Calculated Industries 4090 - Manual (Page 114)

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(Cont’d)
To Set Mathematical Operations Method:
KEYSTROKE DISPLAY
= (twelfth press of =) MATH OrdEr
+ (plus sign) MATH CHAIn
To Set Fractional Mode:
KEYSTROKE DISPLAY
= (thirteenth press of =) FRAC Std.
+ (plus sign) FRAC COnSt
+ (repeats options) FRAC Std.
Note: Press o at any time to exit the Preference Mode. To Reset your calculator to
the default Preference Settings, turn off your calculator, hold down the multiplication
x key, and turn on. “ALL rESEt” will flash for one second before clearing the display.
Please follow the guidelines listed in this section for proper care and
operation of your calculator. Not following the instructions listed
below may result in damage not covered by your warranty. Refer to
the Repair and Return section on page 116 for more details.
Do not expose calculator to temperatures outside the operating
temperature range of 32ºF – 104ºF (0ºC – 40ºC).
Do not expose calculator to high moisture such as submersion
in water, heavy rain, etc.
APPENDIX H — CARE INSTRUCTIONS