IZ1238M

3

E : error display

, : punctuation comma

M : non-zero memory indicator

C1, C2 : currency exchange operations indicator

Error detection

• System errors occur when:

1) The division by zero.

2) The extraction of square root of a negative number.

• Rough estimate calculation error occur when

The integral part of the result of any standard functions, percentage, square, reciprocal, or

power calculations exceed 8 digits.

Error indication

• System error

“0” is indicated in the 1-digit position and “E” in the sign-digit position.

• Rough estimate calculation error

The high-order 8-digit calculation result is indicated together with “E”.

The decimal point is indicated in the position corresponding to a calculation result of time 10

and no zero shift is performed

Error release

• System error

A system error can be release by the ON/C key.

• Rough estimate calculation error

A rough estimate calculation error can be released by the ON/C, CE key.

Number entry

Numerical can be entered up to 8 digits. Numerical entries equal to 9 digits or more are ignored.

Memory protection

In any error detection, the special memory content is retained when auto power off.

Key bounce protection

Front edge

Down to 1 word and up to about 3 words.

Trailing edge

9 words

1 word is 3.3ms when display frequency is fd = 100Hz.

Auto power OFF

Power automatically turns off after 9 - 11 minutes pass from the last key pressure. The special

memory content is saving when power auto off.