X-NUCLEO-IHM08M1 schematic question

[luke514]

I'm looking at a diagram of the X-NUCLEO-IHM08M1 and the manual states that you can select either 1 shunt or 3 shunts using jumpers J5 and J6.

By default, there is one shunt, but when tested with a multimeter, there is continuity between the two red points in the photo:

With the multimeter, I should be getting a reading of 10 mΩ on the tin, right? And between the tin and the other plate?

[Peter BENSCH · Accepted solution]

At a glance through the schematics of the X-NUCLEO-IHM08M1, you will find on J6 (similar for J5) the two signals Vshunt_2 and Vshunt_3, each of which leads to a shunt with 10mΩ. All of these shunts are connected to GND, so you should measure 20mΩ between the signals - which ordinary multimeters usually cannot distinguish.

Hope that helps?

Regards
/Peter

[Andrew Neil]

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@luke514 wrote:

I should be getting a reading of 10 MΩ on the tin, right? 

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Did you mean MΩ - or mΩ  ?

[luke514]

You're right, I made a mistake... it's mΩ

[luke514]

Thanks for clarifying that.

So, correct me if I’m wrong, but if I want three shunts I remove the current solder and reposition it in the opposite direction (from vertical to horizontal, as shown in the photo in the first post)

[Peter BENSCH]

Yes, but not only for J6, but also for J5.