Digital Multimeters
Basic Maintenance
9
Basic Maintenance
XWWarning
To avoid possible electric shock or personal injury, repairs or
servicing covered in this manual should be performed only by
qualified personnel.
General Maintenance
Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or
solvents.
Dirt or moisture in the terminals can affect readings and can falsely activate the Input
Alert feature. Clean the terminals as follows:
1. Turn the Meter off and remove all test leads.
2. Shake out any dirt that may be in the terminals.
3. Soak a clean swab with mild detergent and water. Work the swab around in each
terminal. Dry each terminal using canned air to force the water and detergent out of
the terminals.
XWWarning
To avoid electrical shock or personal injury, remove the test
leads and any input signals before replacing the battery or
fuses. To prevent damage or injury, install ONLY specified
replacement fuses with the amperage, voltage, and speed
ratings shown in Table 7.
Fuse Test
As shown in Figure 1, with the Meter in the function, insert a test lead into the
jack and place the probe tip on the other end of the test lead against the metal of the
current input jack. If “LEAd” appears in the display, the probe tip has been inserted too far
into the amps input jack. Back the lead out a bit until the message disappears and either
OL or a resistance reading appears in the display. The resistance value should be as
shown in Figure 1. If the tests give readings other than those shown, have the Meter
serviced.
Touch top half
of input contacts
Good F1 fuse: 00.0 Ω to
00.5 Ω
Replace fuse: OL
Good F2 fuse: 0.995 kΩ to
1.005 kΩ
Replace fuse: OL
gaq105.eps
Figure 1. Current Fuse Test
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