Oakton WD-35001-85 Tech Board Plus User manual

Operating Instructions
Thank you for purchasing a
WD-35001-85 Tech Board™ Plus —
the ultimate technical organizer!
It features:
• Full-function scientific
calculator
• A 24-hour count-up
stopwatch
• Real-time clock with
time of day and calendar
• Selectable audible alarm clock
• Common conversion
tables and a Periodic
Table of the Elements
for quick reference
• Sturdy clipboard
that tightly
holds your papers
• Paper guide that keeps
your papers neatly aligned
• Handy 30-cm ruler
© 198
OAKTONTBPlus Instructions 398
Table of contents:
1. Clock and Stopwatch buttons ..........................page 2
2. Time and Calendar functions............................page 2
3. Alarm functions ..................................................page 3
4. Stopwatch functions ..........................................page 3
5. Calculator functions ....................................pages 4-15
5.1. Care of your calculator ........................................................page 4
5.2. Basic calculator functions ..............................................pages 4-6
5.3. Memory functions..................................................................page 7
5.4. Algebraic functions ..........................................................pages 8-9
5.5. Trigonometric and geometric functions ....................pages 10-11
5.6. Statistical functions......................................................pages 12-13
5.7. Base system modes ............................................................page 14
5.8. Display symbols..................................................................page 15
6 Battery replacement ..........................................page 15
7. Specifications......................................................page 15
8. Index ....................................................................page 16
9. Warranty/Return of Items ................................page 16

2.1 How to enter time/calendar mode
1. Press MODE until the display scrolls to the time/calendar mode
(upper display will show one nonflashing day of the week).
2. To see the date, press START/STOP.
3. To see the alarm set time, press LAP/RESET.
NOTE: Unless the alarm indicator is on (upper right corner of the display),
the alarm will not sound at the shown time.
2.2 How to set time and calendar
1. Push MODE to scroll to time/calendar set mode (upper display will flash “TU”).
2. Press LAP/RESET to scroll between clock parameters.
The display scrolls through seconds, minutes, hours, day, month, day of week, then back to seconds.
3. When you have selected the parameter you want to change,
hold START/STOP to adjust the clock or calendar.
4. Repeat step 3 until you have selected the correct time and date.
NOTE: You can also select a 12-hour clock (a.m. and p.m.)
or a 24-hour clock. To select 12 or 24 hour time:
a. Scroll to the hours parameter.
b. Hold START/STOP until you reach the appropriate time scale.
The a.m./p.m. clock will display “A” or “P” in the seconds place;
the 24 hour clock will display “H” in the seconds place.
5. When you have selected the correct time and date, press MODE to return to the time/calendar display.
The clock and stopwatch are located on the right hand side of the TECH BOARD PLUS clip.
The power for the clock/stopwatch is always on.
The TECH BOARD PLUS clock/stopwatch features 3 main function buttons:
1. the MODE button
2. the START/STOP button
3. the LAP/RESET button
The MODE button lets you scroll through 4 operating modes:
1. Time/calendar mode
2. Stopwatch mode
3. Alarm set mode
4. Time/calendar set mode
The three buttons have different functions depending on the operating mode.
See the table below for a description of each button’s different functions per operating mode.
Operating mode: Time/Calendar mode Stopwatch mode Alarm Set mode Time/Calendar Set mode
MODE Press to: view time, date and alarm set time perform all stopwatch functions set or deactivate alarm set time and date
button You see: upper display shows current day upper display flashes “SU FR SA” upper display flashes “MO” upper display flashes “TU”
START/STOP Press to:
view the current date start and stop the stopwatch change the alarm set time change the time and date
button
LAP/RESET Press to:
view the alarm set time time split laps scroll through scroll through
button and reset stopwatch alarm set parameters time/date parameters
1. Clock and
Stopwatch
Buttons
2. Time and
Calendar
Functions
2
MODE
S
T
A
R
T
S
T
O
P
R
E
S
E
T
L
A
P
PM
TH

4.1 How to enter stopwatch mode
1. Press MODE until display scrolls to the stopwatch mode (upper display flashes “SU FR SA”).
2. If the stopwatch is not at 0:00:00, press LAP/RESET to clear stopwatch.
4.2 Start/stop timing
1. To start stopwatch, press START/STOP.
2. To stop stopwatch, press START/STOP again.
NOTE: For time in/time out timing, continue to press START/STOP each time you want to restart timing.
3. To clear stopwatch, press LAP/RESET.
4.3 Split timing
1. To start stopwatch, press START/STOP.
2. To pause stopwatch, press LAP/RESET. Record the split time shown on display.
NOTE: The paused time will hold on the display, but the stopwatch is still timing.
3. To view count up again, press LAP/RESET again.
4. Continue to press LAP/RESET each time you want to acquire more split times.
5. To stop stopwatch, press START/STOP.
6. To clear stopwatch, press LAP/RESET twice.
4.4 Fast finish (1-2) timing
1. To start stopwatch, press START/STOP .
2. To hold stop #1, press LAP/RESET.
NOTE: The paused time for stop #1 will hold on the display, but the stopwatch is still timing.
3. To hold stop #2, press START/STOP.
4. Record the time for stop #1 (currently on display).
5. To display stop #2, press LAP/RESET. Record the time for stop #2.
6. To clear stopwatch, press LAP/RESET a second time.
You can set alarm to sound for one minute at a specific time, and/or for a brief time once every hour.
If the alarm set for a specific time is switched on, you will see the alarm indicator in the upper right
corner of the display.
3.1 How to set alarm to sound at a specific time
1. Press MODE until the display scrolls to alarm set mode (upper display flashes “MO”).
2. Press LAP/RESET to select hours or minutes.
3. When you have selected the parameter you want to change, hold START/STOP to adjust the clock.
4. When you have selected the correct alarm time, push MODE to return to time display.
The alarm indicator should now be on.
3.2 How to switch off alarm set for a specific time
1. Scroll to time/calendar mode (upper display shows 1 nonflashing day).
2. Press LAP/RESET to see the alarm set time.
3. While holding LAP/RESET, press START/STOP .
4. The alarm indicator will switch off.
NOTE: If the alarm was already off, this same action will switch alarm on.
3.3 How to switch on and switch off hourly alarm
1. Scroll to time/calendar mode (upper display shows 1 nonflashing day).
2. Press LAP/RESET.
3. While holding LAP/RESET, press MODE.
4. If the hourly alarm was on, the entire upper display disappears briefly, and the hourly alarm is now off.
If the hourly alarm was off, the entire upper display flashes briefly, and the hourly alarm is now on.
NOTE: to stop alarm tone while it is chiming, press any button.
4. Stopwatch
functions
3. Alarm
Functions
3

5.1 Care of your calculator
To help ensure calculator longevity, do not touch the inside of the calculator. Avoid hard knocks
and overly strong key pressing. Extreme cold (Below 32°F or 0°C), heat (above 104°F or 40°C) and
humidity may also affect calculator functions. Never use volatile fluids such as lacquer thinner,
benzene, etc., when cleaning the unit. For servicing, contact your OAKTON distributor.
Before starting calculation, press the ON/C key to confirm that “0”is shown in the display.
5.2 Basic calculator functions
Secondary Function Key
Push this key first to access the secondary function of each key (the function listed above
each key).
Power on/clear
Push this key to turn the calculator on. The calculator is ready for operation.
When this key is pushed during operation, it clears the calculator except for the memory.
Power off key
When this key is depressed, the calculator is turned off.
Automatic Power off function
This function automatically shuts the calculator off approximately 8 minutes after the last key
operation. This conserves the batteries.
Numeral keys
Used to enter numbers on the display. You can display numbers in two ways:
with the floating decimal system (standard view) or with the scientific notation system.
Decimal point key
Enters a decimal point.
Ex: To obtain 12.3, press
ON/C
21
34
5 6
7 8
9 0
.
2ndF
OFF
OFF
2ndF
POWER
4
floating decimal system display scientific notation system display
(Use the key or
the key to enter
scientific notation system;
see page 6 for directions.)
12.3
F↔E
EXP
5. Calculator
functions

Plus key
Press for addition.
Ex: To calculate 3 + 2, perform: 3 2 5
Minus key
Press for subtraction.
Ex: To calculate 3 – 2, perform: 3 2 1
Also use this key to create negative numbers.
Ex. 12 28 –16
Division key
Press for division.
Ex: To calculate 6 ÷2, perform: 6 2 3
Multiplication key
Press for multiplication.
Ex: To calculate 6 x 2, perform: 6 2 12
Equals key
Completes arithmetic calculations and complex number calculations.
Ex: 3 2 1
Percent key
Use for percentage calculation and discount calculation.
Ex: To calculate 25% of 80, perform: 80 25 0.25 20
Clear entry key
Use to clear an incorrectly entered number.
Ex: If you want to calculate 123 + 456 and you incorrectly enter 123 + 455, press:
123 455 456 579
Open parenthesis and Close parenthesis keys
Use to open and close parenthesis in a more complicated arithmetic or complex number calculation.
Ex: To calculate 6 x (5+6) perform: 6 5 6 66
You can also use these keys to enter a negative value—no calculation required.
Ex. 4 3 –12
x
=
=
–
+
÷
CE
+CE =
5
%
+=
–=
÷=
x=
–=
2ndF x=
(
)x ( + ) =
2ndF %
x(=
–
–=
)

5.2 Basic Calculator Functions, continued
Entering scientific notation key
Press to enter a number in scientific notation.
Ex: To enter 1240, press 12 40. The display will show 12. 40
Display format exchange key
Press this key once to display the result of a calculation in the scientific notation system.
Ex: 10 3000 30000 ➔ 3. 04
Pushing the key once more displays the result of your calculation in the floating decimal
point system again.
See page 4 for diagrams of the display in floating decimal point system and in scientific
notation system.
Tabulation key
Pressing these keys lets you specify the number of decimal digits displayed in the result of a
calculation. You can specify from 0 to 9 decimal digits.
Ex: 11 0.12345 1.35795 3 ➔1.358
The tabulation function will remain active until you deactivate it— even if you turn the
calculator off. To deactivate this function, press the following keys:
Pi key
Press to enter the constant π(π= 3.141592654).
Random number key
Press these keys to generate uniform random numbers from 0.000 to 0.9999.
NOTE: Random number generation is not possible when binary/octal/hexadecimal base system
mode is set. See page 14 for information on setting different base system modes.
6
.
2ndF
RND
F↔E
x=F↔E
F↔E2ndF
TAB
x=
.
F↔E
EXP2ndF
π
EXP
EXP
2ndF TAB
2ndF TAB
5. Calculator
functions,
continued
2ndF π

5.3 Memory functions
Memory in key
Press to store a number in memory.
Ex: Press 50 . “50” is now stored in memory.
When a number is stored in memory, the letter “M” appears on the left side of the display.
Memory holds only one number at a time. Whenever you press the key,
the number that is on the display will replace the old number stored in memory.
Memory retains the number even if you turn off the calculator.
To clear the memory, depress the key followed by the key.
Recall memory key
Displays the contents of the memory. Pressing this key does not alter the memory contents.
Memory plus key
Press to add the number on the display (i.e. a calculated result) to the contents of the memory.
Ex: If the number 50 is stored in memory, and you want to add the number 25 to the memory,
press: 25
Then, press to recall memory. The memory will now contain the number 75.
Exchange key
Press this key to exchange the number on the display with the number stored in the working
register (the previously entered value). This lets you clear an incorrectly entered number that
has already been entered into the calculator.
Ex: If you want to calculate 26 + 40 and you incorrectly enter 25 + 40, press:
25 40 25 26 66
7
x➔M
x➔M
ON/C
M+
x➔M
RM
M+
RM
(2ndF
X➔Y
+2ndF X➔Y=
x➔M

5.4 Algebraic functions
Common logarithm key
Calculates the logarithm with a base of 10.
Ex: 3 ➔ 0.477121254
Antilogarithm key
Calculates the antilogarithm with a base of 10.
Ex: 3 ➔ 1000
Natural logarithm key
Calculates the logarithm base e (e = 2.718281828).
Ex: 3 ➔ 1.098612289
Natural antilogarithm key
Calculates the antilogarithm base e of the displayed number.
Ex: 3 ➔ 20.08553692
Square (x2) key
Calculates a square of the number displayed.
Ex: To calculate 32, press: 3 ➔ 9
Reciprocal (1/x) key
Calculates the reciprocal of the number displayed.
Ex: to calculate 1/8, press: 8 ➔ 0.125
8
log2ndF
10x
log
log
ln
ln2ndF
ex
ln
x2
x2
log2ndF
1/x
2ndF 10x
2ndF ex
2ndF 1/x
5. Calculator
functions,
continued

Square root key
Calculates the square root of the number displayed.
Ex: to obtain the square root of 4, press: 4 2
Cube root key
Calculates the cube root of the number displayed.
Ex. to obtain the cube root of 8, press: 8 2
Universal power (yx) key
Raises a number “y”to a power “x”.
Ex: to raise 5 to the 4th power (54), press: 5 4 625
Universal square root (x y) key
Calculates the xth root of Y.
Ex: to calculate the 6th root of 64, press: 64 6 2
Factorial key
The factorial key is useful in probability calculations. It calculates the factorial of the displayed
number (multiplies a series of consecutive integers).
Factorial of 4: (4 x 3 x 2 x 1) = 24
Ex: 4 ➔24
9
CE
n!
2ndF
2ndF
3
yx=
yx
2ndF
yx
=
2ndF 3
2ndF x y
2ndF n!
xy

10
5.5 Trigonometric/Geometric functions
Degree / Radian / Grad selector key
Used to calculate trigonometric and coordinate conversions.
The DRG key changes the angular mode.
Ex. To enter GRAD mode, depress the key twice.
“DEG” mode Entries and answers are in decimal degrees. One degree equals 1/360 of a circle.
“RAD” mode Entries and answers are in radians. One radian equals 1/2πof a circle.
“GRAD” mode Entries and answers are in grads. One grad equals 1/400 of a circle.
Right angle conversions: 90° = π/2 = 100g
Angular unit conversion key
These keys convert the displayed number into an equivalent number of the next angular mode.
• If you are in Degrees mode, pressing these keys will convert the display into equivalent radians.
• If you are in Radians mode, pressing these keys will convert the display into equivalent grads.
• If you are in Grads mode, pressing these keys will convert the display into equivalent degrees.
Ex: 180 (in DEG mode) 3.141592654 (in RAD mode)
Trigonometric function key
sin key calculates the sine of angle ø.
cos key calculates the cosine of angle ø.
tan key calculates the tangent of angle ø.
NOTE: make sure your calculator is in the appropriate angle mode (DEG, RAD, or GRAD) before
calculation. Select the angle mode with the key (see above).
Inverse trigonometric function key
sin key calculates the arcsine of angle ø.
cos key calculates the arccosine of the angle ø.
tan key calculates the arctangent of the angle ø.
NOTE: Make sure your calculator is in the appropriate angle mode (DEG, RAD, or GRAD) before
calculation. Select the angle mode with the key (see above).
sin
cos
tan
BC
A
sin ø = B/C
cos ø = A/C
tan ø = B/A
ø
sin
cos
tan
2ndF
2ndF
2ndF
sin–1
cos–1
tan–1
(opposite)
(hypotenuse)
(adjacent)
DRG
DRG
DRG
DRG
DEG RAD GRAD
DRG2ndF
DRG
▼
▼
2ndF DRG
5. Calculator
functions,
continued

11
Hyperbolic key
Press to use the trigonometric function keys (sin, cos, tan) as hyperbolic functions.
• sinh (z) = 1/2 (ez – e–z)
• cosh (z) = 1/2 (ez + e–z)
• tanh (z) = sinh (z)/cosh (z)
Press to view hyperbolic sine (sinh).
Press to view hyperbolic cosine (cosh).
Press to view hyperbolic tangent (tanh).
Arc hyperbolic key
Press to use the trigonometric function keys (sin, cos, tan) as inverse hyperbolic functions.
Press to view inverse hyperbolic sine (sinh–1).
Press to view inverse hyperbolic cosine (cosh–1).
Press to view inverse hyperbolic tangent (tanh–1).
Decimal degrees (decimal hours) key
Degrees/minutes/seconds (Hours/minutes/seconds) key
Press to convert a number to:
• decimal degrees or to
• decimal hours
Press to convert a number to:
• degrees/minutes/seconds or to
• hours/minutes/seconds
To enter Degrees/minutes/seconds:
D.MMSSsss where: D = Degrees (°)
M = Minutes (')
S = Seconds (")
s = Fractional seconds
Ex: Enter 8°9'20.123" as 8.0920123
Ex: To convert 8°9'20.123"
to decimal degrees, press:
8.0920123 8.155589722
To convert 8.053124 back to
degrees/minutes/ seconds, press:
8.155589722 8.0920123
hyp
2ndF
arc hyp
sin
hyp
➔DEG
To enter Hours/Minutes/Seconds:
H.MMSSsss where: H = hours
M = Minutes
S = Seconds
s = Fractional seconds
Ex: Enter the time 9 hours and 90 minutes as 9.90
Ex: To convert 9 hours and 90 minutes
to decimal hours, press:
9.90 10.5
To convert 10.5 hours to
hours/minutes/seconds, press:
10.5 10.300000
➔DEG
➔DEG
➔DEG
2ndF
D.MS
▼
2ndF
➔DEG
D.MS
▼
2ndF D.MS
▼
2ndF D.MS
▼
cos
tan
2ndF arc hyp
2ndF arc hyp
2ndF arc hyp
sin
cos
tan
hyp
hyp
hyp

5.6 Statistical functions
Statistical Mode key
Pressing these keys activates the statistical mode.
NOTE: The keys on pages 12 and 13 only work when the Statistical Mode is selected!
When the calculator is set to the statistical mode, the symbol “STAT” appears in the upper right
corner of the display. At the same time, all numerical values and calculation commands are cleared
(except for memory contents).
In the statistical calculation mode, these keys function as the following:
12
ON/C
2ndF
STAT
M+
DATA
)
x➔M
RM
M+
)
2ndF
∑x
“DATA”
“n”
“x”
“S”
“CD”
“∑x”
“∑x2”
“s”
Data key
Press to enter statistical data into memory. Each time you press the DATA key, another statistical
sample is entered into memory. The display then shows the total number of samples stored in
statistical memory.
Ex. Enter 12 1 ➔Enter 14 2 ➔Enter 18 3 ➔...and so on.
Clear data key
Press to remove the previously entered statistical data from memory. Each time you press the CD key,
another statistical sample is removed from memory in “last in, first out” order. The display shows the
total number of samples remaining in statistical memory.
Sample number key
Press to show the total number of samples stored in memory.
Data sum key
Press to obtain the sum of all the stored data.
2ndF
2ndF
2ndF
2ndF
)
n
DATA DATA DATA
M+
CD
2ndF
)
x➔M
RM
M+
5. Calculator
functions,
continued

13
Data mean value key
Press to obtain the mean (average) value of all the stored data.
Sum of squares of data key
Press to obtain the sum of the squares of all the stored data.
Sample standard deviation key
Press to obtain the standard deviation of the sample of data.
Use when data is taken from a sample of members of a population.
Population standard deviation key
Press to obtain the standard deviation of the population of data.
Use when data is taken from all members of a population.
x
x➔M
x➔M
2ndF
∑x2
s
RM
RM
2ndF
σ

14
5.7 Base system modes
Binary number mode key
Press to set the binary system mode—converts the number displayed into a number in base 2.
You cannot enter the digits 2, 3, 4, 5, 6, 7, 8, or 9 in this mode.
This mode lets you add, subtract, multiply, and divide.
Octal number mode key
Press to set the octal system mode—converts the number displayed into a number in base 8.
You cannot enter the digits 8 and 9 in this mode.
This mode lets you add, subtract, multiply, and divide.
Hexadecimal number mode key
Press to set the hexadecimal system mode—converts the number displayed into a number in base 16.
This mode lets you enter 16 digits: digits 0 to 9 and digits A, B, C, D, E, and F.
This mode lets you add, subtract, multiply, and divide.
The following keys act as A, B, C, D, E, and F in hexidecimal number:
Decimal number mode key
Press to set the decimal system mode. This is the normal (base 10) operating mode.
This mode lets you enter all digits from 0 to 9.
5. Calculator
functions,
continued
÷
2ndF
➔BIN
x
2ndF
➔OCT
–2ndF
➔HEX
log
yx
➔DEG
2ndF
ln
D
ABC
F
E
+
2ndF
➔DEC

15
7. Tech Board Plus Specifications
7.
Specifications
6. Battery
Replacement
5. Calculator
functions,
continued
STOPWATCH SPECIFICATIONS:
Timing modes:
single event, start/stop or split timing
Timing capacity: 24 hours
Resolution: 0.01 sec up to 30 min,
then 1 sec afterwards
Accuracy: ±8 seconds/day
Direction: up
Alarm: 1 min
5.8 Display Symbols
Error symbol (E): Appears when a overflow or an error is detected.
Memory symbol (M) Appears when a number is stored in the memory.
Minus symbol (–): Indicates that the number in the display is negative.
2nd function designation symbol (2ndF): Appears when the secondary function of a key is designated
Hyperbolic function designation symbol (HYP): Appears when hyperbolic function is designated.
Degree mode symbol (DEG): Appears when the degree mode is designated, or shows
that the angular mode of the converted result is in degrees.
Radian mode symbol (RAD): Appears when the radian mode is designated, or shows
that the angular mode of the converted result is in radians.
Grad mode symbol (GRAD): Appears when the grad mode is designated, or shows
that the angular mode of the converted result is in grads.
Parenthesis symbol “( )”: Appears when a calculation with parenthesis is performed
(when the "(” key is pressed).
Binary mode symbol (BIN): Appears when the binary system mode is set.
Octal mode symbol (OCT): Appears when the octal system mode is set.
Hexidecimal mode symbol (HEX): Appears when the hexadecimal system mode is set.
Decimal mode symbol (DEC): Appears when the standard, decimal system mode is set.
Statistical mode symbol (STAT): Appears when the statistical calculation mode is set.
6. Battery replacement
When the display appears dim, it is time to replace batteries.
To change batteries:
1. Carefully pry out the calculator or the stopwatch/clock from the Tech Board Plus clip.
2. Remove the battery cover on the back side of the calculator or the stopwatch/clock.
• The calculator uses two 357 batteries or equivalent.
• The stopwatch/clock uses one LR41 battery or equivalent.
3. Remove the old batteries and replace with fresh ones, noting correct polarity.
4. Carefully place the calculator or the stopwatch/clock back into the Tech Board Plus clip.
2ndF HYP DEG RAD GRAD ( ) BIN OCT HEX DEC STAT
E
M
GENERAL SPECIFICATIONS:
Display:
Stopwatch:101⁄2-digit LCD, 5⁄16"H
Calculator: 5-digit LCD, 1⁄4" H
Power:
Stopwatch: one LR41 battery or equivalent
Calculator: two 357 batteries or equivalent
Dimensions: 9"W x 133⁄4"H x 1"D (22.8 34.9 x 2.5 cm)
Shpg wt: 1 lb (0.45 kg)

8. Index
16
A
Alarm, hourly......................................3
Alarm, specific time ...........................3
Alarm set mode...................................2
Angular unit conversion key..........10
Antilogarithm key..............................8
Arc hyperbolic function key ..........11
B
Battery replacements........................15
Binary number mode.......................14
C
Care, calculator ...................................4
Clear entry key....................................5
Clock.....................................................2
Cosine key..........................................10
Cosine key, inverse...........................10
Cube root key......................................9
D
Date, setting.........................................2
Decimal degrees key ........................11
Decimal digits .....................................6
Decimal hours key............................11
Decimal number mode....................14
Decimal point key...............................4
Degrees/minutes/seconds key......11
Degrees/radians/grads key...........10
Display format exchange key...........6
Display symbols ...............................15
Division key.........................................5
E
Equals key............................................2
Exchange key.......................................7
F
Factorial key ........................................9
Fast finish timing................................3
G
Grads/degrees/radians key...........10
H
Hexidecimal number mode............14
Hours/minutes/seconds key.........11
Hyperbolic function .........................11
L
LAP/RESET button............................2
Logarithm key.....................................8
M
Memory in key....................................7
Memory, recall key.............................7
Memory, add key................................7
Minus key ............................................5
MODE button......................................2
Multiplication key ..............................5
N
Natural antilogarithm key................8
Natural logarithm key.......................8
Negative numbers`.............................5
Numeral keys......................................4
O
Octal number mode .........................14
P
Parenthesis keys..................................5
Percent key...........................................5
Pi key ....................................................6
Plus key................................................5
Power on key.......................................4
Power off key.......................................4
Power off, automatic..........................4
R
Radians/grads/degrees/key.........10
Random number key.........................6
Reciprocal key.....................................8
S
Scientific notation...............................6
Secondary function key.....................4
Sine key ..............................................10
Sine key, inverse................................10
Split timing ..........................................3
Square key............................................8
Square root key ...................................9
START/STOP button .........................2
Start/stop timing................................3
Statistical function keys..............12-13
Clear Data key...............................12
Data key .........................................12
Data mean value key ...................13
Data sum key.................................12
Population standard
deviation key.............................13
Sample number key.....................12
Sample standard deviation key .13
Stopwatch ............................................3
Stopwatch mode.................................2
T
Tabulation key.....................................6
Tangent key........................................10
Tangent key, inverse.........................10
Time/calendar mode .........................2
Time/calendar set mode ...................2
Timing, fast finish...............................3
Timing, split.........................................3
Timing, start/stop ..............................3
Trigonometric function
key...................................................10
Trigonometric function
key, inverse ....................................10
U
Universal power key..........................9
Universal square root key.................9
For more information, contact your OAKTON distributor.
9.1 Warranty
This OAKTON®TECH BOARD™PLUS is warrantied to be free from significant deviations in material and work-
manship for a period of six months from date of purchase. If repair or adjustment is necessary and has not been
the result of abuse or misuse within the six month period, please return—freight pre-paid—and correction will be
made without charge. We alone will determine if the product problem is due to deviations or customer misuse.
Out of warranty products will be repaired on a charge basis.
9.2 Return of Items
Authorization must be obtained from your OAKTON®distributor before returning items for any reason.
When applying for authorization, please include data regarding the reason the items are to be returned.
NOTE: We reserve the right to make improvements in design, construction, and appearance of products
without notice.
OAKTON—Reg TM #1,692,543.
8. Index
9. Warranty/
Return of
Items