HT instruments HT21 User Manual
Page 2
HT21
EN - 1
Table of Content:
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.
Hz% key ...................................................................................................................................... 6
4.2.3.
REL key ...................................................................................................................................... 6
4.2.4.
MODE key .................................................................................................................................. 6
4.2.5.
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 and Continuity Test measurements ......................................................................... 9
4.3.4.
Diode test.................................................................................................................................. 10
4.3.5.
Frequency and Duty Cycle measurements .............................................................................. 11
4.3.6.
Capacitance measurement ...................................................................................................... 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.
Safety ........................................................................................................................................ 15
6.1.2.
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.
After-sale service............................................................................................................. 16