Testo 770-1 TRMS Clamp Meter
The Testo 770-1 TRMS Clamp Meter is designed for professional HVAC and electrical applications. Its standout feature is the unique hook-on clamp that makes wire separation and gripping effortless. With a retractable post, it lets you work in compact areas without the need for additional tools.
This clamp meter goes further by automatically identifying the test procedure in progress. It sets the right configuration on its own, improving accuracy and saving valuable time. It supports a wide range of tasks including inrush current, frequency, and voltage measurement.
Smart Features and Design
Testo 770-1 TRMS Clamp Meter has a 4,000-count display and strong measurement ranges for voltage, current, resistance, capacitance and frequency. Whether you’re diagnosing circuits or checking continuity, this meter ensures clear readings and reliable performance.
Durability and Safety
Built to meet CAT IV 600 V and CAT III 1000 V standards, the Testo 770-1 offers dependable protection for daily field work. Its compact size and 378 g weight make it ideal for handheld use, while functions like data hold and auto power off provide added convenience.
Key Features
- Measures AC and DC current up to 400 A
- Retractable hook clamp for tight spaces
- Voltage measurement up to 600 V
- Automatic measurement recognition
- Records inrush (starting) current
- Frequency range up to 10 kHz
- 4,000 count digital display
- Capacitance measurement up to 100 μF
- Continuity and diode test included
- CAT IV 600 V and CAT III 1000 V safety rating
- Auto Power Off for battery saving
- Compact and lightweight at 378 g
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