FLUKE-787 Fluke Electronics, FLUKE-787 Datasheet - Page 21
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FLUKE-787
Manufacturer Part Number
FLUKE-787
Description
PROCESS METER
Manufacturer
Fluke Electronics
Series
ProcessMeter™r
Type
Digital (DMM)r
Datasheet
1.FLUKE-787.pdf
(50 pages)
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
17