The Testo 770-3 TRMS Clamp Meter is the ultimate solution for high-accuracy electrical measurement in confined or complex environments. With its retractable pincer arm, this clamp meter makes it easy to grab tightly packed cables for non-contact current measurements, even in tight switchboards or control panels. Designed for electricians, HVAC technicians, and industrial engineers, the 770-3 is the most advanced model in Testo’s clamp meter range.
Equipped with True RMS (TRMS) measurement, automatic AC/DC detection, and Bluetooth connectivity to the Testo Smart App, the Testo 770-3 delivers highly precise readings, including in the low current range. Measure current, voltage (up to 1000V), resistance, capacitance, frequency, diode, and continuity with ease. Additional features include starting current, power, and μA measurements, making it ideal for troubleshooting and advanced diagnostics.
Compatible with an optional Type K thermocouple adapter, the 770-3 can also record temperatures—making it a true multifunction tool for professionals.
✅ Retractable Pincer Arm – Easily clamps tightly packed cables for fast and accurate readings
✅ True RMS Accuracy – Delivers precise measurement even on non-linear loads
✅ Bluetooth Enabled – Sync with the Testo Smart App for real-time data, graphing, reports, and remote viewing
✅ Extended Voltage Range – Measures up to 1000V AC/DC
✅ Low Current Accuracy – Improved resolution delivers reliable data at μA levels
✅ Auto Parameter Detection – Effortlessly switches between AC/DC, resistance, continuity, and more
✅ Two-Line Display – Large, easy-to-read screen for real-time values
✅ Multifunctional – Supports starting current, power, μA, and temperature measurements (with optional adapter)
✅ Complete Kit – Includes measuring leads, crocodile clips, micro clips, batteries, carrying case, and test protocol
Whether you're inspecting industrial panels, diagnosing HVAC systems, or maintaining critical electrical installations, the Testo 770-3 offers the precision, flexibility, and smart connectivity professionals need on-site.
Order now and take control of every measurement with the Testo 770-3 TRMS Clamp Meter – engineered for performance, accuracy, and Bluetooth-powered smart data handling.
DC Voltage
| Measuring range | 1.0 to 1000.0 V |
|---|---|
| Resolution | Max. 1 mV |
| Accuracy | ± (0.8 % of mv + 3 Digits) |
AC Voltage
| Measuring range | 1.0 mV to 1000.0 V |
|---|---|
| Resolution | Max.1 mV |
| Accuracy | ± (1% of mv + 3 Digit) |
DC Current
| Measuring range | 0.01 to 600.0 A (clamp) 0.1 to 600.0 μA (measuring cables) |
|---|---|
| Resolution | 0.1 (clamp) 0.1 (measuring cables) |
| Accuracy | ± (2 % of mv + 5 Digit) (measuring cables) ± (2 % of mv + 5 Digit) (clamp) |
AC Current
| Measuring range | 0.01 to 600.0 A (clamp) 0.1 to 600.0 μA (measuring cables) |
|---|---|
| Resolution | 0.01 A (clamp) 0.1 μA (measuring cables) |
| Accuracy | ± (2 % of mv + 5 Digit) (clamp) ± (1.5 % of mv + 5 Digit) (measuring cables) |
Resistance
| Resolution | Max. 0.01 Ohm |
|---|---|
| Measuring Range | 0.10 to 60.0 MOhm |
| Accuracy | ± (1.5 % of mv + 3 Digit) |
Capacitance
| Resolution | Max. 0.001 nF |
|---|---|
| Measuring Range | 0.001 μF to 60000.00 μF |
| Accuracy | ± (1.5 % of mv + 5 Digits) |
Frequency
| Resolution | max. 0.1 Hz |
|---|---|
| Measuring Range | 0.00 Hz to -10 kHz |
| Accuracy | ± (0.1 % of mv + 1 Digit) |
General Technical Data
| Brand | Testo |
|---|---|
| Product Type | Digital Clamp Multimeter |
| Operating Humidity | 0 to 80 %RH |
| Storage temperature | -15 to +60 °C |
| Operating temperature | -10 to +50 °C |
| Standards | EN 61326-1; EN 61010-2-033; EN 61140 |
| Protection Class | IP64 |
| Display Size | 2 Lines |
| Display Type | LCD (Liquid Crystal Display) |
| Interface | 2 Measuring Jacks |
| Overvoltage Category | CAT IV 600V; CAT III 1000V |
| Internal Resistance | 11 MOhm (AC / DC) |
| Dimensions | 249 x 96 x 43 mm |
| Weight | 378g |
| Warranty | 2 Years |
Instrument Measurement Functions
| Diode Test | Yes |
|---|---|
| Continuity Test | Yes |
| Display Lighting | Yes |
| Hold | Yes |
| Min- Max | Yes |
| Power Measurement | Yes |
| Temperature Measurement with Adapter | Yes |
| True RMS | Yes |
| Inrush Current Measurement | Yes |
| Bluetooth | Yes |
| Display (counts) | 6000 |
| Autom. Measurement Parameter Detection | Yes |
| μA current measuring range | Yes |
✅ Retractable Pincer Arm – Easily clamps tightly packed cables for fast and accurate readings
✅ True RMS Accuracy – Delivers precise measurement even on non-linear loads
✅ Bluetooth Enabled – Sync with the Testo Smart App for real-time data, graphing, reports, and remote viewing
✅ Extended Voltage Range – Measures up to 1000V AC/DC
✅ Low Current Accuracy – Improved resolution delivers reliable data at μA levels
✅ Auto Parameter Detection – Effortlessly switches between AC/DC, resistance, continuity, and more
✅ Two-Line Display – Large, easy-to-read screen for real-time values
✅ Multifunctional – Supports starting current, power, μA, and temperature measurements (with optional adapter)
✅ Complete Kit – Includes measuring leads, batteries, carrying case, and test protocol
