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Current monitor/sensor

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audioguru

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Re: Current monitor/sensor
« Reply #14 on: November 04, 2012, 05:23:04 PM »
I do not know why you are doing things completely differently to the circuits in the datasheet of the IC.

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Re: Current monitor/sensor
« Reply #14 on: November 04, 2012, 05:23:04 PM »

denci

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Re: Current monitor/sensor
« Reply #15 on: November 05, 2012, 03:43:45 PM »
I made a battery analyzer, which can analyze the battery and discharge it. I can set up the discharge current with pwm controled voltage regulated through resistor. Voltage on resistor limitc the current, which flow from battery. I did the mistake and i put ZXCT at the end of circuit, because i was not careful what is show in datasheet. This analyzer would also be possibility of charge the baterry and all circuit swithing between charge and discharge through two relay and therefore i put the current monitor at the and of circuit but i made a mistake as shown.

How can I avoid this problem?

denci

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Re: Current monitor/sensor
« Reply #16 on: November 19, 2012, 11:12:34 AM »
Any idea??

denci

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Re: Current monitor/sensor
« Reply #17 on: January 21, 2013, 04:57:39 PM »
OK, I fixed the problem and i put the ZXCT1109 as shown in datasheet but i still have one problem.
If i want to get 0-5V output voltage and 0-10A sensing current i must put the Rsense of volue 10mE and Rgain 12,5kE, i get equations in datasheet.
But now i testnig the proper function of this measurments and i get 140mV in output with sense voltage 8,5mV and 410mV with sense voltage 16,4mV.
This is not what i want and not as calculated, it must be something wrong because i should get 0,5V in output with 1A (10mV sense voltage) current and so on, therefore 2A/V resolution??
???

denci

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Re: Current monitor/sensor
« Reply #18 on: January 23, 2013, 03:47:43 PM »
Any idea?

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Re: Current monitor/sensor
« Reply #18 on: January 23, 2013, 03:47:43 PM »