PWM Signal Generator 0-20mA 4-20mA 0-10V Colour Screen | Gaqqee
PWM Signal Generator 0-20mA 4-20mA 0-10V Colour Screen | Gaqqee
Gaqqee PWM Pulse Signal Generator – Multifunctional Colour Screen Signal Source
The Gaqqee PWM Pulse Signal Generator is a professional-grade, multifunctional signal source designed for industrial control DC analogue signal debugging, electrical equipment installation and maintenance, and PWM motor speed regulation. Featuring a bright 2-inch TFT colour screen (320×240 pixels), triple power supply options, and wide output ranges (0–20mA, 4–20mA, 0–10V, 0–5V, and PWM square wave), this compact instrument is an essential tool for engineers and technicians in the field or on the bench.
Made in Mainland China.
Key Features
- Triple Power Supply Flexibility: Operate via external DC 24V terminal, USB-C (5V), or the optional built-in 3.7V 1500mAh lithium battery — adapt seamlessly to any work environment, from workshop bench to field installation.
- Wide Output Range: Voltage output ±12V (max 20mA under load, short-circuit protected); current output 0–24mA (max sampling resistance 500Ω); freely configurable output presets including 0–20mA, 4–20mA, 0–10V, and 0–5V with user-configurable engineering display values.
- High-Frequency PWM Square Wave Output: Frequency adjustable from 1 Hz to 150 kHz, duty cycle adjustable 0–100%, with a fixed 5V high level and drive current under 20mA. Short-circuit protected for safe operation.
- Precision Voltage & Current Measurement: Measure voltage up to ±50V and current up to ±50mA, making it a versatile diagnostic and calibration tool.
- 2-Inch TFT Colour Display: Clear 320×240 pixel screen with switchable Chinese/English interface for easy reading in any language preference.
- EC11 Digital Encoder Knob: 20-step-per-revolution large knob with electroplated keycaps delivers precise, tactile adjustment — no guessing, just confident control.
- Intelligent Charging Indicator: LED indicator turns red during charging and green when fully charged. On-screen battery icon provides live charging status at a glance.
- CE & RoHS Certified: Meets international safety and environmental compliance standards.
Full Specifications
| Display | 2-inch TFT colour screen (320×240 pixels) |
| Interface Language | Switchable Chinese / English |
| Power Supply Options | DC 24V terminal / USB-C 5V / Built-in 3.7V 1500mAh Li-battery (battery model) |
| Voltage Output Range | ±12V (max 20mA load, short-circuit protected) |
| Voltage Measurement Range | ±50V |
| Current Output Range | 0–24mA (max 500Ω sampling resistance, short-circuit capable) |
| Current Measurement Range | ±50mA |
| Output Presets | 0–20mA / 4–20mA / 0–10V / 0–5V (user-configurable) |
| PWM Output | 1–150 kHz frequency, 0–100% duty cycle, 5V high level, <20mA drive current |
| Knob | EC11 digital encoder, 20 steps/rev, with push button |
| Terminal Plug | 15EDGK3.81 (9-pin) |
| Operating Environment | 0–40°C, relative humidity <80% |
| Charging Time (battery model) | Approx. 6+ hours; provides 1–5 hours runtime depending on output load |
| Certification | CE, RoHS |
| Country of Origin | Mainland China |
What's in the Box
- Signal Generator Main Unit × 1
- Flathead Screwdriver × 1
- USB-C Charging Cable × 1
- Alligator Clip Test Leads × 4 (20AWG / 0.5mm²)
Usage Notes
- Always switch off power before connecting cables.
- Operating beyond specified technical parameters may cause malfunction or damage.
- The PWM 5V output is not suitable for direct use in 12V or 24V systems, as 5V is recognised as a low level in those systems.
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Frequently Asked Questions
Q: How do I switch between PWM frequency and duty cycle adjustment on the signal generator?
A: Press the button to enter PWM adjustment mode. Then press the EC11 encoder knob once to toggle between frequency adjustment (1–150,000 Hz) and duty cycle adjustment (0–100%). The corresponding unit character (Hz or %) will be displayed beneath the PWM indicator on the colour screen.
Q: How do I access the help or settings menu?
A: Press and hold the lower button for 2 seconds to enter the main menu. Press the lower button once to toggle between the Help and Settings screens, then press the knob to enter the selected interface.
Q: Can I use the PWM signal generator with 12V or 24V motor control systems?
A: The PWM square wave output has a fixed high level of 5V and a drive current under 20mA. This is not compatible with 12V or 24V systems, where 5V is treated as a logic LOW. For analogue voltage and current outputs (0–10V, 0–20mA, 4–20mA), please check your system's input specifications before use.
Q: What output signal types does this PWM signal generator support?
A: The generator supports voltage output (±12V, freely configurable to 0–5V, 0–10V, etc.), current output (0–24mA, configurable for 0–20mA or 4–20mA loops), and PWM square wave output (1–150 kHz, 0–100% duty cycle). Engineering display values are fully user-configurable.
Q: How long does the battery last on a full charge?
A: On a fully charged built-in 3.7V 1500mAh lithium battery, the generator provides approximately 1–5 hours of operation, depending on the output load. A full charge typically takes over 6 hours via the USB-C charging port.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.