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Description
Testo 750-3 Voltage Tester (0590 7503)
A reliable, precise two-pole voltage tester for HVAC technicians and electricians. The 750-3 combines a patented all-round LED fibre-optic display with a secondary LC screen, so readings are clear from any angle—even in tight plant rooms or low light.
Key Features
- 360° fibre-optic LED band plus LC display for instant, legible results
- Single-pole phase test and two-pole voltage test (12–690 V)
- Continuity, phase rotation (rotating magnetic field), and RCD/RC trigger tests
- Vibrating load buttons to prevent accidental trigger tests
- Integrated work light, anti-slip ring, and ergonomic handle
- Rugged, IP64 housing for demanding sites
- Safety: EN 61243-3:2010, CAT IV 600 V / CAT III 1000 V
What It Tests
- Voltage present/absent and de-energization (two-pole)
- Single-pole phase detection
- Continuity (< 500 kΩ)
- Phase rotation (100–690 V at 50/60 Hz)
- RCD trip via RC trigger function
Why Choose the 750-3
- Compared to 750-1: adds single-pole test, phase rotation, RCD trigger, torch, and LC display
- Compared to 750-2: adds the LC display for precise numeric readouts
Model Comparison
| Technical Data | Testo 750-1 | Testo 750-2 | Testo 750-3 |
|---|---|---|---|
| Voltage testing | 12–690 V | 12–690 V | 12–690 V |
| Continuity testing | < 500 kΩ | < 500 kΩ | < 500 kΩ |
| Phase rotation (rotating magnetic field) | 100–690 V @ 50/60 Hz | 100–690 V @ 50/60 Hz | 100–690 V @ 50/60 Hz |
| Single-pole phase testing | – | 100–690 V @ 50/60 Hz | 100–690 V @ 50/60 Hz |
| RCD/RC trigger function | – | Yes | Yes |
| LC display | – | – | Yes |
| Measuring-point illumination | – | Yes | Yes |
| Overvoltage category | CAT IV 600 V / CAT III 1000 V | CAT IV 600 V / CAT III 1000 V | CAT IV 600 V / CAT III 1000 V |
| Protection class | IP64 | IP64 | IP64 |
| Operating temp. | -10 to +50 °C | -10 to +50 °C | -10 to +50 °C |
| Storage temp. | -15 to +60 °C | -15 to +60 °C | -15 to +60 °C |
| Dimensions (L×W×H) | 270 × 65 × 35 mm | 270 × 70 × 35 mm | 270 × 70 × 35 mm |
| Weight | 119 g | 243 g | 243 g |
| Warranty | 2 years | 2 years | 2 years |
| Authorisations | TÜV, CSA, CE | TÜV, CSA, CE | TÜV, CSA, CE |
Downloads
Warranty
2 years
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