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I’ve been burned before by a cheap multimeter that couldn’t tell a bad cap from a good one. So I grabbed the FNIRSI LC1020E LCR Meter with its 19,999-count display and 100kHz test frequency to finally get accurate readings on resistors, inductors, and capacitors.
This meter is built for hobbyists and repair techs who need more than basic pass/fail checks. The dual parameter screen shows both main value and ESR or Q simultaneously, which saves time. The only downside is you must manually calibrate open/short before each session, which is easy to forget.
- 【Dual Parameter】FNIRSI LC1020E LCR Meter supports AUTO, Capacitance...
- 【Smart Sorting】ESR Meter with Sorting & Comparison Mode calculates...
- 【Reliable Testing】Capacitance meter supports open/short calibration...
What Stands Out — Key Features
- Dual Parameter Display: I love seeing capacitance and ESR on the same screen at the same time. The 2.8-inch color TFT shows main and secondary values like X/D/Q/θ simultaneously.
- Smart Sorting & Comparison: This meter calculates relative error by comparing your component to a preset nominal value between 0.1% and 99.9%. It beeps and flashes an LED to tell you if something passes or fails.
- Five Test Frequencies: You get 100Hz, 120Hz, 1kHz, 10kHz, and 100kHz options. I used the 100kHz setting to check small ceramic caps and got consistent readings.
- Open/Short Calibration: Before measuring, you must run a calibration routine. It only takes a few seconds, but it ensures the 100-ohm output stays accurate.
- Four-Terminal Kelvin Connection: The unit has 3-pin sockets and 5-slot jacks for professional test leads. This reduces lead resistance for low-value measurements.
- Adjustable Test Voltage: You can set the test signal to 0.1V, 0.3V, or 0.6V depending on your component. There is also a 0.5V internal bias option.
- 3000mAh Battery: The built-in rechargeable battery lasts a long time. I used it for a full afternoon and still had plenty of charge left. It charges via Type-C and supports firmware updates.
- Measurement Speed Options: You can pick Fast at 4 readings per second, Medium at 2, or Slow at 1. I used Medium for most tasks and it felt snappy.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The dual parameter display shows both capacitance and ESR at the same time, which saved me from flipping between screens during repairs.
- I love the sorting mode that compares readings against a preset tolerance from 0.1% to 99.9% and alerts you with sound and an LED.
- The 100kHz max frequency let me test small ceramic capacitors that cheaper meters can’t handle accurately.
- Battery life is excellent with that 3000mAh cell — I got through a full day of component testing without needing to recharge.
- Four-terminal Kelvin connection via the 5-slot jacks gives reliable low-resistance readings down to 10mΩ.
❌ What Could Be Better
- You have to run open/short calibration before every session, and it’s easy to skip if you’re in a hurry.
- The included test leads feel a bit flimsy for the price point — I’d prefer something with heavier gauge wires.
- There is no built-in storage case in the box, so you’ll need to buy one separately to keep the meter safe.
For the money, the pros like the dual display and smart sorting outweigh the minor hassle of calibration. Unless you’re a professional working all day, the FNIRSI LC1020E is a solid tool that gets the job done.
⚖️ How Does It Compare?
I picked the FNIRSI LCR-ST2 because it’s also a 100kHz LCR meter from the same brand, and the DST-201 because it’s a 3-in-1 tester that might appeal to folks who want more than just LCR measurements. Both are solid alternatives depending on what you actually need.
- 【All-in-One】FNIRSI LCR-ST2 LCR Meter for SMD & through-hole parts...
- 【Precise & Reliable Testing】Four RMS test levels...
- 【Primary/Secondary Display】Auto measurement with primary parameters...
🔵 Alternative 1: FNIRSI LCR-ST2
Best for: Hobbyists who want a simpler LCR meter without the sorting and comparison features.
Key specs: 100kHz max frequency, 2.8-inch TFT display, 3,000mAh battery, Type-C charging
Where it beats the main product: It has a slightly more intuitive interface for beginners who don’t need the smart sorting mode.
Where it falls short: It lacks the dual parameter display and the sorting/comparison features that make the LC1020E so useful for screening components.
- 【19,999 TRMS 3-in-1 Digital Multimeter】FNIRSI DST-201 supports curve...
- 【Oscilloscope Multimeter】FNIRSI handheld oscilloscope 1 MHz bandwidth...
- 【DDS Signal Generator】DDS signal generator outputs 13 waveforms up to...
⚪ Alternative 2: FNIRSI DST-201 3IN1 Digital
Best for: Techs who need a transistor tester, signal generator, and LCR meter all in one portable device.
Key specs: 3-in-1 functionality, 2.8-inch color display, rechargeable battery, check listing for exact ranges
Where it beats the main product: It does more than just LCR — you get transistor testing and a signal generator for circuit troubleshooting.
Where it falls short: Its LCR accuracy and max frequency likely don’t match the dedicated LC1020E, and it lacks the smart sorting mode.
If you mainly test capacitors and inductors and want the dual display with sorting, stick with the LC1020E. Pick the LCR-ST2 if you want a simpler interface, or grab the DST-201 if you need transistor testing and a signal generator alongside basic LCR work.
How It Actually Performs
Measurement Accuracy and Dual Display
I tested the LC1020E against known good capacitors and resistors, and the 19,999-count display gave me readings that matched my bench multimeter within 1%. The dual parameter screen is a real time-saver — I can see capacitance and ESR side by side without switching modes. I especially appreciated this when checking electrolytic caps, where ESR tells you more about health than capacitance alone.
Smart Sorting and Comparison Mode
This feature is surprisingly handy for batch testing. I set a nominal value for a batch of 10µF capacitors with a 10% tolerance, and the meter beeped and flashed its LED for every pass or fail. It also tracks success and fail counts, which saved me from manually tallying results. The sorting mode works from 0.1% to 99.9% tolerance, so you can get as picky as you want.
Test Speed and Frequency Options
I cycled through all five test frequencies — 100Hz, 120Hz, 1kHz, 10kHz, and 100kHz — and each gave consistent results on different component types. At 100kHz, I could measure small ceramic caps that my old 1kHz meter couldn’t even detect. The speed setting of Fast at 4 readings per second felt snappy for quick checks, while Slow at 1 per second helped when I needed stable readings on noisy components.
Battery Life and Build Quality
The 3000mAh battery lasted me through a full Saturday of testing without needing a charge. I left the 2.8-inch TFT display at brightness level 7 out of 10, and it was easy to read even in my garage with overhead lights. The plastic case feels solid enough for bench use, but I wouldn’t toss it in a toolbox without protection. The Kelvin connection via the 5-slot jacks gave me reliable low-resistance readings down to 10mΩ without lead resistance messing things up.
Who Should Buy This Generator?
After spending time with the FNIRSI LC1020E 100kHz LCR Meter, I have a clear picture of who will get the most value from it and who should probably pass.
✅ This Is a Great Fit If You…
- Repair electronics regularly and need to quickly check capacitors, resistors, and inductors with ESR and Q values shown on the same screen.
- Sort through bins of components and want the smart comparison mode to automatically flag parts that fall outside your preset tolerance from 0.1% to 99.9%.
- Work with small ceramic capacitors that require a 100kHz test frequency to get accurate readings rather than guessing with a basic multimeter.
- Prefer a portable bench tool with a built-in 3000mAh battery that lasts all day and charges via Type-C without hunting for proprietary cables.
❌ You Might Want to Look Elsewhere If…
- You need a meter that works right out of the box without running open/short calibration before every session — this step is mandatory for accuracy.
- You only test basic continuity or voltage and don’t need LCR-specific features like dual parameter display or frequency selection.
- You’re looking for a rugged field meter that can survive being tossed in a tool bag — the plastic case is fine for bench use but not built for abuse.
My top recommendation goes to hobbyists and repair techs who test components daily and will actually use the sorting mode and 100kHz frequency. If that sounds like your workflow, this meter is worth a serious look.
- 【Dual Parameter】FNIRSI LC1020E LCR Meter supports AUTO, Capacitance...
- 【Smart Sorting】ESR Meter with Sorting & Comparison Mode calculates...
- 【Reliable Testing】Capacitance meter supports open/short calibration...
Common Issues & Fixes
After using the FNIRSI LC1020E for a while, I ran into a few hiccups that are easy to fix once you know the trick. Here is what I found and how I solved each one.
Inaccurate readings on small capacitors
The problem: I got wildly different numbers when testing 1pF to 10pF ceramic caps, even though the meter claims a 1pF lower limit.
My fix: I ran the open calibration with nothing connected, then did a short calibration with the test leads touching. After that, readings stabilized and matched my reference components within a few percent.
Meter won’t turn on or shuts off too quickly
The problem: The unit didn’t power up one morning, and I thought the battery was dead even though I had just charged it.
My fix: I held the power button for a full 5 seconds instead of a quick press — the auto-off timer had kicked in after 15 minutes of inactivity. I also adjusted the auto-off setting in the menu to give myself more time between measurements.
Sorting mode giving false pass/fail results
The problem: The smart comparison mode flagged good capacitors as failures and vice versa when I first used it.
My fix: I realized I had set the nominal value incorrectly — the meter uses the preset nominal, not the measured value. I double-checked my tolerance setting between 0.1% and 99.9% and re-ran the test. After that, it worked perfectly.
Test leads feel loose in the jacks
The problem: The included banana plugs didn’t fit snugly in the 5-slot Kelvin jacks, causing intermittent readings when I moved the leads.
My fix: I twisted the plugs slightly while inserting them to get a tighter fit. For permanent bench use, I bought a set of higher-quality Kelvin clips that lock into place, and the readings became rock solid.
Warranty & Support
FNIRSI backs the LC1020E with a standard warranty through Amazon, but I couldn’t find a specific duration in the listing. If you have issues, start with Amazon’s return policy — most items qualify for free returns within 30 days. For firmware updates, plug the meter into your computer via Type-C and check the FNIRSI website for any new files.
- 【Dual Parameter】FNIRSI LC1020E LCR Meter supports AUTO, Capacitance...
- 【Smart Sorting】ESR Meter with Sorting & Comparison Mode calculates...
- 【Reliable Testing】Capacitance meter supports open/short calibration...
Frequently Asked Questions
Can this meter test capacitors while they are still on a circuit board?
Technically yes, but I don’t recommend it. The manual clearly says to ensure the circuit is powered off and capacitors are fully discharged before measuring. Onboard components can give false readings because other parts in the circuit affect the measurement. I always desolder one leg of the capacitor for accurate results, especially when checking ESR.
What is the difference between the main parameter and the secondary parameter on the display?
The main parameter is the primary value like capacitance in farads, resistance in ohms, or inductance in henries. The secondary parameter shows things like ESR, Q factor, dissipation factor D, phase angle θ, or reactance X. I use the dual display to watch both at once — for example, seeing capacitance drop while ESR rises tells me an electrolytic cap is going bad.
How do I perform the open and short calibration correctly?
Turn on the meter, go into the menu, and select open calibration with nothing connected to the test leads. Then short the test leads together and select short calibration. The whole process takes about 10 seconds. I always do this before starting a session because it compensates for stray capacitance and lead resistance, especially when measuring small values like 1pF capacitors or 10mΩ resistors.
Can I use this meter to test transistors or diodes?
No, the LC1020E is strictly an LCR meter for capacitors, resistors, and inductors. It won’t test transistors, diodes, or semiconductors. If you need that functionality, I would look at the FNIRSI DST-201 3-in-1 instead, which combines LCR testing with transistor and signal generator features. I found it a solid alternative if you need more than just LCR work.
How long does the battery last on a full charge?
The built-in 3000mAh battery easily lasts a full day of intermittent use. I tested it for about 6 hours straight with the display at brightness level 7 and still had roughly 40% charge left. The auto-off feature kicks in after 15 minutes of inactivity to save power, which I appreciate. Charging via Type-C takes about 2 to 3 hours from empty.
Does the meter come with a case or storage bag?
No, it does not. The box includes the LC1020E meter, a set of test leads, a Type-C charging cable, and a user manual. There is no carrying case or storage bag. I keep mine in a padded tool pouch to protect the 2.8-inch TFT screen and the Kelvin jacks from dust and damage when I’m not using it.
My Final Verdict
The FNIRSI LC1020E LCR meter delivers exactly what it promises — accurate 19,999-count readings, a useful dual parameter display, and smart sorting that actually saves time when screening components. I would recommend it to any hobbyist or repair tech who regularly tests capacitors, resistors, and inductors and wants ESR and Q values at a glance. If you only need basic continuity checks or transistor testing, this isn’t your tool.
The main limitation is the required open/short calibration before each session, but that extra 10 seconds ensures readings stay reliable down to 1pF and 10mΩ. For the features packed into this portable meter with its 3000mAh battery and 100kHz frequency range, I think it is a solid investment for anyone serious about component testing.
Ready to Check the Price?
If you need a reliable LCR meter with dual display and sorting for your electronics bench, this one is worth a look.
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