F3 Operations Manual
39
Whenever, the voltage of the batteries drops to an unacceptable
level, the Low Battery Alarm (high pitched fast continuous oscillating
tone) will be heard by the operator. When this occurs the operator
should immediately switch the detector off and replace the batteries
as follows:
a. Carefully unlock the Battery Pack Lid by twisting the Battery
Lock Lever counter clockwise one-quarter turn. Once unlocked,
carefully pull the lid away from the Battery Pack (the lid will stay
attached to the battery pack by a tether – Figure 27.
P0615-A
Battery
Map
Battery
Pack
Battery
Pack Lid
Battery
Lock
Lever
Figure 27: Exchanging Batteries
b. Using the battery maps, located on the side of the Battery Pack
and on the inside of the Battery Pack Lid, insert four D cell
batteries. Replace the Battery Pack Lid and rotate the Battery
Lock Lever clockwise one-quarter turn. If the batteries are
inserted incorrectly, the F3 will not switch on.
c. Resume operations by completing the Test Piece procedure, as
detailed in Section 4.2.c.
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