Fluke 189 user manual Frequency Counter Sensitivity, Burden Voltage A, mA, µA

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Specifications	7
Frequency Counter Sensitivity

Frequency Counter Sensitivity

Approximate VAC Sensitivity

(RMS Sine Wave)1

Input Range

50mV

500mV

3000 mV

5V

50V

500V

1000 V

15 Hz to

100 kHz 2

5mV

20mV

500mV

0.5 V

5V

20V

100V

500 kHz 2

10mV

20mV 2000 mV

2.0V

5.0V

20V

100V

VAC Bandwidth 3

1MHz

1MHz

800kHz

950kHz

1MHz

1MHz

> 400 kHz

Approximate VDC

Trigger Levels 1

-5 mV & 5 mV

5 mV & 65 mV

140 mV & 200 mV

1.4V & 2.0 V

0.5V & 6.5 V

5 V & 65 V

5 V & 65 V

VDC

Bandwidth 3

1MHz

1MHz

90kHz

14kHz

> 400 kHz > 400 kHz > 400 kHz

. 1. Maximum input = 10 x Range (1000 V max). Noise at low frequencies and amplitudes may affect accuracy. 2. Useable at reduced sensitivity to 0.5 Hz and 1000 kHz.

. 3. Typical frequency bandwidth with full scale (or maximum 2 X 107 V-Hz product) RMS sine wave.

Burden Voltage (A, mA, µA)

Function	Range
mA - ∝ A	500.00	∝ A
	5,000 ∝	A
	50.000 mA
	400.00 mA
A	5.0000	A
	10.000	A

Burden Voltage (typical)

102 ∝ V / ∝ A

102 ∝ V / ∝ A

1.8mV / mA

1.8mV / mA

0.04V / A

0.04V / A

7-11

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Contents Model 187 Lifetime Limited Warranty Table of Contents Making Measurements Model 187Iii Specifications MaintenanceList of Tables Model 187 List of Figures Viii Contacting Fluke Safety InformationBefore You Start WWarning Safety InformationBefore You Start International Electrical Symbols SymbolsTurning the Meter On Getting AcquaintedIntroduction Automatic Power Off Battery ConsiderationsAutomatic Backlight Off Low Battery IndicationRotary Switch Rotary SwitchPushbuttons PushbuttonsBlue Key Function Rotary Switch Selections Position Rotary Switch FunctionView MEM Rotary Switch PositionsButton Pushbuttons Yellow Button Description Function Yellow Button Function Pushbuttons Button DescriptionPrimary Display Selecting the RangeUnderstanding the Display Secondary Display Bar GraphDisplay Features Number Feature Display Features Description 8.8.8 Display Features NumberDisplay Features Description Number FeatureFMS8888 HM8888 8.8 Display Features Number 51000Input Terminals Using the Input TerminalsDisplay Hold and AutoHOLD Using Display HoldUsing MIN MAX Using AutoHOLDModel 187 Min Max Avg Using Fast MN MXUsing Hold with MIN MAX or Fast MN MX Using Relative Mode RELMeasuring Voltage Making MeasurementsAC Voltage Measurement Measuring AC VoltageDBm Display DB Measurements in AC Volts FunctionsBoth AC and DC Voltage Measurements Measuring DC VoltageAC and DC Display AC over DC DC over ACCapacitors before measuring resistance Measuring ResistanceOFF Automatically subtract this value Testing for ContinuityUsing Conductance for High Resistance Tests For in-circuit tests, turn circuit power off Conductance Measurement Measuring Capacitance Capacitance Measurement Testing DiodesDiode Test Electrically live circuits Measuring TemperatureShock, do not connect the thermocouples to Input Ranges Measuring CurrentMeasuring Current Input Alert FeatureFollowing are some tips for measuring current Measuring AC Current11. AC Current Measurement Measuring DC Current Current through one component Total current to circuit13. Functions Allowing Frequency Measurement Measuring Frequency14. Hz Display Measuring Duty CycleMeasures Negative Pulse Measures Positive Pulse16. Duty Cycle Display Measuring Pulse WidthStart and Stop on Negative Slope Start and Stop on Positive Slope18. Pulse Width Display Model 187 Logged Readings Memory Using Memory & Communications FeaturesTypes of Memory Saved Readings MemoryStopping Logging Storing Saved ReadingsStarting Logging To avoid electric shock, disconnect the test Viewing Memory DataMEM View DisplayClearing Memory Using Communications 187Model 187 Selecting Setup Options Changing the Default SettingsOption Function Specific Setup SelectionsFactory Default PreconditionChoices Common Setup SelectionsAdjusting the Temperature Offset Changing the Default Settings Setting the Power Off Timeout Selecting Display Resolution 3 1/2 or 4 1/2 DigitsSetting the Line Main Frequency Setting the 24-Hour ClockSaving Setup Options Returning to Factory DefaultsTesting 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 Safety and Compliances SpecificationsPhysical Specifications Feature Summary Basic Specifications Detailed Accuracy Specifications KHz-100 kHz Accuracy Function45-1 kHz 20 kHzDC a 500.00 Ω Capacitance Diode Test MIN MAX AVG Burden Voltage A, mA, µA Frequency Counter SensitivityInput Characteristics