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 Fiber Power Meter FC/SC/ST Universal Interface Integrated OPM, VFL, and RJ45 Functions (OPM-VFL-1)

Product ID: 156169245

Details

Brand
D YEDEMC
Color
Yellow
Item Weight
140 Grams
Power Source
Battery
Style
OPM&VFL

📡8 wavelength measurements (850-1650nm)

🔋Battery powered, portable (140g lightweight)

🔌Universal FC/SC/ST & RJ45 interface

€ 66.49

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your fiber testing game—precision, portability, and power in your palm!

UNIVERSAL COMPATIBILITY - Supports FC, SC, ST connectors plus RJ45 testing—no adapter needed, just plug and test.
USER FRIENDLY PORTABLE - Lightweight 140g design with backlight, automatic shutdown, and wavelength memory for on-the-go pros.
RELIABLE READY FOR ACTION - Durable build meets UL and IEC standards, backed by lifetime friendly customer service.
ALL IN ONE TESTING POWERHOUSE - Integrated Optical Power Meter (OPM), Visual Fault Locator (VFL), and RJ45 tester in one sleek device.
PRECISION ACROSS 8 WAVELENGTHS - Measure from 850nm to 1650nm with pinpoint accuracy for all your fiber optic needs.

The D YEDEMC OPM-VFL-1 is a compact, battery-powered fiber optic cable tester combining an Optical Power Meter, Visual Fault Locator, and RJ45 tester. It supports 8 standard wavelengths (850-1650nm), universal FC/SC/ST interfaces, and offers precise measurements from -70dBm to +6dBm. Lightweight at 140g, it features backlight, automatic shutdown, wavelength memory, and user calibration, making it an essential tool for network professionals seeking accuracy and convenience.

Specifications

ASIN	B07XKH68B3
Best Sellers Rank	#7,188 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Network & Cable Testers
Brand Name	D YEDEMC
Color	Yellow
Customer Reviews	4.6 4.6 out of 5 stars (1,336)
Item Weight	140 Grams
Manufacturer	Yide Machinery Co. Ltd.
Measurement Type	Powermeter
Model	OPM-VFL-1
Part Number	OPM
Power Source	Battery Powered
Specification Met	Ul 61010-1, Iec 61010-2-030
Style Name	OPM&VFL
UPC	782855705384
Upper Temperature Rating	60 Degrees Celsius

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