Review on DROK Accuracy 0 33 00V 0 999 9MA 3 000A Voltmeter by Brad Lovro

The small meter is very accurate. Compared to my Agilent and Fluke multimeters, the voltage readings are within +/- 2mV. The voltage drop at the current clamps is approx. 80 mV with a load current of 400 mA. Yes, as mentioned in other posts, there is nothing in it that tells you how to connect. The photo on the Revain product page shows a wiring example. Here's what I understand: The thick red and black wires are the ammeter probes. The thin red and black wires are the power supply for the meter's circuitry itself. The thin yellow wire is the voltmeter probe. Both black wires are shorted internally. In other words, they are both connected to the same common ground. For this reason, the ammeter probes (thick wires) must be connected at the bottom (the thick black wire connects to the negative terminal of the power supply, the thick red wire to the negative terminal of the load and the positive terminal). of the power pack). the power supply is connected to the positive pole of the load). Otherwise the meter will not be powered unless you have a separate power supply. The voltage display always shows the voltage difference between the yellow thin wire and the black wire.