– E-25 –
ERROR AND CALCULATION RANGES
Errors
An error will occur if an operation exceeds the calculation
ranges, or if a mathematically illegal operation is attempted.
When an error occurs, pressing < (or >) automatically
moves the cursor back to the place in the equation where the
error occurred. Edit the equation or press ª to clear the
equation.
Error Codes and Error Types
Syntax error (Error 1):
• An attempt was made to perform an invalid operation.
Ex. 2 @{
Calculation error (Error 2):
• The absolute value of an intermediate or final calculation result
equals or exceeds 10
100
.
• An attempt was made to divide by 0.
• The calculation ranges were exceeded while performing calcu-
lations.
Depth error (Error 3):
• The available number of buffers was exceeded. (There are 10
buffers* for numeric values and 24 buffers for calculation
instructions).
*5 buffers in STAT mode.
• Data items exceeded 100 in the statistics mode.
Equation too long (Error 4):
• The equation exceeded its maximum input buffer (142 charac-
ters).
An equation must be shorter than 142 characters.
Calculation Ranges
• Within the ranges specified, this calculator is accurate
to ±1 of the least significant digit of the mantissa. How-
ever, a calculation error increases in continuous calcu-
lations due to accumulation of each calculation error.
(This is the same for y
x
,
x
¿
,
e
x
,
ln
, etc., where continu-
ous calculations are performed internally.)
Additionally, a calculation error will accumulate and
become larger in the vicinity of inflection points and
singular points of functions.
• Calculation ranges
±10
–99
~ ±9.999999999×10
99
and 0.
If the absolute value of an entry or a final or intermediate
result of a calculation is less than 10
–99
, the value is consid-
ered to be 0 in calculations and in the display.
509E_en0610.p65 04.6.10, 2:52 PM25
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