sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Overview
The Jonard Tools FLS-55 is a precision fiber optic light source designed to provide stable 850/1300 nm (multimode) or 1310/1550 nm (singlemode) wavelengths. This unit is engineered for field measurements, facilitating the assessment of optical loss in fiber cable networks when paired with a compatible optical power meter.
Built for durability and ease of use in diverse environments, the device features a shatter-resistant sleeve and a flush-button design to protect against damage and contaminants. It provides a backlit LCD for operation in low-light conditions and includes versatile adapter support for FC, SC, and LC connectors, covering both PC and UPC polish types.
Key Features
-
Dual-Mode Capability
Supports both 850/1300 nm and 1310/1550 nm wavelengths for versatile multimode and singlemode testing. -
Multiple Modulation Outputs
Features CW, 270 Hz, 1 kHz, and 2 kHz modulation outputs to support various testing protocols. -
Universal Connector Support
Ships with FC, SC, and LC adapters for direct compatibility with common fiber interfaces. -
Shatter-Resistant Design
Constructed with a protective sleeve to minimize damage from accidental drops or impacts. -
Flush-Button Interface
Engineered to prevent dust ingress and accidental operation in the field. -
Backlit Display
LCD screen ensures visibility during work in dim or dark environments.
Applications
- Fiber optic cable loss testing
- Multimode fiber network certification
- Singlemode fiber network certification
- Fiber installation and maintenance
Package Contents
- FLS-55 Fiber Optic Light Source
- SC, FC, and LC Adapters (2 each)
- Cleaning Swabs (2)
- AA 1.5V Alkaline Batteries (3)
- Storage Pouch
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Jonard Tools |
| Part Number | 054X238 |
| Model | FLS-55 |
| Wavelengths (MM) | 850 / 1300 nm |
| Wavelengths (SM) | 1310 / 1550 nm |
| Modulation Outputs | CW, 270 Hz, 1 kHz, 2 kHz |
| Operating Temperature | 14°F to 140°F |
| Power Supply | 3 x AA 1.5V Alkaline Batteries |
Frequently Asked Questions
What adapters are included with the FLS-55?
The device comes with FC, SC, and LC adapters for both PC and UPC connections.
Is this unit compatible with APC connectors?
No, the FLS-55 is designed for PC and UPC connectors.
Does the LC adapter affect signal loss?
Yes, the LC adapter may introduce up to 0.3 dB of signal loss.
What is the operating temperature range?
The light source is rated for operation from 14°F to 140°F.
Does it include a storage pouch?
Yes, a storage pouch is included in the package contents.



