HT instruments HT401 - Manual (Page 2)

HT401
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. Calibration ......................................................................................................................... 5
3.4. Storage .............................................................................................................................. 5
4. OPERATING INSTRUCTIONS ..................................................................................... 6
4.1. Instrument description ....................................................................................................... 6
4.1.1. Description of the controls ................................................................................................................. 6
4.2. Description of function keys .............................................................................................. 7
4.2.1. RANGE key ....................................................................................................................................... 7
4.2.2. VoltSense key .................................................................................................................................... 7
4.2.3. MIN MAX key ..................................................................................................................................... 7
4.2.4. SMART HOLD key ............................................................................................................................. 7
4.2.5. Backlight key ............................................................................................................................... 7
4.2.6. MODE key ......................................................................................................................................... 7
4.3. Internal modes of instrument ............................................................................................. 8
4.3.1. PEAK/HOLD mode ............................................................................................................................ 8
4.3.2. AC+DC mode ..................................................................................................................................... 8
4.3.3. AutoV LoZ mode ................................................................................................................................ 8
4.3.4. Disabling the Auto Power OFF function ............................................................................................. 8
4.3.5. Wrong insertion indication ................................................................................................................. 8
4.4. Operating instructions ....................................................................................................... 9
4.4.1. DC Voltage measurement ................................................................................................................. 9
4.4.2. AC Voltage measurement and Frequency ....................................................................................... 10
4.4.3. AC Voltage measurement with low input impedance ...................................................................... 11
4.4.4. DC Current measurement ................................................................................................................ 12
4.4.5. AC Current measurement and Frequency ....................................................................................... 13
4.4.6. Resistance measurement ................................................................................................................ 14
4.4.7. Diode and Continuity test ................................................................................................................. 15
4.4.8. Capacitance measurement .............................................................................................................. 16
4.4.9. Temperature measurement ............................................................................................................. 17
5. MAINTENANCE ......................................................................................................... 18
5.1. Battery and fuses replacement ........................................................................................ 18
5.2. Cleaning the instrument .................................................................................................. 18
5.3. End of life ........................................................................................................................ 18
6. TECHNICAL SPECIFICATIONS ................................................................................ 19
6.1. Technical characteristics ................................................................................................. 19
6.1.1. Electrical characteristics .................................................................................................................. 21
6.1.2. Reference standards ....................................................................................................................... 21
6.1.3. General characteristics .................................................................................................................... 21
6.2. Environment .................................................................................................................... 22
6.2.1. Environmental conditions for use ..................................................................................................... 22
6.3. Accessories ..................................................................................................................... 22
6.3.1. Standard accessories ...................................................................................................................... 22
6.3.2. Optional accessories ....................................................................................................................... 22
7. SERVICE .................................................................................................................... 23
7.1. Warranty conditions ......................................................................................................... 23
7.2. Service ............................................................................................................................ 23