Yokogawa 700986 Logic Probe

The Yokogawa 700986 Logic Probe is an 8-channel, non-isolated digital analysis instrument designed for logic state detection and signal integrity verification in digital circuit troubleshooting. This probe delivers real-time measurement capability with 1 µs or less response time, enabling rapid diagnosis of digital faults and signal anomalies across multiple channels simultaneously.

Technical Specifications

• Channels: 8 independent inputs


• Input Configuration: Non-isolated (common ground for all bits and main unit)


• Maximum Input Voltage: 42 V (DC+ACpeak) for CAT I and CAT II applications (30 Vrms)


• Response Time: 1 µs or less


• Input Impedance: Approximately 100 kΩ


• Logic Threshold Level: Approximately 1.4 V

Key Features

• Eight simultaneous measurement channels for parallel digital signal capture


• Fast 1 µs response time minimizes measurement latency in time-critical diagnostics


• High input impedance (≈100 kΩ) reduces circuit loading effects


• Overvoltage protection rated to 42 V maximum


• Includes two measurement leads (B9879PX and B9879KX) for direct probe connection

Typical Applications

• Digital logic state verification during circuit design and validation


• Multi-channel signal integrity assessment in embedded systems


• Fault isolation in microprocessor-based and digital control circuits


• Real-time logic level monitoring during system commissioning and troubleshooting

Compatibility & Integration The 700986 integrates directly with Yokogawa DLM oscilloscopes and ScopeCorder models, enabling synchronized multi-domain analysis where logic measurements can be correlated with analog signal observations. This integration streamlines debugging workflows by centralizing digital and analog data capture within a single measurement platform.