The Yokogawa 701977 is a high-voltage differential probe engineered for precision measurement of differential signals in circuits operating at elevated common-mode voltages. Rated to 7000 V peak, it delivers DC to 50 MHz bandwidth with selectable attenuation (100:1 or 1000:1) and integrated overload indicators. Purpose-built for power electronics analysis, railway inverter characterization, and floating signal measurement in demanding industrial environments.
Technical Specifications
• Bandwidth: DC to 50 MHz (–3 dB)
• Maximum Differential Input Voltage: 5000 Vrms or 7000 Vpeak (whichever is lower)
• Maximum Operating Input Voltage: 5000 Vrms and 7000 Vpeak or less
• Attenuation Ratio: Selectable 100:1 or 1000:1
– 100:1 mode: overload indicator at ±700 V differential
– 1000:1 mode: overload indicator at ±7000 V differential
• Input Resistance: 52 MΩ to ground
• Input Capacitance: 10 pF to ground
• Measurement Category: CAT0 5000 V; CAT III 1000 V
• Probe Length: 2840 mm
• Connector: BNC
• Warm-up Time: Minimum 30 minutes
– Key Features
• Requires external probe power supply (e.g., Yokogawa 701934); battery operation not supported
• Offset voltage adjustment via adjustment screw for calibration
• Compact, ergonomic design optimized for multi-channel measurements
• Durable construction rated for industrial environments
• Includes high-voltage alligator clips (red, black)
• Compatible with standard oscilloscope probe interfaces
– Typical Applications
• 3.3 kV railway drive inverter measurements
• High-voltage, low-frequency IGBT characterization
• High-voltage surge and noise waveform acquisition
• Floating signal measurement in power electronics and mechatronics
• General high-voltage differential signal analysis
– Compatibility & Integration
Universal compatibility with oscilloscopes featuring standard probe inputs. Operates with compatible Yokogawa probe power supplies. Optional accessories include conversion adapters (BNC to Banana, 758924) and terminal adapter sets for spring-held or screw-fastened configurations.
