistors are calibrated by taking three thermistor resistance measurements at various temperatures. The resistance values are converted or transferred to Analog to Digital (A/D) bits or bit values which the machine's microprocessor can relate to temperature. The three values are utilized for constructing a calibration curve in the microprocessor for a specific thermistor bead. Use of the curve allows for mathematical interpolation by the microprocessor between calibration points, providing a wider and more accurate range to set the fuser roll temperatures. This increased accuracy over a wider range than before allows the sensor to become a common part for a family of products which may require different standby and runtime temperatures.

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patent: 4585325 (1986-04-01), Euler
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patent: 4928147 (1990-05-01), Baumann et al.
patent: 5041718 (1991-08-01), d'Hondt et al.
patent: 5206694 (1993-04-01), Ohira et al.
patent: 5227270 (1993-07-01), Scheuer et al.

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