SR Instruments SRScales SRV947R-BT Service manual

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 1 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
SRV947R-BT
REMOTE DISPLAY
PLATFORM SCALE
APP ENABLED WIRELESS
S
by SR Instruments, Inc.
Operating and Service
Manual

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 2 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
TABLE OF CONTENTS
TABLE OF FIGURES......................................................................................................................2
PACKING CHECKLIST –MODEL SRV947R-BT.....................................................................3
ASSEMBLY.......................................................................................................................................3
SYSTEM DESCRIPTION AND INTENDED USE.......................................................................4
STORAGE AND TRANSPORTATION ........................................................................................4
CLEANING AND DISINFECTING...............................................................................................5
SPECIFICATIONS...........................................................................................................................6
BUTTON FUNCTIONS...................................................................................................................7
BASIC SYSTEM OPERATION......................................................................................................8
SR SCALES APP..............................................................................................................................9
THEORY OF OPERATION .........................................................................................................10
CALIBRATION..............................................................................................................................11
TROUBLESHOOTING.................................................................................................................15
NOTES.............................................................................................................................................16
DISPLAY MOUNTING TEMPLATE..........................................................................................17
TABLE OF FIGURES
Figure 1: SRV947R-BT Button Label...........................................................................................7
Figure 2: Button Functions.............................................................................................................9
Figure 3: Calibration Button ........................................................................................................11
Figure 4: Select and Toggle Button..............................................................................................11

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 3 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
PACKING CHECKLIST –Model SRV947R-BT
Remote Display Platform Scale
ASSEMBLY
STEP 1: Unpack the scale system and check parts against the PACKING CHECKLIST. If
there are any missing or damaged parts, call the Service Hotline at: 1-800-654-6360.
STEP 2: Determine installation location for scale and display, keeping in mind the display cable
length is six (6) feet and the display power cord length is four (4) feet. The display may lay flat on
a desk or end table. If desired, provisions for wall mount have been incorporated, and can be
accomplished in the manner described below.
A. The display should be installed by qualified personnel. The mounting hardware provided
will cover most wall applications.
B. Determine a position on the wall comfortable to the user. Mark the location of the two (2)
mounting holes on the wall (holes are spaced 2.5” on center apart) using the template
provided on page 16.
C. Drill the two (2) pilot holes, no larger than ¼” diameter in the locations marked. Install the
two (2) self-drilling screw anchors.
D. Install the two (2) #8 x 1” flat head screws supplied, leaving approximately ¼” projecting
from the wall.
STEP 3: Connect signal cable to the underside of the platform.
STEP 4: Place SRV947R-BT scale system on a flat, hard floor surface. Ensure all six feet of the
scale are in contact with the floor and scale does not rock.
NOTE: Scale should not be placed on carpet or uneven floor surfaces as this may interfere with
scale accuracy.
STEP 5: Connect the display cable to the scale, then connect the power cable to the display and
plug power adapter into wall.

DESCRIPTION
QUANTITY
SCALE BASE
1 ea.
SCALE DISPLAY
1 ea.
MOUNTING HARDWARE
1 ea.
AC WALL POWER SUPPLY (MEDICAL GRADE)
1 ea.
CERTIFICATE OF CALIBRATION
1 ea.
MANUAL
1 ea.

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 4 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
SYSTEM DESCRIPTION AND INTENDED USE
SYSTEM DESCRIPTION
The SRV947R-BT Portable Platform Scale is a low profile design, 2 in. height, which allows the
animal easy step access. The SRV947R-BT Scale can be used in a fixed location or as a portable
scale. The Scale employs the latest in microprocessor and load cell technology to provide accurate
and repeatable weight data. Six (6) identically matched transducers are strategically placed to
ensure an accurate representation of the patient’s weight.
The patient’s weight is displayed on an LCD screen. With a push of a button, weight data may be
viewed in either pounds or kilograms.
INTENDED USE
The SRV947R-BT Portable Platform Scale is a lightweight portable scale designed for use as a
weighing system for animals not exceeding 400 pounds or 182 kilograms, gross weight. Please
read the following warnings to avoid injury to the animal or attendant.
STORAGE and TRANSPORTATION
STORAGE
If storing this equipment for periods longer than three (3) months, remove the batteries. To
maintain proper operation of this instrument, 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
The SRV947R-BT Portable Platform Scale has four (4) recessed handles on the underside of the
scale for easy portability.
WARNING
DO NOT USE FOR ANIMAL TRANSPORT
DO NOT EXCEED MAXIMUM LIMIT OF 400 LBS / 182 KG

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 5 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
CLEANING and DISINFECTING
CLEANING
To clean the display / user interface and other scale contact areas:
Use a soft cloth dampened with water and mild detergent to clean scale surfaces.
Wipe surface with clean soft cloth dampened with water and then dry with clean soft cloth.
Do not use abrasive materials to clean scale surface to prevent damage to the surface
finish.
Do not spray liquid directly onto scale surfaces. Use only a damp cloth.
DISINFECTION
To disinfect the display / user interface and other scale contact areas:
Use a soft cloth dampened with disinfectant or a damp disposable disinfectant cloth. Cloth
cannot be dripping wet. Follow manufacturer’s instruction on the proper use of
commercially available disinfectants.
Disinfectant solutions with 1% sodium hypochlorite or 70% isopropyl alcohol are suitable
for display / user interface and other scale contact surfaces.
After disinfecting, use a soft cloth dampened with clean water and dry with a soft clean
cloth to prevent buildup of material on scale finish.
Do not use abrasive material to disinfect / clean scale surfaces to prevent damage to the
surface finish.
Do not spray liquid directly onto scale surfaces. Use only a damp cloth.
WARNING: DO NOT SPRAY CLEANING SOLUTION OR LIQUIDS DIRECTLY
ON SURFACES TO BE CLEANED.
WARNING: EXPOSURE TO EXCESSIVE LIQUID WILL DAMAGE USER
INTERFACE KEYPAD.
WARNING: DO NOT USE PRESSURIZED WATER OR STEAM. THE SCALE
SYSTEM CONTAINS ELECTRONIC COMPONENTS THAT MAY BE
ADVERSELY AFFECTED BY EXPOSURE TO SUCH AN
ENVIRONMENT.

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 6 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
SPECIFICATIONS
MAXIMUM WEIGHT CAPACITY
400 lb / 182 kg
PLATFORM SIZE
24 in x 48 in x 2 in
(61 cm x 122 cm x 5 cm)
DISPLAY TYPE
1.0”LCD display with 5 active digits
DISPLAY RESOLUTION
0.2 lb / 0.1 kg
ACCURACY
0.2% +/- 2 digits of displayed resolution for calibrated
range
AUTO ZERO
One button operation
AUTO WEIGH
Scale will automatically turn on and lock in on a stable
weight.
AVERAGING
Automatic digital filter
POWER SUPPLY
AC Wall Power Supply (Medical Grade)
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%-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 to122F (-10C
to +50C). Remove batteries if storing longer than
three (3) months.
BLUETOOTH REQUIREMENTS
Refer to the SR Scales App on the Google Play store
for further information. Minimum requirements for an
OS level of android device are listed at the Google play
store

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 7 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
MODE
ZERO
HOLD/
RECAL
L
BUTTON FUNCTIONS
Figure 1: SRV947R-BT Button Label
The “ZERO/WEIGH” button is used to clear the Recall memory and start a new
weighing cycle. Press and hold for 3 seconds to zero the display.
The “MODE” button is used to select pounds or kilograms.
The “HOLD/RECALL” button is used to “lock in” the weight currently displayed,
or to recall the last saved weight, if nothing is on the scale platform.

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 8 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
o
BASIC SYSTEM OPERATION
TURNING SYSTEM ON
Make sure the scale is free and clear of any obstructions and all six feet are touching a level
surface. Press the “ZERO” button and hold for 3 seconds. The display will read “ZERO” then
display “0.0” when system is ready for weighing.
UNIT
Press the “MODE” button to toggle between pounds or kilograms. The system will remain in the
same mode as last used unless manually changed.
WEIGH
The “WEIGH” button is used to clear the “Recall” memory and start a new weighing cycle.
HOLD/RECALL
The “HOLD/RECALL” button is used to “lock in” and store the weight currently displayed in
system memory. With no weight on the platform pressing the button again will recall the last
stored weight and display it for 15 seconds.
AUTOHOLD
With autohold enabled, when the system detects a stable weight, that value will be stored in
system memory. This value can later be recalled by pressing the “HOLD/RECALL” button with
no weight on the platform.
SCREEN DISPLAYED SYMBOLS
Scale is zeroed and stabilized
MEM Weight is locked in memory (next stable weight will override memory).
Applied weight load has stabilized

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 9 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 SInstruments, Inc.
SR SCALES APP
Use the free SR Scales app (Google Play store) to connect with the scale from any Android device
to allow for remote wireless operation.
Use your Android device to display weight and control the SRV947R-BT scale functions
(Figure 2). Ensure your remote display indicates “CONNECTED” before use.
The “WEIGH” button will display weight in pounds or kilograms as selected.
The “Held Wt” button allows access to the last stable weight that was achieved.
The “ZERO” button is used to zero the system.
The “KILOS” button allows weight data to be viewed in kilograms, displayed in a resolution of
0.1 kilograms.
The “POUNDS” button allows weight data to be viewed in pounds, displayed in a resolution of
0.2 pounds.
Figure 2: Button Functions

Model SRV947R-BT 24 X 48 Remote Display Platform
Operating and Service Manual
Part No. MAN947R-BT_210610 Page 10 of 18
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected] Copyright 2021 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 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 Whetstone-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 Whetstone-bridge, which is amplified by the operational amplifier.
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, then displays the result
on the liquid crystal display. The micro-controller performs a rolling average of data for continuous
weigh and averages the data before locking in on the reading.