Kjzeex Clamp Meter, AC-DC Current Digital-100A 6000-Counts Low Impedance Voltage 1 mA Reading Auto Range Multimeter Tester with Temperature,True RMS (Red)

I urgently needed to check the battery drain current on my car, so bought this as the Amazon "best seller" would have cost half as much again. I checked as many of the normal functions as I could against a previous budget DVM, which agreed well. The slight niggles were that the decimal point on the readout display is at the bottom edge, which can be hard to see unless the screen is at a good angle. Also could only get the display back light to work with normal 1.5V batteries in it but not my 1.2V re-chargeables, but I have seen that issue in other devices. The instruction leaflet is in Chinese and pretty good English and is quite comprehensive, though is in a small font and does assume that you have a good idea of what you are doing. The clip on the side of the clamp head for a probe will help someone testing around a circuit board etc.Ran a test of the DC current clamp with a model train power supply, a small computer fan and my other DVM in series as an ammeter. Could just get the fan to turn over with a few volts and 10mA, then increasing to 120mA as around 12 volts. The clamp meter agreed with series ammeter and easily picked up the 10mA, after having "zeroed" a background of around 150mA due to local magnetic fields. Considering that it is sensing the magnetic field of a tiny current passing through one thin cable, it is a remarkable piece of kit.So off to the battery in the car boot, again taking care to "zero" the current reading close up to the battery cable and then hold the clamp in the same orientation around the cable. Locked the car and after a few minutes it calmed down to around 1.1 Amp which seemed rather high. Eventually realised I needed to flick the catch on the open boot lid to fully convince the car to shut down, after which the drain current dropped to 0.13 Amp (=130mA), which will not empty a 95 AmpHr start-stop battery in any hurry. Conclude that 1 year old battery had failed, rather than an issue with the car electrics.

As many other have, I used this for detecting a possible parasitic drain on a car battery without disconnecting all the ecu’s etc. Takes a bit of getting used to and don’t forget the SEL button needs 2 secs to zero the device (whilst near the cable) but only a quick press to change from DC to AC, so you might accidentally set it to AC and get an incorrect reading! Pretty accurate though when compared to inline ammeter and perfect for a quick test. Wouldn’t rely on it for really accurate measurements though. Measured 80mA when car was in sleep mode but up to 1.5A when ‘awake’. Appears to just need a new battery so worth every penny for this device.

Cheapest decent quality DC ammeter clampmeter I could find. Have only used basic functions such as checking DC voltage and current on some electric outboards but so far so good.

Readings are all over the place, clapmeter doesn’t work.

Purchased mostly for the dc clamp current feature. For a sub £30 is a good device. Don't expect a super 1mA accurate device, there's inaccuracy especially below 100mA. Once zeroed, and before clamping any wire, the reading in the screen bounces up and down between 0mA and 20mA, so pics up interference easily.The quality is average, doesn't feel cheap though.Anyhow, I'm happy with the device.

My DC Crazy systems , Works great very convenient & Practical

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