FNIRSI

FNIRSI DMT-99 vs FNIRSI DMC-100: Best Digital Multimeter for Home Use I’ve been testing two of FNIRSI’s most popular meters for home use: the DMT-99 Digital Multimeter and the DMC-100 Clamp Meter. Both pack 9999-count TRMS accuracy, but they’re built for different jobs around the house. If you’re a DIYer or hobbyist wondering whether you … Read more

FNIRSI 1013D Plus vs FNIRSI 1014D Oscilloscope: Best Professional Tablet Scope? I’ve been testing two very similar oscilloscopes from FNIRSI — the 1013D Plus and the 1014D — and I’m here to help you decide which one fits your professional bench. Both pack 100MHz bandwidth and 1GSa/s real-time sampling, but they’re built for slightly different … Read more

Your FNIRSI multimeter has a battery saver mode that helps your device last much longer between charges. This feature stops unnecessary battery drain when you forget to turn it off. I have found that leaving battery saver off can cut your multimeter’s battery life in half. The backlight and continuous measurement draw power even when … Read more

You might be wondering why your FNIRSI multimeter has a tiny MCX connector instead of standard probe jacks. This small port is key to the meter’s high-frequency measurement abilities. That tiny MCX connector is designed for clean signal transmission up to gigahertz frequencies. Standard banana jacks would create interference and signal loss that ruin RF … Read more

I bought an FNIRSI multimeter expecting it to measure temperature, but was surprised to find no thermocouple in the box. This missing accessory matters because temperature readings are crucial for electronics troubleshooting and HVAC work. The company likely cuts costs by omitting the thermocouple, knowing many users already own one. They also assume most buyers … Read more

If you own an FNIRSI multimeter, you might notice the BNC connectors are packed very tightly together. This close spacing can make it tricky to plug in standard probes or adapters without them touching each other. This tight layout is a trade-off to keep the multimeter body small and portable. By squeezing the inputs together, … Read more

I opened my new FNIRSI multimeter and found a sealed battery compartment with no way to swap the cells myself. That frustrated me, because I expected a simple battery door like every other meter I have owned. The truth is modern sealed batteries allow for a thinner, waterproof case that protects sensitive electronics from dust … Read more

The FNIRSI multimeter you own likely cannot measure 28V from PD3.1 chargers because its hardware is designed for older USB Power Delivery standards. This is a common frustration for people trying to test new fast-charging laptops or power banks. PD3.1 introduced a new 28V fixed voltage, which requires specialized circuitry to negotiate and measure safely. … Read more

I picked up my new FNIRSI multimeter excited to test it, but the menus were all in Chinese. Figuring out how to switch them to English took me a full hour of frustration. The process was hidden deep in the settings, and the icons were not intuitive at all. I finally found the language option … Read more

You bought an FNIRSI multimeter that claims 9999 counts for True RMS readings. But the numbers you see on the screen do not match real-world tests. This matters because you rely on your meter for accurate work. The 9999 ticks promise is misleading because the internal ADC chip only has 6000 counts of genuine resolution. … Read more