Yokogawa 212 Heat Calculator - Manual (Page 14)

Three key switches provide the following functions:
Displays the accumulated (non-resettable) totals
for Energy, Volume, operating time (elapsed time)
and Energy total for log entries.
Also changes digits, decimal point or units when
entering the set-up parameters. A flashing digit,
decimal point or unit will indicate that the
parameter can be changed.
If the Reset function is enabled during set-up, the
RESET key, when held for 5 seconds, will reset
all totals and the operating time.
Also increments the digit, changes decimal point
position, steps through units when entering set-up
parameters and steps through individual log
entries.
Used to change the display to the next parameter.
Also steps through display modes when held for 5
seconds.
12 Operation