Replace the battery when the “Lo Batt” indicator shows in the display. Long life alkaline batteries are available from Fluke Biomedical. Any standard 9 V alkaline battery can be used in the Digital X-Ray Pulse Counter/Timer. To replace the battery, slide open the battery compartment on the bottom of the case. Remove the old battery, and install the new battery. Operation General Instructions Section 2 Operation 2.1 General Instructions Switch Settings The front panel selector/toggle switch on th