SR Instruments SR Scales SRV712W-2 Manuale di servizio

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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: 716-693-5977 Fax: 716-693-5854 URL: www.srscales.com

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.

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