DROK® 0.28'' LED 4 Digit Digital Voltmeter Ammeter Gauge DC 0-33V/0-999.9mA 0-3A 12V Voltage Current Measurement Meter Panel Volt Amp Tester Multimeter Red Digital Dual Display Monitor

I'm using the meter to measure a 4-20 mA loop. This meter works within my requirements. (I checked it via a Fluke 87. This meter was within 0.02mA.) For my go/no-go testing, this was a very good alternative to the very pricey Fluke. As other users have stated, the wiring diagram/connection diagram leaves something to be desired.

Handy and accurate

No instructions. Impossible to know if it’s connected properly.

Very Good

Tested up to 3A on a resistive load. The current measurement accuracy is quite good, being only +\- 0.005 A (5mA) different from my multimeters. The voltage measurement is less good, being anywhere from 0.05V (50mV) to 0.08 (80mV) higher than either of my two multimeters. The rated accuracy is 10mv, so that’s not great. A calibration or adjustment option would have been nice to set this, but no such option seems to exist. It has a push button, but it’s not clear what it does and pressing it doesn’t seem to do anything.

This meter combo was ideal to monitor the battery that powers my telescope during viewing sessions. When the voltage approaches 10.5 V I know I only have about 15 minutes before ‘shutdown’. The current meter let’s me know if all is well with the electronics, motor drives, dew heaters, etc.

Great product, works as expected.

These seem to work fine.

Afficheur utilisé sur un « banc d'essais ». Je suis peut-être chanceux, mais en ce qui me concerne, les deux afficheurs Volt ou Amp. sont très précis. Lectures comparées à mon Fluke 25 et à un multimètre 600,0, je me demandais lequel affiche la lecture la plus précise !