How accurate is this device (measured against a regular volt meter?
854021
At room temperature and with the yellow or green LED on, it reads 0.01V high according to my (much more accurate than that) meter. In "red" mode (&lt;= 12.05V) it read spot on. I then chilled it by 25C. 16V went from 16.01 to 15.96. A tempco of 2mV/C. So if you've left it in the hot car and let it get to 50C, expect it to read 0.05V high, etc. If you're really stressing about 10 millivolts, remember that just the wiring in the car can easily cause that much difference between the battery and the socket.
1159216
There is no multimeter that isn't sensitive enough to determine this. However it is usually 24VAC, at least in the US but custom bundled transformer and bell sets may differ.
1026024
Same here. I think it is the auto-ranging function. Turn off the auto-ranging and it should settle down. I have zero variability when set to volts range. Given the price of the meter I decided not to worry about this glitch.
2122803
Pretty sure this is reference to meter accuracy. As in plus or minus 2.5%. I've used some twenty or so of these Uxcell meters of various amp and volt ranges and find them to be very good and accurate analog devices. (I also second the Wiki refs that William provided ahead of me).
1031245
No. The meter must be powered by a voltage between 4.5 - 30 VDC. It will happily measure the 52 VDC source, but you will need either a voltage regulator or a separate power source (like a battery pack) to power the meter. If you use a battery pack to power it, you will need to connect the (-) terminal of the battery to the (-) connection of the voltage source you are measuring so that they will have a common ground.
1676496
The one that I have is reliable and reasonably accurate down to about 80V. Below that voltage it rapidly becomes inaccurate and the display flickers. I do not know the maximum voltage. (I tested it with a variable-voltage transformer.)
826471
I have never checked it but my gut says it is fairly accurate. I have found that when the battery gets low it starts giving bad results.... It has an auto shut off but go ahead and turn if off your self to save the battery.
603197
Yes, that will work. The meter reading will indicate the value of the power source voltage. Instant battery voltmeter if that's what you want.
1581428
I couldn't say either way. I can suggest picking up a cheap digital caliper. They're easy to use and that will give you a good measurement. Also they tend to come in handy pretty often. Otherwise i would contact the manufacturer they would probably be able to tell you a definitive answer. Also i would confirm the voltage with them to be sure before you damage anything.
1936720
The meter must have its own, separate power supply. I use a 12vdc transformer plugged into my inverter and it works great. I am able to monitor amps used by the inverter and other DC loads connected to my batteries as well as switch to see battery voltage. If you already have a separate power supply, you may have a bad meter.
1900452
No. This is a fine meter which is more at home in the power distribution area than in the audio and RF signal strength area. Its lowest voltage scales are designed for 1 to 400V for both AC and DC. It's a good meter for its intended use which does not include micro and millivolt volt measurements. Input impedance circuits in meters like this are too low to measure millivolt size signals,
1581547
The meter is not symetrical, and one side must "face" the source of power, as outlined in the directions. Double check you have that right. From your description, I don't know how you have the panels wired. I would suggest you test only one panel at a time, and see if it produces 80% of it's rated power output when in direct sunlight and when the system is under a load. You could have a defective panel, a short, etc. (I'm assuming that you have already tested the meter using just the battery and a load and know it's okay)
1557672
Sure, but it will only measure the AC side of things. If you want to measure the entire RV, you'll need to attach it to the main feed wires going into the distribution panel where it will see power from any source (generator, shore, inverter). To measure power going to/from your battery bank, use meters designed for DC (with an appropriately sized shunt) and place them for either incoming (charger, solar panels, etc.) or outgoing (to the inverter or the DC breakout panel) power. For simple DC voltage measurement in my RV, I use one of these http://www.amazon.com/VoltMinder-Digital-Volt-Meter-Batteries/dp/B001IQ1XW4
239958
I have not had any problems with the meter, I am not sure what you are wanting to check the frequency of, but I use it on HVAC equipment and check frequency once in a while and it works for checking that.
875127
Take a digital Volt meter and it will tell you if it is positive of negative.Don
1633573
Yes, set the scale for DC range, and place the two probes using the correct polarity so the meter reading is a plus (+) reading. If the batteries are under load when doing this, the voltage may be less than 24vdc. If the two batteries are not connected to the trolling motor, the reading could be 24vdc, otherwise, if near zero or substantially less than 24vdc, the batteries are either bad, shorted, etc. or need recharged. Also check each battery separately.
996308
It's just a capacitor farad measurement tool. I don't think your results will be very accurate in-circuit.