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Lightweight and battery-powered, this Winding Resistance Meter delivers precise diagnostics and supports preventive maintenance. It includes advanced transformer core demagnetizing, optional temperature rise measurement, and automatic temperature compensation using up to two probes.
Our rentals come fully calibrated to traceable standards. Have your own instrument? We also offer calibration services for this model (CERTIWR1).
Lightweight and battery-powered, this Winding Resistance Meter delivers precise diagnostics and supports preventive maintenance. It includes advanced transformer core demagnetizing, optional temperature rise measurement, and automatic temperature compensation using up to two probes.
Our rentals come fully calibrated to traceable standards. Have your own instrument? We also offer calibration services for this model (CERTIWR1).
This product exceeds standard shipping dimensions/weight, as such it does not qualify for free shipping. We will contact you with your shipping costs.
The Raytech WR14 is a Winding Resistance meter system specially designed for high precision DC winding resistance measurement of high inductive windings such as large power transformer windings. Many power transformer’s faults such as shorted turns, tap changer problems and loose connections can be detected precisely.
For maximum mobility, the WR14 is battery operated and very lightweight. It includes also special tools such as advanced transformer core demagnetizing, temperature rise measurement and analysis (optional), and automatic temperature correction using up to 2 temperature probes. The WR14 can inject current to both high voltage and low voltage side using the jumper cable provided, and resistance measurement can be performed simultaneously using two separate measurement channels.
Measurement Methods
Additional Features
User Interface and Data Management
Durability and Support
| Accuracy Measurement Parameters | |
| Current range 10 to 15 A | Measuring range: 0.00 µΩ to 1 Ω Accuracy: ± 0.1% Rdg ± 0.1 µΩ Resolution: 5 Digits or 0.05 µΩ |
| Current range 5 to 10 A | Measuring range: 0.0 µΩ to 3 Ω Accuracy: ± 0.1% Rdg ± 0.2 µΩ Resolution: 5 Digits or 0.1 µΩ |
| Current range 1 to 5 A | Measuring range: 0.0000 mΩ to 15 Ω Accuracy: ± 0.1% Rdg ± 0.5 µΩ Resolution: 5 Digits or 0.5 µΩ |
| Current range 0.5 to 1 A | Measuring range: 0.000 mΩ to 30 Ω Accuracy: ± 0.1% Rdg ± 2 µΩ Resolution: 5 Digits or 1 µΩ |
| Current range 0.1 to 0.5 A | Measuring range: 0.000 mΩ to 300 Ω Accuracy: ± 0.1% Rdg ± 5 µΩ Resolution: 5 Digits or 2 µΩ |
| Current range 25 to 100 mA | Measuring range: 0.00 mΩ to 1200 Ω Accuracy: ± 0.1% Rdg ± 20 µΩ Resolution: 5 Digits or 10 µΩ |
| Current range <25 mA | Measuring range: 1.2 kΩ to 10 kΩ Accuracy: ± 0.1% Rdg ± 100 mΩ Resolution: 5 Digits or 200 mΩ |
| Current range <25 mA | Measuring range: 10 kΩ to 100 kΩ Accuracy: ± 0.5% Rdg ± 10 Ω Resolution: 4 Digits or 20 Ω |
| Resistance range | 0.00 µΩ to 100 kΩ |
| General Specifications | |
| Area of use | Portable to use indoor and outdoor including heavy industrial electromagnetic environments |
| Enclosure | Industrial high-impact plastic case |
| Supply | IEC 60320, C13/C14 mains connector, CAT II |
| Battery | Lithium-Ion battery, 14.8 V/ 6 Ah |
| Absolute input voltages | 90 to 264 V AC @ 47 to 63 Hz |
| Consumption power | Maximum 150 VA |
| Output power | Maximum 90 W |
| Test current user selectable | 25 mA to 15 A DC |
| Max. test voltage | 30 V DC |
| Display | 5.7" (14.5 cm) TFT Color LCD |
| Input devices | Touch screen, support mouse and keyboard |
| Interfaces | 2 USB 2.0 full speed (1 host, 1 device) and 9 Pin RS232 serial |
| Internal memory storage | 10.000 test results |
| Printer | Internal 1.9" (4.8 cm) thermal printer, support external printer direct connection |
| Operating temperature | 14 to 131°F (-10 to 55°C) |
| Storage temperature | -4 to 158°F (-20 to 70°C) |
| Degree of protection (closed door) | IP67, dust-tight and water immersion up to a 3.3' (1 m) depth |
| Size | 18.5 x 14.1 x 6.9" (470 x 357 x 176 mm) |
| Weight (instrument) | 20.6 lbs (9.4 kg) |
| Accuracy Measurement Parameters | |
| Current range 10 to 15 A | Measuring range: 0.00 µΩ to 1 Ω Accuracy: ± 0.1% Rdg ± 0.1 µΩ Resolution: 5 Digits or 0.05 µΩ |
| Current range 5 to 10 A | Measuring range: 0.0 µΩ to 3 Ω Accuracy: ± 0.1% Rdg ± 0.2 µΩ Resolution: 5 Digits or 0.1 µΩ |
| Current range 1 to 5 A | Measuring range: 0.0000 mΩ to 15 Ω Accuracy: ± 0.1% Rdg ± 0.5 µΩ Resolution: 5 Digits or 0.5 µΩ |
| Current range 0.5 to 1 A | Measuring range: 0.000 mΩ to 30 Ω Accuracy: ± 0.1% Rdg ± 2 µΩ Resolution: 5 Digits or 1 µΩ |
| Current range 0.1 to 0.5 A | Measuring range: 0.000 mΩ to 300 Ω Accuracy: ± 0.1% Rdg ± 5 µΩ Resolution: 5 Digits or 2 µΩ |
| Current range 25 to 100 mA | Measuring range: 0.00 mΩ to 1200 Ω Accuracy: ± 0.1% Rdg ± 20 µΩ Resolution: 5 Digits or 10 µΩ |
| Current range <25 mA | Measuring range: 1.2 kΩ to 10 kΩ Accuracy: ± 0.1% Rdg ± 100 mΩ Resolution: 5 Digits or 200 mΩ |
| Current range <25 mA | Measuring range: 10 kΩ to 100 kΩ Accuracy: ± 0.5% Rdg ± 10 Ω Resolution: 4 Digits or 20 Ω |
| Resistance range | 0.00 µΩ to 100 kΩ |
| General Specifications | |
| Area of use | Portable to use indoor and outdoor including heavy industrial electromagnetic environments |
| Enclosure | Industrial high-impact plastic case |
| Supply | IEC 60320, C13/C14 mains connector, CAT II |
| Battery | Lithium-Ion battery, 14.8 V/ 6 Ah |
| Absolute input voltages | 90 to 264 V AC @ 47 to 63 Hz |
| Consumption power | Maximum 150 VA |
| Output power | Maximum 90 W |
| Test current user selectable | 25 mA to 15 A DC |
| Max. test voltage | 30 V DC |
| Display | 5.7" (14.5 cm) TFT Color LCD |
| Input devices | Touch screen, support mouse and keyboard |
| Interfaces | 2 USB 2.0 full speed (1 host, 1 device) and 9 Pin RS232 serial |
| Internal memory storage | 10.000 test results |
| Printer | Internal 1.9" (4.8 cm) thermal printer, support external printer direct connection |
| Operating temperature | 14 to 131°F (-10 to 55°C) |
| Storage temperature | -4 to 158°F (-20 to 70°C) |
| Degree of protection (closed door) | IP67, dust-tight and water immersion up to a 3.3' (1 m) depth |
| Size | 18.5 x 14.1 x 6.9" (470 x 357 x 176 mm) |
| Weight (instrument) | 20.6 lbs (9.4 kg) |
