Can the Amp gauge read negative? For instance if I put it inbetween a battery and solar charger if the charge current is greater than the load current
1550326
I cannot figure it out since is came with NO INSTRUCTIONS of any type. I wired it up to light up ok. Did get it to read voltage but can figure out the amps part.
1550327
I have 3 in service and I just tested one on the bench by reversing the source and load. They DO NOT read current in the reverse direction.There is info on the Amazon Site as how to hook up the amp meter. The yellow wire goes to the load negative
1550328
No, no polarity detector. You have to change the connection to measure charge or discharge currents.
1550329
In this case your battery wold be the loud and the solar charge controller wold be the source.
138242
If battery is at least 5 volts and gauge does not respond when connected then gauge is bad. My recollection is, there is nothing to adjust or set up on these. Just the two wires.Max 30V so don't connect to wall outlet! (duh, these are DC anyway).I'd test by finger-pressing the stripped ends of the leads directly on the tips of the 9V battery.A regular 12V car battery would also have contacts available for testing, in most cars.
259119
Hi Myke, My experience with several of these type meters is that with the meter upright, and looking at the back, there is typically a "-" sign molded in the plastic of the case near the right side connector. Of about ten of these of various amperages, I did have one where this side turned out to be the "positive" post. I suggest passing a small current through the meter to verify polarity. If deflection is in the wrong direction, just swap connections. These meters will tolerate some reverse current without trouble. I am very happy with mine and have more coming. Good luck!
789074
The meter supply with polarity connector, black and red wire, which represent minus and plus. The unit does not work at all if change polarity.i do not know what will happen if connect minus 5 v and plus 5 v. without ground. I assume it will not work or just show something wrong. Also, I take a look on surface mount parts and see that red wire via connector goes to diode. You may order this little thing just for few $ and blew up it under your desire in many different ways.
1673710
It shouldn't cause problems. The inverter would only see the voltage from the charger not the current.
1831206
Sure you can wire it to between battery and load. To monitor the amp hours your using.
557321
Max is 30 or 40, I just used a 25 for mine. The gauge is same thickness as a float battery charger that plugs in. Hope this helps.
652719
Not sure about that as mine is negative ground. That said, it should be ground polarity insensitive by reversing the connections.
1002587
There's no battery gauge. I believe the button light turns red to give you a warning that it's low on battery. The button stays green when fully charge. The color scheme is on the directions.
2239278
After checking it out online you can use this on a positive ground system just make sure positive to positive and negative to negative when charging
710300
I had the same problem, I went to the manufactures site I was only interested in voltage.They instructed hook together the two red wires for the positive and hook together the larger black with the yellow for the negative leaving the thin 20 gauge black loose. It will show the voltage only and illuminate both windows. Sorry can not help on amps.Richard
51076
Yes, I am busy using it to indicate the charge coming from a bank of solar panels. I am going up to a max of 42A (using the 200A shunt) - it does not seem to give a reading at low currents e.g. 1A but once it goes over this it is pretty accurate. I am using the battery that I am charging as the supply and it works fine.
893166
Does the digital reading show you a full charge? Is whatever you are plugging in drawing too many amps?
1207557
It will read DC Amps but accurately, I was reading a 3Amp load. I would suggest with all cheap meters to replace the probes and spend a little money $15/20 on a decent set of probes. Then it will read DC amps accurately once I replaced the probes.
1163623
The amperage will decline to a low value-perhaps 1 or 2 Amps. Probably the best way to know the state of charge of your batteries is the old-fashioned way. Check specific gravity. Should be 1.260 or higher.
151556
It'll measure up to 10 amps. Don't forget to plug the red volt meter wire into the current plug AND put it on the 10 amp range. If you get the wire polarity backwards, the volt meter will just show negative number. You won't blow anything up. However, do remember to move the red wire back to the voltage & resistance reading plug. Forget and you could have a problem the next time you try and read a voltage.Also be looking at the meter reading when you hook it up, if it goes over range disconnect immediately.
2163879
It will measure current well under 5A DC. I've been told clamp on meters aren't very accurate and I think this is compounded at lower currents when the coil is influenced by other stray fields. When I went outside and did a little testing with my trickle charger (and leadtype multimeter in series) I found that it's quite accurate (within 10%) down to 0.5A but when I got to the 0.05A it was out by up to 75%. I think your results will vary depending on environment.