FLUKE FLK-789/773 BU User Manual for the Fluke FLK-789/773 BU Process Meter and Milliamp Process Clamp Meter Bundle

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ProcessMeter™

Maintenance

Replacing a Fuse

! Warning

To avoid personal injury or damage to the

meter, use only the specified replacement

fuse, 440 mA 1000 V fast-blow, Fluke PN

943121.

Both current input jacks are fused with separate 440 mA

fuses. To determine if a fuse is blown:

1. Turn the rotary function switch to

2. Plug the black test lead into COM, and the red test

lead into the A c input.

3. Using an ohmmeter, check the resistance between

the meter test leads. If the resistance is about 1 Ω,

the fuse is good. An open reading means that fuse

F2 is blown.

4. Move red test lead to .

5. Using an ohmmeter, check the resistance between

the meter test leads. If the resistance is about 14 Ω,

the fuse is good. An open means that fuse F1 is

blown.

If a fuse is blown, replace it as follows. Refer to Figure 6

as necessary:

1. Remove the test leads from the meter and turn the

meter OFF.

2. 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.

3. Remove either fuse by gently prying one end loose,

then sliding the fuse out of its bracket.

4. Replace the blown fuse(s).

5. Replace the battery access door. Secure the door by

turning the screws one-quarter turn clockwise.

1.888.610.7664 sales@GlobalTestSupply.com

Fluke-Direct.com

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FLUKE FLK-789/773 BU Process Meter and Milliamp Process Clamp Meter Bundle