Table Of Contents - Extech Instruments EX820A User Manual

Table of contents

1 Introduction........................................................................1
2 Safety ................................................................................2
2.1 Safety Notes.............................................................. 2
2.2 International Safety Symbols ......................................... 2
2.3 Maximum Input Ranges ............................................... 4
2.4 FCC Compliance ........................................................ 4
3 Product Description ............................................................5
3.1 Meter Front ............................................................... 5
3.2 Meter Back ............................................................... 6
3.3 Button Descriptions..................................................... 7
3.4 Display Icon Descriptions ............................................. 7
4 Meter Power .......................................................................8
4.1 Automatic Power Off (APO)........................................... 8
5 Operation ...........................................................................9
5.1 Automatic and Manual Range ....................................... 9
5.2 LCD Backlight............................................................ 9
5.3 Maximum and Minimum Readings.................................. 9
5.4 Data Hold ................................................................. 9
5.5 AC Current Clamp Measurements ................................ 10
5.5.1
5.5.2
5.5.3
5.6 AC/DC Voltage and LoZ Measurements......................... 12
5.6.1
5.6.2
5.7 Resistance Measurements ......................................... 14
5.8 Continuity Test ......................................................... 15
5.9 Diode Test............................................................... 16
5.10 Capacitance Measurements ....................................... 18
5.11 Type K Thermocouple Temperature
Measurements ......................................................... 19
5.12 Non-Contact IR Temperature Measurements .................. 20
5.12.1 Distance to Spot Ratio .................................... 20
5.12.2 IR Measurement Considerations ....................... 21
6 Maintenance ..................................................................... 22
6.1 Cleaning and Storage ................................................ 22
#NAS100175; r. AA/97099/97616; en-US
Polarity Considerations ................................... 10
Peak Max and Peak Min .................................. 10
Inrush AC Current Measurements...................... 11
Peak Max and Peak Min .................................. 13
Low Pass Filter Function .................................. 13
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