HK78E – 20,000 Counts TRMS Manual Range Digital Multimeter
Product Description
The HK78E is a professional-grade TRMS manual range digital multimeter designed for both electrical professionals and dedicated DIY enthusiasts. With a high 20,000-count display, it offers enhanced measurement precision for a wide variety of electrical tasks. Its robust design and versatile functions, including true RMS, make it suitable for accurate and reliable measurements in both commercial and residential settings. This model is a core part of the HK78 series, known for providing dependable performance and a comprehensive set of measurement capabilities.
Key Highlights
20,000 counts TRMS for high precision and accuracy.
Manual range selection for more controlled and specific measurements.
Comprehensive functions: AC/DC voltage/current, resistance, capacitance, frequency, and conductivity.
Dedicated live wire detection and NCV (Non-Contact Voltage) for enhanced safety.
Built-in diode test and continuity buzzer.
Dual backlight for clear readings in various lighting conditions.
High-level safety: CAT III 1000V rated.
Specifications
| Function | Range | Accuracy |
| DC Voltage | 200mV–1000V | ±(0.05% + 5d) – ±(0.5% + 5d) |
| AC Voltage | 200mV–750V | ±(0.5% + 10d) – ±(0.8% + 5d) |
| DC Current | 200µA–20A | ±(0.5% + 5d) – ±(1.0% + 5d) |
| AC Current | 200µA–20A | ±(1.0% + 10d) – ±(1.5% + 10d) |
| Resistance | 200Ω–20MΩ | ±(0.2% + 5d) – ±(2.0% + 10d) |
| Capacitance | 100nF–100uF | ±(2.0% + 15d) – ±(10.0% + 5d) |
| Frequency | 100Hz–10MHz | ±(0.1% + 2d) |
| Conductivity | 10M/100M/1000MΩ | ±(1.0% + 10d) |
| Display Count | 19999 | — |
General Features
Power: 1.5V(AA) × 2
Dimensions: 185 × 88 × 54 mm
Weight: 350g
Safety: CAT III 1000V
Special Functions: True RMS, Diode Test, Continuity Buzzer, Flashlight, NCV, Live Wire, Data Hold, Relative Mode, Auto Power Off, and Dual Backlight.
Applications
General electrical maintenance and repair.
Electronics testing and troubleshooting.
HVAC system diagnostics.
Automotive electrical work.
Educational and training environments.






