KYORITSU 4105A - Manual (Page 9)

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7. Battery Replacement
DANGER
Never attempt to open the battery compartment cover, if the outer
surface of the instrument is wet.
Never attempt to replace batteries while making measurement. To avoid
shock hazard, turn the instrument off and disconnect the test leads and
the probes from the instrument before opening the battery compartment
cover.
CAUTION
Do not mix new and old batteries.
Install batteries in the orientation as shown inside the battery
compartment, observing correct polarity.
q Turn off the instrument and disconnect the test probes from the
terminals.
w Loosen two screws on the bottom of the instrument and remove the
battery cover.
e Always replace all six batteries in correct polarity.
Battery : R6P (AA dry battery) x6
r Put the cover back in place and tighten the two screws.
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8. Notes on Housing Case & Accessories
8-1 Case Lid
Case lid can be fit under the housing case while making measurement.
8-2 How to Fit Strap Belt
The instrument is equipped with a strap belt to suspend from the neck to
allow both hands to be used freely for easy and safe operation