SR Instruments SRScales SR555 Service manual

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 1 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
by SInstruments, Inc.
Operating and Service
Manual
Serial Numbers: 1800+
Model SR555
Stand-On Scale System

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 2 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
TABLE OF CONTENTS
TABLE OF FIGURES......................................................................................................................2
PACKING CHECKLIST.................................................................................................................3
ASSEMBLY.......................................................................................................................................4
REPLACEMENT PARTS AND ACCESSORIES ........................................................................6
SYSTEM DESCRIPTION AND INTENDED USE.......................................................................7
MAINTENANCE AND CLEANING..............................................................................................7
STORAGE AND TRANSPORTATION ........................................................................................8
SPECIFICATIONS...........................................................................................................................9
BUTTON FUNCTIONS.................................................................................................................10
BASIC SYSTEM OPERATION....................................................................................................10
BATTERY REPLACEMENT.......................................................................................................11
THEORY OF OPERATION .........................................................................................................12
CALIBRATION..............................................................................................................................13
INITIALIZATION .........................................................................................................................14
TROUBLESHOOTING.................................................................................................................15
WARRANTY...................................................................................................................................16
TABLE OF FIGURES
Figure 1: Assembly Diagram .........................................................................................................4
Figure 2: Cable Clamp, Display Cable, Connector, and Set Screws..........................................5
Figure 3: Battery Compartment Diagram....................................................................................5
Figure 4: Handrail/Height Bar Diagram......................................................................................6
Figure 5: Button Display..............................................................................................................10
Figure 6: Bottom of Scale Base....................................................................................................11
Figure 7: Calibration Button Diagram.......................................................................................13
Figure 8: Location of Internal Initialization Buttons................................................................14

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 3 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
PACKING CHECKLIST
SR555 Stand-On Scale
DESCRIPTION QUANTITY
Box 1
BASE ASSEMBLY (FIVE (5) SET SCREWS IN PLACE) 1 ea
MAST 1 ea
DISPLAY UNIT WITH CABLE (FIVE (5) SET SCREWS IN PLACE) 1 ea
PACKAGE OF SIX (6) “C” CELL BATTERIES 1 ea
LOCTITE1 ea
1/8” ALLEN WRENCH 1 ea
QC INSPECTION SHEET 1 ea
CALIBRATION CERTIFICATE 1 ea
WARRANTY CARD 1 ea
MANUAL 1 ea
Box 2
OPTIONAL HANDRAIL SET WITH HARDWARE 1 ea
OPTIONAL HEIGHT BAR 1 ea

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 4 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
ASSEMBLY
STEP 1: Unpack the scale system and check parts
against the PACKING CHECKLIST. If there are any
missing or damaged parts, please call the service hotline
at 1-800-654-6360.
STEP 2: (Figure 1) Verify that the serial number on the
Display Unit (1) matches that on the Base Assembly (2).
STEP 3: Remove the four (4) set screws from Base
Assembly collar and apply a small amount of Loctite
to each. Insert Mast (3) into Base Assembly collar and
seat firmly. Re-install set screws in Base Assembly
collar and tighten securely.
STEP 4: Feed the display cable down through the Mast
and pull out through the Base Assembly.
STEP 5: Remove the set screws from the Display Unit
collar. Set the Display Unit squarely on top of the Mast
with the display label facing the scale platform. Apply a
small amount of Loctiteto the four (4) set screws and
reinstall the set screws, tightening securely.
# PART NAME
1Display Unit
2Base Assembly
3Mast
4Cable Clamp
5Display Cable Connector
6Handrails (optional)
7Height Bar (optional)
8Battery Compartment
Figure 1: Assembly Diagram
Continued next page
1
7
8
3
6
2

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 5 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
ASSEMBLY cont’d
STEP 6: (Figure 2) Lay the system on its side
and remove the Cable Clamp (4) from the Base
Assembly. Attach the Display Cable Connector
(5) to its mate in the Base Assembly.
STEP 7: (Figure 2) IMPORTANT: Reinstall
the Cable Clamp! Set the display cable into the
groove under the Cable Clamp and reinstall the
Cable Clamp, leaving just enough slack to
alleviate any tension on the Display Cable
Connector. Securely tighten the two (2) Cable
Clamp screws. Slide the extra cable back up into
the Mast. Excess cable MUST NOT contact the
floor.
STEP 8: (Figure 3) Open the Battery Compartment cover
and install the six (6) supplied “C” cell batteries as indicated
on the cover diagram. Tightly close the cover.
STEP 9: Return the scale to the upright position.
Figure 2: Cable Clamp, Display Cable, Connector,
and Set Screws
Figure 3: Battery Compartment Diagram
4
5
Continued next page

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 6 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
ASSEMBLY cont’d
INSTALLING OPTIONAL HANDRAILS
STEP 1: (Figure 4) Attach top of each of the Handrails (6) to the bottom right and left of the
Display Unit (1) with the two (2) screws and two (2) split-lock washers on each side and slightly
tighten. (Do not tighten all of the way.)
STEP 2: Attach the bottom of the Handrails to the right and left side of the Base Assembly
using one (1) screw and one (1) split-lock washer for each handrail. Tighten all six (6) screws
securely.
INSTALLING OPTIONAL HEIGHT BAR
STEP 1: (Figure 4) Remove the set screw on the back
of the Display Unit (1) and in the Base Assembly (2).
STEP 2: Slide the Height Bar (7) down through the
hole in the Display Unit and seat firmly into the Base
Assembly. Apply a small amount of Loctiteto the two
(2) set screws and reinstall, tightening securely.
REPLACEMENT PARTS and ACCESSORIES
Figure 4: Handrail/Height Bar Diagram
Part # Description
SR3070 Handrail Set with assembly hardware
SR3086 Height Bar: Extends from 43 in to 79 in (109 cm to 201 cm)
6
1
2
7

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 7 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
SYSTEM DESCRIPTION and INTENDED USE
SYSTEM DESCRIPTION
The SR555 Stand-On Scale System employs the latest in microprocessor and load cell technology
to provide accurate and repeatable weight data. Four (4) identically matched transducers are
strategically placed to ensure an accurate representation of the patient’s weight.
The low power microprocessor circuitry allows the SR555 to derive its power from six (6)
common “C” cell batteries that will provide up to 10,000 weight readings before needing
replacement. This eliminates the need for an external battery charger or the danger of an AC
power supply cord on a portable scale.
The patient’s weight is displayed on a 16-character dot matrix LCD. With a push of a button,
weight data may be viewed, in either pounds or kilograms, with a displayed resolution of 0.1 for
each.
INTENDED USE
The SR555 Stand-On Scale System is specifically
designed for use as a stand-on scale for weighing
ambulatory patients. Optional equipment includes a
Handrail Set and Height Bar. SR555 Stand-On Scale
System is a preferred means of gathering patient weight
data of ambulatory patients weighing up to 1000
pounds or 454 kilograms.
MAINTENANCE and CLEANING
SR555 Stand-On Scale System is made of
powder-coated aluminum casting with
stainless steel riser posts. Exercise caution
when cleaning the display window as it is
made of clear polyester and can be scratched
by abrasive cleaners. Mild soap and water is
recommended for general cleaning and
disinfecting.
WARNING
DO NOT use pressurized water or steam.
The scale system contains microprocessor
circuitry and strain gauge sensors that may
be adversely affected by exposure to such an
environment.
WARNING
DO NOT EXCEED
MAXIMUM WEIGHT LIMIT OF
1000 LB / 454 KG

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 8 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
STORAGE and TRANSPORTATION
STORAGE
If storing this equipment for periods longer than three (3) months, remove the batteries. To
maintain proper operation of this instrumentation, storage and transport conditions should not vary
outside the following conditions: Relative Humidity 0% to 85%, Ambient Temperature 14F to
122F (-10C to +50C).
TRANSPORTATION
To transport the SR555, lower the Height Bar if included, tilt the scale back and wheel to the new
location. Lower the platform back down to the floor being careful not to shock the scale.

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 9 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
SPECIFICATIONS
MAXIMUM WEIGHT CAPACITY 1000 lb or 454 kg
PLATFORM SIZE 15 3/4 in x 18 1/2 in (40 cm x 47 cm)
DISPLAY TYPE 16-Character Dot-Matrix LCD
DISPLAY RESOLUTION 0.1 lb/0.1 kg
ACCURACY 0.1% +/- 1 digit of displayed resolution for calibrated
range
AUTO ZERO One button operation
AUTO POWER DOWN Approximately 35 seconds
HOLD Stores displayed reading in memory
LAST WEIGHT RECALL Press hold button to recall last stored displayed reading
AVERAGING Automatic digital filter
POWER SUPPLY Six (6) “C” cell batteries
Low battery indicator on Display
CALIBRATION Calibration is traceable to NIST standards.
OPERATING CONDITIONS
Normal operating conditions forthis product:
Ambient Temperature Range: 68F to 85F (20C to
30C) Relative Humidity Range: 0%-85%
Avoid exposure to high-pressure water or steam.
TRANSPORTATION and
STORAGE
Storage and transportation conditions should not vary
outside the following conditions: Relative Humidity
0% to 85%, Ambient Temperature 14F to 122F
(-10C to +50C). Remove batteries if storing longer
than three (3) months.

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 10 of 18
SInstruments, Inc.,600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [e-mail] Copyright 2006 SInstruments, Inc.
BUTTON FUNCTIONS
ZERO The “ZERO” button is used to zero the system before placing a patient onto the scale
system. When pressed, the display message will indicate “ZEROING” “PLEASE
WAIT” “HANDS OFF” “PLEASE WAIT". Ensure that nothing is in contact with the
weighing surface during this procedure. The display will read “WEIGHT 0.0 LB” (or
KG).
WEIGH
The “WEIGH” button wakes up the display and shows the patient’s weight if it should
Auto Power Down before the weighing process is done.
HOLD The “HOLD” button freezes the displayed weight and stores it away in memory. Press
“HOLD” to store the weight into memory. To recall last weight reading, press “HOLD”.
LB/KG MODE
Weight data may be viewed in either pounds or kilograms. Pressing the “LB/KG
MODE” button allows the operator to toggle between the two readings. Both pounds and
kilograms are displayed in a resolution of 0.1.
BASIC SYSTEM OPERATION
SETTING SYSTEM ZERO
Make sure the scale is free and clear of any obstructions and press the “ZERO” button. The
displayed message will indicate “ZEROING” “PLEASE WAIT” “HANDS OFF”
“PLEASE WAIT”. Make sure that nothing is in contact with the scale while zeroing the
system. In a few seconds, the display will read “WEIGHT 0.0 LB” (or KG). Note: If
patient will be using a cane for support on the scale, place the cane on the scale while zeroing the
system. This will ensure that the patient’s NET weight will be displayed. It is recommended that
the system be zeroed prior to each new patient.
After the scale has been set to zero, position the patient on the scale. Display will indicate the
patient’s weight in either pounds or kilograms
Figure 5: Button Display
Press box under each icon to activate command
Continued next page