Welch Allyn 4802D Directions For Use Manual

Welch Allyn Pediatric/Infant Scale

Directions for use

Model 4802D

© 2016 Welch Allyn. All rights are reserved. To support the intended use of the product described in this
publication, the purchaser of the product is permitted to copy this publication, for internal distribution
only, from the media provided by Welch Allyn. No other use, reproduction, or distribution of this
publication, or any part of it, is permitted without written permission from Welch Allyn.

Welch Allyn assumes no responsibility for any injury to anyone, or for any illegal or improper use of the
product, that may result from failure to use this product in accordance with the instructions, cautions,
warnings, or statement of intended use published in this manual.

Software in this product is Copyright 2016 Welch Allyn or its vendors. All rights are reserved. The
software is protected by United States of America copyright laws and international treaty provisions
applicable worldwide. Under such laws, the licensee is entitled to use the copy of the software
incorporated with this instrument as intended in the operation of the product in which it is embedded.
The software may not be copied, decompiled, reverse-engineered, disassembled, or otherwise reduced
to human-perceivable form. This is not a sale of the software or any copy of the software; all right, title,
and ownership of the software remain with Welch Allyn or its vendors.

For information about any Welch Allyn product, contact your local Welch Allyn representative: http://

www.welchallyn.com/en/other/contact-us.html.

724510

DIR 80020843 Ver. C Revision date: 2016-07

Welch Allyn, Inc.

4341 State Street Road

Skaneateles Falls, NY 13153 USA

www.welchallyn.com

This manual applies to 901110 NONMASTED SCALES.

Contents

Introduction ............................................................................................. 1

Assembly and setup ................................................................................ 5

iii

Intended use ........................................................................................................ 1

Indications for use ................................................................................................ 1

Symbols ............................................................................................................... 1

About warnings and cautions ............................................................................... 2

Controls and indicators ........................................................................................ 3

Assembly instructions .......................................................................................... 5

Custom setup ...................................................................................................... 5

Scale operation ........................................................................................ 9

Power options ...................................................................................................... 9

Audible beeps ...................................................................................................... 9

One-gram weighing option ................................................................................ 10

Weighing procedure ........................................................................................... 10

Storage, cleaning, and maintenance ................................................... 11

Storage ............................................................................................................... 11

Cleaning ............................................................................................................. 11

Battery replacement .......................................................................................... 11

Maintenance ...................................................................................................... 12

Troubleshooting ................................................................................................. 12

Appendices ............................................................................................ 15

Specifications ..................................................................................................... 15

Product configurations ....................................................................................... 16

Approved accessories ........................................................................................ 16

Warranty ............................................................................................................ 16

iv Contents Welch Allyn Pediatric/Infant Scale

Introduction

Intended use

The Welch Allyn Pediatric/Infant Scale is intended to be used by clinicians for weighing
patients from 0.35 oz to 44 lbs (10 g to 20 kg) and measuring patients up to 32 inches
(81 cm), depending on the size of the scale cradle.

1

Indications for use

The Welch Allyn Pediatric/Infant Scale is used by clinicians to weigh and measure the
length of neonate and pediatric patients.

Symbols

Documentation symbols

WARNING The warning statements in
this manual identify conditions or
practices that could lead to illness, injury,
or death. Warning symbols will appear
with a grey background in a black and
white document.

Consult Directions for Use

Shipping, storing, and environment symbols

Temperature limit

Caution The caution statements in this
manual identify conditions or practices
that could result in damage to the
equipment or other property, or loss of
data.

Keep dry

Separate collection of Electrical and
Electronic Equipment. Do not dispose as
unsorted municipal waste.

Fragile

2 Introduction Welch Allyn Pediatric/Infant Scale

Humidity limitation

This way up Stacking limit by number

Recyclable

Miscellaneous symbols

Manufacturer

Product Identifier For indoor use only

Atmospheric pressure limitation

Reorder Number

Serial Number Prescription only or "For Use by or on the

Battery Power

About warnings and cautions

Caution statements can appear on the Welch Allyn Pediatric/Infant Scale, the packaging,
the shipping container, or in this Directions for use.

The Welch Allyn Pediatric/Infant Scale is safe for patients and clinicians when used in
accordance with the instructions and caution statements presented in this Directions for
use.

Before using the device, you must familiarize yourself with all cautions, with the steps to
power up the device, and with the sections of this Directions for use that pertain to your
use of the device. In addition to reviewing the general cautions presented in the next
section, you must also review the more specific cautions that appear throughout the
manual in conjunction with setup/startup, operation, and maintenance tasks.

Failure to understand and observe any warning statement in this manual could lead

•
to patient injury or illness.

• Failure to understand and observe any caution statement in this manual could lead to
damage to the equipment or other property, or loss of patient data.

order of a licensed medical professional"

Directions for use Introduction 3

General warnings and cautions

WARNING Patient injury risk. Never leave the infant unattended on the
scale. Only remove your hands from the infant for a brief amount of time to
allow for an accurate weight measurement.

WARNING Patient injury risk. Make sure the cradle is properly cleaned
between patients. The use of disposable paper sheets in between weight
measurements is also recommended.

WARNING Patient or operator injury risk. Make sure the scale is
positioned on a stable surface and in a way to avoid shock or bumping
hazards.

CAUTION Make sure that you routinely perform general maintenance and
equipment safety checks on your scale. Remove the scale from service
when you notice damaged power cords.

CAUTION Make sure the scale is set in the proper measurement units for
your facility. Make sure you record the measurement units as they are
displayed.

CAUTION Do not use this scale to transport patients or items.

Controls and indicators

Scale

1 Weighing cradle with length gauge

2 Rear handle and cord holder

3 Carrying handles

4 Front panel with push buttons

4 Introduction Welch Allyn Pediatric/Infant Scale

5 Digital display

6 Stainless steel cabinet

N/A Line cord, power supply, and plug (on rear panel)

Front panel buttons

Button Function

ON / (OFF) /
ZERO

KG / LB Press this button to change the scale between kilograms and pounds.

REWEIGH Press this button to perform a new weighing cycle.

RECALL PRIOR
WEIGHT

DATA SEND

Briefly press this button to turn the scale on.

Press and hold this button to turn the scale off.

Note

Press this button to display the weight stored in the scale's memory.

Pressing this button when the scale is connected to a computer sends the current measurement to the
computer.

Press this button in conjunction with ON / (OFF) / ZERO to enter the setup mode.

If you purchased a scale with the kilograms-only option, this button is not present.

Assembly and setup

The scale is fully assembled at the factory and tested. In some instances, the scales are
shipped assembled. However, due to size and shipping restrictions, most scales are
partially disassembled. If assembly is required, it can be done with common hand tools.
When special tools are required, they are supplied with the scale. Ensure that all bolts
and fasteners are securely tightened.

Use the following instructions to assemble and setup your scale for use.

5

Assembly instructions

The scale is fully assembled at the factory and tested. The scale is shipped with the
weighing cradle removed.

1.

Carefully remove the acrylic weighing cradle from the shipping carton.

2. Remove the scale from the shipping carton and place it on a stable surface.

3. Position the cradle over the scale so the four metal mounting posts line up with the
holes in the top of the scale.

Note the length gauge and rotate the cradle if necessary so the length gauge is
positioned correctly.

4. Apply gentle downward pressure to seat all four posts so the cradle rests firmly on
the scale.

Custom setup

You can customize the scale to best suit your needs. Configurations that can be selected
include the automatic shut-off time, weighting units, beeper, and more.

Enter custom setup mode

1. Make sure that the scale is powered down.

2. Press and hold DATA SEND while pressing ON / (OFF) / ZERO.

3. Before the scale powers up completely, release DATA SEND then press and release
it five more times.

The scale displays SEt-UP and produce a series of four long beeps.

6 Assembly and setup Welch Allyn Pediatric/Infant Scale

Set the options

Enter the custom setup as described.

Press DATA SEND to scroll through the custom setup options.

The options displayed with each press are as follows:
Press RECALL PRIOR WEIGHT to turn these options On or OFF.

Note Options indicated with an asterisk (*) require an additional

press of DATA SEND to change the value.

Option displayed Feature

SOFt This option displays the software version of your scale.

dAtE This option displays the release date of the software. The format is MM/DD/YY.

SCALE This option displays the model number of the scale.

AutOFF* This displays the number of seconds before the scale turns off when operating on battery power.

The Cont value prevents the scale from turning off automatically.

AC con* This option causes the scale to remain on when plugged in to AC power.

rES This option allows you to change the resolution of weight if you ordered the 1-gram option.

Pressing RECALL PRIOR WEIGHT switches between the following options:

0.005

0.010

On scales without the 1-gram option, you cannot change the weight resolution.

UnitS* This option allows you to change the displayed weight unit.

Note Do not change the scale units if you have purchased the kilogram-only option.

KILOS* This option allows the weight to display in kilograms.

POUNDS and OUNCES* This option allows the weight to display in pounds and ounces.

POUNDS* This option allows the weight to display in pounds.

OUNCES* This option allows the weight to display in ounces.

bEEPEr* This option determines the audible signal that occurs when a front panel button is pressed.

rS-232 Detailed instructions for this feature are available from Welch Allyn. Go to http://

www.welchallyn.com/en/other/contact-us.html to find your local representative.

OutPut* This option displays the current data port output option. Detailed instructions for this feature are

available from Welch Allyn. Go to http://www.welchallyn.com/en/other/contact-us.html to find
your local representative.

Set the value to OFF to disable the RS-232 port.

PrtUnt*

This option determines whether pounds or kilograms are displayed on data sent to a computer.

If the pounds and kilograms indicators are illuminated on the control panel, the data sent is
determined by whichever unit is selected on the control panel.

If the kilogram indicator is illuminated, it will only send data in kilograms, regardless of the unit
is selected on the control panel.

If the pounds indicator is illuminated, it will only send data in pounds, regardless of the unit is
selected on the control panel.

Directions for use Assembly and setup 7

PrtOPT*

Press RECALL PRIOR WEIGHT to choose between the following options:

PnlPrt: The current weight is sent to a computer when DATA SEND is pressed on the

control panel.

AutPrt: The current weight is automatically sent to a computer when a weight reading occurs.

bAud*

This option allows you to set the baud rate. Values are 1200, 2400, 4800, 9600, and

19200.

pArity*

This option allows you to change the parity between the following options:

Off: No parity, 8 data bits
Odd: Odd parity, 7 data bits
EuEn: Even parity, 7 data bits

Sot.Eot This option allows checking for a complete data string in some applications.

CAr.rET This option allows a single carriage return followed by a single line feed after the data string.

Ln.FEEd This option allows a single line feed followed by a single carriage return after the data string.

StPbit*

This option allows you to change the stop bits between the following options:

1 bit: One stop at the end of a word
2 bits: Two stops at the end of a word

rtS.ctS*

Prtbtn*

rtEPrt*

PC brd*

SEt-UP

This option allows you to turn On or Off RS-232 serial transmissions.

This option allows you to turn On or Off the front panel DATA SEND button.

This option allows you to turn On or Off the enabling of sending data from a remote location
by connecting the receive line to the ground.

This option displays the model number of the printed circuit board. A second press of DATA

SEND displays the revision of the printed circuit board.

This option is displayed when you have cycled through all the options. Press and hold ON to
power down the scale.

8 Assembly and setup Welch Allyn Pediatric/Infant Scale

Scale operation

Power options

The scale can be used with battery power or with AC power.

Battery power

CAUTION Use only size D disposable alkaline batteries. The use of any

other battery will void the warranty.

9

Press ON / (OFF) / ZERO to turn on the scale.

The scale automatically turns off after 90 seconds of non-use when operating on battery
power.

The LO BATT indicator displays when the battery power is low.

bAttrY displays when the batteries are unable to properly power the scale.

Replace the batteries when either of these messages are displayed.

AC power

When plugged in, the scale continuously runs on AC power automatically.

The scale switches to battery power when AC power is not present.

Audible beeps

The following beeps occur when using the scale.

Sound Meaning

One beep Acknowledgment of a button press.

Two beeps A zero weight is obtained.

Three beeps Weight reading is obtained and displayed.

Four long
beeps

Long/short
beeps

The battery is too weak to operate the scale.
The scale has entered custom setup mode.

There is a problem with the scale. See the troubleshooting section.

10

Scale operation Welch Allyn Pediatric/Infant Scale

Continuous
long beep

There is a problem with the scale. See the troubleshooting section.

One-gram weighing option

This purchasable option allows the scale to display weights below 1 kilogram in 1-gram
increments with 1-gram resolution. It is automatically enabled whenever the weight on
the cradle is less than 1 kilogram.

Weighing procedure

Make sure to select a consistent time of day to obtain a weight measurement.

Position the scale in a convenient and stable location.

Make sure the scale is clean and prepared for taking a weight measurement.

1. Press ON / (OFF) / ZERO to turn on the scale.

The scale goes through the startup sequence.

2. Prepare the infant for weighing. Remove clothing and dressing.

3. Place the infant on the scale so that the weight is distributed evenly near the center
of the scale.

WARNING Patient injury risk. Never leave the infant
unattended on the scale. Only remove your hands from the
infant for a brief amount of time to allow for an accurate
weight measurement.

4. Stabilize the infant as necessary with your hand. Remove your hand from the infant,
but always keep your hands close in case re-stabilization is required.

Note Do not touch the infant while the weight measurement is in

process.

5. The scale displays a series of moving dashes as it waits for stabilization and
calculates the weight.

Once the measurement is obtained, the scale beeps three times and displays the
weight on the front panel.

6. Return the infant to his or her bassinet or incubator.

7. If necessary, press REWEIGH to perform another weight measurement.

8. If necessary, press RECALL PRIOR WEIGHT to display the previously stored scale
measurement.

Note A measurement is stored in the scale until a new weight is

taken and zeroes out.

A stationary display of - - indicates a negative weight. Press ON / (OFF) / ZERO to set
the zero.

If O-LOAd is displayed, the capacity of the scale has been exceeded.

Storage, cleaning, and maintenance

Storage

The scale should be stored on a stable surface. If not, the scale should be stored in a
convenient storage facility or closet. At no time should the scale be lifted by grasping the
cradle. During storage or shipping, disconnect the cradle from the scale to prevent
damage to the scale’s electronic transducers.

11

Cleaning

Scale

1. Clean the scale after every use.

2. Use one of the following products when cleaning your scale:

70 percent isopropyl alcohol

PDI Sani-Cloths

Cradle

1. Clean the cradle after every use.

2. Use soap and water to clean the scale cradle.

CAUTION Do not clean the cradle with alcohol or other
drying agents.

Battery replacement

CAUTION Use only size D disposable alkaline batteries. The use of any
other battery will void the warranty.

®

1. Remove the cradle from the scale.

2. Remove the top cover of the enclosure by removing the eight hex screws with a 1/8­inch allen wrench.

3. Install six new size D batteries in the battery holder. Make sure to follow the polarity
instructions.

4. Re-attach the top cover of the enclosure by installing the eight hex screws. Make
sure the operation label is facing the correct direction.

12 Storage, cleaning, and maintenance Welch Allyn Pediatric/Infant Scale

5. Re-install the cradle by gently pressing down.

Maintenance

Routinely perform the following preventive maintenance to keep your scale in working
order.

1. Check the calibration annually or as required.

2. Inspect the cradle for cracks or loose mounting hardware. Replace or repair as
necessary.

3. Inspect the scale’s enclosure for damage or loose or missing hardware. Replace or
repair as necessary.

4. Inspect the AC line cord for abrasions or other signs of wear.

5. Do not expose the scale to excessive water or moisture.

6. Do not store the scale where heavy objects can be placed on it.

7. Replace the batteries annually or as required.

Troubleshooting

This section presents tables of information to help you troubleshoot issues with the
scale.

To use these tables, locate the specific problem with your scale in the left column of the
table. The remainder of the row explains possible causes and suggests actions that can
resolve the issue.

Issue

The display does not illuminate No power is supplied to the scale Make sure that the scale is

The weight reading takes too long
to display

The scale displays CAbLE

Possible cause Suggested action

plugged in.

Make sure that the batteries are
properly installed and are in good
condition.

The cable between the display board and the
instrument board is disconnected

The membrane keyboard and the display board
are disconnected

The cradle is in motion Wait for the cradle to settle.

A signal outside the range of the internal A/D
converter has been applied

Contact your service department.

Contact your service department.

Contact your service department.

The scale displays O-LOAd

The reading does not change when
weight is applied to the scale

The object on the scale is larger than the
maximum value allowed

The load cell transducer, connector, or cable may
be defective

If the weight value is within the
specified range, contact your
service department.

Contact your service department.

Directions for use Storage, cleaning, and maintenance 13

Issue Possible cause Suggested action

The scale buttons are not
responding

The error message E-FAIL is
displayed

The error message r-FAIL is
displayed

The buttons are damaged Check for visible signs of

damage.

Contact your service department.

The scale's EEPROM memory has failed Contact your service department.

The scale's random access memory has failed. Contact your service department.

14 Storage, cleaning, and maintenance Welch Allyn Pediatric/Infant Scale

Appendices

Specifications

Item Specification

Scale 4802D

15

Resolution (factory default) 0.2 oz/5 g

1-gram option: 1 g below 1 kg

Weighing range 0.35 oz to 44 lbs (10 g to 20 kg)

Readout

Power source

Dimensions

Large, bright, light-emitting diode display.

Selectable weight display in grams, kilograms, or pounds and ounces.

Indicator light to show selected units.

Battery

• 6 D alkaline batteries.

Power adapter:

• Medical grade UL listed external power supply

• Nominal input voltage: 100-240V AC ±10%

• Nominal input frequency: 50/60 Hz

• Nominal input current: 0.3-0.15Arms @ max load

• Standby power consumption at UIn: 230V AC : ≤ 0.1W

• Nominal output volt age: U

• Nominal output current: I

Platform with carrying handles: 27.5 in x 16 in. x 7 in.

Cradle:

• Standard – 25 in. x 14 in.

• Oversized – 32 in. x 14 in.

• Four Sided – 25 in. x 14 in.

: 12V DC +5% / -5% UBr : ≤ 150mVpp

out

: 1000mA

out

16 Appendices Welch Allyn Pediatric/Infant Scale

Product configurations

The Welch Allyn Pediatric/Infant Scale is available in the following configurations:

Model 4802D, Pediatric/Infant Scale

Model Description

4802D-AK Pediatric/Infant Scale, 1 g resolution, kg only

4802D-AX Pediatric/Infant Scale, 1 g resolution, standard weight

4802D-XK Pediatric/Infant Scale, standard resolution, kg only

4802D-XX Pediatric/Infant Scale, standard resolution, standard weight

Approved accessories

Part number Description

Warranty

20009 Battery pack

48200W Standard cradle

48220W Four-sided cradle

48222 Oversized cradle

48217 Scale liners (500 per carton)

48800-1 Mobile weighing cart with tissue dispenser

Welch Allyn will warranty the weight scale to be free of defects in material and
workmanship and to perform in accordance with manufacturer specifications for the
period of one year from the date of retail purchase.

The warranty period shall start on the date of purchase. The date of purchase is: 1) the
invoiced ship date if the device was purchased directly from Welch Allyn, 2) the date
specified during product registration, 3) the date of purchase of the product from a
Welch Allyn authorized distributor as documented from a receipt from said distributor.

This warranty does NOT cover damages caused by misuse or abuse, including but not
limited to:

Failure caused by unauthorized repairs or modifications

•

• Damage caused by shock or dropping during transportation

• Damage caused by improper use of the power supply

• Failure caused by improper operation not consistent with the instructions stated in
this Directions for use

Directions for use Appendices 17

Should this device require maintenance (or replacement at our option) under warranty,
contact your local Welch Allyn representative: http://www.welchallyn.com/en/other/

contact-us.html

Material No. 724510