MercuryiTC
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the measured current is too high, the current trip circuit latches on and disables the linear
amplifier. The linear amplifier is also disabled if regular pulses are not received from the
microcontroller (referred to as the “dead man’s handle” feature).
10.2.2 Calibrating the heater circuit
The ADC performs an internal self-calibration routine when the user requests a calibration. This
calibrates each gain range (1, 8, 16, 32, 64, 128) on each input pair, at full-scale only. It is only
necessary to perform this calibration using a positive excitation voltage. The ADC is operated in
chop mode, which eliminates any offsets in the ADC.
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