YS-4470 True RMS Digital Multimeter for Inverters & Drives
YS-4470 True RMS Digital Multimeter for Inverters & Drives
YS-4470 True RMS Digital Multimeter Kit
The YS-4470 Professional Multimeter is engineered for modern power electronics, delivering accurate True RMS measurements on non-sinusoidal waveforms — making it the go-to instrument for technicians working with VFDs, solar inverters, variable speed drives, and other complex electronic systems. With a precision-built ABS housing, backlit display, and safety-rated test leads, this multimeter is built for both field diagnostics and laboratory environments.
Key Features
- True RMS Accuracy: Captures accurate readings on non-sinusoidal waveforms, essential for modern power electronics including inverters, drives, and variable frequency drives (VFDs).
- Built-In Ammeter Function: Measure direct current up to 10A (fuse-protected) without an external shunt — ideal for high-load testing scenarios.
- High Accuracy Ratings: ±0.5% for DC voltage and ±1% for AC voltage, ensuring consistent, repeatable results across a wide range of applications.
- 90° Bent Probe Test Leads: Included extra-tip test leads feature 90° bent probes and double insulation, enhancing safety and usability in confined or hard-to-reach spaces.
- Backlit Display: Easy-to-read backlit screen for use in low-light environments.
- Auto Power-Off: Automatically powers down after 10 minutes of inactivity to conserve battery life.
- ABS Construction: Durable, impact-resistant body designed for demanding professional use.
Specifications
- Model: YS-4470
- Material: ABS
- Color: Black
- True RMS Capability: Yes
- Current Range (Ammeter): 10A (with fuse protection)
- DC Voltage Accuracy: ±0.5%
- AC Voltage Accuracy: ±1%
- Backlit Display: Yes
- Auto Power-Off: Yes (10 minutes)
- Battery Included: No
- Wireless: No
- Country of Origin: Made in Mainland China
Package Contents
- 1 × YS-4470 Multimeter
- 1 × Set of Probe Test Leads
Note: Actual product color may vary slightly from images due to monitor settings and lighting conditions. Please allow for minor manual measurement deviations.
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Frequently Asked Questions
Q: What does True RMS mean and why does it matter for the YS-4470 Multimeter?
A: True RMS (Root Mean Square) measurement means the multimeter accurately calculates the real power value of non-sinusoidal AC waveforms — the type commonly produced by inverters, VFDs, and variable speed drives. Standard multimeters may give inaccurate readings on such waveforms, while the YS-4470 delivers precise results every time, making it essential for modern power electronics diagnostics.
Q: Does the YS-4470 Multimeter require an external shunt for current measurement?
A: No. The YS-4470 features a built-in ammeter function that allows direct current measurement up to 10A (fuse-protected), eliminating the need for an external shunt and simplifying high-load testing setups.
Q: Is a battery included with the YS-4470 Multimeter Kit?
A: No, a battery is not included with the kit. Please ensure you have a compatible battery on hand before use. The multimeter does feature an auto power-off function (10 minutes) to help extend battery life once installed.
Q: Are the test leads safe for use in tight or confined spaces?
A: Yes. The included test leads feature 90° bent probes and double insulation, specifically designed to improve safety and maneuverability in confined spaces, reducing operational time and risk during complex measurements.