Monroe Ultimate User Manual page 137

Monro-Manual-1-50
Key top Size
The largest keys on the keyboard should be
those used most frequently. For the calculator
this certainly means the Plus Key, Minus Key,
Total Key, Zero Key and Decimal Key. The actual
size of these keys varies greatly from model to
model and it is often what one becomes com-
fortable with that determines what size is large
enough. Small Keys, especially those used
often, hinder touch operation and therefore pro-
ductivity.
Key top Shape
The shape of keys often enhances touch opera-
tion. For example, the numeric keypad (1 -9) on
the Ultimate has cupped keys. The function
keys have flat surfaces enabling the operator to
differentiate between the numeric keypad and
the function keys by feel. The 5 key has a tiny
dome in its center, much like a computer key-
board, it assists the operator in quickly locating
the home key (5) and home row (4, 5 and 6).
Key top Stability
Keys with little side to side play enhance touch
operation by providing a surety of touch.
Excessive play on the key top or pressing key
tops in locations that prohibit entry slow down
or eliminate the ability to operate the calculator
quickly.
Two Key Rollover
Two key rollover enhances speed in touch
operation. For example, if entering the amount
12 the user may press the 1 key followed by
depression of the 2 key. Both keys are pressed.
Removing the index finger from the 1 key, and
then removing the middle finger from the 2 key
causes both 1 and 2 to be entered. The fastest
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touch operators roll from the entry of keys to a
function key. Two key rollover eliminates the
need for pressing each key distinctly one key at
a time.
Electronic Keyboard Interlocks
In the event two keys are pressed
simultaneously, the key first sensed by the
calculator will be entered. Normally it will be
the key pressed with the greatest force. By not
creating an Error (which on many calculators
would require clearing) Electronic Keyboard
Interlocks tries to interpret the entry and
choose the most likely correct key depression.
Decimal Settings
Every calculator has one or more decimal
settings. The decimal setting controls the
number of decimal places desired in the total
or result. The decimal selector should never
limit or fix the number of decimal places
contained in an entry as its function is to
determine the number of entries in the total
or result. If a calculator edits the number of
decimal places in an entry to the decimal
setting, it is violating the precept that between
the operator and the calculator, the only
intelligent entity is the operator. If the calculator
edits entries, an operator would need to move
the decimal selector to reflect the entry with
the greatest number of decimal places to
permit entry of all figures, and then move the
decimal selector back to the desired number of
decimal places in the answer before pressing
the total key. Thatís both additional manual and
mental effort.
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