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HT 400 Series User Manual

HT 400 Series
88 pages
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Copyright HT ITALIA 2014 Release EN 2.02 - 24/09/2014
400 Series
User manual

Table of Contents

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HT 400 Series Specifications

General IconGeneral
TypeDigital Multimeter
Diode TestYes
Auto RangingYes
Data HoldYes
Operating Temperature0°C to 40°C
DC Current Range400μA to 10A
AC Current Range400μA to 10A
Resistance Range400Ω to 40MΩ
Continuity TestYes
DisplayLCD, 4000 counts
Measurement RangeAs per individual functions

Summary

1. Safety Precautions and Procedures

1.1. Preliminary Instructions

Instructions for safe and correct initial setup and usage of the instrument.

1.2. During Use

Recommendations for safe operation of the instrument during measurements.

1.3. After Use

Procedures for safely turning off and storing the instrument after use.

1.4. Overvoltage Categories

Definitions and explanations of measurement categories for electrical safety.

2. General Description

2.1. Introduction

Overview of the instrument models and their measuring functions.

2.2. Instrument Operation

Details on the tests and functions the instrument can perform.

3. Preparation for Use

3.1. Initial Checks

Steps to verify the instrument's condition and package contents before first use.

3.2. Instrument Power Supply

Information on battery type, replacement, and power management features.

3.3. Calibration

Details on instrument calibration and warranty period.

3.4. Storage

Guidelines for proper storage to ensure measurement accuracy.

4. Nomenclature

4.1. Instrument Description

Identification and description of the instrument's front panel and connectors.

4.3. Keyboard Description

Explanation of the functions of each key on the instrument's keyboard.

5. Main Menu

5.1. AUTO + PWR

Accessing measurement functions like AUTO and POWER via the main menu.

5.2. Set - Instrument Settings

Configuration options for language, auto power off, voltage, frequency, and system.

5.3. Memory Management

Accessing and managing saved measurements and memory locations.

6. Operating Instructions

6.1. AUTO Function

Performing an automatic sequence of tests for electrical safety.

6.1.1. Anomalous Results in AUTO Mode

Interpreting and handling abnormal readings during AUTO function tests.

6.2. LOWOHM: Continuity Test

Performing continuity tests of earth and equipotential conductors with 200mA.

6.2.1. CAL Mode

Procedure for calibrating test leads to compensate for cable resistance.

6.2.2. Description of Anomalous Results

Interpreting and handling abnormal continuity test results.

6.3. MΩ: Insulation Resistance Measurement

Measuring insulation resistance between active conductors and earth.

6.3.1. Description of Anomalous Results

Interpreting and handling abnormal insulation resistance test results.

6.4. RCD: Test on A-type and AC-type RCDs

Testing tripping time and current of RCDs for A and AC types.

6.4.1. AUTO Mode

Performing an automatic sequence of RCD tests with nominal current.

6.4.2. x1/2 Mode

Measuring RCD tripping time with half nominal current.

6.4.3. x1, x2, x5 Mode

Measuring RCD tripping time at 1x, 2x, and 5x nominal current.

6.4.4. Mode

Detecting tripping time at tripping current (lower than nominal).

6.4.5. RA Mode

Measuring contact voltage and total earth resistance without tripping RCD.

6.4.6. Description of Anomalous Results

Interpreting and handling abnormal RCD test results.

6.5. LOOP: Measurement of Line/Loop Impedance

Measuring line and fault loop impedance and calculating prospective fault current.

6.5.1. P-N Mode

Measuring impedance between phase and neutral conductors.

6.5.2. P-P Mode

Measuring impedance between two phase conductors.

6.5.3. P-PE Mode in TT or TN Systems

Measuring fault loop impedance in TT or TN systems.

6.5.4. P-PE Mode in IT Systems

Measuring fault loop impedance in IT systems.

6.5.5. Description of Anomalous Results

Interpreting and handling abnormal loop impedance test results.

6.6. RA: Measurement of Total Earth Resistance

Measuring total earth resistance through the socket-outlet.

6.6.1. Description of Anomalous Results

Interpreting and handling abnormal earth resistance test results.

6.7. 123: Phase Sequence Test

Testing the phase sequence by direct contact with live parts.

6.7.1. Description of Anomalous Results

Interpreting and handling incorrect phase sequence detection.

6.8. AUX: Environmental Parameters Measurement

Measuring environmental parameters using external transducers.

6.8.1. AIR, RH, TMP °F, TMP °C, Lux Mode

Using specific modes for measuring air, humidity, temperature, and light.

6.8.2. Description of Anomalous Results

Interpreting and handling anomalous environmental measurement results.

6.9. LEAK: Leakage Current Measurement

Measuring leakage current in real time using an external clamp.

6.9.1. Description of Anomalous Results

Interpreting and handling anomalous leakage current readings.

7. Mains Analysis

7.1. PWR: Mains Parameters Measurement

Measuring mains voltage, current, and harmonic parameters.

7.1.1. PAR Mode

Measuring electrical parameters like voltage, current, power, and power factor.

8. Memory

8.1. How to Save a Measure

Procedure for saving measured data, including parameter settings.

8.2. Saved Data Management

Navigating and managing stored measurements using REC, PAG, and CANC functions.

9. Connecting the Instrument to the PC

9.1. Connecting to PC

Procedure for connecting the instrument to a PC for data transfer.

10. Maintenance

10.2. Battery Replacement

Procedure for replacing the instrument's batteries safely.

10.3. Instrument Cleaning

Instructions for cleaning the instrument using a dry, soft cloth.

11. Specifications

11.1. Technical Features

Detailed technical specifications and accuracy for various measurement functions.

11.2. Reference Guidelines

List of relevant safety and measurement standards applied to the instrument.

11.3. General Characteristics

Mechanical data, power supply, display, and memory specifications.

11.4. Environment

Environmental conditions for operation and storage.

11.5. Accessories

List of accessories provided with the instrument.

12. Service

12.1. Warranty Conditions

Terms and conditions of the instrument's warranty and exclusions.

12.2. Service

Troubleshooting steps and return procedures for service.

13. Practical Reports for Electrical Tests

13.1. Continuity Measurement on Protective Conductors

Testing continuity of protective and equipotential conductors.

13.2. Insulation Resistance Measurement

Checking installation insulation resistance against standards.

13.3. Check of the Circuit Separation

Verifying insulation resistance for SELV, PELV, and electrical separation.

13.4. Working Test of RCDs

Checking the proper installation and adjustment of general and selective RCDs.

13.5. Test of RCD Tripping Current

Checking the real tripping current of general RCDs.

13.6. Measurement of Short-Circuit Impedance

Checking tripping power against maximum fault current.

13.7. Fault Loop Impedance Measurement

Measuring fault loop impedance and detecting prospective fault current.

13.8. Earth Resistance Measurement in TT Systems

Checking RCD coordination with earth resistance value.

13.9. Voltage and Current Harmonics

Theory and analysis of voltage and current harmonics in electrical systems.

13.10. Power and Power Factor Definition

Definitions and formulas for active, reactive, and apparent power and power factor.

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