• State Verified Answer
  • Locked Locked
  • Replies 8 replies
  • Subscribers 64 subscribers
  • Views 1370 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 283012
Options
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Power Profile Kit II measures 1.5microAmps when disconnected

vofitserov

I'd like to use Power Profiler to measure really low currents (watches) ~0.4 microAmps. 

However, Power Profiler II measures 1.5microAmps even when disconnected with or without voltage supply.

I've tried using Advanced Settings to reduce gain for R1 but even with lowest setting (0.9) the kit measures 1.3 microAmps when disconnected.

Is there way to calibrate/reset the device to make sure it has true zero?  

 

Parents
  • 0

    Hello Vladimir,

    Thanks for your query. Sorry for the late reply as your query arrived in weekend. 

    Can you please share your measurement set up (photo or drawing)? You are talking about 800 mV supply; is this from the PPK or separate supply?

    To get a true zero, we have to consider other factors like environmental noise, noise from the USB as well as the consideration of kit. It has to be make sure that the working environment is ESD safe, USB power supply is isolated from main and proper working of shielded USB cables. It should not be source the DUT rather using a proper power supply which can offer better accuracy and noise suppression. I think Andrew pointed out right thing.

    Another issues have also impact on this value - the way you measure the resistor; the type of multimeter is used. Measurements can be varied based on these parameters. 

    Thanks.

    Best Regards,

    Kazi Afroza Sultana

Reply
  • 0

    Hello Vladimir,

    Thanks for your query. Sorry for the late reply as your query arrived in weekend. 

    Can you please share your measurement set up (photo or drawing)? You are talking about 800 mV supply; is this from the PPK or separate supply?

    To get a true zero, we have to consider other factors like environmental noise, noise from the USB as well as the consideration of kit. It has to be make sure that the working environment is ESD safe, USB power supply is isolated from main and proper working of shielded USB cables. It should not be source the DUT rather using a proper power supply which can offer better accuracy and noise suppression. I think Andrew pointed out right thing.

    Another issues have also impact on this value - the way you measure the resistor; the type of multimeter is used. Measurements can be varied based on these parameters. 

    Thanks.

    Best Regards,

    Kazi Afroza Sultana

Children
No Data
Related