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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🔴 Power up your fiber testing game with precision and portability!

SMART USER FEATURES - Auto shutdown, backlight control, wavelength memory, and user calibration for effortless operation.
UNIVERSAL COMPATIBILITY - Seamlessly test FC, SC, ST connectors plus RJ45 for versatile network diagnostics.
COMPACT PORTABLE DESIGN - Lightweight 140g tester fits perfectly in your toolkit for on-the-go professionals.
PRECISION ACROSS 8 WAVELENGTHS - Measure from 850nm to 1650nm with pinpoint accuracy for all your fiber needs.
DUAL FUNCTION POWER FAULT LOCATOR - Combine optical power metering and visual fault detection in one sleek device.

The D YEDEMC Fiber Optic Cable Tester is a compact, battery-powered device that measures optical power across 8 standard wavelengths (850-1650nm) with a test range of -70dBm to +6dBm. Featuring a built-in 2mW red light visual fault locator, universal FC/SC/ST and RJ45 interfaces, and smart functions like auto shutdown and wavelength memory, it offers professional-grade testing in a portable 140g package.

Reviews

S**N

Best One

Best power meter good working

25.10.2024

V**I

Nice product

Good product but brochere should provide explanation with how to.measure different values.

18.09.2025

S**S

Nice

Nice productEasy to useMulti functions

26.08.2025

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Brand	D YEDEMC
Power Source	Battery Powered
Style	OPM&VFL
Colour	Red
Item Weight	140 Grams
Specification Met	IEC 61010-2-030, CE
Upper Temperature Rating	6E+1 Degrees Celsius
Measurement Type	Optical Power Meter
UPC	782855705384
Manufacturer	Yide Machinery Co. Ltd.
Model number	OPM-VFL-1
Number of Memory Sticks	1
Item Weight	140 g
Package Dimensions	12.8 x 7.8 x 6.2 cm; 140 g
Item model number	OPM-VFL-1
Are batteries included?	No

D YEDEMC Fiber Optic Cable Tester Portable Optical Fiber Power Meter FC/SC/ST Universal Interface Fiber Tester Built-In 2Mw Visual Fault Locator (OPM&VFL), Red

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