HT HT21 User Manual

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

HT HT21 Specifications

General

Brand	HT
Model	HT21
Category	Multimeter
Language	English