sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Overview
The Jonard Tools FPM-50A is a precision fiber optic power meter engineered for measuring absolute optical power and relative power loss in both single mode and multimode fiber optic networks. It provides accurate performance across a wide wavelength range, making it a versatile tool for fiber technicians and network operators.
Constructed for demanding field environments, the device features a durable, shatter-resistant sleeve and a dust-proof button interface. The unit includes an LCD backlight for operation in low-light conditions and supports over 130 hours of continuous use on a single set of batteries, ensuring reliability during extended field deployment.
Key Features
-
Wide Wavelength Range
Covers 800 nm to 1650 nm, supporting all standard fiber network wavelengths. -
High Precision Calibration
Features 6 preset wavelengths for accurate measurement with 0.01 dB resolution. -
Manual Calibration Function
Allows users to manually calibrate the device as required for specific applications. -
Field-Ready Durability
Equipped with a shatter-resistant sleeve and dust-proof buttons for longevity. -
Backlit LCD
Ensures clear readability in dark environments or inside cabinets. -
Efficient Power Management
Provides over 130 hours of battery life with a 10-minute auto-off feature to conserve energy. -
Comprehensive Adapter Set
Includes FC, SC, and LC adapters for direct connectivity to various connector types.
Applications
- Absolute optical power measurement
- Relative power loss testing
- Fiber network troubleshooting
- Maintenance of telecom and data center fiber infrastructures
Package Contents
- Fiber Optic Power Meter
- Nylon Carry Case
- Protective Cover
- FC Adapter
- SC Adapter
- LC Adapter
- (3) AA Batteries
- Cleaning Swabs
- Instruction Manual
Technical Specifications
| Specification | Value |
|---|---|
| Model | FPM-50A |
| Connector Types | FC, SC (APC/PC/UPC) & LC (PC/UPC) |
| Calibrated Wavelengths | 850, 980, 1300, 1310, 1490, 1550, 1625, 1650 nm |
| Detector Type | InGaAs |
| Measurement Range | -50 dBm to +26 dBm |
| Single Mode Accuracy | ≤ ± 0.25 dB |
| Multi Mode Accuracy | ≤ ± 0.8 dB |
| Resolution | 0.01 dB |
| Battery Type | 3 x AA |
| Dimensions | 7" x 3.25" x 1.5" |
| Weight | 0.5 lb |
Frequently Asked Questions
What is the measurement range of the FPM-50A?
The meter measures optical power from -50 dBm to +26 dBm.
Are the LC adapters compatible with all LC connectors?
The included LC adapter is intended for PC/UPC connectors only.
Can I calibrate this device myself?
Yes, the unit features a special function that allows for manual calibration.
Does the unit include batteries?
Yes, (3) AA batteries are included for operation.
How long will the device operate on battery power?
The device provides more than 130 hours of continuous operation.










