FLUKE-789 Fluke Electronics, FLUKE-789 Datasheet - Page 26

• Manufacturer Part Number: FLUKE-789
• Description: PROCESSMETER DMM W/4-20MA SOURCE
• Manufacturer: Fluke Electronics
• Series: ProcessMeter™r
• Type: Digital (DMM)r

Specifications of FLUKE-789

• Includes: Battery, Clips, Test Leads
• Style: Handheld
• Display Digits: 4.5
• Display Type: LCD, Dual
• Display Count: 20000
• 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 / RoHS compliant by exemption
• Other names: 1633984; 614-1075; 789

789
Users Manual
Measuring Electrical Parameters
The proper sequence for taking measurements follows:
1.
2.
3.
4.
Input Impedance
For the voltage measurement functions, input impedance
is 10 M . See "Specifications" for more information.
Ranges
A measurement range determines the highest value and
resolution at which the meter can measure. Most meter
measurement functions have more than one range (see
"Specifications").
Make sure the correct range is selected:
18
Plug the test leads into the appropriate jacks
Set the rotary function switch to the desired function
Touch the probes to the test points
View the results on the LCD display
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 precise measurement.
The meter normally selects the lowest range that will
measure the applied input signal (Auto Range showing
on the display). Press R to lock the range. Each time
R is pressed, the meter selects the next higher range.
At the highest range, it returns to the lowest range.
If the range is locked, the meter resumes auto ranging
when it is changed to another measurement function or
when R is pressed and held for 1 second.
Testing Diodes
To test a single diode:
1.
2.
3.
4.
5.
Insert the red test lead into the Vjack and
black test lead into the COM jack.
Set the rotary function switch to
Press J(Blue) so that the D symbol is on the
display.
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.
Reverse the probes. The meter displays OL,
indicating a high impedance.
V
.