Related Manuals for HT COMBI420
Summarization of Contents
SAFETY PRECAUTIONS AND PROCEDURES
Safe Operation Guidelines
Instructions for safe use, including preliminary, during, and after use recommendations.
Overvoltage Categories Definitions
Definitions of measurement categories (IV, III, II, I) relevant to electrical safety.
GENERAL DESCRIPTION AND PREPARATION FOR USE
Instrument Introduction and Operation
Overview of the 400 Series, its capabilities, and basic operation.
Pre-Use Checks and Power Supply
Initial checks, package content, battery, calibration, and storage guidelines.
INSTRUMENT OPERATION AND MAIN MENU
Instrument Layout and Controls
Identification of front, upper, and side panel components, including buttons and connectors.
Keyboard, Display, and Settings
Explanation of keyboard functions, display features, and access to instrument settings.
Main Menu Navigation
Accessing and navigating the main menu for measurement selection and configuration.
ELECTRICAL SYSTEM TEST PROCEDURES
AUTO Mode Test Sequence
Automatic sequence for earth resistance, RCD tripping time, and insulation resistance.
LOWOHM Continuity Test
Performing continuity tests with 200mA, including CAL mode and anomalous results.
ΜΩ Insulation Resistance Measurement
Measuring insulation resistance with various test voltages (50V-1000V).
RCD Test Operations and Modes
Testing RCDs including AUTO mode and specific test parameters like IdN.
LOOP IMPEDANCE, EARTH RESISTANCE, AND PHASE SEQUENCE TESTS
LOOP Impedance Measurement
Measuring line/loop impedance and prospective short circuit current.
Ra 15mA Earth Resistance Test
Measuring total earth resistance without tripping RCDs.
123 Phase Sequence Test
Determining the sequence of phases and handling incorrect results.
AUXILIARY MEASUREMENTS AND MAINS ANALYSIS
AUX Environmental Parameter Measurement
Measuring air speed, humidity, temperature, light, and noise levels.
LEAK Leakage Current Measurement
Measuring leakage current using an external clamp.
PWR Mains Parameter Measurement
Measuring mains voltage, current, power, and power factor.
MEMORY MANAGEMENT AND PC CONNECTION
Saving, Recalling, and Deleting Measures
Procedures for managing stored measurement data and handling anomalies.
Connecting Instrument to PC
Steps for transferring data from the instrument to a computer.
INSTRUMENT MAINTENANCE AND SPECIFICATIONS
General Maintenance and Battery Replacement
Guidelines for instrument care, cleaning, and battery replacement.
Technical Specifications Overview
Detailed technical data, ranges, resolutions, and uncertainties for measurements.
SPECIFICATIONS: STANDARDS, ENVIRONMENT, ACCESSORIES
Reference Standards and Environmental Conditions
Standards for verification, operating limits, and accessory information.
SERVICE AND WARRANTY INFORMATION
Warranty Terms and Service Procedures
Details on product warranty, coverage, and steps for instrument service.
PRACTICAL TESTS: CONDUCTOR CONTINUITY AND INSULATION
Continuity Measurement on Protective Conductors
Procedures for checking conductor continuity, purpose, parts, and allowable values.
Insulation Resistance and Circuit Separation Tests
Insulation test purpose and circuit separation checks, including definitions.
RCD TESTS: ALLOWABLE VALUES AND TRIPPING CURRENT
RCD Working Test Procedures and Values
RCD testing procedures, allowable values, and installation parts to check.
RCD Tripping Current Test
Checking the actual tripping current of RCDs, purpose, and allowable values.
SHORT-CIRCUIT IMPEDANCE, FAULT LOOP, AND EARTH RESISTANCE TESTS
Short-Circuit Impedance Measurement
Purpose, installation parts, and allowable values for impedance testing.
Fault Loop Impedance and Earth Resistance
Understanding fault loop composition and earth resistance measurements.
HARMONICS ANALYSIS AND POWER FACTOR
Voltage and Current Harmonics
Explanation of harmonic distortion, limits, causes, and consequences.
Power and Power Factor Definitions
Definitions of power types, power factor, and related conventions.
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