Fiber Power Meter & Optical Light Source Kit - Single-Mode (FPL-5050)

Ships direct from the manufacturer. Please allow up to 10 business days, though it often ships sooner.

The Jonard Tools FPL-5050 is a single-mode optical loss test set in a case: the FPM-50A power meter at one end of the fiber and the FLS-50 light source at the other, which together measure the one number that matters on an installed link, how much light is lost between the two ends. The meter reads absolute optical power from −50 to +26 dBm across 800 to 1700 nm, so it reads any source you're likely to meet, and switches to relative mode to show loss in dB against a reference you set. The light source puts out stable 1310 nm and 1550 nm, the two single-mode windows, so a link can be tested at both wavelengths the way a certification calls for. Both units have a backlit display with intelligent backlight control to stretch the batteries, an auto-off you can turn on or off, and FC, SC, and LC adapters, and they come with pouches, batteries, and cleaning swabs in a rugged carrying case with straps.

What's in the Kit

• FPM-50A fiber optic power meter. Measures absolute optical power and relative power loss on fiber optic cables, −50 to +26 dBm, across 800 to 1700 nm, with FC, SC (APC/PC/UPC), and LC (PC/UPC) adapters. Intelligent backlit control reduces power consumption, and the auto-off can be turned on or off. Supplied with a protective cover, nylon pouch, three AA batteries, and cleaning swabs.
• FLS-50 optical light source. Stable single-mode source at 1310 nm and 1550 nm (±20 nm), with SC, ST, FC, and FC-LC adapters. Supplied with a storage pouch, three AA batteries, and cleaning swabs.
• H-22 rugged carrying case with straps. Keeps the meter, the source, the adapters, and the reference cords together between jobs.

Where It Fits

It suits installers certifying single-mode links by insertion loss at 1310 and 1550 nm after the connectors are on, data center and campus backbone work where a loss budget has to be documented, FTTH and MDU fiber drops that need a power reading at the ONT, telecom and ISP technicians checking receive power at a transceiver, troubleshooting a link that's up but running with errors, and a contractor who wants a loss test set that covers the connector types on the job without a drawer of adapters.

Good to Know

A loss test is a two-step measurement. First, set the reference: connect the light source to the meter through a clean reference cord, choose the wavelength, and zero the meter in relative mode so it reads 0 dB. Then insert the link under test between the reference cord and the meter, and the meter reads the link's loss in dB directly. Test at both 1310 and 1550 nm; 1550 is more sensitive to bends, so a link that passes at 1310 and fails at 1550 usually has a tight bend or a crushed cable somewhere. The meter reads any wavelength from 800 to 1700 nm, so it will read a multimode 850 or 1300 nm source too, but the light source in this kit is single-mode only; multimode links need an 850/1300 source and multimode reference cords. Keep APC and UPC apart: the meter's adapters accept APC connectors, but the light source's are PC/UPC, and an APC plug mated to a UPC port damages the end face and ruins the measurement. Clean every connector before every mating, including the reference cord and the port on the instruments; the swabs in the box are for that, and most bad readings are dirt. Absolute power is in dBm and loss is in dB, and the meter's mode decides which you're looking at. Never look into the light source or a live fiber; the light is infrared and invisible. The meter can be calibrated in the field, and the steps are in the documentation below; a reading that drifts from a known source is the reason to do it. Both units run on three AA cells each, included, and the auto-off can be disabled for a long test.

Specifications

Documentation