Bedienungsanleitung Gossen Metrawatt METRAHIT T-COM (Seite 6 von 72) (Englisch)

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6 GMC-I Messtechnik GmbH

Table of Contents

Contents Page Contents Page

1 Safety Features and Precautions ....................................... 8

1.1 Use for Intended Purpose ................................................................10

1.2 Meanings of Danger Symbols ..........................................................10

1.3 Meanings of Acoustic Warning Signals ............................................10

Operating Overview – Connections, Keys, Rotary Switch,

Symbols

.......................................................................... 12

3 Initial Start-Up .................................................................. 16

3.1 Batteries ........................................................................................16

3.2 Activation .......................................................................................16

3.3 Setting the Operating Parameters ....................................................16

3.4 Switching the Instrument Off ...........................................................17

4 Control Functions ............................................................. 18

4.1 Selecting Measuring Functions and Measuring Ranges .....................18

4.1.1 Automatic Range Selection .............................................................18

4.1.2 Manual Measuring Range Selection .................................................18

4.1.3 Quick Measurements ......................................................................19

4.2 Zero Offset / Relative Measurements ...............................................19

4.3 Display (LCD) .................................................................................20

4.3.1 Digital Display ................................................................................20

4.3.2 Analog Display ...............................................................................20

4.4 Measured Value Storage: DATA (auto-hold / compare) ......................21

4.4.1 Saving Minimum and Maximum Values – MIN/MAX Function ............22

4.5 Measurement Data Recording .........................................................23

5 Measurements ................................................................. 26

5.1 Voltage Measurement ....................................................................26

5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC) .....27

5.1.2 Alternating Voltage and Frequency Measurement V AC and Hz

with Selectable Low-Pass Filter .......................................................28

5.1.3 Transient Overvoltages ...................................................................30

5.1.4 Voltage Measurements at Above 600 V ...........................................30

5.2 Resistance Measurement, Ω ........................................................31

5.3 Temperature Measurement – Temp RTD .........................................32

5.3.1 Measurement with Resistance Thermometers ..................................32

5.4 “R

” Loop Impedance Measurement with 2 mA Constant Current ....34

5.5 Continuity Test ..............................................................................35

5.6 Diode Testing with 2 mA Constant Current .....................................36

5.7 Capacitance Measurement ............................................................38

5.7.1 Cable Length Measurement m ........................................................38

5.8 Insulation Resistance Measurement:

in Telecommunications Networks – MΩISO Function .......................39

5.8.1 Connecting the Measurement Cables ..............................................40

5.8.2 Detection of Interference Voltages ...................................................40

5.8.3 Performing Insulation Resistance Measurements ..............................40

5.8.4 Ending the Measurement and Discharging .......................................42

5.9 Current Measurement ....................................................................43

5.9.1 Direct and Pulsating Current Measurement, Direct Connection,

A DC and A (DC+AC) ......................................................................44

5.9.2 Alternating Current and Frequency Measurement,

Direct Connection, A AC and Hz ......................................................45

5.9.3 Direct and Pulsating Current Measurement

with Clip-On Current Sensor, A DC and A (DC+AC) ..........................46

5.9.4 Alternating Current Measurement with Clip-On Current Sensor,

A AC and Hz ..................................................................................47

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