We have a setup of two thermistor arrays (one array with 3 thermistors and one with 7 thermistors). Each array has it's own DT9829 DAQ and is wired in as a four-wire thermistor setup. We are sampling at 20Hz and we're currently getting periodic noise (1Hz) on the 7 thermistor array, but not the 3 thermistor array. Each array uses it's own twisted shielded pair cable with enough conductors for a four wire setup. We have turned off all external electronics and possible sources of noise, but still get the 1Hz sinusoidal noise. Any thoughts on this or potential fixes?
DT9829 Thermistor Periodic Noise
in Measurement Computing (MCC)
Posted
Hello,
We have a setup of two thermistor arrays (one array with 3 thermistors and one with 7 thermistors). Each array has it's own DT9829 DAQ and is wired in as a four-wire thermistor setup. We are sampling at 20Hz and we're currently getting periodic noise (1Hz) on the 7 thermistor array, but not the 3 thermistor array. Each array uses it's own twisted shielded pair cable with enough conductors for a four wire setup. We have turned off all external electronics and possible sources of noise, but still get the 1Hz sinusoidal noise. Any thoughts on this or potential fixes?
Thanks!