what is the max distance this unit will test?

I am assuming you are talking about the laser. From my experience, it is only short distance such as a fiber enclosure. Or pig tail inside the node.

Is it supposed to come with an adapter for sc and st? mine came with no adapters. how to connect st to the meter?

I did not receive one either. I can not find one made for it. But it was pretty accurate compared to my old light meter with blue and green.

Is there a digital version of the user guide? My unit didn't come with instructions.

Not sure. The great part is it only does basically 3 things. play with the buttons for a couple minutes you know more than the manual. 1) cable fault locator (red laser/on off). 2) function key sets db reading (check light level). toggle to RG45 you can check for faults on ethernet. That’s it, good luck

What about lc interface ? i work with lc connections most

Lc is can't.It suit for SC/FC/ST.

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🚀 Elevate your fiber testing game with precision and power in your pocket!

SMART USER FRIENDLY - Features auto shutdown, backlight options, wavelength memory, and user calibration for effortless, professional use.
UNIVERSAL COMPATIBILITY - Seamlessly test fiber connections with FC, SC, ST interfaces plus RJ45 support—one tool for every job.
ALL DAY POWER ZERO DOWNTIME - Enjoy up to 72 hours of continuous operation on a single battery charge—stay productive without interruptions.
PRECISION ACROSS THE SPECTRUM - Measures 8 standard wavelengths from 850nm to 1650nm with ±0.05dB accuracy for flawless fiber diagnostics.
VISUAL FAULT LOCATOR INCLUDED - Built-in 1mW red light source quickly identifies fiber breaks and faults, saving you time on troubleshooting.

The D YEDEMC Fiber Optic Cable Tester is a compact, battery-powered device designed for professional fiber diagnostics. It supports 8 standard wavelengths (850-1650nm) with high accuracy (±0.05dB), features universal FC/SC/ST and RJ45 interfaces, and includes a built-in 1mW visual fault locator. With a 72-hour battery life, auto shutdown, backlight, and user calibration, it ensures reliable, efficient testing for network managers and technicians.

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Manufacturer	Yide Machinery Co. Ltd.
Part number	OPM
Item Weight	140 g
Package Dimensions	12.8 x 7.8 x 6.2 cm; 140 g
Item model number	OPM-VFL-1
Color	Red
Style	OPM&VFL
Material	Other
Power source type	Battery Powered
Item Package Quantity	1
Specification met	IEC 61010-2-030, CE Marked, NIST Traceable
Batteries Included?	No
Batteries Required?	No

D YEDEMC Fiber Optic Cable Tester Portable Optical Power Meter FC/SC/ST universal interface Fiber Tester Built-in 1Mw Visual Fault Locator (OPM&VFL)

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