klein plug tester lcd screen manufacturer

I wanted to like this Klein RT250 circuit tester with voltmeter. It has a rugged build, fits nicely and feels good in the hand, and has bright indicator lights and blue backlit LCD status panel. What"s not to like?Well, the first day I got it I tested it on a few outlets (circuits) around the house, and it seemed to be operating well. Two days later, I took it out again to test a few more circuits and now, while the circuit configuration (Opens, Shorts, etc) appears to be working correctly, the voltage indicator is reading 150VAC where two of my multimeters are indicating 123-124VAC.I"ve tested the RT250 batteries with a multimeter while under device load and am receiving a nominal 3.2VDC reading, indicating that the batteries are fresh and not subject to undue loading by the RT250 electronics circuitry, so this rules out a low battery problem.But here"s where things get strange. When I plug the RT250 into a rheostat, I receive correct voltage (as verified by my multimeters) and correct circuit indication that I have an open ground (since the rheostat is isolated from ground). I also plugged the RT250 into an isolation transformer I recently purchased here on Amazon and modified so that ground is in fact, isolated, and again, I receive a proper reading on the RT250 showing proper circuit configuration (open ground) and proper voltage for a north-American residential supply.PUZZLING CONCLUSIONODDLY ENOUGH, I just ran around the house testing my receptacles one more time while trying to get a better understanding of the various readings I"ve been getting, and LO AND BEHOLD, the RT250 seems to be working perfectly once again. This is puzzling. I"ve done nothing different from when I was receiving the initial readings, except maybe removed the batteries for a period of time and reinstalled the same batteries (I am certain they are the same since they are the branded batteries that came included with the RT250, so there is no chance I replaced them with a set of my Duracell batteries that I have strewn about the area).So now I don"t know what to think. Could it be the hocus-pocus that goes on with these IC-chip based meters is overly sensitive to noise in the AC circuits? It"s been raining hard in SoCal, so maybe the Linemen are out there doing strange things to the power gride while they perform repairs? Is some device (e.g. my furnace) at my home feeding back into my circuits in some strange way? (I tested with furnace off and on during my second round of testing, and that does not seem to make a difference, so I am reluctant to suspect my furnace, but I do live near a hospital and in an area with Amazon distribution centers and a few industrial plants, but those didn"t seem to affect the (good) readings from two of my multimeters).I"m still within the return period, so I"m going to hang onto it for a while longer while I continue testing and will do my best to update this review with my final findings and conclusion.

Klein Tools Receptacle Testers are designed to detect the most common wiring problems in standard and GFCI receptacles. A convenient chart on the tester helps determine wiring condition in outlet,...

Klein Tools Multimeter Test Kit contains Cat. No. MM300 (Manual-Ranging Digital Multimeter), Cat. No. NCVT1P (Non-Contact Voltage Tester) and Cat. No. RT105 (Receptacle Tester). The...

The new Klein Tools’ ET20 Borescope can be quickly connected to your smartphone via the built-in WiFi signal, turning the smartphone in your pocket into a smart tool. Install the compatible...

The Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet...

The RT250 from Klein is an electrical receptacle tester that tests the wiring conditions at an electrical outlet and inspects GFCI devices. The LCD displays the voltage, identifies the wiring fault, and the time required to trip a GFCI device. It is designated for use with North American 3-wire 120V electrical outlets.

The Klein GFCI Receptacle Tester detects common wiring problems, displays voltage, and inspects GFCIs. It’s small, handy, and with its LCD screen, convenient and simple to take a reading from quickly.

The RT250 was designed with unique features to make testing electrical outlets safer and easier. The RT250 features auto-hold, which keeps the reading on the screen so that users can remove the tester to view the display. This saves time and effort when working with receptacles in orientations with limited sightlines. An additional safety test includes the amount of time to trip a GFCI device, a feature not often found in GFCI testers at this price point.Sabrina Kalsi, product manager at Klein Tools

The Klein GFCI Receptacle Tester takes testing 120V outlets to the next level of simplicity. It starts with the LCD readout. We don’t often see these on ground fault or socket testers. It shows the time required to trip a GFCI device and it detects and identifies common wiring faults. The tool even includes Klein’s patent-pending detection of Open Neutral/Open Ground wiring faults.

The auto-hold feature on the Klein RT250 seems really helpful, particularly for those of us with questionable eyesight or with backs that don’t like to spend a lot of time bent over.

The Klein GFCI Receptacle Tester has a CAT II 135V safety rating for use on 3-wire, North American 120V electrical outlets. It also features drop protection that keeps it ticking even after taking a spill from up to 6.6 feet high.

The Klein GFCI Receptacle Tester is available from any number of retailers, both in-store and online. You can pick it up for $19.97, and it comes with a 2-year warranty. It looks like an easy-to-justify purchase and seems just as appropriate for homeowners as it does for Pros who want a quick testing tool in their bag.

Klein Tools is the result of one of those “happy accidents” that turn out to be revolutionary. Klein Tools famously got their start in 1857 when a linesman came to founder Matthias Klein to repair his broken pliers. Klein replaced the broken half and when the old half of the tool broke too, Klein forged a replacement for that, thus making the first Klein Linesman pliers. Since these humble beginnings, Klein Tools has grown and become one of the largest American made toolmakers and they’re a brand used by tradesmen, linesman and electricians all across America.