Fluke 393 FC Solar Clamp Meter Review I’ve been working on solar installations for years, and trying to get a clamp meter into a crowded combiner box has always been a pain. That’s why I was excited to test the Fluke 393 FC Solar Clamp Meter, CAT III 1500 V, IP54-Rated — it’s built specifically … Read more
Fluke 1587/I400 FC Insulation Multimeter Review I was troubleshooting a motor winding issue and needed more than just a basic multimeter. That’s when I grabbed the Fluke 4692725 1587/I400 FC 2-in-1 Insulation Multimeter with Clamp to check both insulation resistance and AC current in one go. This tool is really for electricians and maintenance pros … Read more
Fluke 289 Industrial Logging Multimeter Review I’ve been burned by ghost voltages more times than I can count, so when I got my hands on the Fluke 289 True-RMS Stand Alone Logging Multimeter, the LoZ function that eliminates those phantom readings was the first thing I tested. This thing packs a 50,000 count display and … Read more
Fluke 77-4 Automotive Multimeter Review I’ve been burned by cheap multimeters that give flaky readings, especially when I’m troubleshooting a car’s electrical gremlins. That’s why I grabbed the Fluke 77-4 Automotive Digital Multimeter 4.8 to see if it lives up to the hype, especially with its large display and auto/manual ranging features. Honestly, this meter … Read more
Fluke 177 True-RMS Multimeter Review I was tired of my old meter giving wonky readings on variable frequency drives, so I picked up the Fluke 177 True-RMS Digital Multimeter. With 6000 counts and a 33-segment analog bar graph updating 40 times per second, it catches those quick voltage spikes I used to miss. This meter … Read more
Changing the scrolling speed on your FNIRSI multimeter graph lets you control how fast the waveform moves across the screen. This matters because a speed that is too fast can make it hard to spot small voltage changes. If you set the scrolling speed too slow, the graph can feel sluggish and miss quick signal … Read more
Yes, you can replace the battery in your FNIRSI multimeter yourself. This saves you time and money, keeping your device working for all your electrical projects. Most FNIRSI models use a standard 9-volt battery that pops right out. You just need a small screwdriver to open the back cover, making it a simple five-minute job … Read more
You might notice your FNIRSI multimeter shows readings that are 2-3% off from what you expect. This small variance is normal and it helps you trust your tool for everyday electronics work. That 2-3% difference often comes from the meter’s basic accuracy rating, which is a standard specification for affordable digital multimeters. Environmental factors like … Read more
When you see the Vavg value on your FNIRSI multimeter, it shows the average voltage over time. This number can be confusing because it does not match the simple readings you expect from your meter. The Vavg reading is only meaningful for pure DC signals or specific AC waveforms. For most common household circuits with … Read more
I have tried to connect my FNIRSI oscilloscope probe and the manual made no sense. This confusion is common and can stop you from getting accurate readings. The manual often skips basic details about probe compensation and grounding clips. These missing steps are why your waveform might look wrong even when the probe is plugged … Read more