250V-2500V Digital Insulation Resistance Tester 1MΩ-200GΩ Megger Megohm Testing Meter Auto Range 2000 Counts LCD Display 10V~600V AC/DC Voltmeter with 100 Data Storage

Working perfectly

Nice

Though the lower detection range of the meter is listed as 1.0 mega Ohm, any resistance value below 2.0 Mega Ohm is reading as zero resistance (as if it is short circuited). If the lower detection level was 0.1 Ohm, it would have been better. However, for high ranges, the meter is performing quite satisfactorily. Somebody has reported that there is some spelling mistake and blamed on the quality check. But, it is understood that the label is not written in 'English' and the language used is 'Romanian' and there is no mistake with the label. You can confirm this with 'Google Translator'.

We have old machines with wiring harnesses that run through sealtight. Sealtight gets damaged and can sometimes rip one of the cables inside. Can't tell were the break is without removing every wiring hardness out of seal tight. We'll that's were this comes in handy. The megger itself is really nice the cables on the other hand feel a little cheap. Don't really mind since I only need this to find shorts nothing else. To check voltage a use a trusted certified fluke clamp meter. I had some spare fluke cables in my toolbox so I installed them on the megger, they fit right in and I tossed the cheap cable sit came with. Now I got a hell of a unit. I like it so far, does what it says. I can find shorts just like the $1200 meggers some guys in the shop have You cant beat the $80 for the quality you get. So 5 start review for now. I will update my review if anything comes up.

It has performed as design. Would recommend you buy one

I don’t usually write a great review unless the product warrants it. I purchased this to test coax cable assembly’s for ham radio. I also use it to test motor windings. Here shown in the video is a 1 minute DAR test at 2500 volts. I am testing an RG213 coax jumper and verifying integrity. It gave a perfect 1.0 to the dielectric characteristics of the cable. It also shows at 2500 volts it was at 12 gig ohms. The meter serves it purpose well. As for the price it’s a bargain. I only have one problem that questions the quality control and that is the front labeling has the word Automatic spelled wrong. They spelled it Atuomatic. What’s wrong with these companies don’t they check the production? I have to remove one star for that because it does not look professional on a test instrument.

Airports run AC constant current series circuits with isolation transformers under every lighting fixture to step-down the voltage and permit the primary current to pass in the event of a single light fixture failure. This system is powered and managed by one or more large Constant Current Regulators (CCRs) which ensure that the current remains constant depending on a number of available settings between 4.7 - 6.8 amps. This is done by adjusting the voltage levels which nominally operate at 1,800 VAC, but can be raised in a matter of milliseconds all the way up to 5,000 VAC in the event of a circuit fault. The primary power cable which runs a complete loop from the CCR, around the entire 4,000' runway, and back to the CCR was unfortunately installed as direct bury. Regardless of how protected these cables are underground, the FAA requires that we perform regular, evenly spaced cable insulation resistance testing using a hand crank or digital megohmmeter and track the trends of the readings over time to anticipate failures prior to them occuring without warning. These "Meggers" weren't very cheap, the airport supply and tool companies offering those models capable of the minimum 2,000 VAC output needed starting at $3,500! That's too rich for a small rural town in Northern Maine to be sure. I'm grateful I found this one for the price it was offered at, but I was concerned that it wouldn't be ideal for our application and require us to become "creative" in order to use it for our purposes. Those concerns were absolutely unfounded, as this unit worked as if it were designed specifically for airport lighting use! We have a physical circuit interrupt and maintenance grounding block called the S1 Cutout which a couple of probe terminal ends I had from another tool fit perfectly into the built in circuit testing socket, and we're now in compliance! Don't hesitate to purchase this if you're in a similar situation at an airport, especially if your lightning vault is equipped with the newer ADB Safegate CCRs and S1 Cutouts. If your system isn't equipped with the ADB Safegate S1 Cutouts, I HIGHLY recommend you procure and install them between every CCR and it's circuit you operate. Nevermind the ease of maintenance those simple accessories offer, I feel that being able to remove the cover from an S1 Cutout and physically isolate the CCRs from the circuits, lock the cover out with a key to prevent anyone from reinstalling the cover allowing for the circuit to become energized, is cheap easy insurance that takes the concept of Lock-Out/ Tag-Out to a whole new level.

Cheap and Works fine