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Maintenance

Uses for the Zoom Mode (Models 83 and 85)

The relative mode, combined with the increased

sensitivity of the bar graph’s zoom mode, helps you make

fast and accurate zero and peak adjustments.

For zero adjustments, set the meter to the desired

function, short the test leads together, press C;

then connect the leads to the circuit under test. Adjust the

circuit’s variable component until the display reads zero.

Only the center segment on the Zoom bar graph is lit.

For peak adjustments, set the meter to the desired

function, connect the leads to the circuit under test; then

press C. The display reads zero. As you adjust for

a positive or negative peak, the bar graph length

increases to the right or left of zero. If an overange

symbol lights

(Û ® ), press C twice to set a new

reference; then continue with your adjustment.

Maintenance

Repairs or servicing not covered in this manual should be

performed only by qualified personnel as described in the

80 Series III Service Manual

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 new swab with a cleaning and oiling agent

(such as WD-40). Work the swab around in each

terminal. The oiling agent insulates the terminals

from moisture-related activation of the Input Alert

feature.

Fluke 80 Series III User Manual

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