1. Introduzione
The FNIRSI 2C53T is a versatile 3-in-1 handheld device designed for electronic testing and measurement. It integrates the functionalities of a digital oscilloscope, a true RMS multimeter, and a signal generator into a single, portable unit. This manual provides detailed instructions for the safe and effective use of your device.

Figura 1.1: The FNIRSI 2C53T handheld device, showcasing its compact design and integrated display.
2. Produttu Finituview
The FNIRSI 2C53T combines three essential tools for electrical and electronic work:
- Digital Oscilloscope: 2 channels, 50MHz bandwidth, 250MS/s real-time samplu rate.
- True RMS Multimeter: 4.5 digits, 19999 counts, capable of measuring voltage, current, resistance, capacitance, diode, continuity, and temperature.
- Generatore di signali: Outputs 13 types of waveforms with adjustable frequency (0-50KHz), amplitude (0-3V), and duty cycle (0-100%).
The device features a robust hardware architecture (ARM + FPGA + ADC) for enhanced performance and flexibility. It also includes a 2.8-inch wide-angle display for clear readability.

Figura 2.1: Fronte view of the FNIRSI 2C53T, showing the display, control buttons, and input terminals.
Cumpunenti inclusi:
- FNIRSI 2C53T Main Unit
- P6100 High Voltage Probe (x2)
- Alligator Clip (x1)
- Test Probe (x1)
- Cavu di carica Type-C (x1)
- Saccu di almacenamentu (x1)
- Manuale di istruzioni (x1)
- Packing Box (x1)
3. Setup
3.1 Caricà u dispusitivu
The 2C53T has a built-in rechargeable lithium polymer battery. Before first use, fully charge the device using the provided Type-C charging cable and a compatible USB power adapter (not included). The charging port is located on the side of the device.
- Connect the Type-C cable to the device's charging port.
- Cunnette l'altra estremità di u cable à una fonte di energia USB.
- L'indicatore di batteria nant'à u screnu mostrerà u statu di carica.
- Una carica cumpleta furnisce circa 6 ore di standby.
3.2 Accensione / spegnimentu
Press and hold the power button (usually marked with a power symbol) to turn the device on or off.
3.3 Connecting Probes
Depending on the function you intend to use (oscilloscope or multimeter), connect the appropriate probes to the designated input terminals on the device. Ensure connections are secure.

Figura 3.1: Illustrations of the Type-C charging port, internal battery, and the integrated stand for convenient placement.
4. Operating Instructions
The FNIRSI 2C53T offers three primary operating modes: Oscilloscope, Multimeter, and Signal Generator. Please note that these three functions cannot be used simultaneously.
4.1 Funzione di l'osciloscopiu
The oscilloscope mode allows for the visualization and analysis of electrical signals.
- Canali: The device features 2 input channels.
- larghezza di banda: 50 MHz.
- Sample Tarif: 250MS/s real-time.
- Modi di trigger: Select from Auto, Normal, or Single trigger modes to stabilize waveforms.
- Sensibilità verticale: Adjustable from 200mv/div to 10v/div.
- Vol. Massimu Inputtage: 400V.
- Modi di Visualizazione: Choose between Y-T (standard time-domain display), Roll (for slow-changing signals), and X-Y (for Lissajous figures).
- Funzioni avanzate: Includes mathematical operations, cursor measurement, FFT spectrum analysis, and persistence display for detailed waveform analysis.

Figura 4.1: Examples of oscilloscope display features, including mathematical operations, cursor measurements, persistence display, and X-Y mode for Lissajous figures.
4.2 Funzione di u multimetru
The multimeter mode provides precise digital measurements of various electrical parameters.
- Display: 4.5 digits with 19999 counts.
- True RMS: Fornisce letture precise per forme d'onda non sinusoidali.
- Capacità di misurazione: DC/AC Voltage, DC/AC Current, Resistance, Capacitance, Diode, Continuity Check, and Temperature.
- Maximum Measurements: AC 750V, DC 1000V.
- Auto-ranging: Automatically selects the appropriate measurement range; simply press the AUTO button.

Figura 4.2: The multimeter interface displaying various measurement options such as voltage, current, resistance, and capacitance.
4.3 Signal Generator Function
The signal generator mode allows you to output various waveforms for testing circuits.
- Waveform Types: Outputs 13 types of parameter-variable waveforms, including Sine, Square, Pulse, Ramp, Noise, and DC.
- Frequenza di output: Adjustable from 0 to 50KHz.
- Output Amplattitudine: Adjustable from 0 to 3V.
- Output Duty Cycle: Adjustable from 0% to 100%.

Figura 4.3: The signal generator interface showing examples of different output waveforms such as sine, square, and pulse waves.
5. Mantenimentu
Proper maintenance ensures the longevity and accuracy of your FNIRSI 2C53T.
- Pulizia: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents. Ensure no liquids enter the device.
- Cura di a batteria: Per prulungà a durata di a batteria, evitate di scaricà cumpletamente u dispusitivu spessu. Sè vo u almacenate per periodi prolungati, caricate a batteria à circa u 50% è ricaricatela ogni pochi mesi.
- Conservazione: Store the device in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. Use the provided storage bag to protect it from dust and physical damage.
- Cura di a sonda: Inspect probes and cables regularly for any signs of wear or damage. Replace damaged components immediately to ensure safety and accurate measurements.

Figura 5.1: Un esplosu view illustrating the internal components and the durable ABS+silicon construction of the FNIRSI 2C53T, designed for stable performance and protection.
6. Risoluzione di prublemi
If you encounter issues with your FNIRSI 2C53T, refer to the following common troubleshooting steps:
- U dispositivu ùn si accende micca: Assicuratevi chì a batteria sia sufficientemente carica. Cunnette u dispusitivu à una fonte d'alimentazione cù u cavu Type-C è pruvate torna.
- Letture incorrette: Verify that probes are correctly connected and not damaged. Ensure the correct measurement mode is selected for the task. Check probe compensation for oscilloscope measurements.
- Forma d'onda instabile: Adjust the trigger settings (level, mode) in oscilloscope mode. Ensure the input signal is within the device's specifications.
- Functions Not Working Simultaneously: Remember that the oscilloscope, multimeter, and signal generator functions cannot be used at the same time. Switch between modes as needed.
- Prublemi di cunnessione à u PC: Ensure the Type-C cable is properly connected. Check your computer's device manager to see if the device is recognized.
For persistent issues or problems not covered here, please contact customer support.
7. Specificazioni
| Feature | Specificazione |
|---|---|
| U fabricatore | FNIRSI |
| Numero di mudellu | 2C53T |
| Pesu di l'articulu | 300 g |
| Dimensioni di u produttu (L x W x H) | 8.9 x 3.5 x 16.7 cm |
| Tipu di batterie | 1 Batteria Lithium Polymer (inclusa) |
| Precisione di misurazione | +/-5% |
| Larghezza di banda di l'oscilloscopiu | 50 MHz |
| Oscilloscope Sample Rate | 250 MS/s |
| Conteggi di multimetri | 19999 |
| Signal Generator Frequency Range | 0-50KHz |
| Data Prima Disponibile | 2024/11/28 |
8. Garanzia è Support
FNIRSI Technology Co., Ltd. is committed to providing high-quality measuring instruments. For any inquiries, technical assistance, or warranty claims, please contact our support team.
- E-mail di Supportu Clienti: support@fnirsi.com
- Risorse in linea: A PDF user manual may be available for download on the product's detail page or the official FNIRSI websitu.
- Negoziu di marca: Visit the official FNIRSI store for more products and information: FNIRSI Amazon Store





