Texas instruments BA-35 SOLAR Quick Reference Guide
BA-35 Solar Quick Reference Guide
Table of Contents
General Information
The Display
Arithmetic Operations
Correcting Errors
Display Formats
Memory Operations
Math Operations
Percentage Calculations
Percentage Change Calculations
Margin and Markup Calculations
Compound Interest Calculations
Annuity Calculations
Converting to EFF or APR
Balance, Interest, and Principal
Statistics
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Common Keystroke Sequences
Error Conditions
In Case of Difficulty
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TI Product Service and Warranty
Information
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© 1996 by Texas Instruments Incorporated
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General Information
Turning the Calculator On and Off
(All Clear/On)
u
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.
—Changes the calculator to the next
2
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.
—Turns on the calculator.
2
Second Functions
(Second Function)
0
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,
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
(All Clear/On)
u
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)
-
entries, error conditions, the display, or pending
operations. It does not affect the memory, the
mode registers, or the display format.
0 b
values that have been stored in the mode
registers.
Note:
contents of the mode registers.
.
(Clear Mode Registers)
Changing to a new mode also clears the
—Enables you to
2nd
appears in the
—Clears the calculator
—Clears incorrect
—Clears any
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The Display
2
g
The display shows a maximum of 10 digits,
although the calculator internally retains a
maximum
Display Indicators
Indicator Meaning
FIN The calculator is in the
STAT The calculator is in the
Begin The calculator computes
of 13 digits.
nd The calculator will access the
second function of the next
key pressed (appears when
you press 0).
financial mode.
statistics mode.
Note:
No indicator displays
when the calculator is in
profit margin mode.
annuities as be
period payments rather than
end-of-period payments.
(Displayed only in the
financial mode.)
inning-of-
(continued)
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Indicator Meaning
G
g
g
G
g
g
InDep The displayed result is for
Dep The displayed result is for
prn The value in the display is
prn The value in the display is
int The value in the display is
int The value in the display is
the independent variables
(x values). (Displayed only in
the statistics mode.)
the dependent variables
(y values). (Displayed only in
the statistics mode.)
the summed principal over a
e of payments.
ran
(Displayed only in the
financial mode.)
the principal for a sin
payment. (Displayed only in
the financial mode.)
the summed interest over a
e of payments.
ran
(Displayed only in the
financial mode.)
the interest for a sin
payment. (Displayed only in
the financial mode.)
le
le
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Arithmetic Operations
Entering Numbers
(Digits)
- ?
6
You can enter a maximum of 10 digits and a
decimal point.
(Decimal Point)
A
(Change Sign)
@
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
operations of addition, subtraction,
multiplication, and division.
(Equals)
l
and displays the result of a calculation.
—Enter digits into the display.
—Enters a decimal point.
—Changes the sign of the
—Perform the arithmetic
—Completes all pending operations
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Correcting Errors
Correcting Entry Errors
(Clear Entry/Clear)
-
entry, press - once; then enter the correct
number. To clear all pending operations and
begin the calculation again, press - twice.
(x Exchange y)
w
of x and y. If you enter x and y in the incorrect
order, press w to reverse them. Then
complete the calculation.
(Backspace)
v
decimal point from the displayed number if you
have not yet pressed an operation key (p, o,
, etc.). This key is useful for correcting
n, m
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.
—To clear a numerical
—Exchanges the values
—Removes the last digit or
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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 10
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.
(Fixed Decimal)
0 c
the number of decimal places displayed in a
result.
§
To set the number of decimal places, press
0 c
key (6-?).
§
To remove the fixed-decimal setting and
restore floating-decimal format, press
.
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.
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.
—Enables you to set
and then press the appropriate digit
0
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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.
(Store)
r
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
to the contents of the memory.
To add a series of numbers to the memory, use
r
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
0 P
s 0 P
(recalls) the number stored in memory, without
affecting the contents of the memory.
—Stores the displayed numeric
(Sum)
—Adds the displayed numeric value
to store the first number (thereby replacing
to display the total.
(Recall Memory)
—Displays
s
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Math Operations
(Reciprocal)
0 \
reciprocal of the displayed number, which is the
same as one divided by the number.
(Square)
0 ]
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.
(Square Root)
0 k
root of the displayed number. The displayed
number must be positive or zero; otherwise, an
error condition occurs. The result is always
positive.
(Universal Power)
0 H
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.
—Calculates the
—Raises the displayed
—Calculates the square
—Raises any
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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.
(Natural Logarithm)
0 G
natural logarithm (base e = 2.718281828459) of
the displayed number. The number must be
positive; otherwise, an error condition occurs.
(Natural Antilogarithm)
0 ^
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.
—Calculates the
— Calculates
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Percentage Calculations
A
(Percent)
E
add-ons, discounts, and percentage ratios.
Operation
Percentage
dd-On
Discount
Percentage
Ratio
—Calculate percentages,
Key
Sequence Function
n
p
o
m
n E
n E
n E
n E
l
l
l
l
Calculates n%
of the principal
amount.
Calculates n%
of the principal
amount and
adds the result
to the principal.
Calculates n%
of the principal
amount and
subtracts the
result from the
principal.
Divides the
principal
amount by n%.
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