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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Description

⚡ Test Smarter, Not Harder – Stay Ahead in Every Circuit!

INSTANT REFERENCE - Includes a printed ESR table for quick, on-the-spot component verification—no guesswork required.
COMPACT PORTABLE - Lightweight 0.5 lb design fits perfectly in your toolkit for on-the-go professional troubleshooting.
COMPREHENSIVE RANGE - Measures from 0.01Ω to 100Ω, covering all your low resistance and capacitance testing needs.
PRECISION MEETS SPEED - Auto-ranging ESR and low ohm meter delivers fast, accurate in-circuit readings every time.
EFFORTLESS DIAGNOSTICS - Dual terminal setup lets you inspect capacitors and resistors with unmatched ease and efficiency.

The Signstek MESR-100 V2 is a battery-powered, auto-ranging ESR and low ohm meter designed for precise in-circuit testing of capacitors and resistors. With a measurement range from 0.01 to 100 ohms and a dual terminal design, it offers fast, reliable diagnostics complemented by a handy printed ESR reference table. Compact and lightweight, it’s the essential tool for professionals demanding accuracy and efficiency in electrical testing.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Brand	Signstek
Power Source	Battery Powered
Style	Circuit Testers
Color	Black
Item Weight	0.5 Pounds
Min. Operating Voltage	15 Millivolts
Measurement Type	LCR Meter
UPC	710219731090
Manufacturer	Signstek
Part Number	US-171024-02
Item Weight	8 ounces
Package Dimensions	6.54 x 3.7 x 1.93 inches
Item model number	US-171024-02
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

Signstek MESR-100 V2 Auto Ranging in Circuit ESR Meter Capacitor Tester/Low Ohm Meter Up to 0.01 to 100R, Support in Measuring Capacitance Resistance Circuit

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