Fluke 27 [23/30] Fuse test

Operator Maintenance

Fuse Test

WWarnings

To avoid possible electric shock or personal

injury:

• Remove the test leads and any input

signals before replacing battery or fuses.

• Before closing battery door, make sure

fuse cover is in place.

• Make sure the battery door is closed and

latched before you operate the meter.

To prevent arc blast and resulting injury,

install only the EXACT replacement fuse

listed in Table 4.

1. Turn the function selector switch to the Ω position.

2. Connect a test lead from the T input terminal

to the A input terminal.

3. The display should indicate between 0.1 ohm and

0.3 ohm. This tests F2 (11A, 1000V fast).

4. Move one end of the test lead from the A input

terminal to the mA/µA input terminal.

5. The display should indicate between 5.3 ohms and

6.0 ohms. This tests F1 (44/100A, 1000V fast.

6. If either of the above display indications is OL

(overload), replace the appropriate fuse.

Fuse Replacement

WWarning

To avoid personal injury, do not use

makeshift fuses or short-circuit the fuse

holders.

Referring to Figure 1, use the following procedure to

check or replace the Fluke 27 fuses:

1. Perform steps 1 through 4 of the battery replacement

procedure.

2. Pull the fuse cover down, then out of the meter.

3. Remove the defective fuse (or check continuity

through the suspected fuse), and if necessary install

a new fuse of the same size and rating.

4. Snap the fuse cover back into place.

5. Reinstall the battery spacer/cover as instructed in

step 6 of the battery replacement procedure.