TestHelper TH-71B Handheld Signal Generator Source Simulator Meter,DC Voltage Current Thermocouple K/E/J/T/B/R/S/N,24V Loop,V / mA Step Output

I have a Fluke 787 that I use for bench work. I didn't want to spend a grand for a Fluke 707 for field work, so at a tenth of the price I gave this meter a try. The accuracy is absolutely fine for field 4-20mA calibration work. While it's obviously not built as tough as a Fluke, it works just fine for day-to-day use. Also, the fact that it's also a signal generator is a plus. I don't use a generator that often, but nice to know it has one. I'll post an update in six months or so.6 Month Update -I've been using it in the field (offshore Gulf of Mexico Oil & Gas industry) for the past 6 months and have nothing bad to say about it. The mechanicals...selector switch, case, lead plugs, etc. have held up just fine. I use it 99% of the time for verifying various types of 4-20mA transducer loops on PLC systems and it just works.Regarding accuracy. The Fluke 707 is rated at 0.015% and this little guy is rated at 0.2%. That correlates to 0.0025mA and 0.03mA corrections respectively. In the real world, that difference is absolutely irrelevant, so no issue there.The bang for the buck value of this meter is incredible and will work just fine for most automation/I&E techs needs, especially those who have to purchase their own tools and test equipment. Considering this meter is about $90 and the Fluke 707 is around $1,000, it's a no-brainer.Don't get me wrong, I'm not a Fluke hater, I probably have a dozen Fluke handhelds for various purposes, but this meter works fine. AND best part, if I drop it overboard while offshore, I've only lost $100 bucks and not $1,000...I did swap the leads out with a higher quality set including clips, but that is to be expected with a product package in this price range.No regrets whatsoever.

I was not expecting much when I bought this loop calibrator, as a fluke and Martel user on a daily basis, but boy was I out of place! This loop calibrator is AMAZING. I tested source and simulate modes for current loops to an Allen Bradley control logix AI card and to a fluke multimeter and it was DEAD ON! I also used this to calibrate inputs for 1-5v transmitters and it was perfect as well. I will update this review as time goes on and it sees some more day to day usage.

I bought this meter to source 4-20 and 0-10vdc circuits. It's easy to use and very accurate. Using my calibrated fluke 3000 for reference the output was nearly exact in tests. The auto run feature was nice comparing the output live up range. I work on industrial generators and PLC's and glad to add this budget meter to my collection. I've only had it a couple weeks I hope it lasts?. So far great piece for the small investment. If I needed it every day I would prob buy something else. But let's face it can't beat the cost!

Handy little unit that has some great features for the price point. The thermocouple reading takes a moment to settle but seems rather accurate.The backlight on this is fantastic. It's not just a couple of edge mounted LEDs that only light up the end digits. It fully backs up all the characters evenly.The continuity function is the fastest I've ever seen on a handheld, but I think it's because you're not waiting for the resistance reading. Either way it makes it easy to catch an instance of a switch momentarily closing.The only complaint I have is that it's a pretty light weight unit. Which means that having it sit up on the stand makes it is easy to tip when moving the leads around or pressing buttons. Then again light weight also makes it easy to use in the field and probably less damage if it falls. If you use this on bench all day you may want to make a stand for it.

Don't expect a fluke. That said I am surprised by how well this low priced tool works. I purchased this for a trainer at work. It worked so well I use it more than my fluke now. With the low cost I do not worry about it being broken or walking away. The only change I made was using a good set of fluke leads. The silicone fluke leads cost more than the meter. Don't be scared by the price, just don't expect a 700.00 meter.

So I bought this to test propane heater gas valves to determine if the valve will hold open from the millivolt power that is supposed to be supplied by the thermocouple. I test at 20 millivolts as most thermocouple should put out about 30 millivolts. If the valve proves then I can spend the money on a good thermocouple.

I do controls and use this to simulate 4-20. Very accurate, used my Fluke to verify. Great having 2 meters so you can simulate and read at the same time. This is cheap, works great and accurate. Highly recommend. Everyone in the office has these now.

This is a great low buget signal generator. I compared it to my Fluke and all the signals were spot on. If you have an occasional use for signal generation then this may be a good choice for you. I say this because the housing feels cheap and is not as robust as a fluke which is made for everyday use.

Garbage, do not waste your money, buy the protection plan if you do buy it. It worked great for 3 times I needed it. Then it quit working, I hoping I'll get my money back. I'll update the review if I do.Update, just lost my $100. Grrr

Fonctionne bien pour simuler et vérifier du 4 a 20 ma. Super satisfait!