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Fluke 377 User Manual

Fluke 377
24 pages
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September 2020
©2020 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies.
377/377 FC
378/378 FC
Clamp Meter
Users Manual
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

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Fluke 377 Specifications

General IconGeneral
CategoryClamp Meter
True-RMSYes
Voltage AC/DC1000 V
Resistance60 kΩ
Display TypeLCD
AC Current1000 A
DC Current500 A
Frequency5 Hz to 500 Hz
Frequency Range5 Hz to 500 Hz
Safety RatingCAT IV 600 V
Wireless ConnectivityFluke Connect
Battery Type2 x AA

Summary

Introduction to the Clamp Meter

Key Features and Concepts

Explains Field Sense, L1-L2-L3 measurement, and the Fluke Connect system.

Radio Frequency Data

Information regarding radio frequency data and compliance declarations.

Getting Started

Battery Safety and Installation

Covers warnings, cautions, and steps for installing batteries safely.

Clamp Meter Controls and Features

Details the buttons, display, and key features of the clamp meter.

Display Annunciators and Indicators

Explains the symbols and indicators shown on the clamp meter display.

Power Management

Auto Power Off Functionality

Automatically powers off after 20 minutes of inactivity. Can be disabled.

Backlight Operation

Improves display readability in dim light. Has manual and auto-off features.

Advanced Operations

Customizing Power-On Options

Configure settings like beeper, auto backlight, auto power shutoff, and PQ Level.

Entering and Using Maintenance Mode

Access to check LCD segments, firmware version, battery status, and calibration info.

Basic Measurement Procedures

Hazardous Voltage Indicator

Alerts user to hazardous voltage levels (±30V or overload) on the display.

Field Sense Measurement Procedure

Steps for measuring AC current, voltage, and frequency using Field Sense.

Three-Phase (L1-L2-L3) Measurement

Procedure for sequential line-to-ground and line-to-line voltage measurements in three-phase systems.

AC/DC Voltage Measurement with Leads

Procedure for measuring AC/DC voltage using test leads and terminals.

Resistance and Continuity Measurement

Steps for measuring resistance and continuity, including beeper behavior.

Capacitance Measurement Procedure

Steps for measuring capacitance, including safety notes and error indications.

DC Current Measurement

Procedure for measuring DC current using the clamp jaw.

Using the iFlex Probe

Instructions for connecting and using the flexible current probe for measurements.

Measurement Features

Display Hold Functionality

Captures and holds the display reading, includes periodic beeps and voltage alerts.

MIN/MAX/AVG Measurement Mode

Captures minimum, maximum, and average readings; beeps on new high/low values.

Inrush Current Measurement

Captures surge current spikes from devices upon power-on.

Data Logging and Firmware

Data Logging with Fluke Connect

Enables data logging via Fluke Connect app; logging interval set in app.

Firmware Version Check

Procedure to find the clamp's firmware version via maintenance mode.

Product Care and Service

Maintenance and Cleaning Procedures

Covers routine maintenance, cleaning case, and environmental disposal.

Service and Calibration Information

Details recommended calibration intervals and authorized service centers.

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