I need help fpr my project.
I am using a current transducer from LEM (HXS 20-NP, datasheet attached) for measuring current.
I have 3 components, and my problem is that all the components did not show any output when I changed the current. So, what I am thinking is that the test circuit I made was wrong.
sorry I drew it the wrong way. The connection here is right (I attached the correct drawing).
when I measured the output voltage, it showed 7.34mV. I increased the current and the output voltage keep increasing...7.35mV, 7.36mV and never stops at one value.
sorry I drew it the wrong way. The connection here is right (I attached the correct drawing).
when I measured the output voltage, it showed 7.34mV. I increased the current and the output voltage keep increasing...7.35mV, 7.36mV and never stops at one value.
Is the Vref pin in the component an input or output?
What I understand , the Vref is an input, so I put 2.5V there.
I have doubt on my understanding. Maybe it is an output. What do you think?
The datasheet is clear in this respect. Vref is IN/OUT with 200 ohms internal impedance. You can either connect it to a load (> 200 k) or supply it from a low impedance external source, when needed. The permissible voltage range is 2.0 to 2.8 V then. Vout must be near to Vref without sensor current. 7 mV referred to ground is out of range. Can't say why, from a distance.