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FNIRSI-138 Pro Digital Oscilloscope User Manual

Product Overview

The FNIRSI-138 Pro is a practical and cost-effective handheld digital oscilloscope designed for maintenance, R&D, and educational applications. It features a 2.5MS/s real-time sampling rate, 200KHz bandwidth, and measures voltages up to ±400V. The device includes an efficient one-key AUTO function for quick waveform display and a 2.4-inch high-definition LCD screen.

Key Features & Operation

Panel and Buttons: Includes BNC probe interface, reset switch, Type-C interface, power switch, and function button for various operations like automatic adjustment, calibration, and parameter settings.

Icon Indications: Understand various on-screen icons for PWM output, trigger modes, baseline, voltage sensitivity, time base, input coupling (AC/DC), and running/pause status.

Parameter Index: Key specifications include USB or lithium battery power, 5-6V supply voltage, 1000mAh battery capacity, 2.5MS/s sampling rate, 200KHz bandwidth, and voltage ranges up to ±400V (X10).

Firmware and Troubleshooting

Firmware Upgrade: Supports firmware updates via USB on WIN10 and later systems. Follow provided instructions carefully.

Common Problems: This section addresses typical user queries, including power-on issues, battery charging, waveform display, trigger stability, and signal measurement interpretation for AC/DC voltages and mains power.

Manufacturer Information

Manufacturer: Shenzhen FNIRSI Technology Co., Ltd.

For further information and support, please visit the official website: www.fnirsi.cn.

Models: FNIRSI-138 Pro, Digital Oscilloscope, FNIRSI-138 Pro Digital Oscilloscope

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