# Portable signal generator, with LCD, SG-003A, 0-10V, voltage simulator

> Portable signal generator FNIRSI SG-003A with 1.44 inch color TFT LCD screen (240x320 px), used for troubleshooting PLCs and industrial instrumentation. Generates and measures voltage and current signals, simulates 0-10V, 4-20mA and PWM (0-9999Hz), features RS485 interface for PC connection and 3.7V 3000mAh battery with USB-C charging. Dimensions: 92 x 72 x 30mm.

- Page: https://sigmanortec.ro/en/portable-signal-generator-with-lcd-sg-003a-0-10v-voltage-simulator
- Price: 508.36 RON
- Availability: In stock; 1-2 zile
- Reference: 7754003 · EAN: 5949295750472
- Category: Electronic components > Testing and Measurement > Signal Generators
- Package (shipping data): 0.492 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-11-05 02:37 (Europe/Bucharest)

## Description

Portable tool for quick troubleshooting in automation, PLCs and instrumentation, generates and measures voltage and current signals and can simulate 0-10V, 4-20mA and PWM. It has a 1.44 inch TFT LCD color screen for clear reading, conversion between signals with real-time monitoring, RS485 interface for connection to PC, 3000mAh battery with USB-C charging.
FNIRSI SG-003A portable digital signal generator, mainly used for industrial troubleshooting, such as PLCs and process instrumentation, is capable of generating and measuring voltage and current signals, can simulate sensor signals , control systems and PWM signals.
It is equipped with a 3000mAh battery and can be charged with a phone charger with a USB Type-C cable (the package includes a charger with a USB cable).
The generator has a 1.44 inch TFT LCD screen with a resolution of 240x320 pixels and the case integrates a soft silicone layer.
It has an RS485 interface for communication with the computer and can convert between input and output signals. For example, the input signal can be converted in the form of frequency into an output current signal, with a range between 0-1000Hz at 4-20mA.
Characteristics:
Input/Output Functions: Conventional, with automatic output options for voltage and current.
Output Modes: Possibility to choose single increase, single decrease and cyclic mode.
Input-Output Conversion: Includes active voltage to current conversion, passive mode and current to voltage conversion.
Custom Output Function: The upper and lower limits of the output can be set arbitrarily.
Input Diagram: Voltage and current, with a frame rate of 10 frames.
PWM output: Setting the frequency and the cyclic ratio.
Observation in Real Time: Voltage and current changes.
Power supply: High-capacity lithium battery 3.7V 3000mAh, charging through the Type-C interface.
Screen: high-definition TFT color LCD, 240*320 resolution, low energy consumption.
Specifications:
Active Output Current: 0~24mA, resolution 0.01 mA, maximum load 750Ω, accuracy ±(0.1%+0.005)
Passive Output Current: 0-24 mA, resolution 0.01 mA, external power supply up to 30V, accuracy ±(0.1%+0.005)
Output Voltage: 0-24 V, resolution 0.01v, maximum current 30mA, accuracy ±(0.1%+0.005)
Output voltage 24V: command current 24mA. resolution 0.01 mA, accuracy ±(0.1%+0.005)
Input Current Measurement: 0-24 mA, resolution 0.01 mA, input impedance 100Ω, accuracy ±(0.1%+0.05)
Input Voltage Measurement: 0-30 V, resolution 0.01 V, input impedance 2MΩ, accuracy ±(0.1%+0.05)
PWM: 0-9999Hz
Battery: 3.7V 3000mAh; estimated usage time 26 hours
Operating Environment: 0 °C - 50 °C.
Protection: Reverse and over current, protection voltage 30V
Dimensions mm: 92 x 72 x 30mm