Yokogawa 701945 High Voltage Passive Probe, 1000Vrms, 250 MHz

The Yokogawa 701945 is a 100:1 passive probe engineered for high-voltage signal acquisition across low-voltage installations and protected internal circuits. It delivers DC to 250 MHz bandwidth with a maximum input rating of 1000 Vrms CAT II, making it suitable for measurements on household appliances, portable tools, and specialized test environments. The probe features 50 MΩ input impedance, approximately 7.5 pF input capacitance, and a 3-meter coaxial cable. Its spring-loaded tip minimizes contact pressure while the compensation range of 10 pF to 50 pF accommodates various oscilloscope input conditions.

– Technical Specifications

• Bandwidth: DC to 250 MHz (-3 dB)
• Attenuation Ratio: 100:1
• Input Resistance: 50 MΩ
• Input Capacitance: Approximately 7.5 pF
• Compensation Range: 10 pF to 50 pF
• Maximum Input Voltage: 1000 Vrms CAT II; 4000 V transient over-voltage CAT I; 4000 Vpeak CAT I
• Probe Cable Length: 3 meters
• Pollution Degree: 2

– Key Features

• Dual measurement category compliance: CAT II for low-voltage installations and CAT I for protected circuits
• Transient over-voltage protection rated to 4000 V CAT I
• Spring-loaded probe tip prevents slipping on board surfaces and reduces mechanical stress on devices under test
• Frequency-dependent input impedance behavior requires attention during high-frequency measurements
• Input voltage rating decreases with increasing signal frequency—pulse measurements must comply with specified derating curves

– Typical Applications

• Household appliance diagnostics and troubleshooting
• Portable tool electronics testing
• Protected circuit measurements in specialized industrial environments
• High-voltage transient capture in low-voltage systems

– Compatibility & Integration

The probe operates with Yokogawa oscilloscopes across ten series platforms: DL1700, DLM2000, DLM3000, DLM4000, DLM5000, DLM5000HD, DL/6000, DLM6000, DL9000, and SB5000. Oscilloscope input impedance must be configured to 1 MΩ. The attenuation ratio will set to 10:1 automatically on compatible instruments; manual configuration may be required on other platforms. Standard accessories include ground leads, solid and spring tips, insulated cap, pincher tip, tool, safety alligator clip, and color-coding rings.