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Maintenance
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Cleaning
Wipe instrument with damp cloth as needed. Do not apply solvents or abrasives to the
meter. Store in a cool dry place with the batteries removed.
Battery Replacement
When the batteries weaken, the LCD display will dim or go completely blank. To replace
the batteries, open the rear battery compartment and insert four (4) new 1.5V 'AA' batteries
with correct polarity position.
Paper roll replacement
When the paper roll is depleted, flip up the paper compartment lid, feed the paper through
the paper slit, and feed the paper using the Line Feed button. Place the roll in the
compartment and snap the compartment cover shut preventing the paper from falling out.
Hint: Folding the paper into a point allows the paper to "catch" a bit easier when feeding it
through the slit (see diagram).
New paper rolls are available through Extech Instruments and Extech distributors.
NOTE: Thermal paper prints on only one side. Ensure paper is positioned properly as
shown in diagram.
Fold paper
as shown
when feeding
new roll
12
Model 451181 Version 3.0 07/06
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