JDW | 121GW Multimeter REVIEW [2023] @JDW- | Uploaded March 2023 | Updated October 2024, 3 hours ago.
I take a detailed look at the 121GW from Dave Jones of EEVBlog and compare with the Fluke 116, Fluke 8845A, DE-5000 and M-830B.
👉 See my follow-up Review of Probe Master leads here: youtu.be/IvTr10HnOV0

🔎 INDEX
0:00 — Intro
2:20 — Unboxing
3:17 — Manuals & Add-ons
4:01 — Power ON & Firmware
5:49 — Battery Life
6:27 — Changing Batteries & SD Card Slot
8:20 — Auto Power Off (APO)
11:29 — LCD Contrast
13:33 — LCD Cover Issues
16:33 — Kick Stand, Probe Holders & Wobble Woes
19:08 — Included Probes
21:35 — Typical Uses for DMMs
21:57 — Continuity Checking
27:19 — 50,000 Count Display & Resistivity Measuring
35:09 — AC Voltage Measurements
35:59 — DC Voltage Measurements
36:34 — DC Current Measurements
43:33 — Capacitance Measurements
51:20 — Data Logging
1:00:23 — Secondary Display, Mode Memory, Dual Temp. Sensing
1:03:59 — 15V Diode Test (Zeners)
1:05:20 — Volt Amp (Watts DC) Measurements
1:06:17 — Frequency Measurements
1:06:53 — Closing Thoughts

🛒 STUFF TO BUY
• EEVBlog 121GW: https://eevblog.store/products/121gw-multimeter
• Fuse Pack: https://eevblog.store/products/multimeter-fuse-pack
• Soft Case: https://eevblog.store/products/bm235-121gw-case
• UEi Aligator Clips (2 types): amzn.to/3kDcy3I (121GW includes UEi ATL57 probes without alligator clips)

BETTER PROBES & ALLIGATOR CLIPS
• Probe Master 8043S: bit.ly/3y8P6i3
• Probe Master 8043SK: bit.ly/41MDJK0
• Brymen BM235 Probes: ebay.to/3ERSQrJ
• Brymen Aligator Clips: ebay.to/3ZCXqlR

OTHER METERS
• Brymen BM786: bit.ly/3KX9KcC
(Cheaper and good alternative to 121GW if you don't need Data Logging.)
BM786 VIDEO Review by @KissAnalog : youtu.be/YHuy2PYNq68
• 830B (cheap!): amzn.to/3ZEw0vL
• DE-5000 (LCR): amzn.to/3KWrMM4
• Fluke 116: amzn.to/3IMJNJT
• Fluke 8845A: ebay.to/3msP6Xm

FOR SUPER LOW BURDEN CURRENT MEASUREMENTS
• CurrentRanger (replaces discontinued µCurrent): bit.ly/3IcOkoT

📱 APP (for 121GW Data Logging)
• Meteor: apple.co/3F00ErB
• Official iOS app info: bit.ly/3SVcBVq
• Android & Windows apps are downloadable from the 121GW product page.

📚 REFERENCE
• 121GW Manual & Schematic: click "Documentation" at left on product web page.
(FIRMWARE updates also found on the same page.)
• HACKED Firmware to Disable MODE MEMORY: bit.ly/3mLDi2Q
• Meter Comparison Chart (Excel file): bit.ly/3xPBVCd
(Source: bit.ly/3Solyq4 )
• 121GW REVIEW (older model w/Brymen BM235 probes): bit.ly/2ZBZ8pl
• 121GW Development History VIDEO: youtu.be/e9cpKN69Avk
• 830B Meter USAGE: https://jbryant.eu/pages/DMM.htm
• Check TRANSISTORS with any meter: youtu.be/2IkAPU9X33k
• µCurrent Manual, for a good explanation of Burden Voltage: bit.ly/3ZFxQfV
• 121GW Data Logging limited to 600,000 entries: bit.ly/3mqKHo1
• METER Counts, Resolution & Accuracy: bit.ly/3yhrMi9
• Counts vs. Digits: bit.ly/3FdiVSx
• Dave Jones' @EEVblog VIDEO on Gold Plated Probes: youtu.be/uV9mW0rpRxg

🙏 HUMBLE THANKS to these generous Paypal supporters (Feb. 2022 - Mar. 2023):
• Philippe Astier 🇫🇷 (monthly supporter)
• Gavin Maxwell 🇦🇺 (monthly supporter)
• Christian Rueckert 🇨🇭
• Frank Conforti 🇺🇸 (significant supporter)
• Eugene Gillott 🇨🇦
• Mauro Acciaccaferri 🇮🇹 (monthly supporter)

🙏 SPECIAL THANKS to Mr. Fahrenheit who advised me during the editing of this video about the similarity of "121GW" to "1.21 Jigawatts"!

💰HOW TO SUPPORT THIS CHANNEL
paypal.me/supportJDW

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#121GW #Multimeter #EEVBlog #JDW1