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

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 11 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.
BASIC SYSTEM OPERATION cont’d
CONTINUOUS WEIGH
In this default mode, the weighing surface remains active. Press the “HOLD” button once to lock
the displayed reading and store it in memory as the “last weight” for recall later if needed.
AUTO-HOLD
This mode is for patients unable to remain still for the weighing procedure. It locks, stores, and
displays the patient’s weight as soon as the “WEIGH” button is pressed once. Note: No weight
will be displayed until the button is pressed.
To enable this mode, BEFORE zeroing the system, press and hold the “HOLD” button for
approximately five (5) seconds until the display reads “AUTO-HOLD ENABLED”.
To return to CONTINUOUS WEIGH mode when finished, press and hold the “HOLD” button for
approximately five (5) seconds until the display reads “CONTINUOUS WEIGH”.
BATTERY REPLACEMENT
STEP 1: The display will read “CHANGE BATTERIES”.
STEP 2: (Figure 5) Place the scale on its side and open the battery compartment cover located in
the bottom of the scale base.
STEP 3: Remove and replace ALL six (6) “C” cell batteries. Refer to diagram on the battery
compartment cover for placement.
STEP 4: Press the “WEIGH” button to confirm display is working.
STEP 5: Tightly close the cover.
STEP 6: Zero the system.
Figure 6: Bottom of Scale Base

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 12 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.
THEORY OF OPERATION
SR Instruments patient weighing systems are digital scales. Strain-gauge force cells convert the force
of an applied weight into an analog signal. This signal is amplified by an operational amplifier and
converted to a digital signal by an analog to digital converter. The digital signal is transferred to a
micro-controller where it is filtered, converted to appropriate units, and displayed on a liquid crystal
display.
Strain-gauge force cells each contain four strain gauges mounted in a full Wheatstone-bridge
configuration. These bridges convert the physical movement of the force cell, due to the applied mass
on the system, into minute changes in electrical resistance. These changes in resistance produce a
voltage difference across the Wheatstone-bridge, which is amplified by the operational amplifier. The
amplifier is configured to current sum the output of each cell, with potentiometers serving to adjust the
sensitivity (voltage out per unit of weight applied) of each bridge. The offset potentiometer produces a
small current, which nulls the output of the amplifier for an unloaded system.
The output of the operational amplifier is digitized by the analog to digital converter. The converter
integrates the analog signal onto the integrating capacitor over a short interval. The integrating
capacitor is then discharged at a rate proportional to the reference voltage applied to the converter.
The residual voltage on the integrating capacitor is then multiplied by a factor and again discharged at
a rate proportional to the reference voltage. The residual voltage from this discharge is again
multiplied by a factor and again discharged. The time taken to discharge the capacitor is proportional
to the voltage from the operational amplifier, which is proportional to the applied load on the force
cells. The time is stored as a binary number in the analog to digital converter and is transferred to the
micro-controller when the conversion is complete.
The micro-controller averages and filters the digital output of the analog to digital converter, subtracts
the value saved during the system zero operation and scales the filtered output, and then displays the
result on the liquid crystal display. The micro-controller performs a rolling average of data for
continuous weigh and, for AutoHold, the micro-controller averages the data before locking in on the
reading. If the data variance is greater than 0.1% in the AutoHold mode, the micro-controller will reset
the filter and start a new averaging period.
The micro-controller can be placed in a calibration mode, where the system can be re-calibrated. In
the calibration mode, the result of the weigh operation is scaled to match the value by adjusting the
“up” and “down” calibration buttons. This new calibration factor is then stored in the non-volatile
memory.

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 13 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.
LOW
LIMIT
APPLIED
LOAD HIGH LIMIT
99.9
100.0
100.1
199.8 200.0 200.2
299.7 300.0 300.3
399.6 400.0 400.4
499.5 500.0 500.5
599.4 600.0 600.6
699.3 700.0 700.7
799.2 800.0 800.8
899.1 900.0 900.9
999.0 1000.0 1001.0
CALIBRATION
TOLERANCE TABLE
CALIBRATION
NOTE: Ensure that nothing is in contact with the scale system during this procedure. Remove
hands from the system when noting the displayed calibration results.
STEP 1: (Figure 7) Remove the two (2) screws on the bottom of the display housing. Lift the
display panel. The calibration buttons are located on the PC Board.
STEP 2: Press and hold both buttons simultaneously.
STEP3: The display will read “HOLD TO CAL” as the right hand digit
counts down to enter the CAL mode.
STEP 4: When in the CAL mode, press the “ZERO” button to zero
the display.
STEP 5: Place a known calibrated weight, traceable to NIST, onto the
weighing surface and compare it to the displayed reading. Note: DO
NOT USE barbell weights or calibrate to a mechanical scale.
STEP 6: Use the “-” or “+” button to make corrections to the
displayed weight. The displayed value should be within 0.1% of the
calibrated weight, plus or minus 1 digit of reading.
STEP 7: When settings are completed: Press
the “HOLD” button to SAVE the settings or
press the “WEIGH” button to CANCEL. Both
choices will EXIT the CAL mode.
Figure 7: Calibration Button Diagram
IMPORTANT
CALIBRATION CHECK Qualified service personnel only should perform this
procedure. The SR555 load cell itself has no user serviceable components and should not
be tampered with for any reason. Re-calibration is generally not required, but should be
verified periodically to ensure accuracy. The recommendation for calibration check is at
least once every 12 months, or as individual maintenance policy requires.
CAUTION
The integrated circuits and semiconductors on
the printed circuit boards may be damaged
by electrostatic discharge (ESD). Be sure to
use proper handling precautions at all times.
“
-
” “+”
CALIBRATION BUTTONS

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 14 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.
INITIALIZATION
STEP 1: (Figure 8) Remove the two (2) screws on the bottom of the display housing. The
initialization buttons are located internally on the PC Board. Refer to PC BOARD LAYOUT
(SW2 and SW5).
STEP 2: Simultaneously press buttons indicated to initialize the system. The display will read,
“HOLD TO INIT”, and count down from 9 to 0. When the initializing is complete, the display
will read, “INITIALIZING” and then return to the WEIGH mode.
STEP 3: Follow the CALIBRATION procedure.
Figure 8: Location of Internal Initialization Buttons
INITIALIZATION PROCEDURE
To be used ONLY IF REPLACING IC5 or if DISPLAY READS DOUBLE
CAUTION
The integrated circuits and semiconductors
on
the printed circuit boards may be damaged
by electrostatic discharge (ESD). Be sure to
use proper handling precautions at all times.
Internal Initialization Buttons
SW2
SW5

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 15 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.
TROUBLESHOOTING
SYMPTOM REASON/CORRECTIVE ACTION
The characters only appear on half of the
display. Press the “WEIGH
” button or remove one battery.
Wait five seconds, then re-install the battery and try
the “WEIGH” button again.
The display lights appear to work, but do
not respond to button activation. Button may not have “bounced” back up after being
pressed. Remove the faceplate and inspect buttons.
Make sure the rubber “boot” is not sitting too high. Re-
attach plate.
The display shows no reading at all. Check to ensure batteries are installed correctly (see
directions for BATTERY REPLACEMENT)
.
Check display cable to make sure it is connected
securely.
For additional information or assistance, telephone our Service Hotline: [phone]
or e-mail: [e-mail]

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 16 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.
WARRANTY
FOUR YEAR LIMITED WARRANTY
Each Ssystem is manufactured with high quality components. SR Instruments, Inc.
warrants that all new equipment will be free from defects in material or workmanship, under
normal use and service, for a period of four (4) years from the date of purchase by the original
purchaser. Normal wear and tear, injury by natural forces, user neglect, and purposeful
destruction are not covered by this warranty. Warranty service must be performed by the factory
or an authorized repair station. Service provided on equipment returned to the factory or
authorized repair station includes labor to replace defective parts. Goods returned must be shipped
with transportation and/or broker charges prepaid. SR Instruments, Inc.’s obligation is limited to
replacement of parts that have been so returned and are disclosed to SR Instruments, Inc.’s
satisfaction to be defective. The provisions of this warranty clause are in lieu of all other
warranties, expressed or implied, and of all other obligations or liabilities on SR Instruments,
Inc.’s part, and it neither assumes nor authorizes any other person to assume for SR Instruments,
Inc. any other liabilities in connection with the sale of said articles. In no event shall SR
Instruments, Inc. be liable for any subsequent or special damages. Any misuse, improper
installation, or tampering, shall void this warranty.
DAMAGED SHIPMENTS
Title passes to purchaser upon delivery to Transportation Company. Any claims for shortage or
damage should be filed with the delivery carrier by purchaser.
RETURN POLICY
All products being returned to SR Instruments, Inc. require a Return Goods Authorization number
(RGA). To receive an RGA, call our Technical Service Team at 716-693-5977 or toll-free in the
USA and Canada at 800-654-6360.
When inquiry is made, please supply model and serial numbers, purchase order, if the scale was
bought on contract, and reason for return.
Generally, deleted, damaged, and outdated merchandise will not be accepted for credit. A
minimum restocking charge of 15% will be assessed on return of current merchandise.
All returns are to be shipped FREIGHT PREPAID to: SR Instruments, Inc., 600 Young Street,
Tonawanda, NY 14150.
RESTOCKING FEE
15% fee for any scale that has been opened and used
10% fee for any scale returned that has been ordered incorrectly or refused delivery with
no model change
5% fee if an error in ordering has been made and a different model exchanged
No fees will be charged if the scale is returned because of an error on the part of SR
Instruments, Inc.
No returns accepted after 60 days.

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 17 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.
NOTES

Model SR555 Stand-On Scale
Operating and Service Manual - S/N 1800+
Part No. MAN555_060829 Page 18 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.
Precision & Technology in
Perfect Balance 