The HZHL-S-200A is a high-precision digital switch detection instrument developed in accordance with the DL/T845.4-2019 power execution standard. Designed for safety and efficiency, it supports both single-ended and double-ended grounding testing, eliminating the need to disassemble grounding loops.

| Model | HZHL-S-200A |
|---|---|
| Working Voltage | AC220V ± 10% |
| Operating Temperature | −10°C to 50°C |
| Weight | 6.2KG |
| Parameter | Specification |
|---|---|
| Test Current | 50A / 100A / 150A / 200A |
| Range | 0μΩ to 80mΩ (50A) down to 0μΩ to 10mΩ (200A) |
| Minimum Resolution | 0.01μΩ |
| Measurement Method | Traditional back resistance & Intelligent test modes |
| Accuracy | Traditional: ±(val×0.5%+0.2μΩ); Intelligent: ±(val×2%+0.5μΩ) |
| Dimensions | 36 × 29 × 16 cm |