DATAMATH CALCULATOR MUSEUM |

Canon F-720

Date of introduction: | 2001 | Display technology: | LCD |

New price: | Display size: | 12 characters and 10 +2 | |

Size: | 5.6" x 3.1" x 0.45" | ||

Weight: | 2.8 ounces | Serial No: | |

Batteries: | 2*LR44 | Date of manufacture: | mth 01 year 2002 |

AC-Adapter: | Origin of manufacture: | China | |

Precision: | Internal 24-digit (binary) | Integrated circuits: | |

Memories: | 26 | ||

Program steps: | Courtesy of: | Joerg Woerner |

This Canon F-720 added a two-line display with formuly entry to the functions known from its predecessor F-700.

Dismantling
this powerful calculator is somewhat disappointing. There is no hint to the true
manufacturer of this OEM-calculator.

Running Mike Sebastian's "Calculator
forensics" reveals the Canon F-720 as one of the
"new-generation" calculators using binary arithmetic instead of the
common BCD (Binary Coded Decimal) arithmetic to perform internal calculations.
According to the manual this calculator uses up to 24 digits of precision and we
get indeed the unbelievable result of 9.00000000005281641187...
running the forensics test.

If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, September 20, 2003. No reprints without written permission.