Greetings all this is my first post, so be gentle.
I am a medical doctor, but moderately handy with a soldering iron and a computer.
I have needed to measure temperatures accurately down to -60 deg C in, and have been using GE thermistors and a multimeter, and a pen and paper with good results. However I now need to measure in 8 spots once per second for 200 seconds. I`m guessing I need a USB data logger.
I have found this:
http://www.h-tronic.eu/product_info....html&XTCsid=4c48b1e2719cb2ef3cb7d23d7c5fc436
Would this suffice, or are there any other suggestions?
The next question is how to rig the thermistors. I`m guessing that they should be in series with a reference resistor between GND and a 4V rail, with the junction of thermistor and R1 being the analog V input.
The other issue is the range of temps gives a range of thermistor resistances of 6K to 1M. How would the R be chosen. I`m guessing about 100K.
Any comments or am I over looking something very obvious???!!!
Thanks
I am a medical doctor, but moderately handy with a soldering iron and a computer.
I have needed to measure temperatures accurately down to -60 deg C in, and have been using GE thermistors and a multimeter, and a pen and paper with good results. However I now need to measure in 8 spots once per second for 200 seconds. I`m guessing I need a USB data logger.
I have found this:
http://www.h-tronic.eu/product_info....html&XTCsid=4c48b1e2719cb2ef3cb7d23d7c5fc436
Would this suffice, or are there any other suggestions?
The next question is how to rig the thermistors. I`m guessing that they should be in series with a reference resistor between GND and a 4V rail, with the junction of thermistor and R1 being the analog V input.
The other issue is the range of temps gives a range of thermistor resistances of 6K to 1M. How would the R be chosen. I`m guessing about 100K.
Any comments or am I over looking something very obvious???!!!
Thanks
