GEARWRENCH Digital Multimeter GWDM015 4000 Count True RMS (1000V AC DC 20A Current 40MOhm Resistance Auto Ranging Electrical Diagnostic Tester)
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GEARWRENCH GWDM015 1000V 20A True RMS Auto-Ranging Digital Multimeter
The GEARWRENCH GWDM015 True RMS Digital Multimeter measures AC/DC voltage up to 1000V and current up to 20A to troubleshoot complex electrical circuits, automotive electronics, and heavy machinery controls. Engineered with True RMS precision and a 4,000-count backlit LCD screen, this diagnostic meter tests resistance up to 40MΩ along with capacitance, frequency, duty cycle, continuity, and diode parameters in non-linear, fluctuating environments. Built with integrated non-contact AC voltage detection, full overload protection, and CAT safety ratings within an impact-resistant housing featuring an integrated kickstand, it equips commercial electricians, industrial maintenance technicians, and automotive specialists with reliable field diagnostics.
Best Used For:
- Automotive & Hybrid Circuit Diagnostics: Measuring high-current 20A parasitic draws, sensor duty cycles, and high-voltage DC circuitry across hybrid and conventional vehicle systems.
- Industrial Machinery & VFD Maintenance: Measuring true effective voltage up to 1000V AC on variable frequency motor drives and non-linear power distribution lines using True RMS filtering.
- Commercial Facility Electrical Service: Performing non-contact live conductor sweeps, trace continuity checks, and motor start capacitor testing inside electrical service panels.
Key Performance & Safety Features
- True RMS Measurement Technology: Provides accurate readings on noisy, distorted waveforms commonly found in variable speed motor drives and electronic ballasts.
- Expanded Voltage & Current Range: Measures up to 1000V AC/DC and 20A AC/DC for heavy industrial and high-output automotive electrical testing.
- Integrated Non-Contact Voltage (NCV): Detects energized AC lines quickly without physical probe contact to enhance operator safety.
- Backlit 4000-Count LCD Display: High-contrast illuminated screen ensures crisp numeric visibility inside dark engine bays and unlit service panels.
- Diagnostic Capture Functions: Features relative value mode, Min/Max capture, data hold, and automatic power-off to preserve battery life.
- Rugged Protective Holster: Features an integrated fold-out kickstand and built-in test lead storage clips for stable, hands-free field use.
What's Included
- (1) GEARWRENCH True RMS Digital Multimeter (GWDM015)
- (1) Pair of CAT III / CAT IV 42.5" Safety Test Leads
- (1) Specialized Capacitance Adapter
- (1) Heavy-Duty Zippered Protective Storage Case
- (1) 9V Alkaline Battery (Pre-Installed)
- (1) Detailed User Operation Manual
Technical Specifications
| Specification | Detail |
|---|---|
| Manufacturer Brand | GEARWRENCH |
| Model Number / MPN | GWDM015 |
| Voltage Measurement Range | Up to 1,000V AC / 1,000V DC |
| Current Measurement Range | Up to 20.0A AC / 20.0A DC |
| Resistance Measurement Range | Up to 40.0 MΩ (Megaohms) |
| Display Resolution & Digits | 4,000-Count Digital LCD with Backlight |
| Measurement Architecture | True RMS (Root Mean Square) Auto-Ranging |
| Auxiliary Testing Functions | Capacitance, Frequency, Duty Cycle, Diode Test, Continuity Beeper |
| Safety Category Ratings | CAT III / CAT IV Industrial Protection with Overload Circuitry |
| Test Lead Wire Length | 42.5 in (1,079.5 mm) |
| Power Supply Type | 9V Alkaline Battery (Included) |
| Physical Dimensions (L x W x H) | 7.25 in x 3.50 in x 2.25 in (184.2 mm x 88.9 mm x 57.2 mm) |
| Total Instrument Weight | 1.70 lbs (0.77 kg) |
| Manufacturer Warranty | 2-Year Limited Warranty |
Pro-Tip: When diagnosing automotive parasitic battery drains, connect the multimeter in series on the 20A DC current input jack; utilizing the Min/Max capture mode tracks intermittent control module wakeups without having to stare at the screen continuously.