Today I am looking at data from a resistor string intended to measure thermal gradients in the Bay and Delta. It consists of nine PT-100 thermistors, connected in series with a current source. The thermistors are mounted in a 1-1/4" PVC pipe, spaced a foot apart. Joe Adolfo built much of the electronics and helped with the LabView data acquisistion program.
There are two data files now. Both represent measurements with the thermistor string hanging near the ceiling in the lab (TH 208):

• /d4/Darmat/data/thermist/0109/18/thm10918.000: 60 samples, representing about 5 minutes of measurement time.
• /d4/Darmat/data/thermist/0109/18/thm10918.001: 3600 samples, representing about 5 hours of measurement time.

raw channel voltages source

voltages across the thermistors source

raw channel voltages source

voltages across the thermistors source