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

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

Product ID: 225257474

Details

Brand
D YEDEMC
Colour
Red
Item weight
140 Grams
Power source
Battery
Style
OPM&VFL

🌈8 wavelength measurements

📏Test range -70dBm to +6dBm

🔌Universal FC/SC/ST & RJ45 interfaces

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COP 396914

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Elevate your fiber testing game — never miss a fault or a beat!

POWERFUL PORTABLE - Compact 140g design with built-in 1mW Visual Fault Locator replaces two devices in one sleek tool.
DUAL DISPLAY CLARITY - Simultaneously shows linear mW and non-linear dBm readings to keep you informed with precision.
SMART USER FRIENDLY - Features automatic shutdown, backlight options, wavelength memory, and user calibration for effortless operation.
UNIVERSAL COMPATIBILITY - Supports FC, SC, ST fiber connectors plus RJ45 testing for seamless integration across networks.
PRECISION AT EVERY WAVELENGTH - Measures 8 standard wavelengths from 850nm to 1650nm for unmatched testing versatility.

The D YEDEMC Fiber Optic Cable Tester is a lightweight, portable device combining an optical power meter and visual fault locator. It supports 8 standard wavelengths, universal fiber interfaces (FC/SC/ST), and RJ45 testing, with a test range from -70dBm to +6dBm. Designed for precision and ease, it features automatic shutdown, backlight, wavelength memory, and user calibration, making it an essential tool for professional fiber optic diagnostics.

Specifications

ASIN	B07XKH68B3
Best Sellers Rank	666,405 in DIY & Tools ( See Top 100 in DIY & Tools ) 504 in Network Testers
Brand	D YEDEMC
Colour	Red
Customer Reviews	4.6 4.6 out of 5 stars (1,268)
Item Weight	140 Grams
Manufacturer	Yide Machinery Co. Ltd.
Manufacturer Part Number	OPM
Model Number	OPM-VFL-1
Power Source	Battery Powered
Specification Met	IEC 61010-2-030, CE Marked, NIST Traceable
Style Name	OPM&VFL
UPC	782855705384
Upper Temperature Rating	60 Degrees Celsius

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