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3. Connect a 100 kΩ resistor (25 ppm accuracy) to the input and measure
its resistance. Note the average error in the measurement. Adjust the
100K_ADJ parameter by subtracting the measured error. For example, if
the input is exactly 100.0000 kΩ and the readout shows 99.9913 kΩ,
100K_ADJ should be adjusted by adding 8.7 to it.
4.
Record the date with the calibration date parameter.
5. Verify the accuracy at 0Ω, 4kΩ, 10kΩ, 40kΩ, 100kΩ, and 1MΩ. Verify
at least one resistance on each channel. The accuracy must be within the
short-term accuracy given in the specifications.
6.
Set the wiring configuration of both rows to three-wire (see Section
11.3.1). Verify the accuracy with at least one resistance on each channel.
The accuracy must be within the short-term accuracy given in the
specifications.
11 2564 Thermistor Scanner Module
Calibration
145
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