FLUKE Model 187 & 189 True RMS Multimeter Users Manual

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Model 187 & 189
Users Manual Selecting the Range....................................................................................................... Understanding the Display ............................................................................................. Primary Display ......................................................................................................... Secondary Display..................................................................................................... Bar Graph.................................................................................................................. Using the Input Terminals .............................................................................................. Using Display Hold ......................................................................................................... Using AutoHOLD............................................................................................................ Using MIN MAX....................
.......................................................................................... Using FAST MN MX ....................................................................................................... Using HOLD with MIN MAX or FAST MN MX............................................................ Using Relative Mode (REL)............................................................................................ 3 2-10 2-10 2-10 2-11 2-11 2-17 2-18 2-19 2-19 2-21 2-22 2-22

Making Measurements................................................................................................. 3-1 Introduction .................................................................................................................... Measuring Voltage ......................................................................................................... Measuring AC Voltage............................................................................................... dB Measurements in AC Volts Functions .................................................................. Measuring DC Voltage .............................................................................................. Both AC and DC Voltage Measurements .................................................................. Measuring Resistance.................................................................................................... Testing for Continuity ................................................................
..................................... Using Conductance for High Resistance Tests .............................................................. Measuring Capacitance.................................................................................................. Testing Diodes ............................................................................................................... Measuring Temperature ................................................................................................. Measuring Current ......................................................................................................... Input AlertTM Feature ................................................................................................. 3-1 3-1 3-2 3-3 3-4 3-4 3-6 3-8 3-9 3-12 3-13 3-15 3-16 3-17

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Contents (continued)
Measuring AC Current .............................................................................................. Measuring DC Current .............................................................................................. Measuring Frequency .................................................................................................... Measuring Duty Cycle.................................................................................................... Measuring Pulse Width.................................................................................................. 4 3-18 3-20 3-22 3-23 3-25

Using Memory & Communications Features ............................................................ 4-1 Introduction.................................................................................................................... Types of Memory ........................................................................................................... Saved Readings Memory.......................................................................................... Logged Readings Memory........................................................................................ Storing Saved Readings ................................................................................................ Starting Logging ............................................................................................................ Stopping Logging........................................................................................................... Viewing Memory Data......................................................
.............................................. Clearing Memory ........................................................................................................... Using Communications (187 and 189) .......................................................................... 4-1 4-1 4-1 4-1 4-2 4-2 4-2 4-3 4-5 4-5

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Changing the Default Settings ................................................................................... 5-1 Introduction.................................................................................................................... Selecting Setup Options ................................................................................................ Adjusting the Temperature Offset.................................................................................. Selecting Display Resolution (3 1/2 or 4 1/2 Digits)...................................................... Setting the Power Off Timeout....................................................................................... Setting the 24-Hour Clock.............................................................................................. Setting the Line (Main) Frequency................................................................................. Returning to Factory Defaults ...................................................
..................................... Saving Setup Options .................................................................................................... 5-1 5-1 5-4 5-6 5-6 5-7 5-7 5-8 5-8

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Model 187 & 189
Users Manual 6 Maintenance ................................................................................................................. 6-1 Introduction .................................................................................................................... General Maintenance..................................................................................................... Testing the Fuses........................................................................................................... Replacing the Batteries .................................................................................................. Replacing the Fuses ...................................................................................................... User-Replaceable Parts ................................................................................................. In Case of Difficulty ........................................................................................................ 7 6-1 6-
1 6-1 6-3 6-5 6-5 6-5

Specifications............................................................................................................... 7-1 Safety and Compliances ................................................................................................ Physical Specifications................................................................................................... Feature Summary........................................................................................................... Basic Specifications ....................................................................................................... Detailed Accuracy Specifications ................................................................................... Frequency Counter Sensitivity ....................................................................................... Burden Voltage (A, mA, µA) ........................................................................................... Input Characteristics...........................
............................................................................ 7-1 7-2 7-3 7-4 7-5 7-11 7-11 7-12

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