Monarch Instrument TACH-4AR - Manual (Page 2)

OVERVIEW
The TACH-4A has 6 control buttons. Several have more than one function.
POWER (LOCK) - Used to turn the instrument on, and in some cases off.
It is used to initiate the timer and counter operations and to control the
RPM measurement function.
RECALL (STORE) - Used to recall the maximum and minimum values in
RPM and SCALE modes, temporarily hold the display in the Totalize
mode, and “save” (store) new setups in the MENU mode.
RESET (LOCK) - Resets all stored measurements in all modes back to
zero. Holding RESET and pressing POWER on start-up “locks on” the unit
in RPM and Scale modes. RESET returns scale factor to “00001” from a
previously selected scale factor.
UP ARROW (!) - Advances Menu mode selections. Increments the value
of the selected digit when setting scale factors.
LEFT ARROW (") - Turns LCD back light on for 60 seconds in any mode.
Selects menu item options in menu mode. Selects the digit to be edited
when setting a scale factor.
MENU - Pressing MENU then POWER will shut the instrument off.
Pressing MENU then UP ARROW will enter the menu mode and display
the current Menu selection.
POWER ON/OFF
The unit can be powered up by pressing the POWER (LOCK) button. When
turning the unit on, it can be “locked on” by pressing and holding the
RESET (LOCK) button then pressing the POWER(LOCK) button. Locking
the unit on allows it to make continuous readings without holding the
POWER button.
When the unit is powered up, it will operate in the last mode selected prior
to turn off. The TACH-4A is shipped from the factory in the RPM mode.
The unit can be shut off in any mode by pressing the MENU button then
POWER button. When the Lock Chevron is not displayed and no button is
pressed for 60 seconds, the unit will automatically shut off.