SR Instruments SR Scales SRV712W-2 Service manual

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 1 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
S
by SR Instruments, Inc.
Operating and Service
Manual
Marine Scale System
App Enabled Wireless
Model SRV712W-2

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 2 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
TABLE OF CONTENTS
TABLE OF FIGURES......................................................................................................................2
PACKING CHECKLIST - MODEL SRV712W-2........................................................................3
ASSEMBLY.......................................................................................................................................4
REPLACEMENT PARTS AND ACCESSORIES ........................................................................5
SYSTEM DESCRIPTION AND INTENDED USE.......................................................................5
MAINTENANCE AND CLEANING..............................................................................................5
STORAGE AND TRANSPORTATION ........................................................................................6
SPECIFICATIONS...........................................................................................................................7
BUTTON FUNCTIONS...................................................................................................................8
BASIC SYSTEM OPERATION......................................................................................................9
BATTERY REPLACEMENT.........................................................................................................9
THEORY OF OPERATION .........................................................................................................10
CALIBRATION..............................................................................................................................11
TROUBLESHOOTING.................................................................................................................12
WARRANTY...................................................................................................................................13
TABLE OF FIGURES
Figure 1: Battery Compartment....................................................................................................4
Figure 2: LB\KG Mode Pushbutton Switch..................................................................................8
Figure 3: Button Functions.............................................................................................................8
Figure 4: Battery Replacement.......................................................................................................9
Figure 5: Calibration Buttons.......................................................................................................11

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 3 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
PACKING CHECKLIST - Model SRV712W-2
Marine Platform Scale

DESCRIPTION
QUANTITY
PLATFORM SCALE
1 ea
PACK OF SIX (6) “AA” BATTERIES
1 ea
CALIBRATION CERTIFICATE
1 ea
WARRANTY CARD
1 ea
TABLET AND CASE
1 ea
MANUAL
1 ea

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 4 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
ASSEMBLY
STEP1: Unpack the Marine Scale Platform (1) 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: Place the Platform upside-down on the floor and remove the cover on the Battery
Compartment (Figure 1). Install six (6) “AA” cell batteries according to BATTERY
REPLACEMENT instructions.
STEP 3: Turn platform right side-up and press the “DISPLAY” button to confirm display is working.
Figure 1: Battery Compartment
Battery
Compartment

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 5 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
REPLACEMENT PARTS and ACCESSORIES
SYSTEM DESCRIPTION and INTENDED USE
SYSTEM DESCRIPTION
The SRV712W-2 Marine Platform Scale employs the latest in microprocessor and load cell
technology to provide accurate and repeatable weight data. Four (4) identically matched Stainless
Steel Load Cells are environmentally sealed and strategically placed to ensure an accurate
representation of the subject’s weight.
The SRV712W-2 Marine Platform Scale derives its power from six (6) each “AA” batteries.
With the push of a button, weight is displayed with a displayed resolution of 0.2 pounds or 0.1
kilograms.
The SRV712W-2 Marine Platform Scale is equipped with a Bluetooth wireless module. By
waking the scale up with the “weigh” button the wireless feature is turned on. Then use the free
SR Scales app (Google Play store) to connect with the scale to allow for remote wireless
operation.
INTENDED USE
The SRV712W-2 Marine Platform Scale is designed for use with marine mammals. It is a
preferred means of gathering weight data up to 2000 pounds or 907 kilograms.
Part #
Description
FK5210039
RUBBER LEVELING FOOT
MAN712W-2
MANUAL
WARNING
DO NOT EXCEED
MAXIMUM WEIGHT LIMIT OF
2000 LB / 907 KG

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 6 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
MAINTENANCE and CLEANING
The SRV712W-2 readout is built into the
scale platform. Exercise caution when
cleaning the display window as it is made
of clear acrylic and can be scratched by
abrasive cleaners. The waterproof seal
can also be damaged. We recommend
mild soap and water for general cleaning
and disinfecting.
STORAGE and TRANSPORTATION
STORAGE
If storing this equipment for periods longer than three (3) months, remove the battery. To
maintain proper operation of the 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).
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 SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 7 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
SPECIFICATIONS
MAXIMUM WEIGHT
CAPACITY
2000 lb / 907 kg (Minimum 10 lb)
PLATFORM SIZE
26 in x 44 in x 2 ¾ in
66 cm x 112 cm x 7 cm
DISPLAY TYPE
LCD
DISPLAY RESOLUTION
0.2 lb / 0.1 kg
ACCURACY
0.2% +/- 1 digits of displayed resolution for calibrated
range
AUTO ZERO
One button operation
STABILIZATION TIME
Five (5) seconds
AUTO POWER DOWN
After five (5) minutes (idle)
BLUETOOTH ON-TIME
5 minutes from last button press
AVERAGING
Automatic digital filter
POWER SUPPLY
Six (6) AA batteries
CALIBRATION
Calibration is traceable to NIST standards
OPERATING CONDITIONS
Normal operating conditions for this product: Ambient
Temperature Range: 40F to 95F (5C to 35C) Relative
Humidity Range: 0% to 85%.
Avoid exposure to high-pressure water or steam.
TRANSPORTATION 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 SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 8 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
BUTTON FUNCTIONS
The “DISPLAY” button is used to turn the system on and display the subject’s weight.
The “DISPLAY” button is also used to zero the system by pressing and holding the “DISPLAY”
button for 2-3 seconds.
LB/KG MODE
The “LB/KG MODE” Toggle Button (Figure 2)
allows weight data to be viewed in either pounds or
kilograms, displayed in a resolution of 0.2 pounds or
0.1 kilograms.
The “LB/KG MODE” Pushbutton is located on the
display box on the underside of the scale. Select the
mode for weighing with this Toggle Button.
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 SRV712W-2 scale functions (Figure
3).
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 3: Button Functions
Figure 2: LB\KG Mode Pushbutton Switch
“LB/KG MODE”
Pushbutton
Switch

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 9 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 SInstruments, Inc.
BASIC SYSTEM OPERATION
Ensure that the scale is free and clear of any obstructions before operating.
Press the “DISPLAY” button and hold it for 2-3 seconds. The display will read “0.0” and be
ready for weighing.
When a mat or pad is to be used on the scale platform, the weight of the pad must be tared out.
Place the mat on the platform, then press and hold the “DISPLAY” button for 2-3 seconds. The
display will read “0.0”.
Note: The display will automatically shut down after five minutes. The zero (TARE)
will be stored in memory.
Assist the animal on the scale platform; its weight will appear on the display.
Note: The display will automatically shut down after five minutes. Press the
“DISPLAY” button to restart.
It is recommended that the system be zeroed prior to each subject being weighed.
BATTERY REPLACEMENT
Figure 4: Battery Replacement
REPLACING BATTERIES
When battery replacement is needed, an indicator will appear on the display.
STEP 1: Turn the platform over and remove the four screws on the Battery Cover.
STEP 2: Remove and replace the six (6) “AA” cell batteries. Replace the screws in the Battery
Cover.
NOTE: TIGHTEN SCREWS ONLY UNTIL RUBBER SEAL STARTS TO COMPRESS
STEP 3: Press the “DISPLAY” button to confirm displayis working.
STEP 4: Position the scale back into weighing position.
STEP 5: Zero the system. Scale is ready for use.
Battery Cover

Model SRV712W-2 Marine Scale System
Service Manual
Part No. MAN712W-2_170816 Page 10 of 14
SInstruments, Inc., 600 Young Street, Tonawanda, NY 14150
Tel: [phone] Fax: [phone] URL: www.srscales.com
email: [email protected]m Copyright 2017 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 Whetstone-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 output of the operational amplifier is digitized by the analog to digital converter.
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.