The Motwane LR 2045-S is a sophisticated, digital micro-ohmmeter designed for ultra-precise measurement of low resistance values. Engineered to replace traditional Kelvin Bridges, this 4½ digit instrument is essential for professionals conducting winding resistance tests, contact resistance measurements, and cable integrity verification.
Operating on the proven 4-wire (Kelvin) measurement method, the LR 2045-S eliminates lead resistance errors, delivering stable and accurate readings on both resistive and highly inductive loads. Its rugged, industrial-grade casing makes it suitable for demanding field environments, including substations and heavy engineering workshops .
Key Features & Benefits
- High Resolution & Accuracy: Achieves a best resolution of 1 µΩ on the 20mΩ range with a class-leading accuracy of ±0.05% of reading. This ensures reliable detection of minute resistance changes .
- Advanced Data Management: Features a large 4.3″ Color TFT Display for easy viewing. Unlike older models with simple LED screens, this unit includes a built-in thermal printer, USB connectivity for PC interfacing, and Bluetooth/Cloud connectivity via the MOTWANE App .
- Built-in Safety & Protection: Fully protected against Back EMF (up to 12kV pulse) generated by inductive loads like transformers and motors. It also includes mains overload and fuse protection for long instrument life .
- Heat Run Test Capability: Enables time vs. resistance graphing, allowing technicians to perform Heat Run Tests (temperature rise tests) on electrical equipment efficiently .
- Pulse Mode Operation: Features a 10-second pulse mode, allowing the device to test components without heating them up, preserving the integrity of the Device Under Test (DUT) .
Technical Specifications
| Specification | Detail |
|---|---|
| Model | LR 2045-S |
| Display | 4.3″ Color TFT (Backlit) / 4½ Digits |
| Resistance Range | 1 µΩ to 2000 Ω (Auto/Manual Range) |
| Test Current | 100 µA to 1 A DC |
| Accuracy | ±0.05% of Reading ± 5 Digits |
| Resolution | 1 µΩ (on 20mΩ range) |
| Printer | Inbuilt Thermal Printer |
| Interfaces | USB (PC Software included), Bluetooth, Cloud |
| Protection | Back EMF (12kV), Mains Overload, Fuse |
| Temperature Correction | Yes (0-100°C) with external probe |
| Power Supply | 230V AC ±10%, 50Hz |
| Dimensions (LxWxH) | 368 x 283 x 188 mm |
| Weight | Approx. 6.0 kg |
Applications
The Motwane LR 2045-S is versatile enough for various industrial and laboratory applications:
- Transformer Testing: Measuring winding resistance and performing heat run tests on alternators, generators, and motors .
- Switchgear & Breakers: Contact resistance measurement of circuit breakers, relays, switches, fuses, and busbars .
- Aerospace & Bonding: Bond testing of aircraft frames and static control circuits .
- Cable & Wire Industry: Resistance measurement of cables, wires, PCB tracks, and welded joints
