Neptune APEX error in current readings

R

rckrzy1

Membership Expired
Well I spent a week working with Curt who now says it's just because I'm at the low end of the scale that my reading are off. I have a EB8 and a EB4 , the EB4 had low power devices like my leds for the nano and allways showed zero amps while the EB8 with my 10K main leds would show 1.0 to 1.8 amps.

So I took the EB8 off the power strip and plugged it into a port on the EB4 , and the EB4 showed .6 amps while the EB8 showed 1.2 , with all of the EB8 being drawed through the EB4 the EB4 should have ATLEAST been 1.2 amps. SO anyone else actually test the EB's ability to read current ? I can understand 10 or 20% off but to be off 200% means the reading are WAG's and not to be trusted.
 
I have 5 EB8's on my setup and seem to all be accurate within reason. I have never cared enough to ensure it is spot on though. But two of my EB8's have the exact load plugged into them and have the same code behind them (each EB8 controls two 200 watt units of LED's) and the graphs show them almost exactly following each other in amperage throughout the day, at the total amps I would expect.


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Mine tracks pretty good....the real question is why would you even put low current draw items on something meant for high current item's. [smilie=devil.gif] Take a multimeter or any other test equipment as an example...they have the different setting/ranges for a reason. Each setting is calibrated thru it's working range for accuracy, that is why you wouldn't try to measure 10mV on the 100V setting. [smilie=nerd.gif]

Cheers,
 
I tested last night with heavier loads, once you get to 5 amps they are close and the same up to 14 which is where I stopped testing since 15 is the max. SO just
don't use them on light loads and expect accurate readings. I just don't like how my eb4 shows ZERO , I know 30-50 watts aint much but it should default to show .1 atleast , to show something is turning on.
 
I guess you could alway's go by the on or off icon. [smilie=lol.gif] Does the data log or graph show anything?? You could alway's add another resistive load so that it registers if you are bothered that much or you can always sell me the EB4 and buy a EB8 for the frag tank. [smilie=clapping.gif]

Cheers,
 
Adam I am using two EB8's on my system, and the second one would not read correctly. I sent you a PM on information for a possible fix.
 
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