Tonghui TH1942, Operation Manual

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Contents
Chapter 1 General Information
............................................................................................................................. 7
1.1 Feature Overview......................................................................................................................................... 7
1.2 Operating Environment ............................................................................................................................... 7
1.3 Dimensions and Weight ............................................................................................................................... 7
1.4 Safety symbols and Precautions .................................................................................................................. 8
1.5 Incoming Inspection .................................................................................................................................... 8
1.6 Warranty....................................................................................................................................................... 9
1.7 Limitation of Warranty ................................................................................................................................ 9
Chapter 2 TH1942 Overview ............................................................................................................................... 10
2.1 Front Panel Summary ................................................................................................................................ 10
2.2 Annunciators on Screen ..............................................................................................................................11
2.3 Front Panel Menu Reference ..................................................................................................................... 12
2.4 Front Panel Menu Overview ...................................................................................................................... 13
2.5 Rear Panel Summary ................................................................................................................................. 14
2.6 Power up .................................................................................................................................................... 15
2.6.1 Power Line Connection
.............................................................................................................. 15
2.6.2 Input Terminals ............................................................................................................................ 15
2.6.3 Power-up Sequence
................................................................................................................... 16
2.6.4 High Energy Circuit Safety Precautions .................................................................................. 16
2.6.5 Power-on Defaults
....................................................................................................................... 17
2.6.6 Warm-up time
.............................................................................................................................. 17
2.7 Display ....................................................................................................................................................... 17
Chapter 3 Basic Measurements
......................................................................................................................... 18
3.1 Preparation ................................................................................................................................................. 18
3.2 Measuring Voltage ..................................................................................................................................... 18
3.2.1 Connections ................................................................................................................................. 18
3.3 Measuring Current ..................................................................................................................................... 19
3.3.1 Connections
................................................................................................................................. 19
3.3.2 Front Panel Fuse Replacement ................................................................................................ 21
3.4 Measuring Resistance ................................................................................................................................ 22
3.4.1 Connections ................................................................................................................................. 22
3.4.2 Shielding ....................................................................................................................................... 22
3.5 Measuring Frequency and Period .............................................................................................................. 23
3.5.1 Trigger Level and Measurement Errors ................................................................................... 23
3.5.2 Gate Time
..................................................................................................................................... 23
3.5.3 Connections ................................................................................................................................. 23
3.6 Measuring Continuity ................................................................................................................................ 24
3.6.1 Connections
................................................................................................................................. 24
3.7 Testing Diode ............................................................................................................................................. 25
3.7.1 Connections
................................................................................................................................. 25
3.8 Measuring True RMS AC+DC .................................................................................................................. 26
3.8.1 Connections
................................................................................................................................. 26