The EXFO EPM-502 is a handheld optical power meter engineered for precise measurements across the 800 nm to 1650 nm wavelength range. Built with a germanium detector and calibrated at six industry-standard wavelengths (850 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm, 1625 nm), it delivers power uncertainty of ±0.06 dB for levels ≥ -40 dBm and ±5% ± 0.1 nW for levels > -50 dBm. The meter supports automatic wavelength recognition, configurable pass/fail thresholds with LED indicators, and tone detection at 270 Hz, 1 kHz, and 2 kHz for network fault isolation.
## Technical Specifications
• **Wavelength Range:** 800 nm to 1650 nm
• **Calibrated Wavelengths:** 850 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm, 1625 nm
• **Detector Type:** Germanium (Ge)
• **Power Range:** −70 dBm to +10 dBm
• **Power Uncertainty:** ≤0.06 dB (≥ −40 dBm); ±5% ± 0.1 nW (> −50 dBm)
• **Measurement Units:** dB, dBm, Watt
• **Display:** LCD with backlight
• **Data Storage:** Up to 1000 data items
• **Battery Life:** Up to 70 hours (typical)
• **Power Source:** Rechargeable battery with AC adapter (indoor use only)
## Key Features
• Automatic wavelength recognition eliminates manual selection
• Interchangeable SC and ST optical connectors
• Tone detection (270 Hz, 1 kHz, 2 kHz) for signal tracing
• USB data transfer to PC for logging and analysis
• Reference value setting and offset nulling capabilities
• Class 1M laser product (standard); Class 3R when equipped with Visual Fault Locator option
• Configurable pass/fail thresholds with visual status indicators
## Typical Applications
Fiber installation and maintenance, optical link characterization, power budget validation, and field network diagnostics across long-haul, metro, and access wavelengths.
## Compatibility & Integration
Works with EXFO ELS-500, EOT-500, and ELS-50 light sources. Compatible with EXFO ELS-500 in Auto-Switching mode for semi-automated loss measurement workflows.
