BA-35 Solar Quick Reference Guide
Table of Contents |
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General Information .......................... |
2 |
The Display ................................... |
4 |
Arithmetic Operations ........................ |
6 |
Correcting Errors ............................. |
7 |
Display Formats .............................. |
8 |
Memory Operations .......................... |
9 |
Math Operations.............................. |
10 |
Percentage Calculations ..................... |
12 |
Percentage Change Calculations............ |
13 |
Margin and Markup Calculations ............ |
14 |
Compound Interest Calculations............. |
16 |
Annuity Calculations.......................... |
18 |
Converting to EFF or APR ................... |
23 |
Balance, Interest, and Principal.............. |
24 |
Statistics ...................................... |
27 |
Common Keystroke Sequences ............. |
30 |
Error Conditions .............................. |
35 |
In Case of Difficulty........................... |
37 |
TI Product Service and Warranty |
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Information................................. |
38 |
© 1996 by Texas Instruments Incorporated
1
General Information
Turning the Calculator On and Off
u (All Clear/On)—Turns on the calculator.
This key also clears the display, all pending operations, and values in memory or the mode registers.
The calculator turns off automatically when the solar cell panel is no longer exposed to light.
Modes
The calculator can operate in three different modes. Setting the calculator to a particular mode prepares it to perform special functions. The available modes are statistics, financial, and profit margin.
Indicators in the display tell you the calculator's current mode. STAT displays for statistics, FIN for financial. No indicator is displayed for profit margin mode.
2—Changes the calculator to the next mode in sequence. To set the calculator to a particular mode, press 2 repeatedly until the appropriate indicator is displayed.
Changing to a new mode clears the contents of the mode registers.
You can do arithmetic, mathematical, and percentage operations in any mode.
2
Second Functions
0 (Second Function)—Enables you to perform the “second” functions that are marked over some of the keys. To perform a second function, press 0 and then the appropriate function key.
When you press 0, 2nd appears in the display until you press another key.
If you press 0 and then a key that does not have a second function, the key performs its normal function. If you accidentally press 0, press it again to cancel its effect.
Clearing the Calculator
u (All Clear/On)—Clears the calculator completely, including the display, all pending operations, and the memory and mode registers. Pressing u also sets the calculator to floating-decimal format and financial mode.
- (Clear Entry/Clear)—Clears incorrect entries, error conditions, the display, or pending operations. It does not affect the memory, the mode registers, or the display format.
0 b (Clear Mode Registers)—Clears any values that have been stored in the mode registers.
Note: Changing to a new mode also clears the contents of the mode registers.
3
The Display
The display shows a maximum of 10 digits, although the calculator internally retains a maximum of 13 digits.
Display Indicators
Indicator |
Meaning |
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2nd |
The calculator will access the |
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second function of the next |
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key pressed (appears when |
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you press 0). |
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FIN |
The calculator is in the |
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financial mode. |
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STAT |
The calculator is in the |
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statistics mode. |
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Note: No indicator displays |
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when the calculator is in |
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profit margin mode. |
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Begin |
The calculator computes |
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annuities as beginning-of- |
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period payments rather than |
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end-of-period payments. |
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(Displayed only in the |
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financial mode.) |
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(continued) |
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4
Indicator |
Meaning |
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InDep |
The displayed result is for |
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the independent variables |
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(x values). (Displayed only in |
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the statistics mode.) |
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Dep |
The displayed result is for |
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the dependent variables |
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(y values). (Displayed only in |
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the statistics mode.) |
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Gprn |
The value in the display is |
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the summed principal over a |
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range of payments. |
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(Displayed only in the |
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financial mode.) |
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prn |
The value in the display is |
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the principal for a single |
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payment. (Displayed only in |
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the financial mode.) |
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Gint |
The value in the display is |
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the summed interest over a |
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range of payments. |
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(Displayed only in the |
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financial mode.) |
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int |
The value in the display is |
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the interest for a single |
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payment. (Displayed only in |
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the financial mode.) |
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5
Arithmetic Operations
Entering Numbers
6 - ? (Digits)—Enter digits into the display. You can enter a maximum of 10 digits and a decimal point.
A (Decimal Point)—Enters a decimal point.
@ (Change Sign)—Changes the sign of the number in the display. To enter a negative number, first enter the number as a positive value and then press @.
Arithmetic Keys
p, o, n, m—Perform the arithmetic operations of addition, subtraction, multiplication, and division.
l (Equals)—Completes all pending operations and displays the result of a calculation.
6
Correcting Errors
Correcting Entry Errors
- (Clear Entry/Clear)—To clear a numerical entry, press - once; then enter the correct number. To clear all pending operations and begin the calculation again, press - twice.
w (x Exchange y)—Exchanges the values of x and y. If you enter x and y in the incorrect order, press w to reverse them. Then complete the calculation.
v (Backspace)—Removes the last digit or decimal point from the displayed number if you have not yet pressed an operation key (p, o, n, m, etc.). This key is useful for correcting entry errors without having to clear the display and start again.
Correcting Immediate Functions
You can often correct an immediate function by performing the “reverse” operation. For example, if you press 0 ] by mistake, you can correct the operation by pressing 0 k.
7
Display Formats
Floating-Decimal Format
The calculator normally displays numbers in “standard” floating-decimal format, in which numbers are displayed in the range -9,999,999,999 to -0.000000001, 0, or 0.000000001 to 9,999,999,999. If the result of a calculation is too large or too small to be displayed in the normal format, it is displayed in scientific notation. This means the result is expressed as a base value (mantissa) times 10 raised to a power (exponent). For example, 5.9 12 means 5.9 x 1012.
The calculator is always in floating-decimal format when you turn it on. By changing the display format, you can convert a number from one format to another.
0 c (Fixed Decimal)—Enables you to set the number of decimal places displayed in a result.
§To set the number of decimal places, press 0 c and then press the appropriate digit key (6-?).
§To remove the fixed-decimal setting and restore floating-decimal format, press 0 c A.
If a result has more than the selected number of decimal places, the displayed number is rounded. If a result has fewer than the selected number of decimal places, trailing 0s are added.
8
Memory Operations
The memory can store any numeric value within the range of the calculator. You can use the calculator’s memory to store, sum, and recall a numeric value. You can use the memory in any mode.
r (Store)—Stores the displayed numeric value in the memory, replacing any value previously stored there. When 0 is displayed, you can clear the memory by pressing r, thereby storing a zero in memory.
t (Sum)—Adds the displayed numeric value to the contents of the memory.
To add a series of numbers to the memory, use r to store the first number (thereby replacing any previous value). Then use t with the remaining numbers. Use s 0 P to display the total.
To subtract the displayed value from the value in memory, press @ (to change the sign of the displayed value) and then press t. Use s 0 P to display the total.
s 0 P (Recall Memory)—Displays (recalls) the number stored in memory, without affecting the contents of the memory.
9
Math Operations
0 \ (Reciprocal)—Calculates the reciprocal of the displayed number, which is the same as one divided by the number.
0 ] (Square)—Raises the displayed
number to the second power, which is the same as multiplying the number by itself. The number can be any value whose square is in the range of the calculator.
0 k (Square Root)—Calculates the square root of the displayed number. The displayed number must be positive or zero; otherwise, an error condition occurs. The result is always positive.
0 H (Universal Power)—Raises any positive number to any power within the range of the calculator or calculates any root of any positive number within the range of the calculator.
To calculate a power:
1.Enter the number (y) that you want to raise to a power.
2.Press 0 H.
3.Enter the power (x).
4.Press l or any key that completes the operation.
10
To calculate a root:
1.Enter the number (y) whose root you want to find.
2.Press 0 H.
3.Enter the root (x).
4.Press 0 \.
5.Press l or any key that completes the operation.
0G (Natural Logarithm)—Calculates the natural logarithm (base e = 2.718281828459) of the displayed number. The number must be positive; otherwise, an error condition occurs.
0^ (Natural Antilogarithm)— Calculates the natural antilogarithm of the displayed number. This is equivalent to the value of e raised to the power of the number in the display.
11
Percentage Calculations
E (Percent)—Calculate percentages, add-ons, discounts, and percentage ratios.
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Key |
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Operation |
Sequence |
Function |
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Percentage |
n n E l |
Calculates n% |
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of the principal |
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amount. |
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Add-On |
p n E l |
Calculates n% |
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of the principal |
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amount and |
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adds the result |
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to the principal. |
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Discount |
o n E l |
Calculates n% |
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of the principal |
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amount and |
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subtracts the |
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result from the |
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principal. |
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Percentage |
m n E l |
Divides the |
Ratio |
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principal |
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amount by n%. |
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12
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