FLUKE-789 Fluke Electronics, FLUKE-789 Datasheet - Page 42

• 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
Replacing a Fuse
Both current input jacks are fused with separate
440 mA fuses. To determine if a fuse is blown:
1.
2.
3.
4.
5.
34
To avoid personal injury or damage to the
meter, use only the specified replacement
fuse, 440 mA 1000 V fast-blow, Fluke PN
943121.
Turn the rotary function switch to
Plug the black test lead into COM, and the red test
lead into the A c input.
Using an ohmmeter, check the resistance between
the meter test leads. If the resistance is about 1
the fuse is good. An open reading means that fuse
F1 is blown.
Move red test lead to ^.
Using an ohmmeter, check the resistance between
the meter test leads. If the resistance is about 14
the fuse is good. An open means that fuse F2 is
blown.
! Warning
W
.
,
,
If a fuse is blown, replace it as follows. Refer to Figure 11
as necessary:
1.
2.
3.
4.
5.
If the Meter does not Work
Remove the test leads from the meter and turn the
meter OFF.
With a standard blade hand screwdriver, turn each
battery door screw counterclockwise so that the slot
is parallel with the screw picture molded into the
case.
Remove either fuse by gently prying one end loose,
then sliding the fuse out of its bracket.
Replace the blown fuse(s).
Replace the battery access door. Secure the door by
turning the screws one-quarter turn clockwise.
Examine the case for physical damage. If there is
damage, make no further attempt to use the meter,
and contact a Fluke Service Center.
Check the battery, fuses, and test leads.
Review this manual to make sure you are using the
correct jacks and rotary function switch position.