User guide
HT4020 - HT4022
EN - 1
Table of Contents:
1. SAFETY PRECAUTIONS AND PROCEDURES ............................................................. 2
1.1. Preliminary instructions ..................................................................................................... 2
1.2. During use ......................................................................................................................... 3
1.3. After use ............................................................................................................................ 3
1.4. Definition of measuring (overvoltage) category ................................................................. 3
2. GENERAL DESCRIPTION .............................................................................................. 4
3. PREPARATION FOR USE .............................................................................................. 4
3.1. Preliminary checks ............................................................................................................ 4
3.2. Power supply ..................................................................................................................... 4
3.3. Calibration ......................................................................................................................... 4
3.4. Storage .............................................................................................................................. 4
4. OPERATING INSTRUCTIONS ........................................................................................ 5
4.1. Instrument description ....................................................................................................... 5
4.1.1. Controls description ..................................................................................................................... 5
4.1.2. Alignment marks .......................................................................................................................... 5
4.1.3. Rubber cap use to hold test leads ............................................................................................... 6
4.1.4. Disable Auto Power OFF function ............................................................................................... 6
4.2. Description of function keys .............................................................................................. 7
4.2.1. D-H/ key .................................................................................................................................. 7
4.2.2. FUNC and FUNC/HARM key ............................................................................................ 7
4.2.3. MAX/MIN/PK and MAX/MIN/PK/H key ...................................................................................... 7
4.2.4. ENERGY and ENERGY/H key .................................................................................................. 7
4.3. Operating instructions ....................................................................................................... 8
4.3.1. AC/DC Voltage measurement ..................................................................................................... 8
4.3.2. AC Voltage frequency measurement ........................................................................................... 9
4.3.3. Measurement of Voltage Harmonics (HT4022) ......................................................................... 10
4.3.4. Resistance and continuity test ................................................................................................... 11
4.3.5. AC Current measurement .......................................................................................................... 12
4.3.6. AC Frequency current measurement ......................................................................................... 13
4.3.7. Measurement of Current Harmonics (HT4022) ......................................................................... 14
4.3.8. Power/Energy measurement on single phase system .............................................................. 15
4.3.9. Power/Energy measurement on three phase balanced system ................................................ 16
4.3.10. Detection of phase sequence indication with 1 wire method ..................................................... 17
4.3.10.1. Detection of phase coincidence with 1 wire method ................................................................ 19
4.3.10.2. Phase detection with 1 wire method ........................................................................................ 21
5. MAINTENANCE ............................................................................................................ 22
5.1. General information ......................................................................................................... 22
5.2. Battery replacement ........................................................................................................ 22
5.3. Cleaning .......................................................................................................................... 22
5.4. End of life ........................................................................................................................ 22
6. TECHNICAL SPECIFICATIONS ................................................................................... 23
6.1. Technical characteristics ................................................................................................. 23
6.1.1. Reference standards .................................................................................................................. 24
6.2. General specifications ..................................................................................................... 24
6.3. Environmental conditions ................................................................................................ 24
6.3.1. Climatic conditions ..................................................................................................................... 24
6.4. Accessories ..................................................................................................................... 24
6.4.1. Standard accessories ................................................................................................................ 24
7. SERVICE ....................................................................................................................... 25
7.1. Warranty conditions ......................................................................................................... 25
7.2. After-sale service ............................................................................................................. 25
8. APPENDIX: VOLTAGE AND CURRENT HARMONICS ................................................ 26
8.1. Theory ............................................................................................................................. 26
8.2. Limit values for harmonics ............................................................................................... 27
8.3. Causes for the presence of harmonics ............................................................................ 27
8.4. Consequences of the presence of harmonics ................................................................. 28