Rice Lake 550-10 Operating instructions

155191 - Rev A
Rice Lake Digital Chair Scale
Model 550-10
Software Revision 11454
Technical & Operating
Instructions

Contents
1.0 Introduction.................................................................................................................................. 1
2.0 Cautions and Warnings................................................................................................................ 2
3.0 Scale Assembly ........................................................................................................................... 3
3.1 Unpacking Your Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Save Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.3 Setting Up Your Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4.0 Scale Operation ........................................................................................................................... 9
4.1 Weighing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Hold/Release Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3 Preset Tare. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Toggle Tare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5 Using the Body Mass Index (BMI) Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.0 Scale Configuration ................................................................................................................... 12
5.1 Programming Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Default Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Scale Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.0 Test Menu................................................................................................................................... 18
7.0 RS-232 Communication............................................................................................................. 19
7.1 Pushbutton Keypad Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Communication Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2.1 Escape Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2.2 Maintenance Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3 USB Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8.0 Troubleshooting and Testing ..................................................................................................... 25
9.0 Maintenance .............................................................................................................................. 25
9.1 Basic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.0 Rice Lake Chair Scale Specifications....................................................................................... 26
For More Information ............................................................................................................................. 27
Rice Lake Digital Chair Scale Limited Warranty................................................................................... 28
Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com/training
or obtained by calling 715-234-9171 and asking for the training department.
©2013 Rice Lake Weighing Systems. All rights reserved. Specifications subject to change without notice.
Printed in the United States of America. Software revision 114154
September 2013

2550 Chair Scale Technical & Operating Instructions
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.

1
1.0 Introduction
The Rice Lake 550 Digital Chair Scale is efficiently designed to provide accurate, reliable and repeatable weight
measurements and has features that enable a fast and convenient weighing process. The Rice Lake 550 Digital
Chair Scale features an ergonomic design, has two armrests that can be lifted separately and a foot rest that can
be folded. Its four swivel casters can be locked in place.
Internet
This manual can be viewed and downloaded from the Rice Lake Weighing Systems web site at
www.ricelake.com/health. Technical information on these products and other medical products
are available on the Rice Lake Weighing Systems web site. Rice Lake Weighing Systems is an
ISO 9001 registered company.
Figure 1-1. Rice Lake 550 Digital Chair Scale

2Rice Lake 550 Digital Chair Scale Technical & Operation Instructions
2.0 Cautions and Warnings
With the Rice Lake 550 Digital Chair Scale there are certain precautions that should be taken to prevent personal
injury to the user and damage to your scale.
Please follow these instructions carefully;
Caution
• Do not transport the scale while the platform is loaded.
• Always lock the caster brakes of the chair before seating the patient.
• Make sure the footrest is in the up position when seating the patient.
• Do not drop the scale or subject it to violent shocks.
• For accurate weighing, the scale must be placed on a flat, stable surface.
• For accurate weighing, verify proper operation according to the procedure described in this manual
before each use.
• Weight exceeding the maximum capacity (660 Lb/300 Kg) may damage your scale.
• Do not use in the presence of flammable materials.
• Operating at other voltages and frequencies than specified could damage the equipment. Use only
medically approved AC adapters.
• If the “LO Bat” indicator activates, for accurate weighing, replace the batteries or connect the scale to an
AC power source as soon as possible.
• These scales are used to determine weight of people while sitting.
• To avoid cross contamination, the scale plate must be cleaned regularly. It is recommended after each
weighing which could result in potential contamination such as when there is direct skin contact during
the weighing process.
• The scale is not waterproof so avoid contact with excessive moisture.

Rice Lake 550 Digital Chair Scale - Scale Assembly 3
3.0 Scale Assembly
3.1 Unpacking Your Scale
Place the unopened box in an open area that has ample room for unpacking the scale.
Parts contained in the shipping box include:
• The chair scale
• This manual
• Box labeled Parts Inside
•TheParts Inside box contains the following:
• Serial communication cable
• 6 AA batteries
• 5 mm Allen key
• 4 M6 x 16 Allen screws (to attach seat to base)
3.2 Save Packaging
If the Rice Lake 550 Digital Chair Scale must be returned for any reason, it must be properly packed with
sufficient packing materials in the original carton.
Note
Damage caused by improper packaging is not covered by the warranty.
3.3 Setting Up Your Scale
Use the following steps to set up the Rice Lake 550 Digital Chair Scale.
Move the box into an area where the scale can be assembled. It’s recommended that the scale be placed on a hard,
level surface for the most accurate weighments.
1. Locate the operator’s manual from inside the box and set it aside as it will provide instructions on the
proper scale removal and set up.
Figure 3-1. Chair Scale Packaging Once Out of the Box
2. Locate and remove the “Parts Inside” box and locate the 5 mm Allen key.

4Rice Lake 550 Digital Chair Scale Technical & Operation Instructions
3. Remove top styrofoam and remove the seat from the attached styrofoam.
Figure 3-2. Remove Seat From Packaging
4. Set the seat aside for later assembly.
5. Remove the side styrofoam and the back handle styrofoam.
Figure 3-3. Remove Side Styrofoam From Packaging
6. Take out the scale from remainder of packaging material.
Note: The chair is heavy so use assistance in taking it out of the box and placing it on the floor, making sure it does not
get dropped.
Figure 3-4. Chair Scale Without Packaging Materials
7. Collect the styrofoam pieces and place them back in the carton box.

Rice Lake 550 Digital Chair Scale - Scale Assembly 5
Chair Assembly
Use the following steps to assemble the chair.
1. Use the Allen key provided in the “Parts Inside” box.
2. Release both of the screws holding the back handle frame (which is marked with circles in Figure 3-5).
Remove screws to
release the back handle
frame
Figure 3-5. Remove Screws to Release the Back Handle Frame
3. Pull out the back handle frame and rotate it so that the indicator will be facing up.
Figure 3-6. Pull out Frame and Rotate
4. Insert the back frame and secure it with the screws.
Tighten screws once
frame has been rotated
Figure 3-7. Tighten Screws Once Frame Has Been Rotated and Reinserted
5. Connect the load cell cable and indicator cable making sure to position the load cell cable on the grooves

6Rice Lake 550 Digital Chair Scale Technical & Operation Instructions
so that it doesn’t get damaged or pinched.
Figure 3-8. Connect Load Cell Cable and Indicator Cable
6. Use the Allen key (provided) to release both screws holding the arm rest frame (marked with circles
below).
Figure 3-9. Loosen Screws Holding Arm Rest Frame
7. Rotate the arm rest until the arm rests are parallel to the seat base.
8. Tighten the screws to secure the arm rests in place.
Note: The arm rests can move up and down to allow easy patient access.
Figure 3-10. Arm Rest Assembly