User Manual
HT79
EN - 1
Table of contents:
1. PRECAUTIONS AND SAFETY MEASURES ............................................................... 2
1.1. Preliminary instructions ..................................................................................................... 2
1.2. During use ......................................................................................................................... 3
1.3. After use ............................................................................................................................ 3
1.4. Definition of Measurement (Overvoltage) category ........................................................... 3
2. GENERAL DESCRIPTION ........................................................................................... 4
2.1. Measuring average values and TRMS values .................................................................. 4
2.2. Definition of true root mean square value and crest factor ................................................ 4
3. PREPARATION FOR USE ........................................................................................... 5
3.1. Initial checks ...................................................................................................................... 5
3.2. Instrument power supply ................................................................................................... 5
3.3. Storage .............................................................................................................................. 5
4. NOMENCLATURE ........................................................................................................ 6
4.1. Description of the instrument ............................................................................................. 6
4.1.1. Hand protection .......................................................................................................................... 6
4.2. Description of the symbols shown on the display .............................................................. 7
4.3. Description of function keys .............................................................................................. 7
4.3.1. HOLD key ................................................................................................................................... 7
4.3.2. MIN/MAX key .............................................................................................................................. 7
4.3.3. ZERO key ................................................................................................................................... 7
4.3.4. Key
........................................................................................................................................ 7
4.3.5. Auto Power OFF function ........................................................................................................... 7
5. OPERATING INSTRUCTIONS ..................................................................................... 8
5.1. DC Voltage measurement ................................................................................................. 8
5.2. AC Voltage measurement ................................................................................................. 9
5.3. Resistance measurement ................................................................................................ 10
5.4. Continuity test.................................................................................................................. 11
5.5. DC Current measurement ............................................................................................... 12
5.6. AC Current measurement ............................................................................................... 13
5.7. AC/DC leakage current measurement ............................................................................ 14
6. MAINTENANCE ......................................................................................................... 15
6.1. General information ......................................................................................................... 15
6.2. Replacing the batteries .................................................................................................... 15
6.3. Cleaning the instrument .................................................................................................. 15
6.4. End of life ........................................................................................................................ 15
7. TECHNICAL SPECIFICATIONS ................................................................................ 16
7.1. Technical characteristics ................................................................................................. 16
7.1.1. Electrical characteristics ........................................................................................................... 16
7.1.2. Reference standards ................................................................................................................ 16
7.1.3. General characteristics ............................................................................................................. 17
7.2. Environment .................................................................................................................... 17
7.2.1. Environmental conditions for use ............................................................................................. 17
7.3. Accessories ..................................................................................................................... 17
7.3.1. Accessories provided ............................................................................................................... 17
8. ASSISTANCE ............................................................................................................. 18
8.1. Warranty conditions ......................................................................................................... 18
8.2. Assistance ....................................................................................................................... 18