Hi, My application is to have primary system and secondary system works in parallel to collect data. In any chase i do have data if either one system fails.
I need to connect, total of 20 thermistor's parallel on 2 units of T7pro. Please do advice on the schematic. Do i need to add any TJTick?
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There is a quick note about thermistors on our Temperature Sensors App Note:
https://labjack.com/support/app-notes/temperature-sensors
We recommend the LJTick-Resistance for handling thermistors:
https://labjack.com/support/datasheets/accessories/ljtick-resistance
The T7-Pro has 14 analog inputs, so to get 20 analog inputs you need to add a Mux80 or use 2 T7-Pros.
Once you have 1 system setup, you just run a wire from each analog input in system 1 to an analog input in system 2, such that both systems are measure the same voltages (which are the output voltages from the LJTRs).
Hi, I did order the following thermistors
EPCOS Thermistor 10k Ohm, 2.41 (Dia) X 6.5 mm
Referring to ljtick-resistance, is that ljtick-resistance 10k ohm will do for my application?
Thank you
As a first guess, for a 10k thermistor you would often choose the LJTick-Resistance-10k. For more guidance see "Choosing the 1k, 10k, 100k, or 1M Version" here:
https://labjack.com/support/datasheets/accessories/ljtick-resistance
Hi, thank you for information. i did purchase 2 unit of T7 with LJTRs. 1st unit of T7(A unit) i did connect the LJTRs with thermistor. The 2nd unit of T7 (B unit), i did loop wire from A unit at the point from labjack terminal to B unit at point of labjack terminal. Looping from just between AIN n to AIN n only.
A unit device interface with raspberry pi 3
B unit device interface with SCADA window base system. Seems doesn't work. Please do advice.
What does work and what does not work? Please provide some more details about what you are seeing.