HT instruments HT9021 - Manual (Page 2)

HT9021
EN - 1
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
2.1. TRMS and Mean value measuring instruments ................................................................ 4
2.2. True Root Mean Square value and Crest Factor definitions ............................................. 4
3. PREPARATION FOR USE ........................................................................................... 5
3.1. Initial .................................................................................................................................. 5
3.2. Power supply ..................................................................................................................... 5
3.3. Calibration ......................................................................................................................... 5
3.4. Storage .............................................................................................................................. 5
4. OPERATING INSTRUCTIONS ..................................................................................... 6
4.1. Instrument description ....................................................................................................... 6
4.1.1. Command description ................................................................................................................. 6
4.1.2. Alignment marks ......................................................................................................................... 6
4.2. Function key description .................................................................................................... 7
4.2.1. H key ........................................................................................................................................... 7
4.2.2. key ........................................................................................................................................ 7
4.2.3. MODE key .................................................................................................................................. 7
4.2.4. MAX/MIN key .............................................................................................................................. 7
4.2.5. Hz% key ...................................................................................................................................... 7
4.2.6. PEAK/REL key ........................................................................................................................... 7
4.3. Functions of rotary switch description ............................................................................... 8
4.3.1. AC Voltage measurement .......................................................................................................... 8
4.3.2. DC Voltage measurement .......................................................................................................... 9
4.3.3. Resistance measurement ......................................................................................................... 10
4.3.4. Continuity test and Diode test ................................................................................................... 10
4.3.5. Capacitance measurement ....................................................................................................... 12
4.3.6. Temperature measurement ...................................................................................................... 13
4.3.7. AC and DC Current measurement ........................................................................................... 14
4.3.8. Frequency and Duty cycle measurement ................................................................................. 14
5. MAINTENANCE ......................................................................................................... 16
5.1. General informations ....................................................................................................... 16
5.2. Battery replacement ........................................................................................................ 16
5.3. Cleaning .......................................................................................................................... 16
5.4. End of life ........................................................................................................................ 16
6. TECHNICAL SPECIFICATIONS ................................................................................ 17
6.1. Characteristics ................................................................................................................. 17
6.1.1. Safety ........................................................................................................................................ 18
6.1.2. General data ............................................................................................................................. 18
6.2. Environmental conditions ................................................................................................ 19
6.2.1. Climatic conditions .................................................................................................................... 19
6.3. Standard accessories ...................................................................................................... 19
6.4. Optional accessories ....................................................................................................... 19
7. SERVICE .................................................................................................................... 20
7.1. Warranty conditions ......................................................................................................... 20
7.2. Service ............................................................................................................................ 20