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reading amps correctly

 
 
Reply Thu 7 May, 2020 10:23 am
I have an electrical question: I bought a "Eiechip LED Digital Voltmeter Ammeter DC Digital Multimeter 100V 10A Blue Red LED Amp Dual Digital display Volt Meter" I have it hooked up I know 13.5 volts and 1.8 amps are going into it I am running a small 6 v motor. the volt meter is giving me 13.9 V and 0.04 amps. the 13.9v looks fine to me but what does 0.04 amps mean? is that 400 mili amps or 40 mili amps? Just want to make sure I am reading the amps correctly.
 
engineer
 
  3  
Reply Thu 7 May, 2020 12:47 pm
@ewillustration,
How do you know the current is 1.8 amps unless you are measuring it? It likely means your motor is not under load. Just because the motor is rated to 1.8 amps, it only pulls that at max load.
ewillustration
 
  1  
Reply Fri 8 May, 2020 05:54 am
@engineer,
thanks, I am using a AC to DC adapter on the back it says 1.8 amps.

So what would 0.04 amps mean? is that 40 miliamps?

Thanks
engineer
 
  3  
Reply Fri 8 May, 2020 06:32 am
@ewillustration,
Yes, 40 mA. That number on the adapter is the max rating for the adapter. Voltage should be pretty constant, current changes depending on how much power you are drawing. The more power, the higher the current. I would trust your amp meter.
ewillustration
 
  1  
Reply Mon 11 May, 2020 07:08 am
@engineer,
Thanks
0 Replies
 
 

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