Grainger 4802 Operating And Service Manual

SCALE-TRONIX

4802

PEDIATRIC SCALE

SECOND GENERATION WEIGHING SYSTEM

OPERATING AND SERVICE MANUAL

(SERIAL NUMBERS 21000 AND UP)

NOW WITH DISPOSABLE DURACELL BATTERIES

ECO-FRIENDLY DESIGN

SPECIFICATIONS: 4802-PEDIATRIC SCALE

GENERAL

SCALE-TRONIX® 4802 DIGITAL PEDIATRIC
SCALE: Completely self-contained scale; accurately

weighs infants and toddlers.
The scale is contained in a portable, heavy-duty

stainless steel enclosure, with integral electronic
digital readout and a sturdy transparent acrylic

weighing cradle with length gauge. The patient’s

weight is automatically locked-in and displayed
during the weighing process, and simultaneously
stored within the scale’s memory for later recall. This
feature allows the infant to be removed from the scale
prior to charting the weight. A sealed membrane
pushbutton assembly provides the operator with a
choice of pounds/ounces or kilograms for the weight
display. Other front panel pushbuttons provide
on/off/zero, reweigh and recall of the previous
patient’s weight.

The scale can be operated directly from AC line
power, or when portability is desired, from internal
batteries. Features include automatic shut-off when
operating from battery to conserve battery life;
continuous operation when powered from AC line;
and automatic switching from batteries to line power.
Sturdy handles provide for easy transport and cradle
protection.

WEIGHT DISPLAY
Large, bright, 0.43” light-emitting diode display.

Easily read in all lighting conditions. Selectable
weight display in grams, kilograms, pounds, ounces
or pounds/ounces. Weight units can be restricted
and locked out by hospital. Indicator light to show
selected units. Previous weight held in memory for
later recall.

WEIGHING CAPACITY
10-20,000 GRAMS (20KG), 44 lbs.

ACCURACY

5 grams

OPTIONS

Diaper option provides 1 gram resolution for weights
less than 1 KG.

Manual part No. 070060 (G), revised July 2014.

UNIVERSAL POWER SUPPLY

Medical grade UL listed external power supply.
100-240 VAC 50/60 Hz.
Captive but replaceable line cord.

Six (6) “DURACELL” D size alkaline batteries. With
“LOW BATTERY” warning indicators.

WEIGHING CRADLE

Removable molded acrylic cradle. Smooth weighing
surface provides easy cleaning and sanitary
maintenance. Length measurement in centimeters
and inches or centimeters only.
OPTIONAL: Extra-long or four-sided cradles.

DIMENSIONS
Overall: 27-1/2” x 16 x 7 inches
WEIGHT (uncrated)
25 pounds

ACCESSORIES

Matching stainless steel cart for mobile use.
Disposable cradle liners.

WARRANTY

One (1) year, parts and labor.

TESTING CERTIFICATION STANDARDS

Meets UL544 standard.
Meets Canadian Standards CSA C22.2 No. 125.
Constructed to International Electrotechnical
Commission IEC-601-1.

FACTORY AND SERVICE

P.O. Box 15
Wheaton, IL 60189
1-800-879-2001
1-630-653-3377

MARKETING AND SALES

200 East Post Road
White Plains, NY 10601
1-800-873-2001
1-914-948-8117

Internet: www.scale-tronix.com

PEDIATRIC WEIGHING SYSTEM

MODEL 4802

SECTION I GENERAL DESCRIPTION…………………………………….1
SECTION II ASSEMBLY – SET UP ………………………………………...3
SECTION III OPERATION OF SCALE ………………………………………7
SECTION IV TECHNICAL DESCRIPTION …………………………………12
SECTION V PARTS LIST …………………………………………………….20
SECTION VI WARRANTY……………………………………………………..24

This User’s Manual is intended to provide all necessary information and data for the proper

operation and service of the model 4802 PEDIATRIC SCALE with serial numbers 21000 and
above. This manual should be studied before installing or placing the scale in service and kept

in a safe, handy place for future reference. Refer to the scale’s serial and model numbers in all

correspondence. Feel free to call for service and operational assistance.

C

B

D

E

F

G

A

E

ILLUSTRATION 1

A. Weighing cradle with length gauge.
B. Heavy duty Stainless Steel Cabinet.
C. Front panel with membrane pushbuttons
D. Digital display
E. Carrying handles
F. Rear handle and cord holder
G. Line cord, power supply, and plug (on rear panel).

SECTION I

GENERAL DESCRIPTION

1.0 GENERAL
Congratulations! You have just purchased the only

truly modern, full-featured Pediatric scale.
Introduced in 1979, The Scale-Tronix 4800 was the

preferred pediatric scale for hospitals due to its
accuracy, reliability and rugged stainless steel

construction. Years later, we updated the scale’s

electronics to make it even more user friendly and
called the 4802. We added the 2 to denote the
second generation of our great scale. Currently, most
of these scales are still in everyday use. Scale-Tronix
has not stopped innovating and trying to incorporate
all of the great features and durability of our previous
models to meet the challenges of our modern world.
We now introduce the new improved 4802 with the
significant improvement of using disposable long life
alkaline “D” size flashlight batteries.

The 4802 can be operated from AC line power and
left on continuously for fast convenient weights; or it
can be transported on a cart, operation from its
self-contained “D” batteries for true portable

operation. The scale’s internal microcomputer will

automatically keep the scale “on” when plugged in

and time out after a period of inactivity when

operating from the batteries. Successive weighing’s

will automatically reset the time and keep the scale
turned on as long as required.

We have replaced the rechargeable battery with
standard heavy duty disposable DURACELL alkaline
D size flashlight batteries which provides several
thousand weighing’s (DURACELL only). A flashing
low battery annunciator provides adequate warning to
change batteries soon.

The clear acrylic weighing cradle readily unplugs from
the scale for easy clean-up or exchange. A variety of
cradle sizes and configurations are available to suit
your weighing needs, including four-sided and
oversized cradles. A length gauge, marked in both
inches and centimeters or centimeters only, is
conveniently provided on top of the cradle for

measuring the infant’s length during the weighing

procedure. Disposable paper cradle liners are
available to reduce clean-up and prevent
cross-contamination.

The scale’s enclosure is constructed of heavy gauge
stainless steel for durability and minimum
maintenance. Carrying handles are provided on both
sides of the enclosure for safe, convenient
movement. In addition to serving as a handle, the
rear handle serves as a line cord holder, and along
with the side handles, serve as a bumper to prevent
damage or interference with the scale if it is pushed
against a wall or other surface. Users appreciate
these helpful safeguards and features.

A stainless steel weighing cart is available that makes
the model 4802 PEDIATRIC SCALE a self-contained
mobile weighing station. The cart also features a
dispenser for disposable scale liners.

The scale employ the latest in microcomputer control
combined with user friendly software. This provides
the operator with an accurate, rugged and
easy-to-use scale. Advanced Digital Signal
Processing (DSP) provides accurate data at all times.

Audible response by a series of beeps provides
excellent operator feedback for ease of operation.
The beeper can be disabled if required.

An internal non-volatile memory stores the last

patient’s weight for later recall and charting. User

programmable features allow the operator to select
automatic shut-off times, weight resolution, weight
units, etc.

A Data Port provides serial data output to a printer,
personal computer or EMR data collection system.
Consult the factory for further details.

1.10 MECHANICAL FEATURES:

A summary of the mechanical features follows:

A. Heavy gauge stainless steel enclosure for

durability and low maintenance. Angled front
panel to maximize readability.

B. Side handles for carrying convenience and

cradle protection.

C. Rear handle for carrying, cord storage and

scale protection.

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D. Easily detachable acrylic cradle with length

gauge. Variety of cradle sizes/configurations
available.

E. Optional matching cart turns scale into a

mobile weighting station.

1.20 ELECTRONIC FEATURES:

A summary of the electronic features follows:

A. Microcomputer equipped electronics with

digital signal processing.

B. Sealed membrane panel with touch

pushbuttons.

C. Large, bright, light-emitting diode display with

function annunciators.

D. Pushbutton control of turn-on, turn-off.

E. Pushbutton selection of weight units.

Selection of weight units retained in memory
for subsequent use. Pounds or kilograms
can be locked out to suit requirements.

F. Automatic weight lock-in and display.

Reweigh function allows confirmation of
weight without removing patient from scale.
Weight stored in non-volatile memory for
subsequent recall and display.

G. Pushbutton zero to remove weight of cradle

and blankets, etc.

H. Operation from AC line or internal batteries;

automatically selected. Automatic shut-off to
conserve battery life. “LOW BATTERY”
front panel annunciator.

I. User programmable “set-up” feature allows

selection of weight units, resolution, shut-off
time, beeper, etc. Pounds or kilograms can
be locked out to suit hospital requirements.

J. Universal to 100 to 240 volt power supply

with captive but readily replaceable AC line
cord with IEC receptacle.

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SECTION II

ASSEMBLY – SET UP

The SCALE-TRONIX® model 4802 PEDIATRIC
SCALE is usually shipped with the scale and cradle in

a single carton. If the oversized cradle option was
ordered, this cradle will be shipped in a separate
carton. Please save the carton(s) and shipping
materials for possible future use if the scale is ever to
be returned to the factory for service or upgrades.
Carefully inspect the carton(s) for shipping damage
before unpacking. Contact the shipping company
and SCALE-TRONIX® immediately if shipping
damage is found. All claims must immediately be
made directly with SCALE-TRONIX®.

2.10 ASSEMBLY INSTRUCTIONS
(Refer to illustration 1)

The SCALE-TRONIX® model 4802 PEDIATRIC
SCALE is fully assembled at the factory and tested.

The scale is shipped with the weighing cradle
removed. This insures protection of the delicate
weighing transducers.

Carefully remove the acrylic weighing cradle from the
shipping carton. Remove the scale from the carton
and place it on a counter top or stable cart. 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 “right reading”.

Apply a gentle downward pressure to “plug-in” all four
posts so the cradle rests firmly on the scale.

2.20 CHECK-OUT

1. Turn the scale on by briefly pressing the
“ON / (OFF) / ZERO” pushbutton on the

front panel. A single “beep” will be heard.

The scale should display “888888” and
illuminate the “KILOS’, “POUNDS”,

“OUNCES”, “PRIOR WEIGHT” and “LOW
BATTERY” annunciators as a test of their

operation. Observe these digits and
annunciators to insure they light. The scale
will then briefly display its model number,
“4802”. During this short time period the
scale also performs some internal checks of
its operation.

2. After a short period of settling, the scale will

then automatically establish its “zero” value,

removing the weight of the cradle and any
miscellaneous items left in the cradle. The
display will show “0.000 KILOS” or “0
POUNDS O.O OUNCES” depending on its
previous mode. A series of two beeps will be
heard signaling the setting of zero.

3. Place an object to be weighed on the cradle.
A one or two liter bag of IV solution will do. A
series of moving dashes (“-----“) will be noted
on the display indicating motion of the cradle.

4. The scale will calculate and display the value
of weight on the cradle and signal it by
sounding a series of three beeps. The weight
will be displayed in either pounds/ounces or
kilograms depending on the currently
selected mode. To obtain the weight in the
other units press the ‘KILOS / POUNDS”
pushbutton on the front panel. Note the
appropriate annunciator will illuminate as the
weight is displayed. Keep in mind that if the
hospital has a requirement of locking out
pounds (or kilograms) that this switch will not
be functional.

5. Place an additional small object on the
cradle. Press the ‘REWEIGH” pushbutton
on the front panel. The scale will calculate
the new weight and re-display it as it sounds
a series of three beeps.

6. If your scale was purchased with the optional
“DIAPER WEIGHING CAPABILITY perform
steps 6, 7, and 8; otherwise skip to step 9.

Obtain a stack of about 25 standard sized (2”

x 3-1/2”) business cards to use as test
weights. Insure that the scale is properly
placed on a steady surface and that they are
not any fans or overhead vents blowing on
the cradle (with measurements as sensitive
as these, small breezes can affect the weight
readings!) Remove all items from the cradle
and press the “ON / (OFF) / ZERO”
pushbutton on the front panel to obtain a zero
reading. If necessary, set the weight mode to

“KILOS” by pressing the “KILOS /
POUNDS” pushbutton.

7. Count out fifteen (15) of the business cards
and place them on the cradle. Note the

reading on the scale’s display when it

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stabilizes. Normally this will produce a
reading of about 15 grams for typical small
business cards. (Since the cards can vary in
weight, this is only an approximation.)

8. Now toss an additional business card on the
cradle and press the “REWEIGH”
pushbutton. This will normally produce an
increase in the weight reading of 1 gram.
Repeat this process with additional cards,
pressing the “REWEIGH” pushbutton each
time and noting that the reading increases in
steps of 1 gram. (Note: the exact weight of
the cards may cause the reading to vary by 0,
1 or 2 grams.)

9. When powered from an AC line the scale will
remain on continuously. Press and hold the
“ON / (OFF) / ZERO” pushbutton on the
front panel until the scale turns off. Remove
all objects from the cradle. Unplug the scale
from the AC line. Turn the scale back on by
briefly pressing the “ON / (OFF) / ZERO” on
the front panel.

10. After the self-test and zero process, the scale
will return to displaying “0.000 KILOS” or “0
POUNDS 0.0 OUNCES” depending on its
previous mode. Press the “RECALL PRIOR
WEIGHT” pushbutton on the front panel.
The weight value from the previous weighing,
which was automatically stored in the scales
memory, will be displayed along with a
flashing PRIOR WEIGHT” annunciator. The
weight may be displayed in either kilograms
or pounds/ounces by pressing the
“KILOS/POUNDS” pushbutton (unless
locked out).

11. Leave the scale on and determine that it
shuts off after a period of about 90 seconds.
(Pressing any of the pushbuttons will reset
the time and start the timing period over.) If
the timing period is different from the
specified 90 seconds see section 2.40
“OPTION SET-UP”.

12. If the “LOW BATTERY” annunciator flashes
during the process, it indicates the batteries
need replacing. Replace with size D
“DURACELL” alkaline batteries only.

13. If the optional cart has been purchased follow
the assembly instructions included with it.
The model 4802 PEDIATRIC SCALE may
then be mounted on it.

14. This completes the assembly and check-out
procedure.

2.30 CALIBRATION
The SCALE-TRONIX® model 4802 PEDIATRIC

SCALE is fully tested and calibrated before leaving

the factory. No further calibration is normally required.
The calibration procedure is outlined in section 4.40.

2.40 OPTION CUSTOM “SET-UP”
The SCALE-TRONIX® model 4802 PEDIATRIC

SCALE incorporates a unique feature that lets you

“customize” the scale to best suit your needs. This

“set-up” mode allows the characteristics of the scale

to match your particular requirements. Items that can
be selected include the automatic shut-off time,
weighting units, beeper, etc.

2.41 ENTERING THE “SET-UP” MODE

To enter the “set-up” mode, start with the scale turned
off. Note the “Print/Send/Data” button located
directly to the right of the “RECALL PRIOR
WEIGHT” pushbutton on the front panel of the
enclosure. Press and hold this “Print/Send/Data”
pushbutton on the front panel while turning the power
on with the “ON / (OFF) / ZERO” pushbutton. Once

the scale turns on, release the “Print/Send/Data”

pushbutton, then press and release it 5 more times.
The scale will display “SEt-UP” and produce a series
of four long beeps. “Set-up” mode has now been
entered.

The “RECALL PRIOR WEIGHT” pushbutton is used
to select the particular option value. Once this value
is selected, the scale can be advanced to the next
option by again pressing the “Print/Send/Data”
pushbutton or it can be shut-off by pressing and
holding the “ON / (OFF) / ZERO” pushbutton.

2.42 SETTING THE OPTIONS

First enter the “set-up” mode as explained above.

1. Press the “Print/Send/Data” pushbutton.
The scale will display “SOFt” (software
version). Press the “Print/Send/Data”
pushbutton again. The software version will
be display (i.e. “U 1.00.4”). This is provided
as a reference aid in determining which
features are contained within the software.

2. Press the “Print/Send/Data” pushbutton.

The scale will display “dAtE” (date). Again

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press the “Print/Send/Data” pushbutton.
The release date of the software will be
displayed. A display of “07.15.97” would
correspond to July 15, 1997. This is provided
as a reference aid in determining which
features are contained within the software.

3. Press the “Print/Send/Data” pushbutton.
The scale will display “SCALE”. Press the
“Print/Send/Data” pushbutton again; the
model number of the scale will be displayed
“4802”. This is provided as a reference aid
to help with customer trouble-shooting and is
set at the factory.

4. Press the “Print/Send/Data” pushbutton.
The scale will display “AutOFF” (automatic
shut-off time). Again press the
“Print/Send/Data” pushbutton. The
currently selected number of seconds before
the scale shuts-off will be displayed. This is
normally set at the factory to be 90 seconds.
It can be altered in 15 second increments
from 15 seconds to 180 seconds (3 minutes).
An additional “Cont” (continuous) option is
provided for some special applications; this
prevents the scale from automatically
shutting-off; the scale can then only be
turned off by pressing and holding the “ON /
(OFF) / ZERO” pushbutton. Use of the
continuous mode of operation is not
recommended since it will discharge the
battery if the operator forgets to deliberately
turn the scale “off”.
To alter the length of the automatic shut-off
time press the “RECALL PRIOR WEIGHT”
pushbutton. The automatic shut-off time will
advance through the available options. Stop
at the desired time interval.

5. Press the “Print/Send/Data” pushbutton.
The scale will display “AC con” (AC power
continuous operation). This feature is used
in the model 4802 PEDIATRIC SCALE to
cause the scale to remain “on” as long as AC
power is provided (automatic shut-off will not
occur. Pressing the “Print/Send/Data”
pushbutton again will show this option
selected as “On” or “OFF”. To alter the
selection, press the “RECALL PRIOR
WEIGHT” pushbutton.

6. Press “Print/Send/Data” pushbutton. The
scale will display “UnitS” (weight units).
This is the start of the various weight units
(kilograms, pounds, ounces, pounds/ounces)

that can be selected. Use the “RECALL
PRIOR WEIGHT” pushbutton to set each
weight unit “On” or “OFF”. NOTE: If all the
units are set to “OFF” the scale will
automatically default to “KILOS”.

7. Press the “Print/Send/Data” pushbutton
again. The “KILOS” annunciator will light
and the display will show “On” or “OFF”.
Setting this to “On” will allow display of the
weight in kilograms with a display of “0.000”.
Normal setting as shipped from the factory is
“On”.

8. Press the “Print/Send/Data” pushbutton
again. The “POUNDS” and “OUNCES”
annunciators will light and the display will
show “On” or “OFF”. Setting this to “On”
will allow display of “0” (pounds) 0.0

(ounces)”. Normal setting as shipped from

the factory is “On”.

9. Press the “Print/Send/Data” pushbutton
again. The “POUNDS” annunciator will light
and the display will show “On” or “OFF”.
Setting this to “On” will allow display of the
weight in pounds with a display of “0.000”.
Normal setting as shipped from the factory is
"OFF”.

10. Press the “Print/Send/Data” pushbutton
again. The “OUNCES” annunciator will light
and the display will show “On” or “OFF”.
Setting this to “On” will allow display of the
weight in ounces with a display of “0.00”.
Normal setting as shipped from the factory is
“OFF”.

11. Press the “Print/Send/Data” pushbutton.
The scale will display “bEEPEr” (audio
beeper). Press the “Print/Send/Data”
pushbutton again. “On” or “OFF” will be
displayed. This may be changed by pressing
the “RECALL PRIOR WEIGHT” pushbutton.
Setting this option to “OFF” will eliminate the
audible signal that occurs when a front panel
pushbutton is pressed or a weight is locked in
Normal setting as shipped from the factory is
“On”.

12. Press the “Print/Send/Data” pushbutton. If
equipped at the factory with the data port the
scale will display “rS-232”, indicating the
start of the serial data port options. Separate
detailed instructions for this feature are
available from the factory. Call us at

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