The Newport 840-C is a dual-microprocessor handheld optical power meter engineered for sensitive DC and AC peak-to-peak measurements across the 100 pW to 2 W range. The meter accepts Newport’s 818 Series detectors (Si, Ge, InGaAs) via in-line calibration modules, enabling rapid sensor interchange while preserving detector portability. A 4-digit backlit LCD displays results in watts, dBm, or dB units. The instrument combines laboratory-grade accuracy with field-portable convenience, making it suitable for telecommunications, photonics manufacturing, and research environments.
Technical Specifications
• Measurement modes: DC and AC peak-to-peak
• Power range: 100 pW to 2 W (-70 to +33 dBm)
• Display: 4-digit backlit LCD
• Readout units: Watts, dBm, dB
• Gain ranges: 6 decades (DC), 4 decades (AC peak-to-peak)
• Sampling rate: 2.5 Hz
• Wavelength range: 200–1800 nm in 1 nm steps (with compatible detectors)
• DC accuracy (100 nA range): ±(0.5% + 50 pA)
• DC accuracy (1 μA–5 mA range): ±(0.25% + offset)
• Peak-to-peak accuracy: Squarewave ±1–5% and Sinewave ±1–5% depending on frequency band (50 Hz–5 kHz)
• Analog output: Voltage proportional to detector current; 100 nA range accuracy ±(2.5% + 15 mV)
• Input voltage burden: 5 µV at zero, 10 µV max. at full range, 100 µV max. on 5 mA range
• Input noise: ±1 A-D count or better
• Input voltage drift: ±0.6 mV/°C; ±1 mV/month
• Source resistance: >30 kΩ
• Source capacitance: <14 nF
• Setting time: 2 seconds to within 1 digit (fast mode)
– Key Features
• Backlit LCD for operation in low-light environments
• Audio indicator for signal optimization without visual monitoring
• Rechargeable battery operation for field portability
• Fast measurement settling in 2 seconds
• User-friendly interface with frequently accessed controls positioned for accessibility
– Compatibility & Integration
The 840-C operates with Newport 818 Series Low-Power detectors (Si, Ge, InGaAs) equipped with in-line calibration modules (818-xx/CM). Newport 918D and 918L Series detectors are compatible with an 818P-DIN adapter. Detector-specific calibration data transfers automatically via the calibration module, allowing detectors to be used with other equipment independently.
