The HK689E True RMS AC/DC clamp meter measures AC and DC current up to 1000A and AC/DC voltage up to 1000V. With 60A, 600A and 1000A current ranges, it supports troubleshooting and maintenance across AC distribution circuits, DC power systems and motor-driven equipment.
For circuits containing both AC and DC components, the HK689E adds combined AC+DC voltage measurement up to 600V and combined AC+DC current measurement up to 1000A. These functions expand its use in power conversion and mixed-signal electrical applications.
VFD mode, inrush current testing, LoZ measurement and peak hold provide additional diagnostic options. Resistance, capacitance, frequency, temperature and DC microamp measurement bring multiple maintenance tasks into one instrument, with a backlit display and flashlight for improved visibility.
Key Features
- 1000A AC/DC current measurement: Measures both AC and DC current across 60A, 600A and 1000A ranges.
- Combined AC+DC measurement: Tests mixed AC/DC voltage up to 600V and mixed AC/DC current up to 1000A.
- True RMS measurement: Supports AC measurements on non-sinusoidal waveforms.
- 1000V AC/DC voltage testing: Covers a broad range of electrical maintenance tasks.
- Motor and drive diagnostics: Includes VFD mode, inrush current testing and peak hold.
- LoZ AC/DC voltage measurement: Helps reduce misleading readings caused by induced ghost voltages.
- Expanded troubleshooting functions: Offers DC microamp, resistance, capacitance, frequency, temperature, diode and continuity testing.
- Practical field features: Includes NCV, live wire recognition, phase sequence detection, a 30mA RCD test function, backlight and flashlight.
Technical Specifications
Accuracy is expressed as ±(% of reading + digits).
| Measurement | Range | Accuracy |
|---|---|---|
| DC voltage | 600mV | ±(0.5% + 3 digits) |
| DC voltage | 6V / 60V / 600V | ±(0.5% + 2 digits) |
| DC voltage | 1000V | ±(0.8% + 5 digits) |
| AC voltage | 6V / 60V | ±(1.0% + 5 digits) |
| AC voltage | 600V | ±(0.8% + 5 digits) |
| AC voltage | 1000V | ±(1.0% + 5 digits) |
| Combined AC+DC voltage | 6V / 60V / 600V | ±(1.5% + 5 digits) |
| DC current | 60A / 600A / 1000A | ±(2.5% + 5 digits) |
| DC microamp current | 200μA / 2000μA | ±(1.2% + 5 digits) |
| AC current | 60A / 600A / 1000A | ±(2.5% + 5 digits) |
| Combined AC+DC current | 60A / 600A / 1000A | ±(3.0% + 8 digits) |
| Resistance | 600Ω | ±(1.0% + 2 digits) |
| Capacitance | 600nF / 6μF / 60μF / 600μF | ±(4.0% + 5 digits) |
| Capacitance | 6mF | ±(10% + 5 digits) |
| Frequency | 5Hz–1MHz | ±(0.1% + 5 digits) |
| Temperature | −40°C to 0°C | ±(5% + 4 digits) |
| Temperature | 0°C to 400°C | ±(2.0% + 3 digits) |
| Temperature* | −4°F to 50°F | ±(5% + 4 digits) |
| Temperature* | 50°F to 750°F | ±(2.0% + 5 digits) |
Functions and General Specifications
| Feature | Specification |
|---|---|
| True RMS | Yes |
| Display count | 5999 + 1999 |
| Range selection | Auto / Manual |
| LoZ AC/DC voltage | Up to 1000V |
| VFD mode | Yes |
| Inrush current test | Yes |
| Peak hold | Yes |
| MAX / MIN / AVG | Yes |
| Data hold | Yes |
| Relative mode | Yes |
| Diode test | Yes |
| Continuity buzzer | Yes |
| Non-contact voltage detection (NCV) | Yes |
| Live wire recognition | Yes |
| Phase sequence detection | Yes |
| RCD test | 30mA test function |
| Analog bar display | Yes |
| LCD backlight | Yes |
| Built-in flashlight | Yes |
| Auto power off | Yes |
| Measurement category rating | CAT III 1000V / CAT IV 600V |
| Power supply | 3 × 1.5V AA batteries |
Applications
- AC and DC system maintenance: Measure current and voltage in electrical distribution equipment and DC power circuits.
- Battery and charging system checks: Use DC current and voltage measurements to assess charging and load conditions within the meter’s ratings.
- Power conversion equipment troubleshooting: Use combined AC+DC measurement on circuits containing both components.
- Motor and VFD servicing: Investigate operating current and startup behavior with VFD mode, inrush testing and peak hold.
- HVAC and industrial equipment maintenance: Check current, capacitance, temperature and continuity during servicing.
- Building electrical inspections: Use phase sequence detection, live wire recognition and LoZ measurement to support wiring checks.
