Description
Testo 770-3 Clamp Meter – Overview and Capabilities
Testo 770-3 is the ideal instrument for complex measuring tasks in hard-to-reach places. Thanks to the folding pincer jaw, which fully retracts into the housing, the instrument can neatly grip tightly packed cables in switch cabinets.
The clamp meter automatically recognizes and determines the type of current (DC/AC) and other electrical parameters (resistance, continuity, diode check, capacitance), which makes work simpler and safer. Readings are displayed clearly and distinctly on the backlit two-line display.
Key Benefits and Functions
- Innovative Mechanism: Fully retractable (folding) pincer jaw for working with tightly packed cables.
- Extended Current Measurements: Measurement of inrush current, power, and small currents in the µA range.
- Automation: Automatic measuring parameter detection.
- RMS Measurement: Measurement of True Root Mean Square (True RMS).
- Temperature Measurement: Includes an adapter for thermocouple probes (Type K probe ordered separately).
- Smart Functions (Bluetooth): Communication with a mobile device via Bluetooth® and the testo Smart Probes or testo Thermography app.
- Documentation: Display of the measurement curve as a graph on a smartphone/tablet, simple documentation, and sending reports via e-mail.
Application Areas Overview
- Measurement of current consumption.
- Checking for the presence/absence of voltage.
- Measurement of air ionization in heating systems.
- Measurement of electrical power.
- Easy temperature check.
Technical Data (Order Number 0590 7703)
General Technical Data and Communication
| Weight: | 378 g |
| Dimensions: | 249 x 96 x 43 mm |
| Product Color: | black |
| Operating Temperature: | -10 … +50 °C |
| Storage Temperature: | -15 … +60 °C |
| Operating Humidity: | 0 … 80.0 % RH |
| Standards: | EN 61326-1; EN 61010-2-032; EN 61140 |
| Overvoltage Category: | CAT IV 600V; CAT III 1000V |
| Authorizations: | CSA; CE |
| Battery Type: | 3 AAA microcells |
| Display Type: | LCD |
| Display Size: | two lines |
| Interface: | 2 measuring sockets |
| Passive Resistance (AC/DC): | 11 MΩ |
| Connectable Probes: | 1 temperature probe (adapter required for Type K thermocouples) |
| System Requirements: | iOS 8.3+; Android 4.3+; Bluetooth required |
Temperature Measurement (Type K Thermocouple)
| Measuring Range: | -20 … +500 °C |
| Resolution: | 0.2 °C |
| Accuracy (0 … +100 °C): | ±1 °C |
Voltage Measurement (DC / AC)
| Parameter | Range | Resolution | Accuracy |
| Direct Current (DC): | 1.0 … 600.0 V | max. 1 meas. value | ± (0.8 % of meas. value + 3 Digit) |
| Alternating Current (AC): | 1.0 meas. value … 600.0 V | max. 1 meas. value | ± (1 % of meas. value + 3 Digit) |
Direct Current Measurement (DC Current)
| Method | Range | Resolution | Accuracy |
| Clamp: | 0.1 … 600.0 A | 0.1 | ± (2 % of meas. value + 5 Digit) |
| Measuring Leads: | 0.1 … 600.0 µA | 0.1 | ± (2 % of meas. value + 5 Digit) |
Alternating Current Measurement (AC Current)
| Method | Range | Resolution | Accuracy |
| Clamp: | 0.1 … 600.0 A | 0.1 A | ± (2 % of meas. value + 5 Digit) |
| Measuring Leads: | 0.1 … 600.0 µA | 0.1 µA | ± (1.5 % of meas. value + 5 Digit) |
Resistance, Capacitance, and Frequency Measurement
| Parameter | Range | Resolution | Accuracy |
| Resistance: | 0.01 … 60.0 MΩ | max. 0.01 Ω | ± (1.5 % of meas. value + 3 Digit) |
| Capacitance: | 2 nF … 60.00 mF | max. 0.01 nF | ± (1.5 % of meas. value + 5 Digit) |
| Frequency: | 0.01 Hz … 9999 kHz | max. 0.1 Hz | ± (1 % of meas. value + 1 Digit) |
Power and Power Factor Measurement
| Parameter | Range | Resolution | Accuracy |
| Active Power: | 0.1 W … 600 kW | 0.1 W | ± (5 % of meas. value + 5 Digit) |
| Reactive Power: | 0.1 … 600.0 kvar | 0.1 var | ± (10 % of meas. value + 5 Digit) |
| Apparent Power: | 0.1 VA … 600.0 kVA | 0.1 VA | ± 1 Digit |
| DC Power: | 0.1 W … 600.0 kW | max. 0.1 W | ± 1 Digit |
| Power Factor: | -1.00 … +1.00 | 0.01 | ± (10 % of meas. value + 5 Digit) |
