HT instruments HT712 User Manual
Page 2
HT712
EN - 1
Content
:
1.
SAFETY PRECAUTIONS AND PROCEDURES ...................................................................... 2
1.1.
Preliminary ........................................................................................................................ 2
1.2.
During use ......................................................................................................................... 3
1.3.
After use ............................................................................................................................ 3
1.4.
Overvoltage categories - definitions .................................................................................. 3
2.
GENERAL DESCRIPTION ....................................................................................................... 4
2.1.
TRMS VALUE and MEAN VALUE - DEFINITIONS .......................................................... 4
2.2.
TRUE ROOT MEAN SQUARE VALUE and CREST FACTOR - definitions ..................... 4
3.
PREPARATION TO USE .......................................................................................................... 5
3.1.
Initial .................................................................................................................................. 5
3.2.
Supply voltage ................................................................................................................... 5
3.3.
Calibration ......................................................................................................................... 5
3.4.
Storage .............................................................................................................................. 5
4.
OPERATING INSTRUCTIONS ................................................................................................. 6
4.1.
Instrument - description ..................................................................................................... 6
4.1.1.
Front panel .................................................................................................................................. 6
4.2.
Function keys .................................................................................................................... 6
4.2.1.
HOLD .......................................................................................................................................... 6
4.2.2.
DISP ........................................................................................................................................... 6
4.2.3.
MEAS .......................................................................................................................................... 6
4.3.
Special functions ............................................................................................................... 6
4.3.1.
Turning on ................................................................................................................................... 6
4.3.2.
Auto power off ............................................................................................................................ 6
4.4.
Measurements - description .............................................................................................. 7
4.4.1.
DC voltage measurement ........................................................................................................... 7
4.4.2.
AC voltage and frequency measurement with 2 test leads ........................................................ 8
4.4.3.
AC voltage and frequency measurement with 1 test leads ........................................................ 9
4.4.4.
Phase sequence test and phase conformity test ...................................................................... 10
4.4.5.
Resistance measurement and continuity test ........................................................................... 12
5.
MAINTENANCE ...................................................................................................................... 13
5.1.
General information ......................................................................................................... 13
5.2.
Battery replacement ........................................................................................................ 13
5.3.
Cleaning .......................................................................................................................... 13
5.4.
End of life ........................................................................................................................ 13
6.
TECHNICAL SPECIFICATIONS ............................................................................................. 14
6.1.
Technical features ........................................................................................................... 14
6.1.1.
Electrical ................................................................................................................................... 15
6.1.2.
Safety ........................................................................................................................................ 15
6.1.3.
General data ............................................................................................................................. 15
6.2.
Environment .................................................................................................................... 15
6.2.1.
Environmental conditions ......................................................................................................... 15
6.3.
Accessories ..................................................................................................................... 15
6.3.1.
Standard accessories ............................................................................................................... 15
7.
SERVICE ................................................................................................................................ 16
7.1.
Warranty conditions ......................................................................................................... 16
7.2.
Service ............................................................................................................................ 16