Fluke 787 user manual Testing Diodes, Displaying Minimum, Maximum, and Average

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787

Users Manual

Testing Diodes

To test a single diode:

1.Insert the red test lead into the Vjack and black test lead into the COM jack.

2.Set the rotary switch to O.

3.Press the BLUE pushbutton so that the D symbol is on the display.

4.Touch the red probe to the anode and the black probe to the cathode (side with band or bands). The meter should indicate the appropriate diode voltage drop.

5.Reverse the probes. The meter should display OL, indicating a high impedance.

6.The diode is good if it passes the tests in steps 4 and 5.

Displaying Minimum, Maximum, and Average

MIN MAX recording stores the lowest and highest measurements, and maintains the average of all measurements.

Press Mto turn on MIN MAX recording. Readings are stored until you turn the meter off, switch to another measurement or source function, or turn MIN MAX off.

The beeper sounds when a new maximum or minimum is recorded. Auto power-off is disabled and auto ranging is turned off during MIN MAX recording.

Press Magain to cycle through the MAX, MIN, and AVG displays. Press and hold Mfor 1 second to erase stored measurements and exit .

If MIN MAX recording is on continuously for over 40 hours, minimum and maximum readings are still recorded, but the displayed average no longer changes.

In MIN MAX recording, press Ito suspend recording; press Iagain to resume recording.

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Contents 787 Limited Warranty & Limitation of Liability Table of Contents 787 IndexIntroduction Read Safety Information before you use the meterContacting Fluke Safety Information 787ProcessMeter International Symbols Meaning Symbol MeaningHow to Get Started Fluke 787 ProcessMeterGetting Acquainted with the Meter Input/Output JacksSource Current Function Input/Output Jacks Measurement FunctionsSimulate Transmitter Function Rotary Switch Positions for Measurements Functions Pushbutton ActionsRotary Switch Positions for mA Output Default Function Pushbuttons Pushbuttons FunctionsPushbutton CoarseElements of the Display Element Display MeaningDisplay Element MA, DC, mV, AC Or kΩ, kHz Auto 400100030 Input Impedance Measuring a Composite SignalMeasuring Electrical Parameters RangesTesting Diodes Displaying Minimum, Maximum, and AverageUsing TouchHold Compensating for Test Lead ResistanceUsing the Current Output Functions Source ModeSourcing Current Simulate Mode Changing the Current SpanSimulating a Transmitter Adjustment MA Output Adjust PushbuttonsProducing a Steady mA Output Manually Stepping the mA Output MA Stepping PushbuttonsMA Step Values Value for each span setting To 20 mA Auto Ramping the mA OutputPushbutton Default Power-Up OptionsPower-Up Options Action TakenMaintenance Battery LifeUsing the Holster and Flex-Stand General MaintenanceUsing the Holster and Flex-Stand Replacing the Battery Replacing the BatteryReplacing a Fuse If the Meter does not Work Replacing a FuseReplacement Parts and Accessories Fluke PN or Model no Replacement PartsDescription QuantityMP8 DC Volts Measurement SpecificationsResolution Range V dcDC Millivolts Measurement Range mV dc Resolution 400.0 Accuracy % of Reading + CountsAC Volts Measurement AC Current Measurement DC Current MeasurementOhms Measurement Range ResolutionMeasurement Current Frequency Counter Sensitivity Frequency Counter AccuracyInput Range Minimum Sensitivity rms Sinewave 5 Hz to 5 kHz Simulate Mode General SpecificationsSource mode Diode Test and Continuity TestCertifications CSA, UL, TÜV Index Knob positions, 9 Pushbuttons Loop supply, external Index 787