Ammeter voltmeter mydaq simultaneously
Hi, helps make a battery charge and discharge lab on mydaq running labview under Windows XP/7 2012. Have a vi
read simultaneous voltage current and voltage from the ports of mydaq. Currents are up to 0.7 A, so should use
the ammeter instead of a0.
The problem is, when I read with the ammeter, he agrees with multimeter fluke perfectly, but when I plug the voltmeter on the very ground I get different results on the ammeter (sometimes very different). I searched a bit and found no other examples of people using the voltmeter and ammeter at the same time.
I have attached the code and the various measures. This was the case of a battery of 6.5 V connected in series with
resistance of 45 ohms on the ammeter. The voltmeter was hooked on the battery so that simultaneous readings
could be taken.
1. is there a calibration Im missing? Or a parameter in vi?
2. is it feasible with a mydaq?
3. If not, is there a better solution as elvis protoboard?
jvpjohnny5,
From what I see, what you're trying to do can be done. You try to use the DMM one of the myDAQ for 2 different resources that is not allowed. To do this, I have reproduced the whole upward and tried to run the two resources at the same time and it is not allowed. The myDAQ is able to run one or the other, not both at the same time correctly. This is probably the reason that you could not find others with a similar question.
Tags: NI Products
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