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CONTENTS CONTENTS

1. Safety Information.............................1

1.1 Preliminary...............................................1

1.2 During Use...............................................2

1.3 Symbols...................................................3

1.4 Maintenance............................................4

2. Description........................................4

2.1 Names Of Parts........................................5

2.2 Switch, Buttons And Input Jacks...............7

2.3 LCD (Liquid-Crystal Display)....................7

3. Specifications...................................9

3.1 General Specifications.............................9

3.2 Technical Specifications.........................10

4. Operation Instruction......................15

4.1 Holding Readings...................................15

4.2 Switching REL........................................15

4.3 Switching Frequency Or Duty..................16

4.4 Switching Manualrange

Or Auto Range ..................................16

4.5 Switching Functions.................................17

4.6 Back Light And Clamp Lighting Bulb..........17

4.7 Auto Power Off.........................................18

4.8 Preparing For Measurement.....................18

4.9 Measuring AC Current .............................19

4.10 Measuring DC Current ...........................20

4.11 Measuring AC Voltage ............................21

4.12 Measuring DC Voltage ...........................21

4.13 Measuring Frequency ............................22

4.14 Measuring Duty .....................................24

4.15 Measuring Resistance............................27

4.16 Testing Diode.........................................28

4.17 Testing Continuity...................................29

4.18 Measuring Capacitance .........................29

5. Maintenance......................................30

5.1 Replacing The Batteries............................30

5.2 Replacing Test Leads ...............................31

6. Accessories.......................................31

Mastech MS2138/R User Manual

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