sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Overview
The Jonard Tools FPM-50S is a versatile, compact optical power meter designed for precise measurements of absolute optical power and relative power loss in fiber optic networks. Integrating multiple testing functions into a single handheld device, it serves as an essential tool for fiber technicians and network installers working in diverse field environments.
Equipped with a built-in 2 mW visual fault locator (VFL) and a network cable tester, the FPM-50S streamlines the troubleshooting process. The device operates across 10 pre-calibrated wavelengths, covering standard single-mode and multi-mode applications. Its robust design, combined with an intuitive backlit LED display and extended battery life, ensures reliable performance during long-term field maintenance and installation projects.
Key Features
-
Broad Wavelength Calibration
Features 10 preset calibrated wavelengths (850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, and 1650 nm) for accurate measurements across multiple fiber types. -
High-Resolution Measurement
Provides precise power level readings with a resolution of 0.01 dB, allowing for exact identification of signal degradation. -
Integrated Visual Fault Locator
Includes a built-in 2 mW VFL to quickly locate breaks, bends, or faulty connectors in fiber optic cabling. -
Network Cable Tester
Features an RJ45 port with a built-in remote for verifying continuity and identifying wiring issues in Ethernet networks. -
Backlit LED Interface
Clear, illuminated display ensures visibility when testing in dimly lit environments like basements or utility closets. -
Power Saving Functionality
Equipped with an automatic power-off feature after 10 minutes of inactivity to maximize battery life. -
Long Battery Life
Offers more than 120 hours of operation from two standard AAA batteries for extended field use.
Applications
- Fiber optic power measurement and loss testing
- FTTH network installation and maintenance
- Ethernet network troubleshooting
- Fiber fault location
- Data center cabling verification
Package Contents
- Mini Optical Power Meter
- FC Adapter (for APC/PC/UPC)
- LC Adapter (for PC/UPC)
- Instruction Manual
- (2) AAA Batteries
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Jonard Tools |
| Model | FPM-50S |
| Part Number | 054X484 |
| Detector Type | InGaAs |
| Connector Types | FC (APC/PC/UPC) & LC (PC/UPC) |
| Measurement Range | -50 dBm to +26 dBm |
| Calibrated Wavelengths | 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm |
| Resolution | 0.01 dB |
| Operating Time | ≥ 120 hours |
| Battery Type | 2 x AAA |
| Dimensions | 4.36 in x 2.66 in x 1.09 in |
| Weight | 0.3 lb (136.2 g) |
Frequently Asked Questions
Can this meter test both single-mode and multi-mode fiber?
Yes, the unit is calibrated for both single-mode wavelengths (including 980, 1310, 1550 nm) and multi-mode wavelengths (850, 1300 nm).
What types of fiber connectors are compatible?
The device includes adapters for FC (APC/PC/UPC) and LC (PC/UPC) connector types.
Does the device include batteries?
Yes, the FPM-50S ships with two AAA batteries required for operation.
What is the purpose of the VFL?
The built-in 2 mW Visual Fault Locator is used to visually identify physical faults such as breaks, macro-bends, or faulty terminations in the fiber line.
Can I use this to test Ethernet cables?
Yes, the meter features a built-in RJ45 port and remote for verifying continuity in network cables.



