Monarch Instrument TACH-4AR - Manual (Page 7)

SETTING THE SCALE FACTOR
SCALE and TOTALIZE modes have independent scale factors. To change
the scale factor, press the MENU button then press the UP ARROW (!)
until either “SCALE” or “TOTAL” is displayed. Press the LEFT
ARROW (") button to change the scale factor. This will display the
current scale factor with the right most digit blinking. The blinking digit
is the one to be changed. This digit can be increased with the UP
ARROW (!) button. After the digit gets to 9, it will return to 0. Select
the digit to be changed with the LEFT ARROW (") button. Move the
decimal point with the POWER button. The RESET button sets the
scale factor to 1. Pressing the MENU button returns to the “MENU”
without changing the scale factor. Save the new value with the RECALL
(STORE) button.
TOTALIZER MODE
This mode is used to totalize an input from either the internal optics or
the remote sensor (TACH-4AR only). Each time the unit receives an
input from the reflective tape (T-5), for example, it increments the
display by the value set in the Scale Factor. Note that this is not the
same scale factor as in the scale mode. Once this mode is selected, the
unit remains on permanently until turned off by the user, or 60 seconds
passes with a display of zero. The unit can be turned off at any time by
pressing the POWER button. Readings can be stopped or started by
moving the optics away from the reflective tape (T-5) or by blocking the
optics. If the displayed value exceeds 999,999, the unit will show
“OVFLOW”. Note that the unit will remain in this condition until
cleared by the user. (Press RESET button)
POWER/LOCK Turns the unit off.
RECALL/STORE Holds the display for four seconds while totalizing
continues.
RESET/LOCK Sets the reading back to zero
LEFT ARROW (") Turns the LCD back light on for 60 seconds
(assuming the back light is not already on)
SELF TEST
To run the self test, press the UP ARROW (!) button in the MENU mode
until “TEST” is displayed. Press the LEFT ARROW (") button. The unit
will display the current software revision as “Rev x.x”. The unit will then
automatically proceed with the self test. All segments of the display will
be on, as will the back light, the internal optics, and the remote sensor
(TACH-4AR only). They will remain on for about 5 seconds while the
unit performs other internal tests. If the tests pass, the unit will return
to the MENU. Otherwise an error message (ERR x) will be displayed for
about 5 seconds before returning to “MENU” display. Pressing RESET
at this point returns to the current mode of operation.
BATTERIES
The TACH-4A and TACH-4AR are supplied with four “AA” alkaline
batteries unless ordered with the optional Recharger and NiCad rechargeable
batteries. The instrument will operate continuously in excess of 8 hours
on fully charged batteries.
RECHARGER AND RECHARGEABLE BATTERIES
(OPTIONAL ACCESSORY)
The RECHARGER AND NICAD RECHARGEABLE BATTERIES
allow recharging without removing the batteries from the instrument.
Insert the Recharger plug into the 5.5mm DC charger jack on the lens
panel. Total recharge time is approximately 16 hours. THE INSTRUMENT
MAY BE OPERATED WITH THE RECHARGER. The instrument will
operate continuously in excess of 8 hours on fully charged batteries.
LOW BATTERY INDICATION
When the batteries are low, the display blinks every 0.5 seconds. Once
the display starts to blink, the Tachometer can be operated for an
additional 10 to 15 minutes. Should the battery get too low to operate
the instrument correctly, the display will indicate “LO BAT” for 5
seconds and the instrument will automatically shut off.