p10919a: Voltage differences across the nine thermistors, with an offset of 0.005 V per channel.

The voltages are measured across the nine series-connected PT-100 thermistors. There are offsets from thermistor to thermistor of the order of 0.0001 V (one part in 4000). For a PT-100 thermistor (temperature coefficient about 2.5o C per W), this corresponds to a temperature offset of 0.07o. This can presumably be calibrated out. The random setting error seems to be about a third of this, and averaging may bring it down further.