Current Sensing

[lolachampcar]

I am using a run of wire as my current sense element and have a few questions regarding the current sense input on the EMS.

(1)
Am I correct in assuming the two dedicated pins are the inputs to a precision differential amplifier?

(2)
Will these inputs tolerate values near the ground rail as opposed to the positive rail?

(3)
What is the differential voltage input limit?  I will go back and review the documentation on this one as you may already have it listed.

Thank You,
Bill

 

[dynonsupport]

Assuming you mean SkyView:

Yes, the input is a precision differential amplifier. The system is able to handle a common mode from -2V to 60V, so ground is fine.

The max differential voltage it can handle is +/- 120mV. It's bidirectional, there is no way to offset it to handle more differential range in one direction.

The sensor reports into SkyView in V, like other sensors. Thus the stock conversion factor for a 1mv/A shunt is 1000 (1mA * 1000 = 1A). You can tweak this in the sensor file as needed.

 

[lolachampcar]

Thanks for the spot on response. That is very helpful. The combination of +/- 120 mv and ground makes the input very flexible and useful!