Is there a way to confirm it's v2 with sine wave and not v1?

In the description on my order it is listed as V2. On a scope, with the meter open circuit, the test waveform is a rounded square wave. When connected to a 100 ohm resistor, the waveform is more of a triangle wave. When connected to a capacitor, it is somewhere between a triangle and a sine wave.

can this meter perform a leak test on motor start capacitors?

No. This meter is for one test only - ESR of a capacitor. It does not perform any other tests.

Values in 35v and higher columns decrease as you go down, columns for 10,16,25v decrease, then go back up. is this a typo? hint: look for ".12"

Better to use on of the ESR charts you can find online, not the one printed on the case (whether it's right or wrong)

what is better about v2 (version 2) of this MESR-100 meter for the extra $10 it costs over the original version?

Compare MESR100 old V1 and new V2 Improvement: For an extra $10 I would get version 2 which is what I have now. 1) Change square wave to sine wave 100 KHz, reduce square wave’s high frequency component, and affect the reading passing the test leads and capacitor. 2) Higher Resolution up to 0.001 ohm. 3) 128X64 dot matrix LCD, with more larger value display and information 4) Embedded 25V capacitor table at LCD, auto display the capacitor is good or bad reference to common 25V electrolytic capacitor. 5) New plastic case, curve design for hand carrying. New stand for 60 degree stand on desk. 6) Use 2X AA battery, more convenience and longer battery life than 9V battery. 7) Support external USB power, using standard micro-USB port.

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Signstek MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor/Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing

Signstek MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor/Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing

Product ID: 316491826

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Details

Brand
Signstek
Power source
Battery
Style
Modern
Item weight
0.5 Pounds
Min. Operating voltage
15 Millivolts

⚡100kHz sine wave for precise ESR

📊0.001Ω high resolution accuracy

🔋80+ hours battery life with AA & USB

Description

🔧 Diagnose like a pro, fix with confidence!

SMART LCD DISPLAY - 128x64 dot matrix screen auto-references capacitor health with embedded 25V capacitor table.
ULTRA HIGH RESOLUTION - Detects resistance changes as low as 0.001Ω, ensuring you never miss a faulty capacitor.
SAFE IN CIRCUIT TESTING - Low voltage (<40mV RMS) testing prevents semiconductor activation, perfect for delicate electronics repair.
ERGONOMIC PORTABLE DESIGN - Curved plastic case with 60° stand and dual power options (AA batteries + USB) for on-the-go pros.
PRECISION AT 100 K HZ SINE WAVE - Eliminates noise with sine wave testing for ultra-accurate ESR readings in-circuit.

The Signstek MESR-100 V2 is a cutting-edge auto-ranging ESR LCR meter designed for in-circuit capacitor and low ohm testing. Featuring a 100kHz sine wave signal, ultra-high 0.001Ω resolution, and a smart LCD with embedded capacitor health references, it empowers professionals to quickly identify faulty capacitors without circuit removal. Its ergonomic design, dual power options (AA batteries and USB), and safe low-voltage testing make it an indispensable tool for electronics repair and maintenance.

Specifications

Manufacturer	Signstek
Part number	US-171024-02
Item Weight	227 g
Package Dimensions	16.89 x 9.5 x 4.9 cm; 226.8 g
Item model number	US-171024-02
Style	Modern
Power source type	Battery Powered
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

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