FNIRSI-2C53T is a versatile and highly practical three-in-one dual-channel digital oscilloscope launched by FNIRSI, designed for professionals in the maintenance and research industries. This device combines the functionalities of an oscilloscope, a multimeter, and a signal generator. The oscilloscope uses FPGA + ARM + ADC hardware architecture, featuring a 250MS/s sampling rate, a 50MHz analog bandwidth, and an integrated high-voltage protection module that supports peak voltage measurements up to ±400V. It also supports waveform screenshot saving and viewing for secondary analysis.

The multimeter function offers 4.5 digits with 19999 counts true RMS, supporting AC/DC voltage and current measurements, as well as capacitance, resistance, diode, and continuity measurements, making it an ideal multifunctional instrument for professionals, factories, schools, enthusiasts, or home use.

The built-in DDS function signal generator can output 13 types of function signals, with a maximum output frequency of 50KHz and a step size of 1Hz. The output frequency, amplitude, and duty cycle are adjustable. It features a 2.8-inch 320*240 resolution high-definition LCD screen and a built-in 3000mAh rechargeable lithium battery with a standby time of up to 6 hours. Its compact size provides users with more powerful practical functions and excellent portability.

• Newly Version: The 2C53T is an upgraded version of the 2C23T, which improves the measuring range and adds math operation，cursor measurement，persistence mode，XY mode features.
• 2 Channel Oscilloscope: 50 MHz bandwidth, 250MSa/s sampling rate, 1Kpts record depth, automatic measurement function, max voltage 400V, vertical sensitivity 10mV/div-10V/div , support waveform image storage and export.
• 4.5-Digit 20000 Counts Multimeter: AC Voltage: 0-750V, DC Voltage: 0-999.9V, DC/AC Current: 0-9.999A, Resistance: 0-19.99MΩ, Capacitance: 0-99.99mF, Continuity Measurement. Multi-function meter for professionals, schools and hobbyists.
• Signal Generator: The maximum waveform output frequency can reach 50kHz and a step of 1Hz, and can output 13 waveforms.
• Save function: one-click save, screening function. You can upload the saved image by connecting to PC via Type-C. You can easily compare the waveforms by displaying the reference waveform and the measured waveform on the same screen.
• Excellent Design: The Oscilloscope adopts FPGA + MCU + ADC hardware architecture, built-in high-voltage protection module, adopts 2.8 inch LCD display, built-in 3000mAh Li-ion battery, standby time up to 6H, Type-C interface supports 5V/1A charging.

Basic Parameters:

• Model : 2C53T
• Display Screen : 2.8 inch HD color screen
• Resolution ratio : 320*240
• Charging Specifications : TYPE-C (5V/1A)
• Battery : 3000mAh lithium battery
• Support Functions : Oscilloscope, Signal generator, Multimeter (view functional parameters for details)
• Standby Time : 6h (laboratory theoretical maximum)
• Language : Chinese and English
• Product Volume : 167*89*35mm
• Weight : 300g 

Oscilloscope Parameters:

• Channel : Dual channel
• Sample Rate : 250MS/s
• Analog Bandwidth : 50M(dual channel independent 50M)
• Storage Depth : 1Kpts
• Impedance : 1MΩ
• Time Base Range : 10ns-20s
• Vertical Sensitivity : 10mV/div-10V/div (x1)
• Maximum Measured Voltage : ±400V
• Trigger Mode : AUTO/Normal/Single
• Trigger Type : Rising edge, Falling edge
• Display Mode : Y-T/Rolling/X-Y
• Coupling Method : AC/DC
• Persistence : OFF, 500ms, 1s, ∞
• Math : 8 Basic Operations + FFT
• Waveform Screenshot Save : Supported
• Export Waveform Image : Supported
• Cursor Measurement : Supported
• Infinite Afterglow : Supported 

Function Signal Generator Parameters:

• 13 Signal Waveforms : Output waveform: sine wave, rectangular wave, sawtooth wave, half wave, full wave,
• positive step wave, reverse step wave, exponential rise, exponential fall, DC, multi-audio, Sinker pulse, Lorentz wave
• Output Frequency : 0-50KHZ
• Output Amplitude : 0-3V
• Output Duty Cycle : 0-100% 

Multimeter Parameters:

• DC Voltage : 1.9999V / 19.999V / 199.99V / 1000V
• AC Voltage : 1.9999V / 19.999V / 199.99V / 750.0V
• DC Current : 19.999mA / 199.99mA / 1.9999A / 9.999A
• AC Current : 19.999mA / 199.99mA / 1.9999A / 9.999A
• Resistance : 19.999MΩ / 1.9999MΩ / 199.99KΩ / 19.999KΩ 1.9999KΩ / 199.99Ω
• Capacitance : 999.9uF / 99.99uF / 9.999uF / 999.9nF / 99.99nF / 9.999nF / 9.999mF / 99.99mF
• Temperature : (-55~1300℃) / (-67~2372℉)
• Diode : YES
• Continuity Test : YES

1. User Manaul - FNIRSI DSO2C253T DUAL CH 50MHZ