FNIRSI SG-004A Multi-functional Signal Generator

📟 Display & Physical

• Display: 2.4″ TFT full-color screen (320 × 240 resolution)

• Dimensions: 112 × 82 × 28 mm

• Weight: ~167 g

• Battery: Built-in 3000mAh rechargeable lithium battery

• Charging Port: USB-C (5V–12V input, max 10W)

• Battery Life: Up to 24 hours standby, ~20 hours active use

  🔌 Output Functions

  Signal Type	Range	Resolution	Accuracy
  Current	0–24 mA (active/passive)	0.001 mA	±(0.02% + 0.003)
  Voltage	0–24 V	0.001 V	±(0.02% + 0.003)
  Resistance Simulation	0–390 Ω (PT100, Cu50)	0.1 Ω	±(0.2% + 1)
  Frequency / PWM	0–9999 Hz	0.01 Hz	±2%
  Millivolt Output	-10 to 100 mV	0.001 mV	±(0.03% + 0.003)
  Thermocouple Simulation	Multiple types (see below)	—	Type-dependent
  Loop Power Output	24V for 4–20mA loops	—	—

  📥 Input Functions

  Signal Type	Range	Resolution	Accuracy
  Current	0–24 mA	0.001 mA	±(0.02% + 0.003)
  Voltage	0–24 V	0.001 V	±(0.02% + 0.003)
  Frequency / PWM	0–9999 Hz	0.01 Hz	±2%
  Millivolt Input	-10 to 100 mV	0.001 mV	±(0.03% + 0.003)
  Resistance Measurement	0–400 Ω	0.1 Ω	±(0.2% + 1)

  🌡️ Thermocouple Support

  Type	Range (°C)	Accuracy
  K	-200~1372	±0.5% + 1°C
  J	-200~1200	±0.5% + 1°C
  T	-200~400	±0.5% + 1°C
  E	-200~1000	±0.5% + 1°C
  R	0~1768	±0.5% + 1°C
  S	0~1768	±0.5% + 1°C
  B	200~1820	±0.5% + 1°C
  N	-200~1300	±0.5% + 1°C
  WRe3/25, WRe5/26	0~2316	±0.5% + 1°C

  🔧 Functional Features

  • Signal Source Simulation: Current, voltage, frequency, resistance, thermocouples, PWM

  • Measurement Capabilities: Current, voltage, frequency, thermocouples, resistance

  • Signal Conversion: Input-to-output transformation (e.g., 0–10 V input → 4–20 mA output)

  • 24V Loop Power Supply: For powering transmitters and sensors

  • Modbus RS485 Slave Communication: Industrial integration for remote control and data

  • Auto Output Programs: Sweep, ramp up/down, step functions

  • Real-Time Curves: Graphical display of input/output signal trends

  • Preset Memory: Quick-access saved configurations

  • Firmware Upgradeable: Via USB (U-disk mode, Windows 10 only)

  • Multilingual Interface: English, Chinese