Fluke 787 user manual Using TouchHold, Compensating for Test Lead Resistance

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ProcessMeter

Measuring Electrical Parameters

Using TouchHold

Note

You must have MIN MAX recording off to use TouchHold.

!Warning

To avoid possible electric shock, do not use TouchHold to determine if dangerous voltage is present. TouchHold will not capture unstable or noisy readings.

Activate TouchHold® if you want the meter to freeze the display on each new stable reading (except in the frequency counter function). Press Ito activate TouchHold. This feature allows you to take measurements in situations in which it is difficult to look at the display. The meter beeps and updates the display with each new stable reading.

Compensating for Test Lead Resistance

Use the relative reading feature (Qon the display) to set the present measurement as a relative zero. A common use for this is to compensate for test lead resistance when measuring Ω.

Select the Ω measure function, touch the test leads together, then press C. Until you press C again, or switch to another measurement or source function, the readings on the display will subtract the lead resistance.

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Contents 787 Limited Warranty & Limitation of Liability Table of Contents Index 787Contacting Fluke Read Safety Information before you use the meterIntroduction 787 Safety InformationProcessMeter Symbol Meaning International Symbols MeaningFluke 787 ProcessMeter How to Get StartedInput/Output Jacks Getting Acquainted with the MeterSimulate Transmitter Function Input/Output Jacks Measurement FunctionsSource Current Function Rotary Switch Positions for Measurements Pushbutton Actions FunctionsRotary Switch Positions for mA Output Default Function Pushbuttons Functions PushbuttonsCoarse PushbuttonElements of the Display Display Meaning ElementDisplay Element MA, DC, mV, AC Or kΩ, kHz Auto 400100030 Ranges Measuring a Composite SignalMeasuring Electrical Parameters Input ImpedanceDisplaying Minimum, Maximum, and Average Testing DiodesCompensating for Test Lead Resistance Using TouchHoldSource Mode Using the Current Output FunctionsSourcing Current Changing the Current Span Simulate ModeSimulating a Transmitter Producing a Steady mA Output MA Output Adjust PushbuttonsAdjustment MA Stepping Pushbuttons Manually Stepping the mA OutputAuto Ramping the mA Output MA Step Values Value for each span setting To 20 mAAction Taken Power-Up OptionsPower-Up Options Pushbutton DefaultGeneral Maintenance Battery LifeUsing the Holster and Flex-Stand MaintenanceUsing the Holster and Flex-Stand Replacing the Battery Replacing the BatteryReplacing a Fuse Replacing a Fuse If the Meter does not WorkReplacement Parts and Accessories Quantity Replacement PartsDescription Fluke PN or Model noMP8 Range V dc SpecificationsResolution DC Volts MeasurementAC Volts Measurement Range mV dc Resolution 400.0 Accuracy % of Reading + CountsDC Millivolts Measurement DC Current Measurement AC Current MeasurementMeasurement Current Range ResolutionOhms Measurement Input Range Minimum Sensitivity rms Sinewave 5 Hz to 5 kHz Frequency Counter AccuracyFrequency Counter Sensitivity Diode Test and Continuity Test General SpecificationsSource mode Simulate ModeCertifications CSA, UL, TÜV Index Knob positions, 9 Pushbuttons Loop supply, external Index 787