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Professional Baby Scale
INSTRUCTION MANUAL
BD-815U
Thank you for purchasing the TANITA digital baby scale.
For optimum performance and safety, please read this
manual carefully, and keep it handy for future reference.
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Safety Notes
Caution Symbols
Caution
Thank you for purchasing this precision crafted Tanita product. For optimum per-
formance and safety, please familiarize yourself with the Caution Symbols below.
These symbols are designed to alert the user to potential hazards when using this
equipment. Ignoring these Caution Symbols may result in serious injury, or damage
to the product.
• Please make sure you place the scale on a level and stable surface. If the equipment is
used when the scale is unstable because not all feet are on the surface, there may be a
risk of stumbling or inaccurate measurement.
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Never jump on the scale, there may be a risk of stumbling and malfunction of the equip-
ment.
• For the BD-815U; Ensure you use the original AC Adapter (MODEL: AD-0920M). Using
an AC Adapter other than the original one may cause malfunction.
Do not insert or remove the plug by the cable.
Please be sure to review before proceeding with the INSTRUCTION MANUAL.
This symbol indicates the possibility of serious
injury if the product is mishandled or instruc-
tions are ignored.
Warning
• Do not place a finger into the gap or hole of this equipment.
You may get injured.
This symbol indicates the possibility of physi-
cal injury or equipment damage if instructions
are ignored.
Caution
Maintenance
This symbol indicates general precautions that
should be taken when using this product.
This is a precision manufactured and accurately calibrated product. Please
observe the following instructions.
• Never disassemble or adjust the equipment, as this may cause malfunctions. The equip-
ment should only be inspected in accordance with the regulations in each country.
• When not in use for a long time, unplug the AC Adapter from the wall socket.
• Do not wipe the equipment with corrosive chemicals (benzine, cleaner, etc.). Please use
a neutral detergent to clean the equipment.
• Avoid subjecting the equipment to excessive shocks or vibrations.
• When disposing of this unit, please do so in accordance with the prevailing regulations
in each country.
Warning
•Inserting and Removing the AC adapter
To reduce the risk of electric shock or product damage, never insert or
remove the AC adapter with wet hands.
•Do not under any circumstances dismantle or alter the device, as this
could result in electric shock or injury as well as adversely affect the preci-
sion of measurements.
•To prevent fire hazard
Use only a correctly wired (120V AC) outlet, and do not use a multiple
outlet extension cable.
• If an unauthorised person attempts to disassemble or repair any of the part, the warran-
ty will become invalid. When the unit malfunctions, please consult your nearest Tanita
sales office or agent.
• Do not wash any part of the scale other than the basket with water.
•Do not sit on the edge of the scale, jump on it, or bounce on the baby bas-
ket, as any resultant fall or slip may cause serious injury.
•The baby basket is not designed to accommodate individuals weighing
more than 33lb(15kg).
•As a safety precaution, infants must not be left unattended on the baby
basket.
Do not lean the product against the wall where people and objects pass by.
Someone may touch the product and it may fall down
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Safety Notes (continued)
Explanation of terminology
Instructions for Measurement
•Capacity
Please observe the following instructions for accurate measurement.
• Measurement may not be possible on a surface that is strongly vibrating. In such cases
transfer the equipment to a stable surface with little or no vibration.
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This shows the maximum weight that can be measured by the scale.
[Example]
In the case of Maximum capacity 33lb (15kg), it can measure up to 33lb (15kg).
* One exceeding the weighing capacity cannot be measured.
• In the case to move to a place with a temperature difference of 36˚F (20˚C) or more, leave
it before use for 2 hours or more after moving.
• While taking measurements, please keep any persons using transmitters, such as a
cellular phone, away from the unit to avoid causing margin errors.
•d
This shows the amount of one scale mark. In the case of a digital display, this shows the inter-
val of the numeric value to change.
[Example]
<Usage Conditions>
In the case of Minimum Graduation 0.1oz (0 - 12lb) 0.2oz (12 - 33lb) or 2g (0 - 6kg) 5g (6 - 15kg)
the display increases and decreases.
Temperature Range for Use : 41˚F - 95˚F (5˚C - 35˚C)
Relative Humidity
•Extend Minimum Graduation
Enables changing precision of measurements.
: 30% - 80% (without condensation)
•Tare
<Storage Conditions>
The container, towel, blanket, etc., used when measuring weight is called “tare”.
To measure the net-weight after subtracting the weight of the tare is called "tare weighing."
Temperature Range of Environment : 14˚F - 122˚F (-10˚C - +50˚C)
Range of Relative Humidity : 10% - 90% (without condensation)
To avoid malfunctions, avoid storing the equipment where there is direct sunlight,
significant temperature changes, the risk of dampness, a large amount of dust, in
the vicinity of fires, or where there is the risk of receiving vibrations or shocks.
<AC Adapter>
AD-0920M
Model
Input
120 VAC
9 VDC
60Hz
200mA
Output
To measure correctly
Do not measure at a place where the temperature fluctuates
greatly.
Errors may be observed in the measured value. In the case to move to a
place with a temperature difference of 36˚F (20˚C) or more, leave it
before use for 2 hours or more after moving.
• Do not use cellular phones or microwave therapy equipment near this equipment.
It may not measure correctly due to equipment malfunction.
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Baby Basket Attachment & Removal
A.Attachment
The baby basket is not attached to the main unit when unpacked.
B.Removal
The baby basket can be removed and washed.
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1
1
Pull out the lever.
Pull out the lever.
Line
Align the far edge of the basket
While gently pushing down the
with the stickered line.
lever, slide out the basket in the
displayed direction.
2
3
4
2
3
Slide the basket over the plat-
form until it stops.
It is ready to remove the basket
once its far edge is aligned with
the stickered line.
Make sure the basket is firmly
secured and then fix it to the
platform by pushing in the lever.
Once the basket is removed, take care not to
insert a finger or drop anything into the gap.
Caution
Make sure the basket can't drop.
Caution
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Part Names & Accessories
Names and Functions of Display Panel and Operation Keys
* The pointers (black triangles) indicate active items.
Display Panel
Baby basket (for infant)
Front
* The backlight is on only when the AC adapter is used.
* The mark appears in the digital display next to each of the
following operations, indicating which are in effect.
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Lever
Measurement is
stabilized.
Tare is specified.
Display is on
hold.
Display panel
Weight gain is displayed
for 5 seconds after pressing
the Weight Gain key.
Memorized value is
recalled and displayed.
Weight is memorized.
Operation keys
Refer to page 11
Level gauge
Adjusters (4)
Back
* Available key make a “beep” sound when pressed.
Operation Keys
Battery cover
RECALL
WEIGHT GAIN
* Indicate the weight dif-
ference between memo-
ry weight and current
weight.
MEMORY
* Memory
current weight.
* Sets display
hold time.
Indicates the memory weight
when it has memory weight.
of
WEIGHT LOCK OFF
* Set auto power off time.
Sets the weight lock off.
g/lb•oz
Selects grams or
AC adapter inlet
pounds and ounces
for weighing unit.
RS-232C connector
Battery housing
Confirmation of accessories
ON/TARE
ZERO
OFF
EXTEND
Instruction manual (this book)
AC adapter (9V)
Turns the power on
or sets the tare.
Scale resets to
zero.
Turns power
off.
Provides greater
precision.
AA-size batteries(4)
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Power Supply
How to Set Up Correctly
Use the scale in a firm, flat and stable location.
• Do not position it anywhere that is subject to direct
sunlight, near heating equipment, or directly in the
path of an air conditioner outlet.
Using batteries
(1) Turn the scale upside-down,
and turn the finger screw on
the battery cover counter-
clockwise (as indicated) to
release the screw.
(2) Lift off the battery cover.
(3) Insert new batteries.
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• Do not use it anywhere that is subject to significant
temperature change.
• Do not position it anywhere that is either damp or
subject to high humidity.
• After positioning the scale, pick up the baby basket
from both sides to confirm that the basket is not easily
removed before use.
• Ensure that the lever is pushed in.
* Insert the batteries
such that the negative
terminals of the batter-
ies are pushed up
against the coils within
the battery housing.
Level gauge Check
•Place the scale on a flat surface to ensure
accurate measurement.
•Turn the four adjusters such that the air bub-
ble in the level guide is positioned exactly in
the center. Confirm that all four adjusters
are in contact with the surface.
•When the batteries start to run low,
on the display panel as a warning.
All (four) batteries should be immediately
replaced with new ones at the same time.
Note) Do not use a combination of alkaline and
manganese batteries, as such an arrangement
may result in equipment failure.
appears
Image
Level gauge
Note) Rechargeable batteries are NOT recom-
mended.
<View from above>
•A set of standard batteries should last about
one year (assuming four readings a day).
Red
Air bubble
Adjusters (4)
Using the AC adapter
(1) Insert the AC adapter jack into the AC
adapter inlet on the right side of the main
unit.
(2) Plug the AC adapter into the power outlet.
Caution
This equipment must be used
with the included AC adapter.
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How to Use the Scale
取り扱い上のご注意
General measurement
After measurement, remove the
2baby from the baby basket.
Press the
key to turn on
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1
If the display hold time has been set, the
measurement remains on display for the
set time. The display can be reset to
the power.
After flashing the display.
< Example of the lb • oz display >
at any time by pressing the
key.
is displayed.
Press the
key to select the unit.
2
The display alternates between the two units by pressing the key.
* Unit selection can be made valid only when “0” is displayed.
Extended Display Function
t
s
When the
key is pressed while the
lb • oz unit
g unit
display is on hold, the weight is displayed
0.05oz (1g) units for as long as the key
remains pressed.
Note
•Press the
key to cancel measurements or turn off the display.
* The extended display function cannot be used if
“Hold Time” is canceled, or if the “Recall” or
“Weight Gain” is displayed.
Keep pressing
•The extended display function cannot be used if “Hold Time” is canceled, or if
the “Recall” or “Weight Gain” is displayed.
When tare is not specified
By releasing the
key simultaneously
Place the baby on the baby basket.
Once the scale stabilizes and the weight is con-
1
return to the previous display.
Release
firmed, stabilized ( ) and weight lock ( ) will
appear. (Beep sound)
"
t
Measurement instructions
•A warning sound beeps if a baby is placed
on the basket before
is dis-
played.
If it happens, remove the baby from the bas-
ket.
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How to Use the Scale (continued)
Tare weighing function
After turning on the power, the bath towel, diaper, blanket etc. is
End of measurement.
4Remove the baby from the baby basket.
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When Hold Time is set, the measurement
is retained for the set time, after which the
deducted by pressing
key. Then, the baby’s actual (i.e. net)
weight (excluding the weight of the towel, diaper, etc.) can be meas-
ured.
display resets to
.
Place the bath towel or blanket
1on the scale.
The weight of the bath towel is displayed.
Canceling the tare function
Remove the tare item(s) from
Press the
key.
2
1the basket.
(Beep sound)
is displayed, and the pointer
beside NET is shown. (Beep sound)
Press the
key with noth-
2
Place the baby on the baby bas-
ing on the basket.
(Beep sound)
3ket.
The net weight of the baby (excluding the
The tare function is canceled and
weight of the bath towel, etc.) is dis-
played. (Beep sound)
is displayed.
Caution
•Tare weighing is possible only within the maximum tare weight 4lb (2kg).
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Memory Function for Measured Values
Memory Function
Memory Value “Recall” Method
This function is used to check the value memorized previously.
When the
key is pressed while the display is on hold, the dis-
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played value is memorized.
Press the
key.
1(Beep sound)
Press the
1(Beep sound)
key.
The value memorized previously is shown
for 5 seconds.
5 seconds
* This key is valid only when this scale has a mem-
orized weight.
< Display is on hold >
* When the previous reading is memorized, the
“Memory” pointer is shown.
Pressing the
key overwrites the
existing record with the currently dis-
played value as the new memorized value
while the display is on hold.
Display Weight Gain
“Memorize” the weight before breastfeeding, and then take another
measurement after breastfeeding. The increase is calculated automati-
cally, by pressing weight gain.
Memory cancellation
Place the baby on the baby basket.
(Beep sound)
Press the
key while
is displayed.
1
1
The memorized value is deleted, and the
“Memory” pointer disappears.
(Beep sound)
Press the
key.
2“The currently displayed value – memorized
value” is displayed as the weight gain
(breastfeeding amount) for 5 seconds.
* If the new reading (after breastfeeding) is less than the memorized value (before breast-
feeding), a minus sign (–) is displayed.
Caution
•When checking the weight gain for another baby, be sure to memorize his/her
weight before measuring the weight gain. Each baby’s weight must be record-
ed before and after breastfeeding for accurate measurement of the breastfeed-
ing amount.
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Various Setting Methods
Three types of setting, namely “Display Hold Time” and “Auto Power
Off Time” can be used on this scale.
Auto Power Off Time
The “Auto Power Off Time” setting automatically turns off the power
when the scale is unused for the specified length of time.
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(Beep sound)
Press
key.
1
2
(Beep sound)
Press
key.
3The auto power off time is shown (the default is 15 minutes), and changed by,
pressing this key.
Press
key while the screen is
* The auto power off times can be set are 15 minutes, 30 minutes, 45 minutes, 60 minutes, or
-- (None).
(Beep sound)
flashing.
--(None) means that the auto power off function is deactivated.
s
s
Display Hold Time
You can set certain seconds to keep the measurement on the display after remov-
ing the baby.
(Beep sound)
Press
key.
t
t
3The hold time is shown (the default is 10 seconds), and the display changed by
pressing this key.
To complete to set the auto power
* The hold times that can be set are 10 seconds, 20 seconds, 30 seconds, or -- (None).
-- (None) means the hold function is deactivated.
4off time, press
again.
(Beep sound)
s
s
s
To save and complete that setting.
To complete to set the hold time,
4press
again.
(Beep sound)
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Output Data Format
Grams (g) mode (transmission data)
Explanation for RS-232C-compliant output
Transmission data is output immediately after measurement regard-
less of the status of the reception side (e.g. PC). Therefore, the recep-
tion side must always be ready to receive data before any measure-
ments are taken.
This explanation is for the interface to output the readings from the
Digital Baby-Scale BD-815U to external equipment (e.g. PC) as a RS-
232C-compliant signal.
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Specifications
A. When the display is held
Header Output data (ASCII code)
Communication standard
Communication method
Signal speed
EIA RS-232C
Asynchronous
9,600bps
8bit
Item
Details
Control data
Control data
Model No.
Body weight
{0
Fixed at 16
Fixed at 1
"XXXXXX"
XXXXX
~0
Data bit length
Parity
MO
Wg
8-byte fixed length (“BD-815”)
NONE
3~5 bytes variable length (unit: g)
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Stop bit
1bit
{
˜
0
,
1 6
,
0
,
1
, M O , " B D - 8 1 5
"
, W g
,
3
Terminator
CR+LF
28 29 30 31 32
Flow control
None
9 7 2 CR LF
Signal line name and connection method
B. When the Weight Gain key is pressed
Terminal no.
Signal name
Item
Header Output data (ASCII code)
Details
1
2
3
4
5
6
7
8
9
Weight gain
Gg
Rg
XXXXXX
1~6 bytes variable length (unit: g)
3~5 bytes variable length (unit: g)
Memorized weight
XXXXX
TXD
1
2
3
4
5
6
7
8
,
9
10 11 12 13 14 15 16
G g 5
,
1 2 0
R g
,
2 8 6 CR LF
GND
C. When the Recall key is pressed
Header Output data (ASCII code)
Item
Memorized weight
Details
Rg
XXXXX
3~5 bytes variable length (unit: g)
1
2
3
4
5
6
7
8
9
R g
,
3 8 6 8 CR LF
Connection example
Note
BD-815U
PC, etc.
•Commas (,) are used to separate data.
•Terminator (end of data) is CR (ASCII code: 0DH), LF (ASCII code: 0AH).
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Output Data Format (continued)
Pounds/ounces (lb•oz) mode (transmission data)
Transmission data is output immediately after measurement regard-
less of the status at the reception side (e.g. PC). Therefore, the recep-
tion side must always be ready to receive data before any measure-
ments are taken.
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A. When the display is held
Item
Header Output data (ASCII code)
Details
Control data
Control data
Model No.
Body weight
{0
Fixed at 16
Fixed at 1
"XXXXXX"
XX.XX.X
~0
MO
Wo
8-byte fixed length (“BD-815”)
5~7 bytes variable length (unit: lb•oz)
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
{
˜
0
,
1 6
,
0
,
1
, M O , " B D - 8 1 5
"
, W o
,
9
28 29 30 31 32 33
.
3
.
3 CR LF
B. When the Weight Gain key is pressed
Item
Header Output data (ASCII code)
Details
Weight gain
Memorized weight
Go
Ro
XXX.XX.X
XX.XX.X
5~8 bytes variable length (unit: lb•oz)
5~7 bytes variable length (unit: lb•oz)
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
G o
,
0
.
3
.
5
,
R o
,
8
.
1 5
.
7 CR LF
C. When the Recall key is pressed
Item
Memorized weight
Header Output data (ASCII code)
Details
Ro
XX.XX.X
5~7 bytes variable length (unit: lb•oz)
1
2
3
4
5
6
7
8
9
10 11
R o
,
8
.
1 5
.
7 CR LF
Note
•Commas (,) are used to separate data.
•Terminator (end of data) is CR (ASCII code: 0DH), LF (ASCII code: 0AH).
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Troubleshooting
If you are concerned that the scale may not be functioning correctly,
please check the following points before requesting repairs.
Specifications
Model
BD-815U
Capacity
33 lb (15000g)
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Problem
Check points
Page
0.1oz(0-12lb)
2g (0-6000g)
0.2oz(12-33lb)
5g (6000-15000g)
d (division)
• Have the batteries been removed, or has the AC
adapter been unplugged?
Nothing is displayed
Maximum tare
4lb (2000g)
• Are the batteries running low?
• Is anything stuck to the terminals of the batter-
ies?
when the
pressed.
key is
P.12
s
s
Extended calibration (uncertified) 0.05oz (1g)
Backlit LCD
Display panel
(Backlight is on only when the AC adapter is used)
• The batteries are running out. Please replace
them immediately or use the AC adapter.
is displayed.
P.12
P.14
RS-232C (D-sub 9-pin female connector),
unidirectional output
External interface
Power supply
After the power is
turned on,
Input: AC 120 V (60 Hz) Output: DC 9 V / 200mA
• Is any pressure being applied to the baby basket
when the power is turned on?
• Has basket been removed?
DC 6 V (using the batteries)
DC 9 V (using the AC adapter)
is displayed, and an s
Regular voltage
alarm sounds.
0.12 W or less (using the batteries)
0.35 W or less (using the AC adapter)
Power consumption
Consumption current
is shown
during measure-
• The maximum measurable weight capacity for
the scale (33lb / 15 kg) is exceeded.
P.7
s
20mA (using the batteries)
38mA (using the AC adapter)
ment.
Operating temperature
Storage temperature
Overall dimensions
Main unit mass
Main material
41˚F - 95˚F (5˚C - 35˚C)
14˚F - 122˚F (-10˚C - 50˚C)
D16.1 W23.6 H6.2in (D409 W600 H157mm)
Approx. 10.1lb(4.6kg)
ABS resin
Made in
Japan
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© 2007 TANITA Corporation. All Rights Reserved.
BD8157001
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