CASIO MS 100 TER II - Calculator

MS 100 TER II - Calculator CASIO - Free user manual and instructions

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Notice CASIO MS 100 TER II - page 9
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Product TypeDesktop Calculator
Number of Digits Displayed10 digits
Display TypeLCD
Power SupplySolar Panel + LR54 Button Battery
Number of Batteries1 LR54 Battery (LR1130)
Battery Life3 years
Dimensions (L x W x H)103 x 147 x 29 mm
Weight115 g
ColorBlack
Case MaterialMetallic
Number of Keys30 keys
Independent Memory3 memory keys (M+, M-, MR)
Thousands SeparatorYes
Double ZeroYes (00 key)
Sign ChangeYes (+/- key)
Digit-by-Digit CorrectionYes (DEL key)
Percentage CalculationYes
Currency ConversionYes (euro and currencies)
Included AccessoriesProtective Case

Frequently Asked Questions - MS 100 TER II CASIO

What battery should be used in the CASIO MS-100TER II?
The calculator operates with a button cell battery type LR54 (also noted as LR1130 or AG10). Only one battery is needed. It is housed under a cover at the back of the device and its lifespan is about 3 years under normal use.
Does the calculator work without a battery thanks to the solar panel?
Yes, the MS-100TER II has a dual power supply. The solar panel is sufficient to power the calculator in a well-lit environment. The battery takes over in case of insufficient light, such as in a dark room.
How to correct an input error before validating?
Use the DEL key (backspace) to erase the last digit entered without canceling the entire ongoing calculation. To erase everything, press C (or AC to reset completely, including memory).
How to use the percentage function on this calculator?
Enter the base number, press + or -, enter the desired percentage, then press %. For example: 200 + 20% directly gives 240. To calculate a standalone percentage, type the amount, multiply by the rate, then press %.
How does the currency conversion work?
The MS-100TER II includes a euro/currency conversion function. You must first record the exchange rate via the dedicated key, then use the conversion keys to switch from one currency to another. Refer to the provided manual for the exact sequence of rate programming.
How to use the memory keys (M+, M-, MR)?
M+ adds the displayed result to the memory. M- subtracts the displayed result from the memory. MR recalls the value stored in memory. An M indicator appears on the screen as long as a value is in memory. Press MC (or MR twice depending on the model) to clear the memory.
What is the use of the thousands separator on the MS-100TER II?
The thousands separator automatically displays a dot (or a comma depending on the settings) every 3 digits in large numbers. This facilitates reading large amounts, for example, 1,250,000 instead of 1250000. This function is active by default.
How to use the double zero (00) key?
The 00 key allows entering two zeros with a single press, which is convenient for quickly entering amounts in hundreds or thousands. For example, to type 50,000, press: 5, 00, 00.
How to invert the sign of a displayed number?
Press the +/- key to toggle the displayed number from positive to negative (or vice versa). This is useful for subtracting a result or calculating a negative value without re-entering the number.
Is the protective case included in the box?
Yes, the CASIO MS-100TER II comes with a protective case. It fits on the front of the calculator to protect the keyboard and screen during transport or storage.
What are the dimensions and weight of the MS-100TER II?
The calculator measures 103 mm in width, 147 mm in depth, and 29 mm in height. It weighs 115 g, including the case and battery. Its metal casing gives it good robustness for everyday office use.
Is the LCD display readable in all conditions?
The 10-digit LCD screen offers good readability in normal lighting conditions. In very low light, the screen remains readable because it is not backlit but the liquid crystal digits remain contrasted. Place the calculator under a desk lamp for optimal comfort.

User questions about MS 100 TER II CASIO

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How do I turn off the CASIO MS 100 TER II calculator?
Frequently Asked Questions - 22/01/2026
Response Notice-Facile

To turn off your CASIO MS 100 TER II calculator, follow these simple steps:

  • Locate the OFF button on your calculator. It is usually located near the ON button.
  • Press the OFF button once. This will immediately turn off the calculator.

Note that this calculator does not turn off automatically, so it is important to turn it off manually to save battery.

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How to change the battery of the CASIO MS 100 TER II calculator?
Frequently Asked Questions - 09/12/2025
Response Notice-Facile

To change the battery of your CASIO MS 100 TER II calculator, follow these simple steps:

  1. Turn off the calculator to avoid any short circuit or damage.
  2. Turn the calculator over to locate the battery compartment, usually located at the back.
  3. Open the compartment by unscrewing or unclipping the cover using a small screwdriver or a suitable tool, being careful not to damage the casing.
  4. Remove the old battery noting its orientation (the positive and negative sides).
  5. Insert the new battery of the same type (often a button cell LR44 or equivalent) while respecting the correct orientation.
  6. Close the compartment by putting the cover back in place and securing it.
  7. Turn on the calculator to check that the new battery works properly.

This operation helps keep your calculator operational and avoids interruptions during its use.

Respond (be the first)

Download the instructions for your Calculator in PDF format for free! Find your manual MS 100 TER II - CASIO and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. MS 100 TER II by CASIO.

USER MANUAL MS 100 TER II CASIO

1/General Guide 2
2/ Correcting Input Errors 3
3/Power Supply 4
4/Important Precautions 5
5/ Specifications 6
6/Euro Currency Conversion 7
7/Tax Calculations 9
8/Example Calculations 137
9/Currency Conversion Examples 165
10/Tax Calculation Examples (Tax Rate = 5% 181

IMPORTANT!

  • Please keep your manual and all information handy for future reference.
  • The switches and keys available on your calculator depend on its model number. Be sure to check the calculator itself to see if explanations in this User's Guide apply to your calculator model.

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CASIO MS 100 TER II - IMPORTANT! - 1

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1/General Guide

About the Selectors

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Rounding Selector (D-20TER/DF-120TER/JF-120TER)

Specifies the rounding system.

F: Floating decimal point system, which displays the value without rounding.

CUT: Cuts off the decimal to the specified* number of places.

5/4: Rounds off the decimal to the specified* number of places.

  • Use the Decimal Place Selector to specify the number of decimal places.

CASIO MS 100 TER II - Rounding Selector (D-20TER/DF-120TER/JF-120TER) - 1

Decimal Place Selector (D-20TER/DF-120TER/JF-120TER)

Specifies the number of decimal places for rounding. Note that the Decimal Place Selector is valid whenever the Rounding Selector is in any position other than F.

4, 3, 2, 1, 0: Number of decimal places for the CUT and 5/4 settings of the Rounding Selector.

ADD_2 : The "Add Mode" automatically adds a decimal point and two decimal places to all values, even if you don't input a decimal point. This mode is very useful when performing calculations in dollars or other monetary systems that require two decimal places. Two decimal places are not added in this mode if you press the key while inputting a value, or for any operation other than addition and subtraction.

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CASIO MS 100 TER II - Decimal Place Selector (D-20TER/DF-120TER/JF-120TER) - 1

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CASIO MS 100 TER II - Decimal Place Selector (D-20TER/DF-120TER/JF-120TER) - 4

About the Display

:3-digit separator (apostrophe)
- : Negative value indicator
GT: Grand total memory indicator (D-20TER/DF-120TER/JF-120TER)
M : Independent memory indicator
E : Error indicator
K : Constant calculation indicator

Euro : Euro currency indicator
Local : Local currency indicator
RATE : Conversion rate indicator
TAX : Tax amount indicator
TAX + : Price-plus-tax indicator
TAX- : Price-less-tax indicator
+ - × ÷ : Arithmetic operation indicators

CASIO MS 100 TER II - About the Display - 1

2/Correcting Input Errors

To completely clear a value you have just input, press C
- To shift a displayed value digit-by-digit to the right, press until you get to the digit you want to re-input from. (MS-88TER)
- If you press the wrong arithmetic operation key (, , , ) , simply press the correct key before inputting anything else.

Clearing Calculations

  • To clear the calculator except for the independent memory, press AC.
  • To clear the independent memory only, press MRC twice.

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■ Error Indicator

If the error indicator "E" appears on the display, press C to clear the error and continue with the calculation, or AC to clear the entire calculation.

3/Power Supply

The Two-Way Power System of this calculator uses a solar cell, in addition to one LR44 or LR54 (LR1130) button type battery. Unlike calculators equipped with a solar cell only, you can use this calculator under virtually any lighting conditions, as long as there is enough light for you to read the display.

Battery Replacement

Do not try to replace the battery yourself. Have it replaced by an authorized CASIO dealer or service center.

If the display becomes dim and difficult to read, or if nothing appears on the display when you press AC (especially when lighting is dim), you probably need to have the battery replaced.

  • A dead battery can leak and damage the calculator if left in the battery compartment for long periods.

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CASIO MS 100 TER II - Battery Replacement - 1

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  • 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

This calculator is not equipped with an OFF switch. Instead, it switches power off automatically about six minutes after the last key operation is performed. To restore power, press AC.
- When you press AC, the independent memory contents are not cleared.

4/Important Precautions

CASIO MS 100 TER II - 4/Important Precautions - 1

  • Avoid dropping the calculator and otherwise subjecting it to severe impact.
  • Never try to take the calculator apart.
  • Wipe the unit with a soft, dry cloth to clean it.
  • 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.

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5/Specifications

Power Supply:

D-20TER/DF-120TER/JF-120TER:

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

MS-88TER/MS-100TER/MS-120TER/SL-310TER/SL-320TER:

Two-Way Power System, with solar cell and one button type battery (LR54 (LR1130))

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

Operating Temperature: 0^ to 40^ (32^ to 104^)

Dimensions:

D-20TER: 32(H)× 151(W)× 158(D) mm (1^1 / 4^ × 5^15 / 16^ × 6^1 / 4^ )

DF-120TER: 36 (H) × 126 (W) × 175 (D) mm (17/16"H × 415/16"W × 67/8"D)

JF-120TER: 29.3 (H) × 107 (W) × 175.5 (D) mm (1^1 / 8^nH× 4^3 / 16^nW× 6^15 / 16^nD)

MS-88TER/MS-100TER/MS-120TER:

30.7 (H) × 103 (W) × 145 (D) mm (1^3 / 16^ × 4^1 / 16^ × 5^11 / 16^ )

SL-310TER/SL-320TER:

7.5 (H) × 70 (W) × 118.5 (D) mm ( 5/16 "H × 2^3/4 "W × 4^11/16 "D)

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CASIO MS 100 TER II - Dimensions: - 1

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Weight:

D-20TER/DF-120TER:

Approximately 195g (6.9 oz) (including the battery)

JF-120TER: Approximately 165 g (5.8 oz) (including the battery)

MS-88TER/MS-100TER/MS-120TER:

Approximately 120g (4.2 oz) (including the battery)

SL-310TER/SL-320TER:

Approximately 55g (1.9 oz) (including the battery)

CASIO MS 100 TER II - Weight: - 1

6/Euro Currency Conversion

  • Pressing AC to clear the calculation memory does not clear the conversion rate setting.

Setting a Conversion Rate

Example: To set the conversion rate for your local currency as 1 euro = 1.95583 DM (Deutsche marks).

  1. Press AC

  2. Hold down Euro rate set for about two seconds and the currently set rate appears on the display.

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CASIO MS 100 TER II - Setting a Conversion Rate - 1

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  1. Input the conversion rate (1.95583) and then press EURO RATE SEI to store it in memory.*

CASIO MS 100 TER II - Setting a Conversion Rate - 5

  • For rates of 1 or greater, you can input up to six digits. For rates less than 1 you can input up to 8, 10 or 12 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, 0.0012345 (MS-88TER)

  • You can check the currently set rate at any time by pressing AC and then EURO.
  • The rate is retained in memory even when calculator power is turned off by operation of Auto Power Off.

CASIO MS 100 TER II - Setting a Conversion Rate - 6

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CASIO MS 100 TER II - Setting a Conversion Rate - 9

7/Tax Calculations

  • Pressing AC to clear the calculation memory does not clear independent memory or the tax rate setting.

Setting a Tax Rate

Example: Tax rate = 5%

CASIO MS 100 TER II - Setting a Tax Rate - 1
(about two seconds)
Current rate setting

CASIO MS 100 TER II - Setting a Tax Rate - 2

(You can input a value up to 6 digits long.)

CASIO MS 100 TER II - Setting a Tax Rate - 3

CASIO MS 100 TER II - Setting a Tax Rate - 4

CASIO MS 100 TER II - Setting a Tax Rate - 5

(Stores rate and completes operation.)

  • You can check the currently set rate at any time by pressing AC and then .

CASIO MS 100 TER II - Setting a Tax Rate - 6

CASIO MS 100 TER II - Setting a Tax Rate - 7

  • The rate is retained in memory even when calculator power is turned off by operation of Auto Power Off.

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Input the number you want to use as a constant, and then press one of the arithmetic keys twice. This causes the "K" indicator to appear on the display, indicating constant calculations.

Cáculos con constantes

√4 × 5 = 10“F”4√×5=10.

CASIO MS 100 TER II - Cáculos con constantes - 1

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CASIO MS 100 TER II - Cáculos con constantes - 2

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Percent Calculations
Calculs de pourcentagees
Calcoli di percentuali
Percentageberekeningen
Prosentimärä
Cáculos de percentagem
Száralékszámítások
Obliczenia procentów

Cáculos de percentajes
■ Prozentrechnungen
Procentraknin
■ Prosentberegning
Procentudregning
BbIuNCHeHc npoEHTaM
Vypocty's procenty

CASIO MS 100 TER II - Cáculos con constantes - 6

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CASIO MS 100 TER II - Cáculos con constantes - 12

% change / \% de cambio / \% de change /

M+ Adds the displayed value to independent memory.
M- Subtracts the displayed value from independent memory.
MRC Recalls and clears independent memory.

  • Add the calculated result to grand total memory.
    Recalls the value stored (accumulated) in grand total memory.
    AC Clears the grand total memory.
  • Grand total memory contents are cleared when power is switched off by the Auto Power Off function.

■ Memoria de total general (D-20TER/DF-120TER/JF-120TER)

7.8 × 89 = 694.2“F”MRCMRCAC 7.8 M+ X 89GT M694.2
4.56 × 23 = 104.88
12.36799.08

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 1

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 2

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 3

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 4

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 5

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 6

CASIO MS 100 TER II - ■ Memoria de total general (D-20TER/DF-120TER/JF-120TER) - 7

Complies with (CE) Rule No. 1103/97

The number of significant digits of this product is 11.
- Errors may be generated in currency conversion calculations that produce results greater than the values shown below.

€1.00 =€ → Local*Local* → €
DEM1.95583511,291,881.19 → 999,999,999.991,955,830,000.00 → 1,000,000,000.00
FRF6.55957152,449,017.23 → 999,999,999.956,559,570,000.00 → 1,000,000,000.00
ITL1936.2751,645,689.90 → 99,999,999.983999,999,999,999 → 516,456,899.09
ESP166.386601,012,104.38 → 99,999,999,999166,386,000,000 → 1,000,000,000.00
NLG2.20371453,780,216.08 → 999,999,999.982,203,710,000.00 → 1,000,000,000.00
BEF40.33992,478,935,247.71 → 99,999,999,99940,339,900,000 → 1,000,000,000.00
PTE200.482498,797,897.06 → 99,999,999,998200,482,000,000 → 1,000,000,000.00
ATS13.760372,672,834.16 → 999,999,999.8913,760,300,000.00 → 1,000,000,000.00
FIM5.94573168,187,926.46 → 999,999,999.995,945,730,000.00 → 1,000,000,000.00
IEP0.7875641,269,738,078.42 → 999,999,999.99787,564,000.00 → 1,000,000,000.00
LUF40.33992,478,935,247.71 → 99,999,999,99940,339,900,000 → 1,000,000,000.00
  • Local Currency/Divisa local/Devise locale/Örtliche Währung/Valuta locale/Lokal valuta/Plaatselijke valuta/Lokal valuta/Paikallinen valutta/Lokal valuta/Moeda local/Mecthar baniota/Helyi valuta/Mistni měna/Valuta krajowa

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CASIO MS 100 TER II - Complies with (CE) Rule No. 1103/97 - 1

CASIO MS 100 TER II - Complies with (CE) Rule No. 1103/97 - 2

CASIO MS 100 TER II - Complies with (CE) Rule No. 1103/97 - 3

MS-100TER/MS-120TER/SL-310TER/SL-320TER

Conforme au reglement (CE) No. 1103/97

  1. Original costs = 3.00,5.00, $8.00

Calculate the total cost, price-plus-tax, and tax amount.

  1. Costos originales = 3,00,5,00, $8,00
  1. Costi originali = 3,00,5,00, $8,00
  1. Custos originais = 3,00,5,00, $8,00
  1. Koszty pierwotne = 3,00,5,00, $8,00
  1. Price-plus-tax = $100

Calculate price-less-tax and tax amount.

  1. Prix taxes comprises = 100 $

4. Taxable item = 30.00 Non-taxable item =2

Calculate price-plus-tax for taxable item and total of taxable and non-taxable items.

4. Articulo imponible = $30,00

Articulo no imponible = $20,00

4. Article soumis aux taxes = 30,00 $

Article exonéré de taxes = 20,00

(Total of taxable item + non-taxable item)

First, calculate the price-plus-tax value of the taxable item, and then add the non-taxable item.

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Product information

Brand : CASIO

Model : MS 100 TER II

Category : Calculator