10-23-2019 02:11 PM
Hello Mentors,
I am doing an experiment in which i have to use a DC Supply of 5V with current range 1-20mA as an input to a PT100(Temperature Sensor). I have to measure the voltage across the PT100 too.
I have NIcRIO 9024 and the two above devices NI9021 and NI9263. I want to know can i use these cards for creating a power supply 5V,(1-20mA) and control the current within Labview and measure the voltage across PT-100 in Labview.
Can someone advise me which one is suitable for my experiment NI 9201 or 9263 and why?
Solved! Go to Solution.
10-23-2019 02:33 PM
The 9201 is fine for measuring your voltage. But the 9263 can only output 1mA. You might want to look into just getting a simple 5V power supply to power your sensor.
10-23-2019 02:38 PM - edited 10-23-2019 02:50 PM
I have 9401. Can i use this for Power Supply and control it in labview? If not, Can you recommend any other NI Module for DC/AC Power supply?
10-23-2019 03:05 PM
10-23-2019 03:22 PM
I have to choose first from available modules. I have 9201 for voltage measurement(even in mV) as suggested above. Now i need to decide about 5VDC Supply and (1-20mA) current supply to my PT100 ??
I think power supply will be better alone.
10-23-2019
09:26 PM
- last edited on
11-18-2024
11:15 AM
by
Content Cleaner
I also would really like a power supply C-Series module, but the specifications essentially prohibit this - this "Module Development Kit" overview lists some of the specifications that all C-Series modules must satisfy, which include maximum power dissipation and current demands.
10-24-2019 12:47 AM - edited 10-24-2019 12:47 AM
Hi Zohaib,
@ZohaibRamzane wrote:
Now i need to decide about 5VDC Supply and (1-20mA) current supply to my PT100 ??
When you use a 5 V power supply you should use a resistor to limit the current through the Pt100 resistor: ~4.7kOhm will limit to ~1mA. Now you can measure the voltage across your Pt100 and, by applying basic voltage divider rules, calculate its resistance and from that the temperature. Keep in mind the resolution/accuracy of your voltage measurement to know the error (in Kelvin) you will get for this kind of measurement/calculation.
Other option: use some additional hardware to supply a know current to your Pt100 resistor: there are current surces like a LM334…
Next option: use an additional signal converter (like this) to convert the Pt100 resistance into an "industrial standard" signal of 0…10V…