HT instruments HT401 User 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