Feature: 1. Multifunction: Can detect open phase condition and phase sequence using LED indicators and buzzer alerts. 2. Frequency Range: 20Hz to 400Hz; equipped with red, green, and yellow LEDs and buzzer indication for clear status feedback, suitable for daily work requirements. 3. Stable Performance: Provides fast, accurate, efficient, reliable, and safe measurements with ease of use. 4. Durable Material: Constructed from high-quality ABS material; lightweight, wear-resistant, corrosion-resistant, and designed for long service life. 5. User-Friendly Design: Includes dedicated test clips that securely attach to the test lead metal probes, allowing convenient clamping at various measurement points. Specification: Item Type: 3 Phase Rotation Tester Material: ABS Model: SM852B Purpose: 3-phase alternating current measurement Measurable Frequency Range: 20Hz~400Hz Continuous Use Time: Up to 60 minutes at 200V AC, up to 4 minutes at 600V AC Package List: 1 x 3 Phase Rotation Tester 3 x Clip 1 x Manual 1 x Portable Cloth Bag Note: 1. This is high-voltage test equipment. Before use, inspect the device for any damage. Discontinue use immediately if any of the following conditions are present: A: Visible damage to the device (e.g., cracks or damage to the housing, exposed wires on test leads) B: The device was subjected to severe impact during transport C: The device has been stored for a long time in unsuitable conditions (e.g., damp or humid environments such as bathrooms) Perform necessary inspections and repairs before further use to prevent electric shock or safety hazards. 2. Never open the device casing during operation to avoid risk of electric shock. 3. During measurement, high voltage is present at the test leads. Do not touch exposed wires or metal parts directly with bare hands. 4. Even if all phase indicators are off, voltage may still be present in the circuit. Exercise caution to prevent electric shock. 5. Do not measure circuits exceeding 600V to avoid safety risks. 6. When measuring at 200V AC, continuous usage should not exceed 60 minutes. At 600V AC, continuous usage should not exceed 4 minutes. 7. Do not use the device outdoors in rainy conditions or in humid environments to prevent safety hazards. 8. Avoid contact with water or corrosive liquids. Do not store in areas exposed to direct sunlight, high temperatures, or high humidity to maintain performance. 9. Only qualified personnel should operate this device. Unauthorized disassembly is prohibited to ensure safety and accuracy. 10. Operators must have received proper training and understand high-voltage safety procedures. Always follow instructions provided in the manual when performing measurements.