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.