Tools / Measuring Tools
Safety Information for Fluke 15B+/17B+/18B+ Digital Multimeter
Essential safety guidelines, operating precautions, and technical specifications for the Fluke 15B+, 17B+, and 18B+ digital multimeters. Includes CAT ratings, fuse protection, and environmental limits.
Table of contents
Important Safety Information
This document provides essential safety guidelines for the Fluke 15B+, 17B+, and 18B+ Digital Multimeters. Users must read and understand these instructions to prevent electric shock, fire, or physical injury.
General Safety Precautions
- Inspect the product housing and test leads for damage before use. Do not use if damaged.
- Do not use in explosive gas or vapor environments, or in wet/damp conditions.
- Always use the correct measurement category (CAT), voltage, and amperage ratings for the task.
- Keep fingers behind the finger guards on the probes.
- Disconnect test leads before opening the battery cover or housing.
- If the device will not be used for an extended period or stored above 50°C, remove the batteries to prevent leakage.
- When measuring current, disconnect circuit power before connecting the meter in series.
- When measuring resistance, continuity, capacitance, or diode connections, disconnect power and discharge all high-voltage capacitors.
Technical Specifications
- Maximum Voltage (Terminal to Ground): 600 V
- Maximum Voltage (V-COM Terminals): 1000 V
- Battery Type: 2 AA, IEC LR6
- Operating Temperature: 0°C to 40°C
- Storage Temperature: -30°C to 60°C
- Operating Altitude: 2000 m
- IP Rating: IP 40
- Fuse Protection (mA/µA inputs): 0.44 A, 1000 V, IR 10 kA
- Fuse Protection (A input): 11 A, 1000 V, IR 17 kA
Symbols
The device uses standard electrical symbols. Key symbols include:
- CAT II: For measurement circuits connected directly to low-voltage installation points (e.g., power outlets).
- CAT III: For measurement circuits connected to the distribution part of the building's low-voltage installation.
- CAT IV: For measurement circuits connected to the source of the building's low-voltage installation.
- Warning Symbol: Indicates risk of electric shock or danger.
Electromagnetic Compatibility (EMC)
This equipment is Class A, designed for industrial environments. It is not intended for use in residential environments and may not provide adequate protection against radio signals in such settings.
Manufacturer information
Fluke Corporation
Practical help
Common problems
Low battery indicator appears
Replace batteries immediately to avoid incorrect measurements.
Device not working
Check for damaged housing, test leads, or blown fuses. Ensure batteries are installed correctly.
Battery leakage
Repair the device before use; clean affected areas and seek medical help if exposed to chemicals.
Before use
- Inspect the housing for cracks or missing plastic.
- Check test leads for damaged insulation.
- Verify the device is set to the correct measurement category (CAT) and range.
- Ensure the battery cover is securely closed.
- Test the device on a known voltage source before critical measurements.
Specs in practice
- 1000 V (V-COM)
- Maximum voltage allowed between the V and COM terminals.
Model compatibility
- Not for use in residential environments (Class A equipment).
- Requires 2 AA batteries.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.