TI BA-35 Solar Quick Reference Manual
BA-35 Solar Quick Reference Guide
Table of Contents
General Information
The Display
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Arithmetic Operations
Correcting Errors
Display Formats
Memory Operations
Math Operations
Percentage Calculations
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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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2
4
6
7
8
9
10
12
13
14
16
18
23
24
27
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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1
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.
—Turns on the calculator.
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
—Enables you to
(Second Function)
perform the “second” functions that are marked
over some of the keys. To perform a second
function, press
and then the appropriate
0
function key.
When you press
0
2nd
,
appears in the
display until you press another key.
If you press
and then a key that does not
0
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
—Clears the calculator
(All Clear/On)
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
—Clears any
(Clear Mode Registers)
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
g
The display shows a maximum of 10 digits,
although the calculator internally retains a
maximum
Display Indicators
Indicator Meaning
nd The calculator will access the
of 13 digits.
second function of the next
key pressed (appears when
you press
0
).
FIN The calculator is in the
financial mode.
STAT The calculator is in the
statistics mode.
Note:
No indicator displays
when the calculator is in
profit margin mode.
Begin The calculator computes
annuities as be
inning-ofperiod payments rather than
end-of-period payments.
(Displayed only in the
financial mode.)
(continued)
4
Indicator Meaning
g
g
g
g
InDep The displayed result is for
the independent variables
(x values). (Displayed only in
the statistics mode.)
Dep The displayed result is for
the dependent variables
(y values). (Displayed only in
the statistics mode.)
prn The value in the display is
the summed principal over a
ran
e of payments.
(Displayed only in the
financial mode.)
prn The value in the display is
the principal for a sin
le
payment. (Displayed only in
the financial mode.)
int The value in the display is
the summed interest over a
ran
e of payments.
(Displayed only in the
financial mode.)
int The value in the display is
the interest for a sin
le
payment. (Displayed only in
the financial mode.)
5
Arithmetic Operations
Entering Numbers
6
- ?
(Digits)
—Enter digits into the display.
You can enter a maximum of 10 digits and a
decimal point.
(Decimal Point)
A
@
(Change Sign)
—Enters a decimal point.
—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.
(Equals)
l
—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
(x Exchange y)
w
—Exchanges the values
-
twice.
of x and y. If you enter x and y in the incorrect
order, press
to reverse them. Then
w
complete the calculation.
(Backspace)
v
—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 ]
can correct the operation by pressing
by mistake, you
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
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.
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
c A
.
0
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.
(Store)
r
value in the memory, replacing any value
previously stored there. When 0 is displayed,
—Stores the displayed numeric
you can clear the memory by pressing
r
,
thereby storing a zero in memory.
t
—Adds the displayed numeric value
(Sum)
to the contents of the memory.
To add a series of numbers to the memory, use
to store the first number (thereby replacing
r
any previous value). Then use
remaining numbers. Use
s 0 P
t
with the
to
display the total.
To subtract the displayed value from the value
in memory, press
displayed value) and then press
0 P
s 0 P
to display the total.
(Recall Memory)
(to change the sign of the
@
. Use
t
—Displays
s
(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.
0 G
(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
(Percent)
E
add-ons, discounts, and percentage ratios.
—Calculate percentages,
Key
Operation
Percentage
dd-On
Discount
Percentage
Sequence Function
n E
n
l
Calculates n%
of the principal
amount.
n E
p
l
Calculates n%
of the principal
amount and
adds the result
to the principal.
o
n E
l
Calculates n%
of the principal
amount and
subtracts the
result from the
principal.
m
n E
l
Divides the
Ratio
principal
amount by n%.
12
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