BTMETER BT-605A AC/DC 600A Clamp-on Current Probe Amp Adapter for Work with Digital Multimeters

I evaluated this clamp meter at my lab for DC currents only. All measurements were taken at 10 amps or less. Comments: In the past twenty years, "safety shrouded" test leads have become the norm. This is understandable in AC or DC volts or in any circuit with high voltage potentials. In this particular application, the safety shrouded leads are not necessary, and make it difficult to connect to older multimeters. Why are they not needed? You are not opening the circuit to take a current measurement, and the clamp output is only 1mv/AMP . So in the worse case scenario if you were measuring 600 AMPS (the maximum current the device can handle) the output from the clamp will be 600mv only! Second comment: The manual enclosed was for the wrong model! It tells you to set meter to microamp function, this is wrong! Set dvm to DC millivolt range (which one depends on how much current you expect) comment 3: They tell you to press "REL" key on dvm, don't do this unless you are measuring small currents (< 2.5 A) My offset reading was -0.133 Amps (with zero current input) If you press "REL" you will add 0.133 AMPS (in my case) to all readings, it will ONLY help you for small currents. For larger currents, it will make the readings worse. Most please that buy a clamp meter, do so to measure large currents, that is probably for situation. So, do NOT press the "REL" key comment 4: Great value for the money, errors were less than 4.5% if you keep it between 3A and 10A No measurements were taken above 10A, I will leave that to someone else to do, my lab is very limited. (NO AC measurements were taken also) I don't see how I can do better than this, considering how little money I payed!!

Le istruzioni sono terribili, i terminali NON vanno inseriti nella presa mA, bensì tra COM e milliVolt. Meglio avere un multimetro con risoluzione 10 microvolt, tuttavia la clamp misura bene. E' una clamp ad effetto Hall. Per misurare ampere AC bisogna mettere la portata su millivolt AC, per gli Ampere DC su millivolt DC tenendo presente di usare la Clamp con la freccia stampata sopra VERSO il carico di corrente.

I tried so hard to get this product to work, to the extent that I considered keeping it just to take it apart and see why it didn't work but I wanted my money back more than I wanted to know why.

Mine never worked garbage

The clamp is very stiff. You need a strong hand. However, it works very well.