Fluke 787 Auto Ramping the mA Output, MA Step Values Value for each span setting To 20 mA

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787

Users Manual

			Table 10. mA Step Values

	Step		Value (for each span setting)
			4 to 20 mA		0 to 20 mA
	0%		4.000 mA		0.000 mA
	25%		8.000 mA		5.000 mA
	50%		12.000 mA		10.000 mA
	75%		16.000 mA		15.000 mA
	100%		20.000 mA		20.000 mA
	125%		24.000 mA
	120%				24.000 mA

Auto Ramping the mA Output

Auto ramping gives you the ability to continuously apply a varying current stimulus from the meter to a transmitter, while your hands remain free to test the response of the transmitter. Select either sourcing or simulating by choosing the SOURCE or SIMULATE jacks.

When the rotary switch is in the OUTPUT mA Jposition, the meter produces a continuously repeating 0% - 100% - 0% ramp in your choice of three ramp waveforms:

E0% - 100% - 0% 40-second smooth ramp, (default)

P0% - 100% - 0% 15-second smooth ramp

N0% - 100% - 0% Stair-step ramp in 25% steps, pausing 5 seconds at each step. Steps are listed in Table 10.

The ramp times are not adjustable. Press the BLUE pushbutton to cycle through the three waveforms.

Note

At any time during auto ramping, you can freeze the ramp simply by moving the rotary switch to the [mA position. Then you can use the COARSE, FINE, and % STEP adjust pushbuttons to make adjustments.

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Contents 787 Limited Warranty & Limitation of Liability Table of Contents 787 IndexRead Safety Information before you use the meter IntroductionContacting Fluke Safety Information 787ProcessMeter International Symbols Meaning Symbol MeaningHow to Get Started Fluke 787 ProcessMeterGetting Acquainted with the Meter Input/Output JacksInput/Output Jacks Measurement Functions Source Current FunctionSimulate 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 Span Simulating a Transmitter MA Output Adjust Pushbuttons AdjustmentProducing 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 dcRange mV dc Resolution 400.0 Accuracy % of Reading + Counts DC Millivolts MeasurementAC Volts Measurement AC Current Measurement DC Current MeasurementRange Resolution Ohms MeasurementMeasurement Current Frequency Counter Accuracy Frequency Counter SensitivityInput 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