FNIRSI 2C53T 3-in-1 Portable Oscilloscope Multimeter Signal Generator

FNIRSI 2C53T 3-in-1 Portable Oscilloscope Multimeter Signal Generator

The FNIRSI 2C53T integrates a 250 MHz bandwidth oscilloscope with 250 MSa/s sampling rate, featuring an 8-bit ADC and a 16 kpoint memory buffer per channel (pre-/post-trigger). It also functions as a multimeter with up to 19999 counts and includes a 50 kHz signal generator. The input impedance is 1 MΩ ± 15 pF with AC/DC/GND coupling options. The device is housed in a durable ABS case with silicone overlays, equipped with a 2.8-inch 320x240 pixel color display, and powered by a 3000 mAh lithium-ion battery providing up to 4 hours of operation. Certified CAT II 300 V, it features dual ceramic fuses and an overvoltage protection circuit. Waveform recording and firmware updates ensure ongoing control and access to new features.

Color Display and Multimeter Functions

The 2.8" color display with 320x240 resolution presents waveforms with an "infinite afterglow" feature that preserves signal traces on screen after disappearance. It supports YT, Rolling, and XY modes (Lissajous figures) for phase difference analysis, with high brightness for clear visibility in various lighting conditions. The built-in multimeter offers measurements of DC/AC voltage and current, resistance, capacitance, diode testing, temperature (-55 °C to 1300 °C), and continuity with buzzer. Intelligent protection circuits safeguard both user and equipment from overload.

Advanced Hardware Architecture

The device employs a professional ARM + FPGA + high-performance ADC architecture, typical of desktop oscilloscopes, enabling fast triggering and precise signal reproduction. Trigger modes include Edge (rising/falling), Pulse Width, Video, and Slope, with up to 50 pre-trigger and 50 post-trigger samples to capture even brief anomalies accurately.

Signal Generator

The integrated function generator provides up to 400 V output voltage and frequencies from 1 Hz to 50 kHz. It offers 13 waveform types including sine, square, triangle, sawtooth, ramp, pulse, and noise, with adjustable offset and amplitude in 10 mV/div increments. This allows testing of filters, amplifiers, and analog circuits without additional equipment.

Automatic Measurement Setting

The AUTO function automatically adjusts range and triggering with a single button for immediate waveform display without manual configuration. Additional Single and Normal modes facilitate quick field measurements. Screenshots can be saved to internal memory or transferred to a computer via USB for archiving and analysis.

Isolated Measurement Channels

Two fully independent input channels (CH1 and CH2) each with 50 MHz bandwidth eliminate mutual interference, enhancing measurement accuracy. Sampling at 250 MSa/s ensures faithful reproduction of PWM pulses and power supply ripple.

Rugged Design

The housing is made of silicone-coated ABS plastic for shock and drop resistance. Gold-plated PCB tracks resist corrosion. The 3000 mAh battery supports up to 3 hours of continuous use. A fold-out stand allows adjustable positioning, while ergonomic buttons and a USB-C port provide comfortable operation and charging.

Included Accessories

• FNIRSI 2C53T 3-in-1 portable oscilloscope
• 10:1 measuring probe (1 pc.)
• Probe with alligator clips
• Multimeter leads
• Charging cable (USB-C)
• Carrying bag
• User manual

Product Specifications

• Screen: 2.8-inch HD color display
• Resolution: 320 x 240 pixels
• Charging: USB-C 5 V / 1 A
• Battery: 3000 mAh lithium-ion
• Functions: Oscilloscope, signal generator, multimeter
• Standby time: Up to 6 hours (laboratory maximum)
• Languages: Chinese and English
• Dimensions: 167 x 89 x 35 mm
• Weight: 300 g

Oscilloscope Parameters

• Channels: 2 independent channels
• Sampling rate: 250 MSa/s
• Analog bandwidth: 50 MHz per channel
• Memory depth: 1 kpoint
• Input impedance: 1 MΩ
• Time base range: 10 ns to 20 s
• Vertical sensitivity: 10 mV/div to 10 V/div
• Maximum input voltage: 400 V
• Trigger modes: AUTO, Normal, Single
• Display modes: Y-T, Rolling, X-Y
• Coupling: AC/DC
• Trace persistence: Off, 500 ms, 1 s
• Mathematical functions: 8 basic operations plus FFT
• Waveform capture and export: Supported
• Cursor measurement: Supported

Signal Generator Parameters

• Channels: Single channel
• Frequency range: 1 Hz to 50 kHz
• Amplitude range: 0.1 V to 3.0 V

Multimeter Parameters

• DC voltage ranges: 1.9999 V, 19.999 V, 199.99 V, 1000 V
• AC voltage ranges: 1.9999 V, 19.999 V, 199.99 V, 750 V
• DC current ranges: 19.999 mA, 199.99 mA, 1.9999 A, 9.999 A
• AC current ranges: 19.999 mA, 199.99 mA, 1.9999 A, 9.999 A
• Resistance ranges: 9.999 MΩ, 1.9999 MΩ, 199.99 kΩ, 19.999 kΩ
• Capacitance ranges: 9.999 mF, 99.99 mF
• Temperature measurement: -55 °C to 1300 °C
• Diode test: Supported
• Continuity test: Supported (buzzer)