Yokogawa 701944/701945 100:1 High Voltage Probe

Yokogawa 701944/701945 100:1 High Voltage Probe

Document Overview

This document is the user manual for Yokogawa 701944 and 701945 models 100:1 high-voltage probes (8th edition, released in May 2024), which is primarily used to guide users in safely and correctly using this series of probes. It covers key content such as product usage, safety specifications, structural configuration, operating procedures, maintenance methods, and technical parameters. The content of the manual may change with product performance upgrades, and the latest version needs to be obtained through the official website. It also provides access to user registration, technical support contact information, and multilingual supporting documents (such as Chinese specific documents and European language safety manuals).

Safety regulations and symbol explanations

（1） Symbol rules

Warning symbols: including Warning (indicating operations and preventive measures that may cause serious or fatal injuries), CAUTION (indicating operations and preventive measures that may cause minor injuries or equipment damage), Note (indicating important information for correct equipment operation), and providing French translation instructions, suitable for multilingual usage scenarios.

Equipment symbol: The "manual reference required" symbol marked on the equipment indicates the need to consult the manual for special operating instructions to ensure that users do not miss key safety guidelines.

（2） Core Security Guidelines

Scope of use: The probe can only be used in conjunction with an oscilloscope for observing and measuring electrical signals. It is strictly prohibited to use it beyond the specified range; Measurement category II defined in accordance with IEC 61010-031 standard cannot be used for category III or IV scenarios. When combined with equipment/accessories of different measurement categories, the lower category shall prevail.

Grounding requirements: The protective grounding terminal of the oscilloscope must be grounded, and the grounding wire of the probe must be connected to the grounding potential. Double grounding can effectively prevent the risk of electric shock and ensure measurement safety.

Electric shock protection: It is strictly prohibited to operate with wet hands or use the probe when it is damp; Be cautious of electric shock when connecting the tested device, and do not remove the probe from the oscilloscope when connecting it to the tested device; Avoid contact with exposed circuits and remove metal jewelry such as watches and rings during operation to prevent accidental electric shock.

Environmental restrictions: Do not use in damp, dusty, or flammable/explosive environments to prevent equipment failure or safety accidents; In terms of altitude, the working altitude should not exceed 2000m, and the storage altitude should not exceed 15000m; the working temperature should be between 0-50 ℃, the storage temperature should be between -40~71 ℃, and the humidity should meet the linear decreasing requirement of 80% (≤ 31 ℃) to 40% (50 ℃) to avoid environmental factors affecting measurement accuracy or damaging equipment.

Equipment status: If there is suspicion of probe damage (such as torn signal cables or exposed internal metal), immediately stop using and contact the dealer for repair; It is strictly prohibited to disassemble or modify the probe. Yokogawa shall not be held responsible for any malfunctions caused by unauthorized modifications; Strict adherence to the maximum input voltage limit (1000 Vrms) is required. When the oscilloscope input is coupled to AC, the DC voltage input by the probe will be synchronously applied to the oscilloscope input, ensuring that it does not exceed the maximum input voltage of the oscilloscope.

Product Overview and Configuration

（1） Product Features

701944 and 701945 are both high-voltage probes with a 100:1 attenuation ratio, and their core advantages include:

Probe tip design: Spring type tip (pre installed) can reduce pressure on the tested device, prevent sliding on the surface of the circuit board, and provide better stability when tilted for use; There are also options for rigid tips and clamp tips, suitable for different measurement scenarios.

Compatibility: Suitable for oscilloscopes with an input impedance of 1M Ω, the probe ID pin can be automatically recognized by the oscilloscope, and the oscilloscope attenuation ratio can be automatically set to 10:1 (manual adjustment is required if not automatically set).

Rich attachments: Provides a variety of standard and optional attachments to meet different measurement needs, and supports accessory replacement to extend the service life of the probe.

（2） Configuration List

Standard accessories: including probe body (701944/701945), spring tip (pre installed), rigid tip, clamp tip, insulation cap, protective cap (pre installed), grounding wire (22cm), color markings (4 colors x 3 pieces), adjustment tools and manual. All accessories must be confirmed complete and undamaged after unpacking to avoid affecting use.

Optional accessories: including flexible adapter, 4mm plug grounding wire, and safety crocodile clip, which need to be purchased separately and can be flexibly selected according to the measurement scenario.