Post by krisn on Oct 15, 2017 4:00:29 GMT -5
Hi,
I need to monitor a temperature of the outer surface of a copper dewar which is inside a thermos flask arrangement. The monitored temperature should be displayed continuously on a display outside.
I also need to design a PCB circuit which can give out 10uA of current to the DT-670 temp. sensor. I have chosen the TI LM series constant current source for this purpose (Link to the datasheet www.ti.com/lit/ds/symlink/lm134.pdf).
Also I need to get the voltage drop across the sensor to monitor the temperature and show it across the e-paper display. please suggest me if the IC chosen for the constant current source is fine.
What is the best IC/MCU which I can chose to monitor the temperature across the diode so as to display it on the e-paper display continuously.
How to calibrate the MCU for the temperature readings for those particular voltages. Is the dv/dt table given in DT-670 datasheet a source for me to do the calibration?
Also do I need to insert a sense resistor in series with the diode sensor as suggested in one of the literature (Appendix E- Temperature Measurement system).
I need to do all these things on a PCB and not using any external current source like model 121 DC current source.
Please suggest me a right track to go ahead.
I have attached the image of the set up where it is going to be used.
****Image deleted to avoid misuse*****
I need to monitor a temperature of the outer surface of a copper dewar which is inside a thermos flask arrangement. The monitored temperature should be displayed continuously on a display outside.
I also need to design a PCB circuit which can give out 10uA of current to the DT-670 temp. sensor. I have chosen the TI LM series constant current source for this purpose (Link to the datasheet www.ti.com/lit/ds/symlink/lm134.pdf).
Also I need to get the voltage drop across the sensor to monitor the temperature and show it across the e-paper display. please suggest me if the IC chosen for the constant current source is fine.
What is the best IC/MCU which I can chose to monitor the temperature across the diode so as to display it on the e-paper display continuously.
How to calibrate the MCU for the temperature readings for those particular voltages. Is the dv/dt table given in DT-670 datasheet a source for me to do the calibration?
Also do I need to insert a sense resistor in series with the diode sensor as suggested in one of the literature (Appendix E- Temperature Measurement system).
I need to do all these things on a PCB and not using any external current source like model 121 DC current source.
Please suggest me a right track to go ahead.
I have attached the image of the set up where it is going to be used.
****Image deleted to avoid misuse*****
