Fluke 187 user manual Detailed Accuracy Specifications

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Specifications

7

Detailed Accuracy Specifications

Detailed Accuracy Specifications

Accuracy is specified for a period of one year after calibration, at 18 ° C to 28 ° C (64 ° F to 82 ° F), with relative humidity to 90 %. Accuracy specifications are given as:

±( [ % of reading ] + [ number of least significant digits ] )

AC mV, AC V, AC µA, AC mA, and AC A specifications are ac coupled, true rms and are valid from 5 % of range to 100 % of range. AC crest factor can be up to 3.0 at full-scale, 6.0 at half-scale except the 3000 mV and 1000 V ranges where it is 1.5 at full scale, 3.0 at half-scale.

Function

Range

Resolution

45 Hz-1 kHz

20-45 Hz

Accuracy

1 kHz-10 kHz 10 kHz-20 kHz 20 kHz-100 kHz

AC mV 1, 2

AC V 1, 2

dBV

50.000 mV

500.00mV

3000.0 mV

5.0000 V

50.000 V

500.00V

1000.0 V

52 to 6

6 to +34

+34 to +60

0.001 mV

0.01mV

0.1mV

0.0001 V

0.001 V

0.01V

0.1V

0.01dB

0.01dB

0.01dB

0.4% + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.1dB

0.1dB

0.1 dB

2 % + 80

2 % + 80

2 % + 80

2 % + 80

2 % + 80

2 % + 80

2 % + 80

0.2dB

0.2dB

0.2dB

5 % + 40

5 % + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.4% + 40

0.5dB

0.1dB

0.1dB

5.5% + 40

5.5% + 40

1.5% + 40

1.5% + 40

1.5% + 40 Not specified Not specified

0.5dB

0.2 dB

Not specified

15 % + 40

8 % + 40

8 % + 40

8 % + 40

8 % + 40

Not specified

Not specified

1.4dB

0.8dB

Not specified

1.For the 5,000 count mode, divide the number of least significant digits (counts) by 10.

2.A residual reading of 8 to 180 digits with leads shorted, will not affect stated accuracy above 5 % of range.

7-5

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Contents Model 187 Lifetime Limited Warranty Table of Contents Model 187 Making MeasurementsIii Maintenance SpecificationsList of Tables List of Figures Viii Contacting Fluke Safety InformationBefore You Start Safety Information WWarningBefore You Start Symbols International Electrical SymbolsTurning the Meter On Getting AcquaintedIntroduction Battery Considerations Automatic Power OffLow Battery Indication Automatic Backlight OffRotary Switch Rotary SwitchPushbuttons PushbuttonsRotary Switch Selections Position Rotary Switch Function Blue Key FunctionRotary Switch Positions View MEMButton Pushbuttons Yellow Button Description Function Pushbuttons Button Description Yellow Button FunctionPrimary Display Selecting the RangeUnderstanding the Display Bar Graph Secondary DisplayDisplay Features Number Feature Display Features Description Display Features Number 8.8.8Number Feature Display Features DescriptionDisplay Features Number 51000 FMS8888 HM8888 8.8Using the Input Terminals Input TerminalsUsing Display Hold Display Hold and AutoHOLDUsing AutoHOLD Using MIN MAXModel 187 Using Fast MN MX Min Max AvgUsing Relative Mode REL Using Hold with MIN MAX or Fast MN MXMaking Measurements Measuring VoltageMeasuring AC Voltage AC Voltage MeasurementDB Measurements in AC Volts Functions DBm DisplayMeasuring DC Voltage Both AC and DC Voltage MeasurementsAC over DC DC over AC AC and DC DisplayMeasuring Resistance Capacitors before measuring resistanceOFF Testing for Continuity Automatically subtract this valueUsing Conductance for High Resistance Tests For in-circuit tests, turn circuit power off Conductance Measurement Measuring Capacitance Testing Diodes Capacitance MeasurementDiode Test Electrically live circuits Measuring TemperatureShock, do not connect the thermocouples to Measuring Current Input RangesInput Alert Feature Measuring CurrentMeasuring AC Current Following are some tips for measuring current11. AC Current Measurement Measuring DC Current Total current to circuit Current through one componentMeasuring Frequency 13. Functions Allowing Frequency MeasurementMeasuring Duty Cycle 14. Hz DisplayMeasures Positive Pulse Measures Negative PulseMeasuring Pulse Width 16. Duty Cycle DisplayStart and Stop on Positive Slope Start and Stop on Negative Slope18. Pulse Width Display Saved Readings Memory Using Memory & Communications FeaturesTypes of Memory Logged Readings MemoryStopping Logging Storing Saved ReadingsStarting Logging Viewing Memory Data To avoid electric shock, disconnect the testView Display MEMUsing Communications 187 Clearing MemoryChanging the Default Settings Selecting Setup OptionsPrecondition Function Specific Setup SelectionsFactory Default OptionCommon Setup Selections ChoicesAdjusting the Temperature Offset Changing the Default Settings Selecting Display Resolution 3 1/2 or 4 1/2 Digits Setting the Power Off TimeoutSetting the 24-Hour Clock Setting the Line Main FrequencyReturning to Factory Defaults Saving Setup OptionsTesting the Fuses MaintenanceIntroduction General Maintenance Replace F2 if Replace F1 if Displayed Replacing the Batteries Battery and Fuse Replacement Case of Difficulty Replacing the FusesUser-Replaceable Parts MP8 MP9 Specifications Safety and CompliancesPhysical Specifications Feature Summary Basic Specifications Detailed Accuracy Specifications 20 kHz Accuracy Function45-1 kHz KHz-100 kHzDC a 500.00 Ω Capacitance Diode Test MIN MAX AVG Frequency Counter Sensitivity Burden Voltage A, mA, µAInput Characteristics