natus OLYMPIC SMART SCALE 50 User manual

602016C
Instruction Manual
OLYMPIC SMART SCALE®
Model 50/51
CAUTION
Read and be familiar with this manual before installing,
operating, or servicing this device. To ensure operator,
technician, and patient safety, use only as specified in
this manual.

Product Manufacturer:
Natus Medical Incorporated
5900 First Avenue South
Seattle, WA 98108 USA
Global sales & support: 1-800-303-0306
Phone: [phone]
Fax: [phone]
Web: www.natus.com
The information in this manual is subject to change without notice.
No part of this manual may be photocopied, reproduced, translated, or reduced to any electronic medium
without the express written permission of Natus Medical Incorporated.
All tradenames and trademarks mentioned herein are property of their respective owners.
Copyright © 2012 Natus Medical Incorporated. All rights reserved.

OLYMPIC SMART SCALE Model 50/51 Instruction Manual i
Contents
Section 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Controls and Status Lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Status Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Averaging the Weight of an Active Patient. . . . . . . . . . . . . . . . . . . . . 1-5
Section 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Installing the Smart Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Locking Units to Kilograms (optional) . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Attaching the Smart Scale to Its Cart (Mobile Base) . . . . . . . . . . . . . 2-2
Before First Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Initial Battery Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Calibration Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Testing the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Section 3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Operating the Smart Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Setting the Caster Brakes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Adjusting the Platform Ends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Weighing the Patient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Kilograms/Pounds-Ounces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Zeroing the Weight of Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Patient Still, Not Moving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Patient Active, Moving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Weight Lock/Unlock (AVERAGE/UNLOCK) . . . . . . . . . . . . . . 3-4
Recalling the Last Locked Weight . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Weighing the Next Patient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Section 4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Cleaning the Smart Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Charging the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Battery Charge Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Low Battery (LO BAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Calibrating the Smart Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

ii OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Section 5 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Section 6 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Disassembling the Smart Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Reassembling the Smart Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Replacing the Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Main Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Internal Fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Replacing the Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Testing the Membrane Switch Panel . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Testing the Ribbon Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Testing the Main Printed Circuit Board . . . . . . . . . . . . . . . . . . . . . . . .6-9
Testing the Power Supply Printed Circuit Board . . . . . . . . . . . . . . . .6-10
Replacing the Power Supply Printed Circuit Board . . . . . . . . . . . . . .6-11
Testing the Display Printed Circuit Board . . . . . . . . . . . . . . . . . . . . .6-11
Replacing the Display Printed Circuit Board . . . . . . . . . . . . . . . . . . . 6-12
Entering Counts Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Returning for Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-13
Section 7 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Parts and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Section 8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Electromagnetic Specifications – Manufacturer’s Declaration. . . . . . . . . .8-3
Recommended Separation Distances Between Portable and Mobile RF
Communications Equipment and the Olympic Smart Scale. . . . . . . . .8-5
Appendix A Drawings and Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 1-1
Section
1
Overview
This manual provides the necessary information to install, maintain, and service
the Olympic Smart Scale®Model 50/51. The operating instructions in this manual
are intended for use under the direct supervision of a licensed medical practitioner.
The installation and service instructions in this manual are intended for use by
qualified service technicians.
Conventions
The following conventions are used in this manual.
Table 1.1 Conventions
Convention Description
NOTE
#
Notes provide additional information to clarify a point in the text.
CAUTION
Cautions indicate situations that, if not avoided, could result in minor
to moderate injury to the patient or operator, or damage to the equipment.
WARNING
Warnings indicate situations that, if not avoided, could result in
serious injury or death to the patient or operator.
BUTTON
This character style represents buttons and controls that the user
can touch or press.

1-2 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Symbols
Symbols
The following symbols are located on the Olympic Smart Scale and its packaging.
Table 1.2 Symbols
Symbol Definition Symbol Definition
Alternating current (ac)
voltage
Nonionizing
electromagnetic radiation
Atmospheric pressure Protective earth (ground)
Caution, read instructions Rechargeable battery
Electrical shock hazard Shipping
Fuse Storage
Humidity, condensing Temperature
Line (hot conductor) Type B equipment
Neutral (neutral conductor) Legal manufacturer

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 1-3
Intended Use
Intended Use
The Olympic Smart Scale®Model 50/51 is intended for weighing infants and
children up to 55 lb (25 kg).
Description
The Olympic Smart Scale Model 50/51 is a scale that quickly and safely weighs
pediatric patients, from infants to toddlers. It features folding ends to easily
accommodate the patient (see Figure 1.2). The scale operates on rechargeable
batteries or power from a hospital-grade electrical outlet.
The Model 50 is a table-top model, while the Model 51 roll-around model comes
attached to a cart (mobile base), which makes it the perfect height for use with all
models of Olympic Warm-Lamps.
Figure 1.1 Smart Scale Model 50/51
Figure 1.2 Folding ends accommodate the patient
Model 51Model 50
Folding ends
Handles
Lock/unlock buttons
Display panel
Storage compartment
Caster wheels
Both sides downOne side down

1-4 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Description
Controls and Status Lights
Figure 1.3 Controls and status lights
Control Buttons
ON/OFF (Display). Turn the scale display on or off.
ZERO. Cancels (tares out) the weight of any objects (e.g., blankets, toys) on the
weighing platform; use before placing the patient on the platform.
KG/LB. Changes the display between measurement units of pounds-ounces and
kilograms.
AVERAGE/UNLOCK. Calculates a four-second average of an active patient’s weight
and locks it on the display. Press again to unlock the display.
RECALL. Displays the last locked weight after the display has turned off.
Status Lights
LOCKED (green). The patient’s average weight is locked on the display. The
weight shown will remain on the display when the patient is removed from scale.
AVERAGING (yellow). The scale is computing a four-second average of the
patient’s weight. Avoid touching the patient and platform while the AVERAGING
light is flashing.
OVERLOAD. The weight on the platform exceeds 55 lb (25 kg).
LO BAT. Indicates low or depleted battery charge. Lit and steady means that
approximately 30 minutes of battery life remain. Blinking means that the battery
charge is depleted, and the scale will automatically shut off. If this indicator is lit or
blinking, plug the scale into an electrical outlet to recharge the battery (see
page 4-2).
1 2 3 4 5
6
7
8
9
10
1
NOTE
#
If operating on batteries, the scale automatically turns off after three minutes of inactivity.
2
3
4
5
NOTE
#
RECALL only operates when the scale display is off. The scale display automatically turns
off after 10 seconds of inactivity.
6
7
CAUTION
Touching the platform or patient while the AVERAGING light is blinking can result in an
incorrect weight (see Weight Lock/Unlock (AVERAGE/UNLOCK) on page 3-4).
8
9

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 1-5
Description
CHARGING. The batteries are charging. The scale can be used while the batteries
are charging.
Averaging the Weight of an Active Patient
The Olympic Smart Scale detects movement and accurately calculates the weight
of an active, moving child. When weight-force is applied to the tray, electronic
signals from the load cells are processed by a series of electronic filters and a
microprocessor that detect motion and calculate an averaged weight.
Weight is sampled at 16 Hz (16 samples per second). Every six samples are
averaged to produce one reading. In normal operating mode, this reading is shown
on the display.
When AVERAGE/UNLOCK is pressed, an electronic smoothing filter is activated
and each reading (six sample average) is compared to the previous reading. If
the reading is within ±200 g, it is averaged with the previous reading. If eight
consecutive readings are within ±200 g, the weight locks on the display. If, after
sixteen readings, eight readings are not within ±200 g, the scale locks the last
average on the display. This process occurs in just four to six seconds.
To assure accuracy, Natus Medical determined the design parameters for
calculating averaged weight by weighing active infants on a special platform using
a strip chart recorder to measure the dynamic forces generated by the infant’s
weights and movements. The software program for weight-averaging was then
verified by further extensive testing in nurseries.
With its sophisticated weight-averaging techniques, the Model 50/51 can weigh a
moving infant to an accuracy of 20–40 grams.
10

1-6 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Description

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 2-1
Section
2
Installation
Installing the Smart Scale
The Smart Scale requires minimal handling during unpacking and installation.
To install the Smart Scale Model 50:
Before using the scale, remove and discard the green protective display cover.
Place the scale on a sturdy, flat, level table or countertop.
Attach the scale to a mobile cart or table: Four threaded (10-32 UNF) holes
are provided in the base plate of the scale for bolting it to a cart or table (see
Figure 2.2). The scale’s rubber feet may remain attached.
Locking Units to Kilograms (optional)
The standard configuration of the scale allows you to toggle the units of
measurement between metric and English (kilograms and pounds). You can
permanently lock the units to measure kilograms only.
WARNING
Electrical shock hazard when the enclosure is open. Unplug the power cord from the
electrical outlet when installing this device.
CAUTION
Only qualified technicians should assemble this device.
Read and be familiar with this instruction manual before assembling this device.
NOTE
#
The scale is heavy and awkward; two people should lift the scale. To pick it up, firmly grasp
the bottom of the scale; never attempt to lift the scale by its sides.
CAUTION
Ensure that the scale is away from the edge so that it cannot slide or “walk” off the table
or countertop.
CAUTION
If using the scale on a cart, securely anchor the scale to the cart. Confirm that the cart/scale
combination is stable at 10° of tilt with 25 kg weight on a platform end in its down position.

2-2 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Installing the Smart Scale
To permanently lock the units to kilograms:
1Press ON/OFF on the front panel to turn on the scale.
2Press KG/LB until kilograms are selected.
3Press ON/OFF to turn off the scale.
4Lift and turn over the scale to gain access to the KG/LB disabling switch. With
the scale oriented as shown in Figure 2.1, you can access the switch through the
3/8” hole on the right side of the bottom of the scale.
Figure 2.1 Bottom of Smart Scale — KG/LB disabling switch
5Flip the KG/LB disabling switch to the left.
6Press ON/OFF to turn on the scale.
The units are now locked to kilograms.
7Press KG/LB to verify that the units are locked to kilograms.
If locked, the display should still show kilograms.
8Place the Locked to KILOGRAMS label over the KG/LB switch.
Attaching the Smart Scale to Its Cart (Mobile Base)
Required Items:
Smart Scale
Cart (mobile base)
Probe
Mounting hardware
Access to KG/LB disabling
switch
NOTE
#
Natus Medical manufactures a cart (mobile base) for the Smart Scale Model 50.
The Model 51 is the Smart Scale Model 50 with this cart.
CAUTION
Before using the scale on a cart, securely attach the Smart Scale to the cart as described
in the following instructions.
NOTE
#
The mounting hardware (four #10-32 screws, washers, and nylon spacers) and caution
label is taped to the inside of the cart.

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 2-3
Installing the Smart Scale
To attach the scale on the cart:
1Place the scale on top of the cart, then open the cabinet door of the mobile base.
2Using the probe, align the four threaded holes in the scale (see Figure 2.2) with
the four mounting holes in the top of the cart (see Figure 2.3).
3Inside the cart, place the washers on the mounting screws, then insert the
mounting screws through the mounting holes in the cart (see Figure 2.3) and
tighten until the scale is securely attached.
4Remove the backing from the caution label, which is included with the
mounting hardware, then press the label above the “Summary Instructions”
on the back panel of the scale (see Figure 2.3).
Figure 2.2 Bottom of Smart Scale — threaded holes
Figure 2.3 Installing the scale on the base
Threaded
holes for
mounting on
cart
Place the caution label here
Mounting holes (x4)
Inside the cart, place
the washers, then insert
the mounting screws
(x4) through the
mounting holes (x4).
Cabinet door

2-4 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Before First Use
Before First Use
Initial Battery Charge
The Smart Scale has internal rechargeable batteries that automatically charge
whenever the scale is plugged into an electrical outlet. Before operating the scale
on its batteries for the first time, charge the batteries for approximately 2.5 hours to
reach full charge. The scale can be used while the batteries are charging. For more
information, see page 4-2.
Calibration Check
The scale was calibrated before shipment. However, due to local variations in the
force of gravity, which can affect calibration by as much as 20 g, recalibrate the
scale before use (see page 4-3).
CAUTION
Connect this device directly to a properly grounded hospital-grade outlet.

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 2-5
Testing the Device
Testing the Device
Perform the test procedure to ensure the Smart Scale is working properly after
performing assembly and service procedures.
Required Items:
Calibration weights (part no. 56357)
To test the Smart Scale:
1Press and hold KG/LB while pressing ON/OFF .
2Verify that all lights illuminate.
3Place the calibration weights on the scale, then confirm that the correct
weight displays.
4Press ON/OFF to turn off the scale.
NOTE
#
The charging signal only illuminates when the scale is plugged into a functioning
electrical outlet.
NOTE
#
If the device does not operate as expected, see Troubleshooting on page 5-1.

2-6 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Testing the Device

OLYMPIC SMART SCALE Model 50/51 Instruction Manual 3-1
Section
3
Operation
Operating the Smart Scale
To operate the Smart Scale:
1Press ON/OFF to turn on the scale.
A series of moving dashes appear on the display. Next, the 0 weight reading
appears, indicating the scale has automatically found its zero reference point.
2If mounted on a cart, lock the caster wheels (for the Model 51, see page 3-2).
3Adjust the platform ends, as appropriate (see page 3-3).
WARNING
Explosion hazard. Do not use this device in the presence of flammables (e.g., oxygen,
nitrous oxide, anesthetics).
CAUTION
Read and be familiar with this instruction manual before using this device.
Only use this device under the direct supervision of a licensed medical practitioner.
Connect this device directly to a properly grounded hospital-grade outlet.
If the scale is mounted on a mobile cart or table, always lock the wheel casters before
placing the patient in the scale.
Keep the platform ends in either the full-down or full-up positions. Ends are locked in
the full-up position only when LATCHED appears (see Figure 3.3).
Do not allow the patient to sit or stand on the platform ends.
Always watch the patient while on the weighing platform; to avoid injury, prevent the
patient from crawling off of the weighing platform.
Never use the scale to transport the patient.
Touching the platform or patient while the AVERAGING light is blinking can result in an
incorrect weight; see Weight Lock/Unlock (AVERAGE/UNLOCK).
Always clean/disinfect the scale between patients.
NOTE
#
It is the responsibility of the hospital/facility to ensure that all personnel who operate or
maintain this device are trained in its operation and safe use, and to maintain training
records of attendance and evidence of understanding.
NOTE
#
The scale can be used while the batteries are charging.
Only use your fingers to press the buttons. Pens and other devices may puncture the
membrane display panel.
Objects, such as blankets, placed on the scale before 0appears are not weighed—they
are automatically tared out (see page 3-4).

3-2 OLYMPIC SMART SCALE Model 50/51 Instruction Manual
Operating the Smart Scale
4Place the patient on the platform:
For still patients, the weight automatically displays. Read and record
the weight.
For active patients, press AVERAGE/UNLOCK to average the weight and
lock it on the display. Read and record the weight, then press
AVERAGE/UNLOCK to unlock the display.
Setting the Caster Brakes
To set or release the brakes:
Step on the left side of the brake lever to set the brake; step on the opposite side
to release the brake (see Figure 3.1). There are two locking casters on the
Model 51 cart.
Figure 3.1 Setting the caster brake
NOTE
#
For information on averaging the weight of an active patient, changing the display units,
and canceling the weight of objects (e.g., blankets), see page 3-4.
CAUTION
Always watch the patient while on the weighing platform; to avoid injury, prevent the
patient from crawling off of the weighing platform.
Always clean/disinfect the scale between patients.
CAUTION
Always lock the wheel casters before placing the patient in the scale.
Brake
Shown in unlocked position
Press down
to lock brake