Welch Allyn 767 Diagnostic System - User Manual - Manual (Page 8)

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Clock Option
The clock, powered by a battery, operates separately from the main power supply.
For this reason the time will be displayed when the main unit is turned OFF or
unplugged from the wall power socket.
Engage Seconds Mode:
Press Timer button to engage. Press Start/Stop button to begin seconds mode.
Press the Clock button to return the Hour/Minute display.
Start/Stop button Use this button to START AND STOP seconds count.
Press once to start the seconds. Press again to stop
seconds.
Clock button Use this button to return from seconds mode to hour/
minute by pressing once.
Timer button Use this button to change to seconds mode (timer).
Clock module remova tab Pull forward to remove clock module and gain access
for changing battery.
CLOCK
MODULE
REMOVAL
TAB
START/STOP
BUTTON
TIMER
BUTTON
CLOCK
BUTTON
ON-OFF SWITCH/
PILOT LIGHT