HT instruments HT322 User Manual
Page 2
HT321 - HT322
EN - 1
Table of contents:
1.
SAFETY PRECAUTIONS AND PROCEDURES .......................................................... 2
1.1.
Preliminary ........................................................................................................................ 2
1.2.
During use ......................................................................................................................... 3
1.3.
After use ............................................................................................................................ 3
1.4.
Measuring (overvoltage) categories definitions ................................................................. 3
2.
GENERAL DESCRIPTION ........................................................................................... 4
3.
PREPARATION FOR USE ........................................................................................... 4
3.1.
Initial .................................................................................................................................. 4
3.2.
Supply voltage ................................................................................................................... 4
3.3.
Calibration ......................................................................................................................... 4
3.4.
Storage .............................................................................................................................. 4
4.
OPERATING INSTRUCTIONS ..................................................................................... 5
4.1.
Instrument description ....................................................................................................... 5
4.1.1.
Front panel description ............................................................................................................... 5
4.2.
Description of function keys .............................................................................................. 6
4.2.1.
HOLD Key................................................................................................................................... 6
4.2.2.
R (RANGE) Key .......................................................................................................................... 6
4.2.3.
MAX Key ..................................................................................................................................... 6
4.2.4.
SEL Key ...................................................................................................................................... 6
4.2.5.
Backlight
key (only HT322) ................................................................................................. 6
4.2.6.
Auto Power OFF ......................................................................................................................... 6
4.3.
Measurements ................................................................................................................... 7
4.3.1.
DC Voltage measurement .......................................................................................................... 7
4.3.2.
AC Voltage measurement .......................................................................................................... 8
4.3.3.
Resistance measurement ........................................................................................................... 9
4.3.4.
Diode test and Continuity test .................................................................................................. 10
4.3.5.
Temperature measurement (only HT322) ................................................................................ 11
5.
MAINTENANCE .......................................................................................................... 12
5.1.
General information ......................................................................................................... 12
5.2.
Battery replacement ........................................................................................................ 12
5.3.
Cleaning .......................................................................................................................... 12
5.4.
End of life ........................................................................................................................ 12
6.
TECHNICAL SPECIFICATIONS ................................................................................. 13
6.1.
Technical features ........................................................................................................... 13
6.1.1.
Safety ........................................................................................................................................ 14
6.1.2.
General data ............................................................................................................................. 14
6.2.
Environment .................................................................................................................... 14
6.2.1.
Environmental conditions ......................................................................................................... 14
6.3.
Accessories ..................................................................................................................... 14
6.3.1.
Standard accessories ............................................................................................................... 14
6.3.2.
Optional accessories ................................................................................................................ 14
7.
SERVICE .................................................................................................................... 15
7.1.
Warranty conditions......................................................................................................... 15
7.2.
After-sale service............................................................................................................. 15