Olympic Medical SMART SCALE 20 User manual

For information or assistance
Call Toll-Free 1-800-426-0353
U.S. or Canada
CAUTION: Read this instruction
manual completely before using or
servicing this product.
OLYMPIC
SMART SCALE®
MODEL 20/25
Instruction Manual
OLYMPIC MEDICAL
5900 1st Ave S · Seattle, WA 98108 · USA
www.olymed.com
SS-5632A-EN(M12)

This page is intentionally blank.

TOC-1
OLYMPIC SMART SCALE®Model 20/25
Table of Contents
OLYMPIC
SMART SCALE®
Model 20/25
Section 1: Installation
Intended Use ..........................................................................1-1
Description & Use ..................................................................1-1
Calibration Check ...................................................................1-1
Carrying the Model 20 Scale ..................................................1-1
Instructions for Cart Mounting ............................................... 1-2
Attaching & Removing the Tray .............................................1-2
Initial Battery Charge .............................................................. 1-3
Electrical Requirements..........................................................1-3
Battery Operation ...................................................................1-3
International Safety Symbols ................................................. 1-4
Section 2: Operation
Summary Instructions ............................................................2-1
Controls .................................................................................. 2-2
Status Lights ..........................................................................2-2
On/Off ......................................................................................2-3
Averaging Tone Volume Control Knob ..................................2-3
Setting Caster Brakes (Model 25) ...........................................2-4
Weighing the Baby .................................................................2-4
Baby Not Moving ...................................................................2-4
Baby Moving .......................................................................... 2-5
Weight Lock............................................................................ 2-5
To Weigh Next Baby ..............................................................2-5
Grams/Pounds-Ounces .........................................................2-5
Tare Function.......................................................................... 2-6
Overload .................................................................................2-6
Reweigh Feature .....................................................................2-6
Cleaning ..................................................................................2-7

TOC-2 OLYMPIC SMART SCALE®Model 20/25
Battery Operation ...................................................................2-7
Charging the Battery ..............................................................2-7
Battery Charge Life ................................................................2-7
Low Battery ............................................................................2-7
Battery Pack Replacement ....................................................2-7
Section 3: Service
Important Information ............................................................3-1
ESD & Contamination.............................................................3-1
Calibration ..............................................................................3-1
Calibration Procedure ............................................................ 3-2
Off-Center Load Test ............................................................. 3-3
How Olympic Smart Scale Averages the
Weight of an Active Baby .......................................................3-4
Troubleshooting .....................................................................3-4
Disassembly ...........................................................................3-5
Problems & Solutions.............................................................3-9
Replacing the Battery Pack ...................................................3-11
Replacing the Fuse .................................................................3-12
Replacing the Pico Fuse ........................................................3-12
Removing Internal Components ............................................ 3-12
Adjusting the Zero Offset ....................................................... 3-13
Replacing the Tray Mounts ....................................................3-14
Full One-Year Warranty ..........................................................3-16
Replacement of PCBs & Components ..................................3-16
Repair Parts ............................................................................3-16
Troubleshooting .....................................................................3-17

Page 1-1
OLYMPIC SMART SCALE®Model 20/25
Installation
Section 1:
Installation
CAUTION: Read and be familiar with this instructional
manual before using or servicing this product.
CAUTION: This product should only be assembled or
installed by a qualified technician.
WARNING: Electrical shock hazard when enclosure is
opened. Disconnect power cord from electrical outlet
before assembling, cleaning, or servicing.
Intended Use
For weighing babies up to 33 pounds (14.8 kg).
Description & Use
CAUTION: Never lean against or touch the weighing
tray or baby while weighing is in progress.
The Model 20 Olympic Smart Scale is an electronic baby scale.
Place the scale on a flat, level table or counter surface. Make sure
that the scale cannot slide or “walk” off the edge. Weight of scale
with tray is approximately 26 lbs (11.7 kg).
The Model 25 Olympic Smart Scale is an electronic baby scale
attached to a roll-around mobile base.
Calibration Check
Every Smart Scale is calibrated at the Olympic Medical factory
before shipment. However, the calibration of the scale should be
checked before it is put into service. (See Calibration instructions
on page 3-1.)
Carrying the Model 20 Scale
To pick up a scale, grasp case firmly at each end (Fig. 1A). Never
attempt to lift scale by tray.
Smart Scale Models 20 and
25 are operated and ser-
viced in the same manner,
with the exception of the
Model 25's attached roll-
around cart.
Fig. 1A

Page 1-2 OLYMPIC SMART SCALE®Model 20/25
Installation Instructions for Cart Mounting
CAUTION: When using the scale on a cart, ensure that
it is securely anchored.
Four threaded (10-32 UNF) holes are provided in base plate of scale
for bolting it to a cart or table (Fig. 1B). Rubber feet do not have to
be removed.
Attaching & Removing the Tray
CAUTION: Ensure that all four tray legs are secured
before placing infant in tray.
CAUTION: If using a Model 25 with roll-around cart,
always lock casters before placing baby in tray.
Any time a tray is changed, the scale must be calibrated and the
zero offset adjusted with the new tray in place (see Calibration on
page 3-1 and Adjusting the Zero Offset on page 3-13).
To remove the tray:
1. Loosen four Phillips screws holding tray legs (Fig. 1C).
Fig. 1C
Tray Leg
Phillips screw
Tray
Mount
Fig. 1B
Anchor Holes (4)
Bottom of Scale
There are several ver-
sions of the Smart Scale
tray. Trays can be used
interchangeably, but
the scale must be cali-
brated and the zero off-
set adjusted whenever
a new tray is added.

Page 1-3
OLYMPIC SMART SCALE®Model 20/25
Installation
2. Lift tray straight up (Fig. 1D).
To attach the tray:
1. Lower tray so four feet fit into tray mounts.
2. Securely tighten all four Phillips screws (Fig. 1C).
Initial Battery Charge
The Smart Scale has an internal rechargeable battery pack that
automatically charges when it is connected to a wall outlet. Before
the scale is battery operated for the first time, the batteries should
be charged for approximately 2.5 hours.
Electrical Requirements
CAUTION: This product must be connected directly to
a hospital-grade electrical outlet.
These products are rated at 120 Vac, 60 Hz, 2 amps. A 9-ft. (2.8 m)
long power cord is included.
Products may be ordered that are rated at 220/240 Vac, 50/60 Hz,
0.1 amps. They will be shipped without a plug. Install the proper
connector according to the following wire description:
Black: AC high
White: AC low (neutral)
Green: Chassis ground
Battery Operation
The scale can also be powered by its internal rechargeable battery
pack consisting of six sub-c NiCad batteries rated at 7.2 Vac
(1.2 Vac per cell).
For information on replacing the battery pack, see Replacing the
Battery Pack on page 3-11.
Fig. 1D
Tray
Tray
Feet (4)
Tray Mounts (4)
220/240 Vac products
are not UL or CSA certified.

Page 1-4 OLYMPIC SMART SCALE®Model 20/25
Installation
International Safety Symbols
The following international safety symbols are used on the scale:
Type B Equipment
Protective Earth (Ground)
See instructions
P

Page 2-1
OLYMPIC SMART SCALE®Model 20/25
Operation
Section 2:
Operation
CAUTION: Read and be familiar with this instructional
manual before using or servicing this product.
CAUTION: Inspect this product before each use to
ensure proper functioning.
CAUTION: Never use the scale or tray to transport
an infant.
DANGER: Explosion hazard. Do not use this product
in the presence of flammable anesthetics.
CAUTION: This product must be connected directly to
a hospital-grade electrical outlet.
Summary Instructions
To weigh a baby, follow these steps:
1. Ensure that the Smart Scale Model 20 is on a stable surface. If
using a Model 25 (cart-mounted) Smart Scale, set the caster
brakes.
2. To turn the scale display on, press On/Off (display). Wait for
the “Standby” light to dim and for the “0” to appear on the
weight display before weighing the baby.
3. Press Gm/lbs to select the appropriate unit of measure.
4. If the baby is not moving, the baby’s weight will appear imme-
diately, and the green “Read” light illuminates.
5. The yellow “Averaging” light illuminates if the baby is moving.
After the baby’s weight is computed, the “Averaging” light
dims, the weight is locked, and the green “Read” light illumi-
nates.
6. To “tare out” or cancel the weight of blankets or other objects,
place the blanket on the tray and press Zero.
7. Press Reweigh to weigh the baby again (after initial weighing is
completed and green “Read” light illuminates).
Use the “Averaging”
feature to obtain the
most accurate weight
of an active baby.

Page 2-2 OLYMPIC SMART SCALE®Model 20/25
Operation
567
4
Overload Signal
2
1
Low Battery
Signal
Battery Charging
Signal
Fig. 2A
3
Controls
Controls are shown in Fig. 2A.
1Gm/lbs: Press to convert grams to pounds-ounces and vice
versa. (Ounces to 0.1 ounce.)
2Reweigh: Press to weigh the baby again (after initial weighing
is completed and green “Read” light illuminates).
3 Zero: Press to clear display and get ready to weigh the next
baby.
4On/Off: Turn scale display on/off. (If operating on batteries,
scale turns itself off automatically three minutes after last
weighing.)
Status Lights
Status lights are shown in Fig. 2A.
5Standby (yellow): When flashing, scale is warming up and
automatically zeroing. Don't touch tray. Wait until “Standby”
light dims and “0” appears on display before placing baby on
tray.
6Averaging (yellow): When flashing, scale has detected baby
movement and has begun automatically computing baby's
weight. Don't touch tray or baby while averaging light illumi-
nates as an error in weight will result.
7Read (green): Okay to read. Final weight has been computed
and is locked on the display.

Page 2-3
OLYMPIC SMART SCALE®Model 20/25
Operation
On/Off
Press On/Off (see Fig. 2A) to turn the Smart Scale display on or off.
When the Smart Scale display is on, the “Standby” light blinks for
a few seconds while the scale warms up and automatically zeros.
Wait for the “Standby” light to dim and “0” to appear on the weight
display before placing the baby on the scale.
NOTE: The “Standby” light will not dim if tray is moving.
Make sure tray is not moving.
NOTE: Blankets or other items placed on the scale before
the “0” appears will not be weighed — they will be tared out
(see “Tare Function” on page 2-6).
Averaging Tone Volume Control Knob
Turning the Averaging Tone Volume Control Knob fully to the left will
silence the tone (Fig. 2B and 2C). Rotating the knob to the right will
increase the volume of the tone.
Fig. 2B
Weighing Tray
Base
Scale
Averaging Tone
Volume Control
Knob
Locking Casters
Increase
volume
Decrease or
silence volume
Fig. 2C

Page 2-4 OLYMPIC SMART SCALE®Model 20/25
Operation Setting Caster Brakes (Model 25)
The front two casters have foot brakes. Step on one side of the
brake lever to set the brake. Step on the other side to release
(Fig. 2D).
CAUTION: Always lock casters before placing baby in
the tray.
Weighing the Baby
CAUTION: Never lean against or touch the weighing
tray or baby while weighing is in progress.
CAUTION: Never leave an infant unattended in the tray.
CAUTION: If using Smart Scale Model 25, always lock
casters before placing baby in tray.
After “0” appears on the display, place baby in center of tray.
Baby Not Moving
If Smart Scale detects that the baby is not moving, his weight will
immediately appear and be locked on the display. The green
“Read” light will also illuminate.
Brake
Fig. 2D
Shown in
unlocked
position
Press down to
lock brake

Page 2-5
OLYMPIC SMART SCALE®Model 20/25
Operation
Baby Moving
If the baby is moving, the Smart Scale will automatically compute
the weight within a few seconds. During this time, the yellow
“Averaging” light will blink and the beeper will sound.
NOTE: You can adjust the sound using the On/Off Volume
Control knob, which is located below the control panel to
the right (see page 2-3).
After the baby's weight is computed, the “Averaging” light will stop
blinking, the green “Read” light will illuminate, and the final weight
will be locked on the display.
CAUTION: Touching the tray or baby while the
“Averaging” light is on can result in an incorrect weight.
If you do touch the baby, wait until the “Averaging” light
dims and the “Read” light illuminates. Then press
“Reweigh” to weigh the baby again. (See “Reweigh
Feature” on page 2-6).
Weight Lock
Weight will remain locked on display until Zero is pressed or the
scale display is turned off. (When operating on battery power,
display automatically turns itself off after three minutes.)
To Weigh Next Baby
Press Zero and wait for “0” to appear on display before placing the
next baby on the tray.
NOTE: The Smart Scale has an automatic zeroing feature.
Each time you press Zero, the scale automatically returns
to the same electronic zero reference point. This assures
reproducible weight change measurements.
Grams/Pounds-Ounces
Grams can be converted to pounds-ounces and vice versa by
pressing gm/lb. The scale displays ounces to the nearest tenth of
an ounce.

Page 2-6 OLYMPIC SMART SCALE®Model 20/25
Operation Tare Function
There are two ways to cancel (tare out) the weight of blankets or other
objects:
If the scale display is on (“0” shown on the display), place
blanket on tray and press Zero. The blanket weight will be
cancelled and the display will show weight of baby without the
blanket.
If the scale display is off, place the blanket on the tray and press
On/Off. The weight of the blanket will automatically be can-
celled and the display will show “0”. Next, place the baby on
tray and weigh.
NOTE: If the blanket is removed from the tray after its
weight has been cancelled (tared out), the scale will auto-
matically zero itself again. The “Standby” light may flash for
a few seconds and the “0” will reappear on the display. This
means that the scale no longer takes the blanket weight
into account and is ready to weigh another baby.
Overload
If the load exceeds 15 kg (33 lbs. 1 oz.), the overload signal on the
display panel will illuminate. Reduce the weight on the scale.
Reweigh Feature
After the baby has been weighed (green “Read” light illuminates),
you can press Reweigh to weigh the baby again, as many times as
desired.
Reweighing does not cancel the tare function. If the blanket weight
was cancelled (tared out) for the first weighing, it will remain
cancelled at reweigh.
NOTE: The reweigh feature is particularly useful when IV
tubes must be elevated while weighing the baby. The
weight can be confirmed by pressing Reweigh.
If an object is on the tray
and the display shows “0”,
the weight of the object
has been cancelled (tared
out). If an additional ob-
ject or a baby is then
placed on the tray, only
its weight will be shown.

Page 2-7
OLYMPIC SMART SCALE®Model 20/25
Operation
Cleaning
CAUTION: Do not allow liquid to enter the case as this
may damage the electronics and provide an electric
shock hazard.
CAUTION: To avoid damage to tray, do not wipe with
alcohol.
Regularly wipe the Smart Scale clean using a cloth dampened with
any ordinary hospital disinfectant.
Battery Operation
CAUTION: Rechargeable batteries that are repeat-
edly partially discharged and recharged may, over
time, develop a “memory” that will eventually lead to
premature battery failure. To avoid this, occasionally
run the scale on battery power alone until the cells are
fully discharged, and then charge them fully for
2.5 hours.
Charging the Battery
The Smart Scale has a rechargeable battery pack that automati-
cally charges whenever the scale is connected to a wall outlet.
When charging, “Charging” illuminates on display.
The scale can be used while connected to an electrical outlet with
the battery pack removed, or while the batteries are charging.
Battery Charge Life
With batteries fully charged, scale will operate for approximately
three hours of continuous use — enough for about 150 weighings.
When power cord is not in use, wrap it around the cleats on the rear
of the scale.
Low Battery
If “Low Battery” illuminates, approximately 30 minutes of continu-
ous operation remain. Connect scale to wall outlet as soon as
convenient.
If “Low Battery” blinks, the battery charge has been depleted. The
scale will automatically turn off and should be connected to a wall
outlet for recharging.
Battery Pack Replacement
See Replacing Battery Pack on page 3-11.

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Page 3-1
OLYMPIC SMART SCALE®Model 20/25
Service
Section 3:
Service
CAUTION: Service should only be performed by a quali-
fied technician.
CAUTION: This product should be calibrated, at mini-
mum, every 12 months.
WARNING: Electrical shock hazard when enclosure is
removed. Disconnect power cord from electrical outlet
before cleaning or servicing.
CAUTION: PC boards contain static-sensitive parts.
Always use appropriate ESD protection when enclosure
is removed.
Important Information
The Olympic Smart Scale is designed to allow field servicing down
to the printed circuit board (PCB) level. These instructions will assist
you in isolating the problem PCB or component. The faulty PCB
must then be returned to Olympic Medical for repair or replacement.
If the loadcell is found to be damaged, return the scale to Olympic
Medical for repair.
To identify the problem, see Troubleshooting on page 3-17.
ESD & Contamination
The integrated circuits and semiconductors on the PCBs can be
damaged by electrostatic discharge or contamination by body oil.
Observe proper handling cautions at all times.
Calibration
The scale can be accurately calibrated with any size tray in place,
and the various size trays can be used interchangeably. However,
any time a tray size is changed, the scale must be calibrated and the
zero offset adjusted (see Adjusting the Zero Offset on page 3-13)
with the new tray in place.
Rationale: As with any precision electronic instrument, the Smart
Scale can drift out of calibration over time. Since no electronic scale
recalibrates itself automatically, the only way to assure correct
calibration is to place an accurate, known weight on the scale tray.
Calibration Weight: The Smart Scale calibration procedure re-
quires a weight of 7500 ±1 g. This calibration weight may be
ordered from Olympic Medical (Catalog No. 56315).
There are several versions
of the Smart Scale tray.
Trays can be used inter-
changeably, but the scale
must be calibrated and
the zero offset adjusted
whenever a new tray is
added.
For information or
assistance
Call Toll-Free
1-800-426-0353
U.S. or Canada

Page 3-2 OLYMPIC SMART SCALE®Model 20/25
Service Calibrate Before First Use: The Smart Scale was calibrated at our
factory in Seattle before it was shipped. However, it should be calibrated
before being put into service because local variations in the force of
gravity can affect calibration by as much as 20 gm.
Calibration Frequency: Smart Scale calibration should be checked , at
minimum, every 12 months as well as each time after a tray is changed.
Calibration should not drift by more than 1–2 g. If the weight has drifted
by significantly more than two grams, see Troubleshooting on page 3-17.
Calibration Procedure
1. Ensure scale cart is on a firm, level surface and protected from moving
air. Ambient temperature should be 70º–75ºF (21.1º–23.8ºC).
2. Press and hold Zero and then press On/Off. The current software
revision (e.g., “CAL 1.0”) will first appear on the display (Fig. 3A), then
“C 0” will appear (Fig. 3B) while the scale captures the zero point.
Finally, “C 7500” will appear (Fig. 3C).
3. When “C 7500” appears, place the 7500-gram test weight on the
center of the tray. Calibration is successfully completed when “7500”
locks on the display and the “Grams” signal and green “Read” light
illuminate (Fig. 3D).
Fig. 3A
Fig. 3B
Fig. 3C

Page 3-3
OLYMPIC SMART SCALE®Model 20/25
Service
4. Perform the off-center load test.
Off-Center Load Test
Do the following to check the accuracy of the load cell after
calibration:
1. Place the 7500-gram test weight in the center of the tray and
press Reweigh. Record the displayed weight.
2. Place the test weight at one of the four test points shown in
Fig. 3D. Press Reweigh and record the displayed weight.
3. Repeat step 2 for the other test points shown in Fig. 3D.
4. If any of the displayed weights from the test points differ ±6 g
from the displayed weight from the center of the tray, the
loadcell may be damaged and require replacement. Contact the
OIympic Medical Service Department.
Fig. 3D
For information or
assistance
Call 800-426-0353
USA or Canada
Fig. 3D
Test point: center
of weight 5.5" off
center of tray
Test point: weight
against side of tray
Test point: center
of weight 5.5" off
center of tray
Test point: weight
against side of tray

Page 3-4 OLYMPIC SMART SCALE®Model 20/25
Service How Olympic Smart Scale Averages the
Weight of an Active Baby
The Olympic Smart Scale uses a sensitive loadcell together with a
proprietary software algorithm to detect the most accurate weight and
motion of an infant. When weight-force is applied to the tray, electronic
signals from the loadcell are processed by a series of electronic filters and
a microprocessor to detect motion and determine averaged weight.
Weight samples are taken 16 times a second. Sets of six samples are
averaged together to produce one reading. Each reading is compared to
previous readings. If a reading is within ±1 g, it is averaged with the
previous readings. If four consecutive readings are within ±1 g, the Smart
Scale will automatically lock the baby's weight, determined by the
average of these four readings, on the display.
If after taking 18 readings the Smart Scale is not able to find four
consecutive readings within ±1 g, it will recognize that the baby is
moving. The Smart Scale will then switch on additional filtering, clear all
averages, and repeat the process. If after an additional 18 readings it still
has not found four compatible readings, the Smart Scale will display and
lock on the last average.
To assure accuracy, design parameters for calculating averaged weight
were determined by weighing active babies on a special platform using a
strip chart recorder to measure the dynamic forces generated by the
baby’s weights and movements. The software program for weight-
averaging was then verified by further extensive testing in nurseries.
With its proprietary weight-averaging techniques, Olympic Smart Scale
can, typically, weigh a moving baby to an accuracy of one or two grams.
Troubleshooting
CAUTION: Service should only be performed by a qualified
technician.
WARNING: Electrical shock hazard when enclosure is re-
moved. Disconnect power cord from electrical outlet before
cleaning or servicing.
CAUTION: PC boards contain static-sensitive parts. Always
use appropriate ESD protection when enclosure is removed.
NOTE: After making any repairs to the Smart Scale, always
calibrate the scale. Ensure that you have the appropriate 7500-
gram weight before disassembling the scale. Other repairs
involve the use of specific additional weights. Review the repair
information before disassembling the scale.
For information or
assistance
Call Toll-Free
1-800-426-0353
U.S. or Canada