The Testo 770-3 Premium Kit is a solid choice for any tradie needing to accurately measure electrical parameters, especially in tight or crowded panels. This TRMS clamp meter makes non-contact measurements easy and reliable, giving you confidence in your readings.
From fault finding on a busy commercial refrigeration unit to checking power draw on a residential split system, this kit handles it. I've been in plenty of tight spots where that retractable pincer arm makes all the difference for a quick, safe grab.
Best For
- HVAC service technicians
- Refrigeration mechanics
- Electrical installers and troubleshooters
- Industrial maintenance teams
Compatibility
This meter is designed for a broad range of electrical systems, handling up to 1000V AC/DC. It connects seamlessly via Bluetooth to the Testo Smart App (requires iOS 11.0+ or Android 6.0+) and other compatible Testo measuring instruments for data logging and reporting. If you're running a different model, check fittings and specs before ordering.
Features
- Retractable Pincer Arm: Allows for secure, non-contact measurements on tightly packed cables, reducing hassle and improving safety.
- TRMS Measurement: Provides accurate readings on non-linear loads common in modern electrical systems.
- Enhanced Resolution: Delivers precise results, even when working with lower current ranges.
- Auto AC/DC & Parameter Detection: Simplifies operation by automatically identifying and selecting correct measurement parameters like resistance, continuity, diode, and capacitance.
- Bluetooth Connectivity: Pair with the Testo Smart App for real-time data display, graphical trend analysis, saving readings, and generating reports.
- Multifunction Measurement: Handles starting current, active/reactive/apparent power, μA, and temperature with the included Type K thermocouple adapter.
Technical Specifications
| Parameter | Range | Resolution | Accuracy |
|---|---|---|---|
| Temperature (Type K) | -20 to +500 °C | 0.2 °C | ±1 °C (0 to +100 °C) |
| DC Voltage | 1.0 to 1000.0 V | max. 1 mV | ±(0.8 % of mv + 3 Digit) |
| AC Voltage | 1.0 mV to 1000.0 V | max. 1 mV | ±(1 % of mv + 3 Digit) |
| DC Current (Clamp) | 0.01 to 600.0 A | 0.1 A | ±(2 % of mv + 5 Digit) |
| AC Current (Clamp) | 0.01 to 600.0 A | 0.01 A | ±(2 % of mv + 5 Digit) |
| Resistance | 0.10 to 60.0 MOhm | max. 0.01 Ohm | ±(1.5 % of mv + 3 Digit) |
| Capacitance | 0.001 μF to 60000.00 μF | max. 0.01 nF | ±(1.5 % of mv + 5 Digit) |
| Frequency | 0.00 Hz to 10 kHz | max. 0.1 Hz | ±(1 % of mv + 1 Digit) |
| Active Power | 0.1 W to 600 kW | 0.1 W | ±(5 % of mv + 5 Digit) |
| Overvoltage Category | CAT IV 600V; CAT III 1000V | ||
| Operating Temperature | -10 to +50 °C | ||
| Dimensions (Meter) | 249 x 96 x 43 mm | ||
| Weight (Meter) | 378 g | ||
| Battery Type | 3 x AAA micro batteries | ||
| Display Type | LCD (2 lines, 6,000 counts) |
What's in the Box
- Testo 770-3 Clamp Meter with Bluetooth
- Standard measuring cables (angled plug, tip Ø 2 mm, 1225 mm length)
- Crocodile clips (CAT IV 600V / CAT III 1000V)
- Micro clips (CAT IV 600V / CAT III 1000V, max 3A)
- Adapter for Type K thermocouples
- Magnetic suspension system
- Transport bag
- 3 x AAA batteries
- Test report
Using It on the Job
- Always isolate power and use appropriate lockout/tagout procedures before working on live electrical systems.
- Select the correct measurement function, or let the auto-detection feature assist you for common parameters.
- Utilise the retractable pincer arm for easy and safe current measurements, especially when cables are tightly packed.
- Connect the meter to the Testo Smart App via Bluetooth to log readings, view measurement curves, and generate reports on your mobile device.
- For temperature checks, attach a Type K thermocouple to the included adapter and place it on the surface or in the air as needed.
- After use, clean the meter with a damp cloth and store all components in the transport bag to protect them from dust and damage on site.
Limitations & Safety Notes
- Always adhere to local electrical safety standards and Safe Work Australia guidelines.
- Do not exceed the specified CAT IV 600V or CAT III 1000V overvoltage category ratings to prevent injury or damage to the meter.
- Regularly inspect test leads and accessories for any signs of wear or damage before each use.
- Only use this meter on electrical systems within its specified measurement ranges and compatible environments.
Tradie Pro Tip
When you're dealing with old, brittle wiring in a packed switchboard, that retractable pincer arm on the 770-3 is a game changer for getting a solid, safe reading without disturbing anything else. Make use of the magnetic holder too, keeps your hands free when needed.
Pair With
Pair your Testo 770-3 kit with Testo smart probes, quality electrical safety gloves, and insulation testers for a comprehensive electrical diagnostics setup.