testo 770-3 - Clamp Meter with Bluetooth
- Professional clamp meter solutions for demanding electrical work
When accuracy, safety and speed matter, choosing the right clamp meter makes all the difference. Designed for professional electricians and engineers, the Testo 770 series delivers reliable performance in confined electrical panels, modern installations and complex diagnostics. With advanced TRMS technology, Bluetooth connectivity and an innovative grab mechanism, this range is built to perform in real-world conditions.
👉 Get expert advice or request a quote today and upgrade your electrical testing capability.
▶ See What the Testo 770 Can Really Do:
testo 770-3 Clamp Meter with Bluetooth (P/N: 0590 7703 02)
The testo 770-3 Clamp Meter is the most advanced model in the series, developed for high-precision electrical measurements in tight working environments. Thanks to improved resolution, it provides excellent accuracy in the lower current range, making it suitable for both standard and sensitive applications.
Testo 770-3 Key Features:
- True RMS measurement for accurate readings on non-linear loads (testo 770-3 TRMS)
- Automatically selects the correct measurement function and automatically detects AC/DC voltage
- Large dual line display for clear, simultaneous readings
- Fully retractable pincer arm for safe, non-contact measurement on tightly packed cables
- Bluetooth enabled connectivity to the testo Smart App
- Extended voltage measurement up to 1000 V
- Safety rated to measurement category CAT IV
The intelligent grab mechanism allows precise conductor capture where conventional clamps struggle. Measurement values can be viewed directly on the instrument or streamed in real-time to a connected smartphone or tablet for documentation and reporting.
Additional functions include starting current, power measurement, resistance, continuity, diode and capacitance testing, plus min max value recording. Temperature measurement is supported via optional type k thermocouples.
What comes with the testo 770-3?
- Testo 770-3 Clamp Meter with Bluetooth
- Measuring Leads
- Carrying Case
- 3 x AAA Batteries
- Test Protocol
(The testo 770-3 Refrigeration Starter Kit P/N: 300564 5000 02 also contains the testo 316-3 Refrigerant Leak Detector)
testo 770-3 Premium kit – Clamp Meter with Bluetooth (P/N: 0590 7703 03)
The 770-3 Premium kit is ideal for professionals who want a complete, ready-to-use measurement solution. Built around the same high-performance clamp meter, this kit adds essential accessories to increase efficiency on site and reduce the need for additional tools.
What‘s extra in the 770-3 Premium Kit?
- Crocodile Clips and Micro Clips
- Magnetic Holder for Hands-Free Operation
- Type K Temperature Probe for Integrated Temperature Measurement
This configuration is especially well suited to engineers carrying out combined electrical and thermal checks during maintenance, commissioning or troubleshooting work.
Smart App Connectivity and Reporting
Using Bluetooth, measurement data can be transferred to the testo Smart App, where readings can be visualised as graphs, saved into reports and shared instantly. This simplifies compliance documentation and helps reduce time spent on manual reporting.
| Measurement | Measuring Range | Resolution | Accuracy |
| Temperature (TC Type K, NiCr-Ni) | -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 | 0.01 to 600.0 A (clamp)
0.1 to 600.0 µA (measuring cables) | 0.1 A (clamp)
0.1 µA (measuring cables) | ± (2 % of mv + 5 digit) (clamp)
± (2 % of mv + 5 digit) (measuring cables) |
| AC Current | 0.01 to 600.0 A (clamp)
0.1 to 600.0 µA (measuring cables) | 0.01 A (clamp)
0.1 µA (measuring cables) | ± (2 % of mv + 5 digit) (clamp)
± (1.5 % of mv + 5 digit) (measuring cables) |
| Resistance | 0.10 to 60.0 MΩ | max. 0.01 Ω | ± (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 600.0 kW | 0.1 W | ± (5 % of mv + 5 digit) |
| Reactive Power | 0.1 to 600.0 kvar | 0.1 var | ± (10 % of mv + 5 digit) |
| Apparent Power | 0.1 VA to 600.0 kVA | 0.1 VA | ± 1 digit |
| Power Factor | -1.00 to +1.00 | 0.01 | ± (10 % of mv + 5 digit) |
| Instrument Measurement Functions | |
| Diode test | ✓ |
| Continuity testing | ✓ |
| Display lighting | ✓ |
| Hold | ✓ |
| MinMax | ✓ |
| Power Measurement | ✓ |
| Temperature measurement with adapter | ✓ |
| True RMS | ✓ |
| Inrush current measurement | ✓ |
| Bluetooth | ✓ |
| Display (counts) | 6,000 |
| Automatic measurement parameter detection | ✓ |
| µA current measuring range | ✓ |
❓ Frequently Asked Questions (FAQ)
Q1: Is this clamp meter suitable for tight electrical cabinets?
A. Yes. The retractable pincer design allows safe and accurate measurements in crowded switch cabinets and control panels.
Q2: Does the Premium kit support temperature measurement?
A. Yes. The supplied Type K probe allows temperature measurement alongside electrical parameters.
Q3: Can results be logged automatically?
A. When connected to the testo Smart App, readings can be logged, graphed and exported digitally.
Q4: Is this suitable for professional electrical installations?
A. Yes. With a CAT IV safety rating and TRMS measurement, it is designed for demanding professional use.