Casio D-120F, J-120F - Desktop Calculator User's Guide

• Be sure to keep all user documentation handy for future reference.
• In this User's Guide, some key notations are shown in simplified form.
  

Important Precautions

• If you suspect that the calculator is operating abnormally due to static electrical charge or some other problem, press to restore normal operation.
• Avoid dropping the calculator and otherwise subjecting it to severe impact.
• Never bend or twist the case.
• Never try to take the calculator apart.
• Wipe the unit with a soft, dry cloth to clean it.
• Replacing the battery or blocking the calculator from sunlight while battery power is low may cause your rate setting or memory contents to be changed or lost. Replace the battery as soon as possible when it becomes weak and correct the rate setting, if necessary.
• The contents of these instructions are subject to change without notice.
• CASIO COMPUTER CO., LTD. assumes no responsibility for any loss or claims by third parties which may arise from the use of this product.

Power Supply

Two-Way Power System provides power even in complete darkness.

• Always leave battery replacement up to an authorized dealer.
• If display figures are difficult to read where lighting is dim, replace the battery as soon as possible.
• Even if you do not use the calculator, you should replace the battery at least once every 3 years.
• A dead battery can leak and damage the calculator if left in the battery compartment for long periods.
• The battery that comes with this unit discharges slightly during shipment and storage. Because of this, it may require replacement sooner than the normal expected battery life.

Auto Power Off Function

Auto power off: Approximately 6 minutes after last key operation

• To restore power, press .

Tax Calculations

To set a tax rate

• You can check the currently set tax rate by pressing and then .

Currency Conversion

To toggle between the Memory Mode (A) and the Conversion Mode (B)

To set conversion rates

Currency 1 (C1) is your home country currency, and so it is always set to 1. Currency 2 (C2) and Currency 3 (C3) are for two other currencies, and you can change these rates as required.

• You can check a currently set conversion rate by pressing and then or .

*¹ For rates of 1 or greater, you can input up to six digits. For rates less than 1 you can input up to your calculator's maximum number of digits, including 0 for the integer digit and leading zeros (though only six significant digits, counted from the left and starting with the first non-zero digit, can be specified).
Examples: 0.123456, 0.0123456

Specifications

Power Supply: Two-Way Power System, with solar cell and one button type battery (LR44)

Battery Life: Approximately 3 years (1 hour operation per day)

Operating Temperature: 0°C to 40°C (32°F to 104°F)

Dimensions: D-120F: 30.9 (H) × 126 (W) × 179 (D) mm (1³/16"H × 4¹⁵/16"W × 7¹/16"D)
J-120F: 23 (H) × 108 (W) × 181.5 (D) mm (⁷/8"H × 4¹/4"W × 7¹/8"D)

Weight: D-120F: Approximately 165 g (5.8 oz), including battery
J-120F: Approximately 140 g (4.9 oz), including battery

Operations

*² If the "EXCH" indicator is displayed, press and confirm that "EXCH" is not displayed.

*³ recalls the value stored (accumulated) in grand total memory.

• "E" (Error) will appear if the calculation result exceeds the upper calculation limit of the calculator. If this happens, press .
• The value displayed when a calculation error occurs is a rough approximate value.
  Example: If 1.23 is displayed along with "E", it indicates a value of approximately 1.23 × 10¹².

Clearing Calculations

• To clear the calculator except for independent memory and rate settings, press .
• To clear independent memory only, press twice.

Tax rate

*⁴ Price-less-tax

^*5 Price-plus-tax

^*6 Tax

Conversion Rate Setting

C1 ($) = 1, C2 (EUR) = 0.9, C3 (GBP) = 0.75

*⁷ If there is no "EXCH" indicator displayed, press to display it.

Conversion Calculation Formulas