SR Scales SR520 Owner's Manual

MAN520 Rev. 021126

S

by SR Instruments, Inc.

Model SR520

Stand-On Scale System

OWNERS MANUAL

SR Instruments, Inc. 600 Young Street, Tonawanda, NY, 14150
Tel: [phone] Fax: [phone]

S

SR Precision Scale Systems

Table of Contents

SECTION I

Rev. 021126

OPERATION and MAINTENANCE

System Description and Specifications Page 1

System Operation Page 2

Button Functions Page 2

Special Features Page 3

SECTION II

TECHNICAL SERVICE INFORMATION

Calibration and Maintenance Page 4

Cleaning Page 5

Schematic Diagram Page 6

Assembly Instructions Page 7

Rev. 021126

S

MODEL SR520

STAND-ONSCALE SYSTEM

The SR520 is a Precision Digital Scale System specifically designed for use as a
Stand-On scale for weighing ambulatory patient. The SR520 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 regardless of
weight distribution.

The scale system derives it's power from 6 "D" cell alkaline batteries. The low
power microprocessor circuitry allows the SR520 to derive it's power from six (6)
"D" cell alkaline batteries which will provide aprox.10,000 weight reading before
needing replacement. This eliminates the need for an external battery charger and
the danger of an A.C. cord.

The Patient's weight is displayed on a 16 character dot matrix liquid crystal
display in KILOGRAMS with a displayed resolution of 0.1 Kg.

SPECIFICATIONS

MAX Capacity 450 Kg's

Display Resolution 0.1 Kg's

Accuracy 0.1% +/- 1 digit of reading

for calibrated range

Zero One Button Automatic

Hold Freezes Displayed Weight

and Stores data in Memory.

Last Weight Recall Hold Button Recalls

Last Stored Weight.
Display Type 16 character dot matrix L..C.D.
Display Time Auto power-down 60 sec.

Damping Automatic digital filter

Power Supply 6 "C" Cell Alkaline Batteries

Warranty Two Years Parts and Labor

page 1

Rev. 021126

0

0

SR520 SYSTEM OPERATION S

BASIC OPERATION

Before the patient is positioned on to the scale system you must first set the system zero. This

is done as follows;

1. Press the "O" button. The displayed message will indicate " HANDS OFF ". Make

ZERO

The patient may now step on to the weighing sutface to veiw the weight data.

sure that nothing is in contact with the scale system while zeroing. In a few seconds
the display will indicate " WEIGHT = 0.0 KG ".

Note: When the unit is first turned on the mode will default to the last mode used.

BUTTON FUNCTIONS :

The "0" button is used to initialize the system zero before placing a patient on to the

ZERO

WEIGH

HOLD

scale system. When the "0" button is pressed, the display message will indicate
"HANDS OFF". At this point you should make sure that nothing is in contact with the

weighing surface so that the system zero will be accurate. In a few moments the
display wll read - "WEIGHT = 0.0 KG".

The display mode will automatically default to the last mode used

If after positioning the patient on to the scale system, the display shuts off before
you are able to view the weight data, simply press the "WEIGH" button to WAKE the
display and view the patient's weight.

NOTE: It is reccommended that you ZERO the system before each weighing to
assure accuracy.

The "HOLD" button will freeze the displayed patient weight and store it away in
memory. To recall the LAST WEIGHT after the system has shut off, press the
"HOLD" button BEFORE pressing any other. The system only recalls the LAST
WEIGHT that was stored by HOLD.

LB

KG

MODE

Button is inactive.

page 2

S