FNIRSI SG-003A Signal Generator

The FNIRSI SG-003A is a compact and versatile industrial signal generator and calibrator designed for testing, simulating, and debugging analog signals in control systems. It can generate and measure voltage, current, and frequency signals, making it a powerful tool for PLC testing, process instrumentation calibration, and industrial automation diagnostics.

Featuring a 2.4″ TFT color display, real time signal curve visualization, and programmable signal output modes, the SG-003A allows users to simulate various signals such as 0-24V, 0-24mA, and PWM frequency signals with high precision. Its built in 3000mAh rechargeable battery and compact handheld design make it ideal for both field work and laboratory environments.

Highlights:

• Multi function signal generator and calibrator.
  
• Generates voltage, current, and PWM signals.
  
• Supports 0-24V and 0-24mA output simulation.
  
• Real time signal curve display for monitoring changes.
  
• Signal conversion and scaling functions.
  
• 4 preset signal groups for quick testing.
  
• Automatic ramp output modes (rise, fall, cycle).
  
• 2.4″ TFT color LCD for clear visualization.
  
• Rechargeable 3000mAh battery with USB C charging.
  
• RS485 communication support for PLC and industrial systems. 

Specifications:

General

• Model: FNIRSI SG-003A.
  
• Display: 2.4″ TFT color LCD (240×320).
  
• Battery: 3.7V 3000mAh rechargeable lithium battery.
  
• Charging: USB C (5V).
  
• Standby Time: Up to ~26 hours.
  
• Operating Time: ~8-10 hours typical use.
  
• Dimensions: ~82×27×112mm.
  
• Weight: ~450g.

Signal Output

• Voltage Output Range: 0-24V.
  
• Current Output Range: 0-24mA (active/passive).
  
• Frequency / PWM Output: 0-9999Hz.
  
• Resolution: 0.01V / 0.01mA.
  
• Output Accuracy: ±(0.1% + 0.005).
• Max Load: 750Ω.

Signal Input

• Voltage Input Range: 0-30V.
  
• Current Input Range: 0-24mA.
  
• Resolution: 0.01mA.
• Input Accuracy: ±(0.1% + 0.005).

Additional Functions

• Real time signal curve monitoring.
  
• Signal linear conversion.
  
• Programmable automatic output.
  
• Preset signal output groups.
  
• Modbus slave communication support.
  
• USB firmware upgrade support.

Ideal For:

• 🏭 Industrial automation system testing.
  
• ⚙️ PLC and control panel debugging.
  
• 🔧 4-20mA loop calibration and troubleshooting.
  
• 📡 Sensor and transmitter simulation.
  
• 🧰 Process instrumentation maintenance.
  
• 🎓 Automation engineering training and labs.