OTDR & Test Instruments

K-310 Fiber Comprehensive Tester

The FTTH door-step box: OTDR, power meter, light source, VFL, event map, network cable test and a work lamp in one 5-inch tester.

Functions: OTDR, optical power meter, light source, visual fault locator, event map, network cable test (sequence and length), LED lighting
OTDR wavelengths: By build: 1310/1550 nm dual-wavelength (K-310-D); 1310/1550 nm live-fiber build with automatic wavelength selection (K-310-N); 1625 nm filtered live-fiber build (K-310-F); 850/1300 nm multimode build (K-310-M)
OTDR dynamic range: 22/20 dB; 20 dB on the 1625 nm build
Distance range: 0.5 to 160 km
Event dead zone: 2 m

Single-wavelength build — 1310 or 1550 nm, 22/20 dBDual-wavelength build — 1310/1550 nm, 22/20 dBSingle-wavelength build with filter — 1310 or 1550 nm, 22/20 dB1625 nm build with filter — 20 dB, for live-fiber work

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Key features

Seven functions in one box: OTDR, optical power meter, light source, visual fault locator, event map, network cable test and LED lighting — the whole FTTH checklist without swapping instruments
An event map (optical eye) that draws the drop line's faults in plain view — the answer a new installer can read, with the full OTDR trace behind it when you want the detail
Four OTDR builds at an honest 22/20 dB: single or dual wavelength, and filtered builds — including 1625 nm — that can test live fiber
The cable test covers the other half of the install: wire sequence and length on the Ethernet run, with open circuits, short circuits and crossed pairs called out
Built for the doorstep and the dark cabinet: 5-inch touch screen with gesture operation, a work lamp, live-signal protection on the OTDR, and a lithium battery past 10 hours

Specifications

Functions	OTDR, optical power meter, light source, visual fault locator, event map, network cable test (sequence and length), LED lighting
OTDR wavelengths	By build: 1310/1550 nm dual-wavelength (K-310-D); 1310/1550 nm live-fiber build with automatic wavelength selection (K-310-N); 1625 nm filtered live-fiber build (K-310-F); 850/1300 nm multimode build (K-310-M)
OTDR dynamic range	22/20 dB; 20 dB on the 1625 nm build
Distance range	0.5 to 160 km
Event dead zone	2 m
Attenuation dead zone	10 m
Pulse widths	5 ns to 20 µs
Distance accuracy	±(1 m + sampling resolution + distance × 0.005%)
Linearity	±0.05 dB/dB
Fiber type	Single-mode
Display	5-inch 800 × 480 capacitive touch screen
Optical connector	FC / SC / ST / LC universal
Storage	4 GB or 8 GB
Optical power meter	Built-in: InGaAs, -50 to +16 dBm (grade A) or -50 to +26 dBm (grade B), 800–1700 nm, calibrated at 850/980/1300/1310/1490/1550/1625 nm
Light source	Built-in: 1310/1550 nm, output ≥ -7 dBm
Visual fault locator	Built-in, 650 nm, FC/UPC interface
Network cable test	Wire sequence and length; detects open circuit, short circuit and disordered (crossed) pairs
Battery	Lithium battery, >10 h continuous working

Where it works

FTTH activation and repair visits — drop testing, power checks and in-home cable runs in one call
Last-mile and access-network maintenance for ISP and contractor crews
Event-map fault finding by installers who do not read OTDR traces every day
Live-fiber checks on short spans with the filtered builds