FLUKE-787 Fluke Electronics, FLUKE-787 Datasheet - Page 21

• Manufacturer Part Number: FLUKE-787
• Description: PROCESS METER
• Manufacturer: Fluke Electronics
• Series: ProcessMeter™r
• Type: Digital (DMM)r

Specifications of FLUKE-787

• Includes: Battery, Clips, Test Leads
• Style: Handheld
• Display Digits: 3.75
• Display Type: LCD
• Display Count: 4000
• Function: Voltage, Current, Resistance, Frequency
• Functions, Extra: Continuity, Diode Test
• Features: Auto Off, Backlight, Hold, Min/Max/Ave
• Ranging: Auto/Manual
• Response: True RMS
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Other names: Q4953585

Measuring Electrical Parameters
The proper sequence for taking measurements is as
follows:
1.
2.
3.
Input Impedance
For the voltage measurement functions, input impedance
is 10 M . See the specifications for more information.
Ranges
A measurement range determines the highest value the
meter can measure. Most meter measurement functions
have more than one range (see the Specifications).
Being in the right range is important:
Plug the test leads into the appropriate jacks.
Set the rotary knob.
Touch the probes to the test points.
If the range is too low, the display shows OL
(overload).
If the range is too high, the meter will not be
displaying its most accurate measurement .
The meter normally automatically selects the lowest
range that will measure the applied input signal (Auto
showing on the display). Press
the range. Each time you press
selects the next higher range.
If you have locked the range, the meter resumes auto
ranging when you change to another measurement
function or you press
Measuring a Composite Signal
Because the input is dc-coupled, to meaure an ac voltage
or frequency with a dc bias, you must manually select the
range specified in Table 7. For example, to measure 100
mV ac with 20 V dc superimposed, select the 4 V range.
Table 7. Range Requirements for Measuring a
Range (ac)
400.0 mV
4.000 V
40.00 V
400.0 V
1000 V
Composite Signal
Measuring Electrical Parameters
and hold it for 1 second.
Max. Allowable AC + DC
if you want to lock
, the meter
1000 V
300 V
400 V
30 V
3 V
ProcessMeter
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