SR Instruments SR Scales SR755i-KG Service manual

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 1 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
S
by SInstruments, Inc.
Operating and Service
Manual
Model SR755i-KG
Wheelchair Scale

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 2 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
TABLE OF CONTENTS
TABLE OF FIGURES......................................................................................................................2
PACKING CHECKLIST –MODEL SR755I-KG ........................................................................3
ASSEMBLY.......................................................................................................................................4
REPLACEMENT PARTS AND ACCESSORIES ........................................................................6
SYSTEM DESCRIPTION AND INTENDED USE.......................................................................6
MICROBAN ANTIMICROBIAL PROTECTION.......................................................................7
MAINTENANCE AND CLEANING..............................................................................................7
STORAGE AND TRANSPORTATION ........................................................................................7
SPECIFICATIONS...........................................................................................................................8
BUTTON FUNCTIONS...................................................................................................................9
BASIC SYSTEM OPERATION....................................................................................................10
BATTERY REPLACEMENT.......................................................................................................11
THEORY OF OPERATION .........................................................................................................12
CALIBRATION..............................................................................................................................13
CONFIGURING SEND BUTTON................................................................................................15
TROUBLESHOOTING.................................................................................................................16
WARRANTY...................................................................................................................................17
TABLE OF FIGURES
Figure 1: Scale Assembly Diagram ...............................................................................................4
Figure 2: Display Cable Connector and Battery Compartment Cover.....................................4
Figure 3: Printer Mast Bracket.....................................................................................................5
Figure 4: Printer Mounting Bracket.............................................................................................5
Figure 5: Button Display.................................................................................................................9
Figure 6: Battery Compartment...................................................................................................11
Figure 7: Calibration Tolerance Table........................................................................................13
Figure 8: Calibration Switch Diagram ........................................................................................13

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 3 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
PACKING CHECKLIST –Model SR755i-KG

DESCRIPTION
QUANTITY
Box 1
BASE ASSEMBLY
1 ea
MAST ASSEMBLY with DISPLAY
1 ea
DISPLAY UNIT WITH CABLE
1 ea
PACKAGE OF SIX (6) “D” CELL BATTERIES
1 ea
3/8-16 FLAT HEAD SCREWS
4 ea
CALIBRATION CERTIFICATE
1 ea
WARRANTY CARD
1 ea
MANUAL
1 ea
Box 2 SR8220 Optional Printer Kit
PRINTER
1 ea
PRINTER BATTERY CHARGER
1 ea
PRINTER CABLE
1 ea
PRINTER MAST BRACKET & HARDWARE
1 ea
PRINTER MOUNTING BRACKET & HARDWARE
1 ea
PRINTER PAPER
1 ea
LOCTITE
1 ea

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 4 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
ASSEMBLY
STEP1 Unpack the scale system and check parts
against the PACKING CHECKLIST. If there are any
missing or damaged parts, please call the Service
Hotline: [phone].
STEP 2: (Figure 1) Position the Mast Assembly (1)
into the Base Assembly (2) as shown, while feeding the
display cable through the cable hole on the right.
STEP3: (Figure 1) Insert the four (4) 3/8-16 screws (4)
into the holes in Mast Assembly and Base Assembly as
indicated. Secure the Mast Assembly by tightening
screws into Base Assembly.
Figure 1: Scale Assembly Diagram
STEP4: Gently rest the scale on its side. Verify that the
serial number on the bottom of the Display Unit (5) matches
that on the Battery Compartment Cover (6); located in the
Base Assembly between the wheels.
Figure 2: Display Cable Connector and Battery Compartment Cover
#
PART NAME
1
Mast Assembly
2
Base Assembly
3
Height Bar Assembly (optional)
4
3/8-16 Screws
5
Display Unit
6
Battery Compartment Cover
7
Display Cable Connector
8
Printer (optional)
9
Printer Mast Bracket (optional)
10
Printer Cable (optional)
5
1
4
3
2
7
6
Cable
Hole
e
Continued next page
8
9
10

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 5 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
ASSEMBLY Cont’d
STEP 5: Attach the Display Cable Connector (7) to its mate in the Base Assembly. Slide the extra
cable back up into the mast pipe.
STEP 7: Install the six (6) “D” cell batteries as indicated on the Battery Compartment Cover
label. Tightly close the cover.
STEP8: Return the scale tothe upright position.
INSTALLING OPTIONAL PRINTER
STEP 1: Mount the Printer Mast Bracket (9) to the rear of the Mast Assembly (1) using the two
(2) mounting screws provided. NOTE: The three holes on the Printer Mast Bracket should be
towards the top of the Mast (figure 3).
STEP 2: Apply a small amount of Loctiteto the three (3) small screws provided and attach
the Printer Mounting Bracket to the Printer Mast Bracket (figure 4).
STEP 3: Attach the Printer to the Printer Mounting Bracket by inserting the tabs on the Printer
Mounting Bracket (figure 4) into the slots on the back of the Printer and carefully snap in place.
STEP 4: Plug the Printer Cable into the Printer and into the Display Unit. Tighten the connector
screws into the Display Unit connector.
Figure 3: Printer Mast Bracket
Figure 4: Printer Mounting Bracket

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 6 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
ASSEMBLY Cont’d
INSTALLING OPTIONAL HEIGHT BAR ASSEMBLY
STEP 1: Remove the round plug from the top left of the Display Unit. Insert the Height Bar
Assembly into the hole in the Display Unit. Ensure the Height Bar Assembly seats correctly in the
Base Assembly (Item 3, Figure 1).
NOTE: It may be necessary to loosen the four (4) 3/8 –16 flat head Mast Base Assembly
mounting screws (Item 4, Figure 1), to allow movement of the Mast for insertion of the Height Bar
Assembly into the Base Assembly.
STEP 2: After Height Bar Assembly installation re-tighten the four (4) 3/8 –16 flat head Mast
Base Assembly mounting screws.
STEP 3: Tighten the two (2) Allen screws into the Display Unit to secure the Height Bar
Assembly to the scale.
REPLACEMENT PARTS and ACCESSORIES
SYSTEM DESCRIPTION and INTENDED USE
SYSTEM DESCRIPTION
The SR755i –KG Wheelchair Scale 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 SR755i-KG to derive its power from six (6)
common “D” cell batteries, which will provide up to 166 hours of 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. The weight data may be viewed
in kilograms with a displayed resolution of 0.1 kg.
Part #
Description
SR8285CM
Height Bar Assembly (optional)
SR8220
Printer Kit (optional; contains all printer parts listed below)
FRAP1300
Printer
FRAP13900BR-01
Printer Mounting Bracket
FRAP1300-D9
Printer Cable
FRAP1300BP01
Rechargeable Battery Pack
FRBC1300
Printer Battery Charger
FRTP130012C
Paper, Thermal Printer 58mm (10 Rolls)
MF8205
Printer Mast Bracket

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 7 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
SYSTEM DESCRIPTION and INTENDED USE cont’d
INTENDED USE
The SR755i-KG Wheelchair Scale is specifically
designed for use as a portable patient weighing system
for ambulatory and non-ambulatory wheelchair bound
patients or those that need to be supported by a chair or
walker. Maximum weight capacity must not exceed
454 kilograms gross weight.
MICROBAN ANTIMICROBIAL PROTECTION
Microban® antimicrobial technology has been added to help reduce the growth of bacteria as part
of a medical center's approach to creating a cleaner healthcare environment. For more information,
visit https://www.microban.com/sr-scales
MAINTENANCE and CLEANING
The display case for the SR755i-KG Wheelchair Scale
is made of a powder-coated aluminum casting.
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.
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 SR755i-KG Wheelchair Scale, lower the Height Bar if installed, tip the scale back
and wheel it to a new location. Lower the platform back down to the floor, being careful not to
shock the scale.
WARNING
DO NOT EXCEED MAXIMUM
WEIGHT LIMIT OF 454 KG
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

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 8 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
SPECIFICATIONS
MAXIMUM WEIGHT CAPACITY
454 kg
PLATFORM SIZE
71 cm x 71 cm
HEIGHT GAUGE (optional)
Telescoping gauge –109 cm to 201 cm
DISPLAY TYPE
16-Character Dot Matrix LCD
DISPLAY RESOLUTION
0.1 kg
ACCURACY
0.1% +/- 1 digit of displayed resolution for calibrated range
AUTO ZERO
One button operation
AUTO POWER DOWN
Approximately 30 seconds (adjustable to 300 seconds)
RECALL
Recalls last stored weight, height, and BMI
AVERAGING
Automatic digital filter
POWER SUPPLY
Six (6) “D” cell batteries
CALIBRATION
Calibration is traceable to NIST standards.
OPERATING CONDITIONS
Normal operating conditions for this product: Ambient
Temperature Range: 68F to 85F (20C to 30C),
Relative Humidity Range: 0% to 85%. Avoid exposure
to high-pressure water or steam.
TRANSPORT and STORAGE
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). Remove batteries if storing longer than three
(3) months.

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 9 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
BUTTON FUNCTIONS
Figure 5: Button Display
ZERO / WEIGH
Press and hold to zero. The display will read “WT = 0.0 kg”. This is used to zero the
system before placing the patient on the scale system. This action also resets previously
stored weight, height and BMI values to zero. Ensure that nothing is in contact with the
weighing surface during this procedure.
Press to weigh. Weight stable indicator “” flashes then remains solid when stable. Auto
stores stable weight in memory.
SEND (PRINTER / EHR)
Press to send stored values to EHR or to printer. Output values include time, date, weight,
height, and BMI. Also, indicated on display when paper is out, “PAPER OUT” and when
door is open, “PAPER DOOR OPEN”.
RECALL
Press to recall the last stable weight. Display will scroll thru “WT”, “HT”, and “BMI”
stored values in approximately two second intervals.
ENTER
Press to save height data and display BMI calculation. Stable weight, height and BMI
values are stored in memory until next stable weight is stored or until system is zeroed.
BMI
Press to calculate the BMI. When the “BMI” is pressed, the default starting value “HT =
165 cm” is displayed. If there is no stored stable weight, the display will indicate “NO
WEIGHT DATA” and then go back to the weigh screen “WT = 0.0 kg”.
Continued next page

Model SR755i-KG Wheelchair Scale
Operating and Service Manual
Part No. MAN755i-KG_MICROBAN_180828 Page 10 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2018 SInstruments, Inc.
BUTTON FUNCTIONS cont’d
MENU Press Menu to edit setup.
Setting ON TIME: Use UP or DOWN arrow buttons to adjust the “ON TIME”. The
“ON TIME” may be set from 30 to 300 seconds in 30 second increments. Press ENTER
to save changes.
Setting TIME and DATE: Use the UP arrow button to select digit. To change digit use
the DOWN arrow button. Press ENTER to save changes.
NOTE: When selected, the year position defaults to “00”
UP Press UP to adjust height up from the default, to increase the scale’s “on time”, or to
select a digit when setting time and date.
DOWN Press DOWN to adjust the height down from the default, to decrease the scale’s “on
time”, or to change the value of a selected digit when setting time and date.
BASIC SYSTEM OPERATION
SETTING SYSTEM ZERO
Make sure the scale is free and clear of any obstructions and press and hold the
ZERO / WEIGH button. The displayed message will indicate “HOLD TO ZERO”and
count down to zero. Make sure that nothing is in contact with the scale while zeroing the
system. In a few seconds, the display will read “WT = 0.0 kg”. This action also resets
previously stored weight, height, and BMI values to zero.
WEIGHING
Position the patient on the scale. Lock the patient’s wheelchair brake to prevent
movement. Press the ZERO/WEIGH button. The weight stable indicator “” flashes
on the display. When the weight is stable, the weight stable indicator remains solid. The
display will indicate the patient’s weight in kilograms; example: “WT = 55.8 kg”. The
stable weight is auto stored in memory.
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.
CAUTION
DO NOT LEAVE PATIENT UNATTENDED ON THE SCALE PLATFORM
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