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Rice Lake Wheelchair Scale
RL350 Series
Software Revision 11439
Technical Manual
163357 Rev A
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Contents
Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com or obtained
by calling 715-234-9171 and asking for the training department
1.0 Introduction.................................................................................................................................. 1
2.0 Safety ........................................................................................................................................... 2
2.1 Safety Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3.0 Scale Setup.................................................................................................................................. 3
3.1 Unpacking Your Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Repacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.3 Setting Up Your Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.4 Scale Feet Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.5 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.0 Indicator Setup ............................................................................................................................ 6
4.1 Load Cell Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Inserting Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 AC Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.0 Scale Operation ........................................................................................................................... 9
5.1 Weighing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Hold/Release Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3 Preset Tare. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4 Toggle Tare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.5 Using the Body Mass Index (BMI) Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.0 Scale Configuration ................................................................................................................... 12
6.1 Programming Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2 Default Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Scale Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.0 Test Menu................................................................................................................................... 18
8.0 RS-232 Communication............................................................................................................. 19
8.1 Pushbutton Keypad Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.2 Communication Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.2.1 Escape Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.2.2 Maintenance Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8.3 USB Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.0 Maintenance .............................................................................................................................. 25
9.1 Transporting & Storing the Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.0 Troubleshooting and Testing ..................................................................................................... 26
11.0 Scale Specifications.................................................................................................................. 27
11.1 Indicator Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
For More Information ............................................................................................................................. 28
Rice Lake Wheelchair Scale Limited Warranty .................................................................................... 29
© 2014 Rice Lake Weighing Systems. All rights reserved. Specifications subject to change without notice.
Rice Lake Weighing Systems is an ISO 9001 registered company.
Software revision 11439, September 2014 Rev A
i
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Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.
ii Rice Lake Wheelchair Scale Technical Manual
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1.0 Introduction
The Rice Lake Wheelchair Scale is a heavy-duty scale that easily accommodates wheelchairs with its large
platform size and easy-access ramp in either a single ramp (RL-350-5) or dual ramp model (RL-350-6). It
provides exceptional performance in applications where typical wheelchair scales are not large enough to meet
the needs of the patient.
The Rice Lake Wheelchair Scale is a fully e
.86 m), and has a capacity up to 1000 lb (450 kg). The Rice Lake Wheelchair uses four corner-mounted, alloy
steel shear beam load cells, with the cells recessed into the frame channels for protection. The Rice Lake
Wheelchair Scale offers two integrated handles and wheels for ease of portability.
Load cell cables are run through the main channels, and held down with
eliminating the possibility of cable damage in portable applications.
The adjustable feet are used to allow leveling the scale to make up
feet sit inside the foot keeper plates located on the front of the ramp.
The Rice Lake Wheelchair Scale comes equipped with a anti-slip rubber
1" LCD indicator display. The indicator comes with six AA batteries and has an optional AC adapter available.
This manual can be viewed and downloaded from the Rice Lake Weighing Systems web site at
www.ricelakehealth.com. Technical information on this product and other medical products are also
available on the Rice Lake W
lectronic, low profile floor scale that measures 34 in x 34 in (.86 m x
replaceable cable ties near each corner,
for minor floor irregularities. Two of the four
surface on the scale platform and a large
eighing Systems website.
Figure 1-1. Rice Lake Wheelchair Scale (350-10-5 Model Shown)
The scale is set up to use motion sensing technology, to determine actual weight of a moving patient. The weight
can be displayed in either pounds or kilograms and you can enter a tare weight. The Scale Operation section on
page 9 of this manual explains the scale operation and how
1
to obtain a tare weight.
Rice Lake Wheelchair Scale Technical Manual 1
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2.0 Safety
Important
CAUTION
WARNING
WARNING
There are certain precautions that should be taken to prevent personal injury to the user and damage to your
scale.
2.1 Safety Signals
Safety Signal Definitions:
Indicates a potentially hazardous situation that, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situati
moderate injury.
Indicates information about procedures that, if not observed, could result in damage to
equipment
.
on that, if not avoided, may result in minor or
2.2 Safety Precautions
Do not operate or work on this equipment unless you have read and understand
instructions in the manual. Failure to follow the instructions
result in injury or death. Contact any Rice Lake Weighing Systems dealer for replacement
manuals. Proper care is your responsibility.
Before attempting to operate this unit, make sure every individual who operates or works
with this unit has read and understands the following safety information. Please follow these
structions carefully.
in
• Do not drop the scale or subject it to violent shocks.
• For accurate weighing, the scale must be placed on a flat, stable surface.
• Do not transport the scale while someone is standing on it.
• Weight exceeding the maximum capacity (1000 lb/450 kg) ma
• Operating at voltages and frequencies other tha
• If the
LO Bat indicator activates, for accurate weighing, replace the batteries or connect the scale to an AC
n specified could damage the equipment.
power source as soon as possible.
• To avoid cross contamination, the sca
le should be cleaned regularly.
• Avoid contact with excessive moisture.
• Do not allow minors (children) or inexpe
rienced persons to operate this scale.
• Do not jump up and down on the scale.
• Do not use in the presence of flammable materials.
• Do not make alterations or modifications
to the scale.
• People with disabilities, or who are physically frail, should alwa
using this scale.
• Do not use the scale on slippery surfaces, such as a wet floor.
• Do not use this scale when your body/feet
are wet, such as after taking a bath.
or heed the warnings could
y damage your scale.
ys be assisted by another person when
2 Rice Lake Wheelchair Scale Technical Manual
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3.0 Scale Setup
Note
The following sections describe the correct installation procedures when installing the Rice Lake Wheelchair
Scale.
3.1 Unpacking Your Scale
The Rice Lake Wheelchair Scale comes shipped in a wooden two piece box. Place the unopened box in an open
area that has ample room for unpacking the scale.
Recommended tools needed to set up your sc
• Scissors or box cutters
• Small Phillips screwdriver
Using scissors or a box cutter, cut the
Immediately after opening the box, visually inspect your scale to ensure all parts are included and undamaged.
Parts contained in the shipping box include:
• Rice Lake Wheelchair Scale
• This manual
• Parts box which contains the indicator display
strapping bands that secure the box together. Lift off the top cover.
3.2 Repacking
If the Rice Lake Wheelchair Scale must be returned for modification, calibration or repair, it must be properly
packed with sufficient packing materials. Whenever possible, use the original box when shipping the wheelchair
scale back.
Damage caused by improper packaging
ale include:
is not covered by the warranty.
3.3 Setting Up Your Scale
Use the following steps to set up the Rice Lake Wheelchair Scale.
1. Locate the operation manual and set aside as it will provide instr
2. Using two people, remove the scale off of the shipping pl
Figure 3-1. Un-box the Scale
3. Move the scale into the area where the weighing process will occur. It’s recommended to place the scale
on a hard, level surface for the most accurate weighments. Thin carpeting is often acceptable but not
recommended.
atform that it came in as shown in Figure 3-1.
uctions on the proper scale setup.
Rice Lake Wheelchair Scale Technical Manual - Scale Setup 3
Page 8
4. Stand the scale on its side so that the plastic packaging material can be removed.
Figure 3-2. Remove Plastic Wrapping off of Scale
3.4 Scale Feet Adjustment
The scale feet are shipped attached to the scale. Adjustments need to be made in order for the scale to sit properly
on the floor.
1. There must be adequate clearance between the sc
clockwise two full turns. This will ensure that there is enough clearance between the scale base and the
floor.
ale base and the floor so screw each foot out counter
Figure 3-3. Backing Out the Scale Feet
4 Rice Lake Wheelchair Scale Technical Manual
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2. Carefully unwrap the load cell cable located on the underside of the scale. It will run out the underside of
Note
Note
Note
Cable should
exit underside
of the scale on
the wheeled
side of scale.
the scale.
Figure 3-4. Unwrap the Cable from the Underside of the Scale
3. Gently set the scale base down to the floor. There should be minimal clearance between the scale base
and the floor without having the scale base actually touching the floor.
Not having clearance around the scale base will create inaccurate weighments.
4. It’s also important to make sure that the scale is completely level. Gently press down on all corners of the
scale base to ensure that there are no high spots or rocking of the scale base.
An un-level base will produce inaccurate weight readings.
3.5 Cable Connections
Ten feet of 4-wire cable to connect the scale to the weight indicator is supplied with each scale.
The cable is pre-installed from the factory.
The cable must be routed to the indicator in a manner that will protect the cable from damage. Cabling should
exit the underside of the scale on the portable wheel side of the scale and not the ramp side(s). When planning
cable routing, leave a loose coil of excess cable under the scale to facilitate future lifting of the scale for servicing
or cleaning.
Figure 3-5. Indicator Cable Exiting the Side of the Scale Platform
5. When the interface cable is protected and in its final position, complete connections to the indicator as
described in Section 4.0.
Rice Lake Wheelchair Scale Technical Manual - Scale Setup 5
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4.0 Indicator Setup
Unscrew tilt stand knobs
and remove tilt stand from
indicator
To protect the indicator during transit, the indicator is shipped in a separate box inside the main shipping
container. The following sections apply to indicator connections and setup.
4.1 Load Cell Connections
The scale comes with ten feet of load cell cable which comes from the bottom of the scale (shown in Figure 3-5).
The load cell cable must be connected
To gain access to the load cell connection point, do the
1. Unscrew and remove the tilt stand bracket
to the indicator display.
following:
from the indicator.
2. Remove the four back retaining screws as shown in Figure 4-2 and remove the back cover to the
indicator.
Figure 4-1. Remove Tilt Stand From Indicator
Figure 4-2. Remove Back Cover of Indicator
6 Rice Lake Wheelchair Scale Technical Manual
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3. Figure 4-3 illustrates where the load cell connection point is located.
Load Cell
Connection
Point
Note
Figure 4-3. Load Cell Connection Point
Plug the end of the load cell cable into the load cell connection point shown in Figure 4-3. There will be a “click”
when the load cell cable has been properly seat
Replace the back cover on the indicator with
ed into the connection point.
the four back retaining screws and re-attach to the tilt stand.
4.2 Inserting Batteries
The six AA batteries that come with the scale offer an average of 25 hours of continuous use.
To install the batteries,
1. Open the battery chamber cover by loosening the thumbsc
2. Insert batteries into the battery chamber
as shown in Figure 4-4.
rew.
If an external power supply or USB power supply is connect
When using battery or USB power supply, the backlight power is deducted to 60%.
3. Close the battery chamber.
To maintain battery longevity we recommend you charge it
fully discharged.
Figure 4-4. Battery Chamber
ed, the battery flag on the display is turned off.
on a regular basis rather than waiting until it is
Rice Lake Wheelchair Scale Technical Manual - Indicator Setup 7
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4.3 AC Power Connections
Connect the
optional AC
power
source here
Use the optional 120 VAC adapter or 230 VAC adapter to use when power is available. The AC power adapter
plugs into the back of the indicator as shown in Figure 4-5.
Figure 4-5. Power Connection Site
8 Rice Lake Wheelchair Scale Technical Manual
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5.0 Scale Operation
On/Off
LB/KG
Print
Zero
Hold
Release
BMI
TARE
T
ENTER
The display has various front panel keys. They are shown below and their function is described in Table 5-1.
Figure 5-1. Front Panel Display Keys
Key Name Function
On/Off Switches the scale on or off.
Print
LB/KG
Zero Clears the weight off the scale and returns it to zero after three seconds.
Hold
Release
BMI Enables the user to access the BMI (Body Mass Index) function. This key only
TAR E Used to subtract the weight off the scale, example: oxygen tank, other
ENTER Used to accept height in BMI mode.
Print — A long key press will send data out from the RS-232 port.
LB/KG — A short key press allows the user to toggle between kilograms and
pounds providing that it’s enabled in configuration mode.
There is no toggling while in the BMI mode.
It works only if the current weight is stable and zero up to 2% of full weight.
Hold & Release — The first press holds the most current weight value shown on
the display.
A second press releases the weight value shown.
This key is not active while in BMI mode.
works if there is a locked weight shown on the display and the BMI function is
turned on in the configuration mode.
equipment.
Accepts the value of the parameter last en
A long press of the ENTER key during the scale’s start up process will enter the
ID displa
y (pre-parameter mode).
tered and moves to the next stage.
Table 5-1. Key Functions
Rice Lake Wheelchair Scale Technical Manual - Scale Operation 9
Page 14
Note
Important
Key Name Function
Up/Down Arrows Used to adjust height input (0.5 in/0.5 cm) while in BMI mode.
Adjusts the value of the flashing digit/number.
Table 5-1. Key Functions (Continued) (Continued)
The keys on the front panel display are very sensitive so only a gentle pushing motion is required to
obtain results.
5.1 Weighing
Use the following steps to weigh a person.
1. Press the
On/Off key to turn on the scale and 0.0 will appear on the display along with ZERO on the upper
display.
2. When the person steps on the scale the
display shows the person’s weight. The LOCK annunciator is on in
the upper display and beeps to indicate the end of the weighing process.
3. To change the display from kg to lb and vice-versa
4. To turn off the scale, press and hold the
On/Off key until OFF appears on the display.
, press the LB/KG key.
5.2 Hold/Release Function
Use the following steps to use the Hold/Release function.
1. When the person is on the scale, press the
2. When the person steps off the s
cale, the weight and the HOLD & LOCK annunciator will remain on the
display.
3. At this stage the Zero key will not work. The only way to return to zero from here is to press the Hold/
Release key one more time.
Hold/Release key.
Pressing the Hold key prior to a person getting on the scale will also work.
5.3 Preset Tare
Use the following steps to use the Preset Tare.
1. When the weight is set to
returns to
0.0 and NET appears on the display.
2. Remove the extra load from the scale. The weight will appear
3. Ask the patient to step on the scale with the extra we
NET annunciator is still on. The weight of the extra load remains stored in memory.
4. To cancel the tare weight, press and hold the
display turns back to 0.0 and GROSS appears. Tare weight is also canceled when the scale is turned off.
0.0, place the extra load on the scale. Press the TARE key until the display
TARE key until NET disappears from the display and the
with a negative symbol to the left of it.
ight. The display shows the patient’s weight. The
10 Rice Lake Wheelchair Scale Technical Manual
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5.4 Toggle Tare
Use the following steps to use the Toggle Tare function.
1. When the weight is set to 0.0, press the TARE key.
2. The default tare value is displayed (default is programmed to be 33.0 lb/15.0 kg), while the zero is
flashing.
3. Use the Up/Down arrow keys to adjust the value.
4. Press ENTER to start the tare function and the NET annunciator will be turned on instead of the GROSS
annunciator.
5.5 Using the Body Mass Index (BMI) Function
Use the following steps in determining the BMI.
LB Mode
1. Ensure that the scale is at zero.
2. Have the person step on the scale to obtain a weight.
3. The LOCK annunciator is illustrated on the display.
4. Press the BMI key. The BMI and FT/IN annunciators are lit on the display and a default value of 5 feet
and 7.5 inches (5-07.5) is flashing.
5. Use the Up/Down arrow keys to adjust the height value, and press the ENTER key to move to the next step.
6. The BMI value and BMI annunciator is shown on the display. Press CLEAR to return to the weighing
mode and the BMI function will be turned off.
KG Mode
1. Ensure that the scale is at zero.
2. Have the person step on the scale to obtain a weight.
3. The LOCK annunciator is illustrated on the display.
4. Press the BMI key. The BMI and CM annunciators are lit on the display and a default value of 170.0 cm
(170.0) is flashing.
5. Use the Up/Down arrow keys to adjust the height value, and press the ENTER key to move to the next step.
6. The BMI value and BMI annunciator is shown on the display. Press the CLEAR key to return to the
weighing mode or step off the scale and the BMI function will be turned off.
Rice Lake Wheelchair Scale Technical Manual - Scale Operation 11
Page 16
6.0 Scale Configuration
Remove four screws to access setup switch
Setup switch location
Battery
compartment
DEFCALIBPROG
DONE
Options and parameter setup are done through the scale configuration section and is used for setting values,
parameters, and options that are essential for the functioning of the scale. Access to the setup switch is located
under the tilt stand cover. Use a Phillips head screwdriver to remove the four screws holding the cover in place.
(shown in Figure 6-1— left photo).
Figure 6-1. Setup Switch Location
Use the following steps to enter into configuration mode.
1. Make sure the scale is turned off.
2. Turn the scale on by simultaneously pressing the
3. Continue to hold both keys until
Id appears. The unit cycles through its startup function and continues to
display the software version.
4. Access the recessed setup switch located in the back of the
small screwdriver or other similar object to press the setup switch.
5. Once the setup switch is pressed,
PROG appears on the display.
6. The scale can be configured using a series of menus ac
setup mode.
On/Off key and the ENTER key.
indicator. You can use a small paper clip,
cessed through the front panel when the scale is in
7. Press the BMI key to advance to the desired menu.
8. Press the
12 Rice Lake Wheelchair Scale Technical Manual
ENTER key and advance in the manual to the related menu selection for further instructions.
Figure 6-2. Top Level Menu
Page 17
6.1 Programming Mode Menu
Value
P00
DEF
Value
CALIBPROG
FULL
DONE
BAUD
TOFF
ATOLALEN
ATOUT
UNITS
OP
P01
P02
P03
P04
5
3
4
2
0
1
9
8
7
6
96
1152
48
576
288
384
192
144
DISPROUND
ARW
LOAD
SALASTART
P01-0 P02-1 P03-0 P04-1P00-1
0.0
0.0000
0
0.000
0.00
0.2
1.0
0.5
2.0
10.0
5.0
20.0
0.1
ValueValue
Value
Kg/Lb
Kg
Lb
ValueValue
Value
TEST
Various parameters can be set while in programming mode.
Those parameters are shown in Figure 6-3.
Figure 6-3. Programming Mode Menu Structure
Table 6-1 lists the various display messages and sequence when setting up the scale.
Parameter Description Choices Steps
FULL Full capacity of the scale Value (1000 lb) The display toggles between a numeric value and FULL.
If you don’t want to change the value, press the BMI key to
ve to the next setting. Example: from FULL to LOAD. If you
mo
want to change the value, use the following steps.
1. Press the EN
the right most digit.
2. Use the Up/Down arr
decrement numbers.
3. Press the BMI key to move to th
4. Use the Up/Down arr
decrement numbers.
5. Press the BMI k
6. Use the Up/Down arr
Table 6-1. Configuration Mode Menu
decrement numbers.
7. When done press the ENTER
next parameter (LOAD).
Rice Lake Wheelchair Scale Technical Manual - Scale Configuration 13
TER key to change value starting with
ow keys to increment/
e left.
ow keys to increment/
ey again to move to the left
ow keys to increment/
key to move to the
Page 18
Parameter Description Choices Steps
LOAD This is the amount of weight
applied during calibration.
Can also be changed in the
calibration menu.
ASTART Weight process start limit —
Maximum (full capacity)/10.
Determine when the weight
algorithm starts (when the
“----” is displayed), below this
value the scale will show live
weight.
ARW Auto Reweigh — Restarts the
weight algorithm if the weight
changed by more than this
value.
SAL Semi Auto Live —This value is
the interval between weight
displays during the algorithm
process.
Value (200 Lb) The display toggles between a numeric value and LOAD.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from LOAD to ASTART. If
you want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. Press the BMI key to move to the left.
4. Use the Up/Down arrow keys to increment/
decrement numbers.
5. When done, press the ENTER key to move to the
next parameter (ASTART).
Value (2.0) The display toggles between a numeric value and ASTART.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from ASTART to ARW. If
you want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. Press the BMI key to move to the left.
4. Use the Up/Down arrow keys to increment/
decrement numbers.
5. When done, press the ENTER key to move to the
next parameter (ARW).
Value (4.0 Lb) The display toggles between a numeric value and ARW.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from ARW to SAL. If you
want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. Press the BMI key to move to the left.
4. Use the Up/Down arrow keys to increment/
decrement numbers.
5. When done, press the ENTER key to move to the
next parameter (SAL).
Value (0.5) The display toggles between a numeric value and SAL.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from SAL to ROUND. If
you want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. When done, press the ENTER key to move to the
next parameter (ROUND).
Table 6-1. Configuration Mode Menu (Continued)
14 Rice Lake Wheelchair Scale Technical Manual
Page 19
Parameter Description Choices Steps
ROUND Scale Resolution —
Values in kg: 1, 2, 5, 10, 20,
50, 100
Values in lb: 1, 2, 5, 10, 20,
50, 100, 200
DISP 0.0
BAUD Baud rate 96
ATO L Algorithm initial tolerance —
Maximum value is 255.
Values above 255 will not let
you proceed and will return to
the previous value.
ALEN Algorithm initial exponent —
Maximum value 10.
Values above 10, will not let
you proceed and will return to
the previous value.
0.2
0.5
1.0
2.0
5.0
10.0
20.0
0.1
0
0.0000
0.000
0.00
48
1152
576
384
288
192
144
Value (10) The display toggles between a numeric value and ATOL
Value (8) The display toggles between a numeric value and ALEN.
The display toggles between a numeric value and ROUND.
The decimal point location is set to the DISP parameter
display decimal point location.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from ROUND to DISP. If
you want to change the value, use the following steps.
1. Press the ENTER key to change value.
2. Press the Up/Down arrow keys to change the
available parameters.
3. When done, press the ENTER key to move to the
next parameter (DISP).
The display toggles between a numeric value and DISP.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from DISP to BAUD. If you
want to change the value, use the following steps.
1. Press the ENTER key to change value.
2. Use the Up/Down arrow keys to change the
available parameters.
3. When done, press the ENTER key to move to the
next parameter (BAUD).
Note: Indicator display illustrates first two digits of baud rate
only.
The display toggles between a numeric value and baud.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from BAUD to ATOL.
If you want to change the value, use the following steps
1. Press the ENTER key to change value.
2. Use the Up/Down arrow keys to change the
available parameters.
3. When done, press the ENTER key to move to the
next parameter (ATOL).
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from ATOL to ALEN. If you
want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. Press the BMI key to move to the left.
4. When done, press the ENTER key to move to the
next parameter (ALEN).
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from ALEN to ATOUT. If
you want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. When done, press the ENTER key to move to the
next parameter (ATOUT).
Table 6-1. Configuration Mode Menu (Continued)
Rice Lake Wheelchair Scale Technical Manual - Scale Configuration 15
Page 20
Parameter Description Choices Steps
ATO UT Algorithm maximal exponent
— Maximum value is 15.
Values above 15, will not let
you proceed and will return to
the previous value.
TOFF Auto off timer — Measured in
minutes.
0 = always on.
Maximum is 9 minutes.
When using an external power
supply, this parameter is
irrelevant.
UNITS Units — Selects the unit of
measure. It can be either
Kg/Lb, Kg only or Lb only.
OP Binary options:
OP0 — Live weighing options
(0=disable, 1=enable)
OP1 — Communication
protocol (0=ESC,
1=maintenance)
OP2 — BMI menu (0=disable,
1=enable)
OP3 — RTC power
(0=disable, 1=enable)
OP4 - Semi-Auto-Live —
(0=disable, 1=enable)
OP5 - Full calculation —
(0=spatial, 1=multiply by
(0=disable, 1=enable
OP6 - Tare - (0=disable,
1=enable
OP7 - Bat type — (0=dry
batteries, 1=rechargeable
batteries)
OP8 — OIML mode (0=disable, 1=enable
Press the BMI key to cycle back to the top level menu choices, ie: PROG/CALIB/DEF/DONE/TEST
Value (10) The display toggles between a numeric value and ATOUT.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from ATOUT to TOFF. If
you want to change the value, use the following steps.
1. Press the ENTER key to change value starting with
the right most digit.
2. Use the Up/Down arrow keys to increment/
decrement numbers.
3. Press the BMI key to move to the left.
4. Use the Up/Down arrow keys to increment/
decrement numbers.
5. When done, press the ENTER key to move to the
next parameter (TOFF).
5
4
3
2
1
0
9
8
7
6
KG/LB
KG
LB
OP0
OP1
OP2
OP3
The display toggles between a numeric value and TOFF.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from TOFF to UNITS.
Press the ENTER key to move to the next parameter. (UNITS).
If you want to change the value, use the following steps.
1. Press the ENTER key to change values.
2. Use the Up/Down arrow keys to change the
available parameters.
3. When done, press the ENTER key to move to the
next parameter (UNITS).
The display toggles between unit of measurements and UNIT.
If you don’t want to change this value, press the BMI key to
move to the next setting. Example: from UNITS to OP. If you
want to change the value, use the following steps.
1. Press the ENTER key to change values.
1. Press the Up/Down arrow keys to change the value.
2. When done, press the ENTER key to move to the
next parameter (OP).
The display toggles between a binary option and POO-0.
If you don’t want to change this value, press the BMI key to
move to the next setting. If you want to change the value, use
the following steps.
1. Press ENTER to change parameters.
2. Use the Up/Down arrow keys to select the display
value you want to change.
3. Press the BMI key to move the flashing cursor.
3a. Use the
3b. Press the BMI key to move the flashing cursor.
4. Press the ENTER key to save all of the display
parameters. SAVE appears on the display.
5. Press the ENTER key again and DONE appears
indicating that you are now done entering all of the
parameters of the scale.
Up/Down
arrows to change the value.
Table 6-1. Configuration Mode Menu (Continued)
16 Rice Lake Wheelchair Scale Technical Manual
Page 21
6.2 Default Menu
DEFCALIBPROG
DONE
TEST
NO
YES
Note
Setup switch location
on back of indicator.
The default menu is used to return the scale back to its factory settings and is shown in Figure 6-4.
Figure 6-4. Default Menu
Use the following steps to return the settings back to their factory default.
1. Press the
ENTER key. The display shows a default value of NO.
2. To change to YES, press the Up/Down arrow keys.
3. Press the
4. Press the
ENTER key and the display shows DONE.
BMI key to return to PROG/CALIB/DEF/DONE/TEST upper level menu.
Selecting YES and pressing the ENTER key will reset to factory defaults settings without changing the
calibration and will return you to weigh mode.
6.3 Scale Calibration
Use the following steps to calibrate the scale.
1. Turn on scale by pressing the
2. The unit cycles through its startup fu
hold both keys until
Id appears.
3. Access the setup key located in the back of the scale to ente
use a small paper clip, small screwdriver or other similar object to press the setup key.
On/Off key and the ENTER key simultaneously.
nction and continues to display the software version. Continue to
r the setup parameters for the scale. You can
5.
Calib appears on the display and enter the calibration parameters.
6. Press the
for calibration. Lb will be flashing. To switch between lb and kg, press the
display. Once a unit is selected, press
7. To change the calibration load value, use the
digit.
4. Prog appears on the display. Press the BMI key to toggle along the parameter menu.
Figure 6-5. Setup Switch Location on Back of Indicator
ENTER key and a numeric value is displayed which represents the amount of weight that is used
Up/Down arrow keys on the
ENTER and the right most digit will be flashing.
Up/Down arrow keys to increment/decrement the flashing
Rice Lake Wheelchair Scale Technical Manual - Scale Configuration 17
Page 22
8. Use the BMI key to move the flashing digit to the left or right.
DEFCALIBPROG
DONE
TEST
VER BAT VALUE A2D
1.83
Value
Value
Value
9. Once all the digits have be
en entered, press the ENTER key and Clear is displayed.
10. Make sure the scale platform is clear of weight and press the
11. A request to put the chosen load
on the platform is displayed by Put xxx.xx.
12. Put the chosen weight on the platform and press the
13. Press the
14. Press the
15. Press the
To exit calibration without changing zero or span exis
ENTER again and the display indicates Done.
BMI key three times to exit back out to the top level Done parameter.
ENTER key to return to weigh mode.
ting calibration, press the CLEAR key, then the BMI key.
7.0 Test Menu
To access the TEST menu, use the following steps.
1. Turn the scale on by pressing the
2. Press the
3. Continue to press the
4. Once complete, press the
5. Press the
ENTER key again.
BMI key to scroll through the various menu items.
BMI key again and Done is displayed.
ENTER key to start the weighing process.
On/Off key and the ENTER key simultaneously until ID flashes.
ENTER key again and ===== is displayed.
ENTER key. ===== is displayed and then Save.
Figure 7-1. Test Menu
Tes t M e nu
Parameter Choice Description
VER Value Displays the current software version.
BAT Value Displays the current battery level.
VALUE Val ue Displays the actual value.
A2D Valu e Displays the actual raw counts of the scale.
Table 7-1. Test Menu
18 Rice Lake Wheelchair Scale Technical Manual
Page 23
8.0 RS-232 Communication
The scale comes with an RS-232 port which enables weight data to be transmitted to other equipment, such as a
computer or printer. The RS-232 cable with DB-9 connector (PN 100719) is available from Rice Lake Weighing
Systems.
The RS-232 parameters are 9600 baud (selectable in the programming mode), 8 data bits, 1 stop bit, no parity
and no handshaking.
There are three methods of communication:
8.1 Pushbutton Keypad Print
With a stable, in-range weight, press and hold the Kg-Lb/Print key for at least three seconds, or until the scale
emits two quick beeps. Note that if the scale does not beep after five seconds, then release the button as the
weight was either in motion, or out of range.
xxxxxxxxx<SP>uu<SP>mmmmm<SP><CR><LF>
Where:
Examples:
Figure 6-1 shows the RS-232 connection location.
• Pushbutton keypad print
• Standard remote protocol
• Escape protocol
• If displaying weight and not BMI, the scale will send out the following 21 character string:
xxxxxxxxx is the weight with decimal point and “ - “ sign, if negative, uu is the unit (lb or kg).
mmmmm is the mode (gross or net)
-10 Lb net = <SP><SP><SP><SP>-10.0<SP>lb<SP><SP>Net<SP><SP><SP><CR><LF>
10 Lb gross = <SP><SP><SP><SP><SP>-10.0<SP>lb<SP>Gross<SP><CR><LF>
• In BMI mode (displaying the BMI value), the scale will send out the following data:
GROSS WEIGHT 215.0 LB
TARE WEIGHT 0.0 LB
NET WEIGHT 215.0 LB
PATIENT HEIGHT 6-01.0 FT
PATIENT BMI 28.4
Rice Lake Wheelchair Scale Technical Manual - RS-232 Communication 19
Page 24
8.2 Communication Protocols
The Rice Lake Digital Wheelchair Scale has two communication protocols, escape and maintenance protocol.
8.2.1 Escape Protocol
An escape protocol is where the escape (0X1B or ASCII 27) is used to indicate that there is a command
following. On the PC side there must be a listener created by the vendor that will interpret this protocol. This
listener must also take care of all the issues regarding data integrity, etc. to make sure that the data that was sent
and received is valid.
Two examples include:
• Scale initiated communication
• PC initiated communication
Table 8-1 is what can be sent across communications
PC Initiated ESC Value
lines.
Request current va
Diagnostics A
Send scale control messages C
PC Initiated ESC Value
Send single reading R
Send diagnostic response
lues/settings R
Table 8-1. Escape Protocol Commands
Table 8-2 lists the ESC characters that will be used.
ESC value with
Name ESC character
Reading R R Tells the PC that the scale is sendi
Weight W Wnnn.n Is the patient weight (example: W020
Height H Hnnn.n Patient height
BMI B Bnn.n Patient BMI
Units N Nc Indicates in which unit the values have been
End of Packet
OP)
(E
Diagnostics
(r
equest)
Diagnostics
esponse)
(r
Control (set a
ue)
val
E E Indicates that the end of the command has been reached.
A Accc A request for a diagnostic test on certain parts of the scale (such as
Z Zccc This will be the response of the diagnostics done on the scale. Values
C Cccc=c Sets the value of the scale’s global settings. Example:
parameters
Description
ng a reading. Immediately following
this is the value that is sent. Example:
<ESC><R>ESC><W0200.0<ESC>Nm<ESC>E
00 means 200.0). If the scale is
overloaded or under loaded, the scale will return the value 999.99.
c=constitutional).
battery life, load cells).
will include error codes to indicate what is wrong with the scale, or all
zeros (Z000) to indicate that all is well.
<ESC><CUOM=m><ESC><E will set the unit of measurement.
taken (m=metric,
Table 8-2. ESC Characters
Name of Control Identifier Unit
Unit of Measure (metric or constitutional) UOM c (m or c)
Table 8-3. Scale Global Values List and Identifiers
20 Rice Lake Wheelchair Scale Technical Manual
Page 25
Samples of Escape Protocol
&4$3&4$&
3FBEJOH
SFRVFTU
&01
3#!,%0#
&01
6OJUPG.FBTVSF.FUSJD
&4$3&4$8&4$/N&4$&
3FBEJOH
$PNNBOE
8FJHIU
&4$"#"5&4$&
%JBHOPTFCBUUFSZ
&01
3#!,%0#
DIRECTIONOFCOMMUNICATION
&4$;&6&4$&
#BUUFSZJTPLBZ
OPFSSPST
&01
&4$;&-&4$&
#BUUFSZJTWFSZMPX
6OTUBCMF
&01
Figure 8-1 and 7-2 show what the diagrams will look like on the PC as the scale measures weight and sends over
this communications line:
Figure 8-1. Sample of Escape Protocol
Figure 8-2. Sample of Escape Protocol
When the user wants to diagnose the problems on the scale, it looks like the Figure 8-3 and 7-4.
Figure 8-3. Diagnose the Escape Protocol Diagram
Figure 8-4. Diagnose Battery Protocol Diagram
Rice Lake Wheelchair Scale Technical Manual - RS-232 Communication 21
Page 26
8.2.2 Maintenance Protocol
USB Connection
RS-232 connection
Load Cell Connection
Under This Cover
Table 8-4 lists the maintenance protocol commands.
Command Definition
R Reboot
V Firmware ID + development version
W Current weight
A Current AD
Z Zero the scale
F Show flash values (used for the first flash process)
L USB On/Off (not available on USB communication
Table 8-4. Maintenance Protocol Commands
8.3 USB Connection
The Rice Lake Wheelchair Scale has the capability of connecting to a PC using a USB connection and a USB
cable (not included). That connection location is shown in Figure 8-5.
Figure 8-5. USB Connection Port
Connecting software and downloads should be addressed by your IT department and can vary depending on what
type of computer platform you’re using. Basic information on USB driver installation using Windows® is
described in the following steps and serves only as an example. The USB driver can be downloaded from the
Rice Lake Weighing Systems website at the following location; http://ri
Select Medical/Health Scales Downloads/Software and Get Downloads.
celake.com/software.aspx
Opening any product, will show a USB
Driver download. Click on Download to open and download the driver to your computer.
1. The graphic below shows the window that pops up w
hen the USB cable is connected to the indicator and
the scale is turned on.
22 Rice Lake Wheelchair Scale Technical Manual
Page 27
Follow the on screen prompts to navigate through the screens shown below.
2. Select No, not this time and then select Next.
3. Select Install the software automatically then select Next.
4. The following screen appears while the driver is installing on to your system.
Rice Lake Wheelchair Scale Technical Manual - RS-232 Communication 23
Page 28
5. The following screen appears when installation is complete. Click on Finish.
Note
6. If you want to verify the installation, you can view the driver by looking at the device manager of your system.
7. To print a ticket using the USB driver, open the software driver (shown above) and the port assigned to
that driver is displayed.
8. Ensure that the USB cable is properly connected and the unit is on.
9. Another terminal type program (such as Hyperterminal) needs to be opened and connected through the
USB
driver to the indicator to be able to see the information being sent to the PC. A port needs to be
established so select the port that is assigned to Parpar and print the ticket. The following example tickets
will print.
A single print ticket has four spaces after the “patient weight” and only one space between weight and lb
in the examples shown above. Then seven <CR><LF> after.
24 Rice Lake Wheelchair Scale Technical Manual
Page 29
9.0 Maintenance
Wheels and
cable on this
side of scale
(not shown)
Two recessed
handles for
lifting
9.1 Transporting & Storing the Scale
For ease of portability, the Rice Lake Wheelchair Scale comes with two built-in handles and wheels. This allows
the user to transport the scale from one location to another. Use the following steps to transport the scale or to
store it.
1. Carefully pick up the scale by standing on the side opp
from the bottom of the scale platform.
osite of the wheels, where the cabling comes out
Figure 9-1. Pick up Scale Using Handles
2. With scale upright, wrap cable around brackets on underside of scale and hang indicator on bracket.
3. The scale can now be rolled to another location.
Figure 9-2. Roll Away For Transporting or Storage
Rice Lake Wheelchair Scale Technical Manual - Maintenance 25
Page 30
10.0 Troubleshooting and Testing
Refer to the following to check and correct any failure before contacting service personnel.
Symptom Possible Cause Corrective Action
Scale does not turn on. Dead battery Connect the scale to a power source.
Faulty electrical outlet Use a different electr
Bad power supply Replace adaptor.
Questionable weight or the scale does not
zer
o.
The display shows E messages as detailed below.
E06
E07 A/D is too low.
E10 Overload Scale has been overloaded. Remove load from scale.
E4L BAT
E4U
E11 CAL
Err 2 Low saturation state (low A/D) The load cell is not connected properly. Check the
Err 3 High saturation state (high A/
Err 6 Unstable weight. Cannot calibrate. Check the load cells’ mechani
SAT Damaged load cell cable Replace load cell cable.
External object is interfering with the
scale.
Display did not show 0.0 before weighing. Help the patient off the scale, zer
Scale is not placed on a level floor. Ensure the scale is level a
Scale is out of calibration. Check the weight with a
Identifier
— ADC
D) See Err 2.
Remove the interfering object from the scale.
the weighing process again.
process again.
A/D is too high.
Battery low but still useable
indicator display.
Battery low and unstable
indicator display.
Calibration Error
cables a
nd mechanical connections. If the problem
persists, replace the set of load cells.
that nothing touches them and that the cables are
properly welded.
ical outlet.
o the scale and begin
nd begin the weighing
known weight value.
— One bar left on the
— no bars left on the
— recalibrate the scale again.
cal surroundings and see
Table 10-1. Troubleshooting Table for the Rice Lake Scale Line
26 Rice Lake Wheelchair Scale Technical Manual
Page 31
11.0 Scale Specifications
Load Cell Excitation
Rated Excitation: 10 VDC
Maximum Excitation: 15 VDC
Grade Level Requirements
The supporting surface for the four feet of the scale must be level within 1/4 inch of horizontal.
Nominal Scale Height
3.0 inch (76 mm)
Approvals
CE
11.1 Indicator Specifications
Power
120 VAC-9VDC-50Hz / 230 VAC-9VDC-50Hz
Battery Type
6 AA size Alkaline batteries
Battery Use
25 hours continuous use
Automatic power-off can be configured
Environmental
Operating Temperature
50 to +104°F (14 to 40°C)
Storage Temperature
32 to 158°F (0 to 70°C)
Humidity
85% relative humidity
Certifications and Approvals
RoHS Compliant
Rice Lake Wheelchair Scale Technical Manual - Scale Specifications 27
Page 32
For More Information
System Manuals
• RL-350 Series Wheelchair Scale Operating Manual, PN 162469
Literature
• Wheelchair Scales, 4 Color, PN 115157
Web Site
• http://www.ricelakehealth.com
Contact Information
Hours of Operation
Knowledgeable customer service representatives are available 6:30 a.m. - 6:30 p.m. Monday through Friday and
8 a.m. to 12 noon on Saturday. (CST)
Telephone
• Sales/Technical Support 800-472-6703
• Canadian and Mexican Customers 800-321-6703
• International 715-234-9171
Immediate/Emergency Service
For immediate assistance call toll-free 1-800-472-6703 (Canadian and Mexican customers please call
1-800-321-6703). If you are calling after standard business hours and have an urgent scale outage or emergency,
press 1 to reach on-call personnel.
Fax
Fax Number 715-234-6967
Email
• U.S. sales and product information at prodinfo@ricelake.com
• International (non-U.S.) sales and product information at intlsales@ricelake.com
Mailing Address
Rice Lake Weighing Systems
230 West Coleman Street
Rice Lake, WI 54868 USA
28 Rice Lake Wheelchair Scale Technical Manual
Page 33
Rice Lake Wheelchair Scale Limited Warranty
Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a
Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed by
the Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects in
materials and workmanship for two years.
RLWS warrants that the equipment sold hereunder will conform to the current written specifications authorized
by RLWS. RLWS warrants the equipment against faulty workmanship and defective materials. If any equipment
fails to conform to these warranties, RLWS will, at its option, repair or replace such goods returned within the
warranty period subject to the following conditions:
• Upon discovery by Buyer of such nonconformity, RLWS will be given prompt written notice with a
detailed explanation of the alleged deficiencies.
• Individual electronic components returned to RLWS for warranty purposes must be packaged to
prevent electrostatic discharge (ESD) damage in shipment. Packaging requirements are listed in a
publication, Protecting Your Components From Static Damage in Shipment, available from RLWS
Equipment Return Department.
• Examination of such equipment by RLWS confirms that the nonconformity actually exists, and was
not caused by accident, misuse, neglect, alteration, improper installation, improper repair or
improper testing; RLWS shall be the sole judge of all alleged non-conformities.
• Such equipment has not been modified, altered, or changed by any person other than RLWS or its
duly authorized repair agents.
• RLWS will have a reasonable time to repair or replace the defective equipment. Buyer is responsible
for shipping charges both ways.
• In no event will RLWS be responsible for travel time or on-location repairs, including assembly or
disassembly of equipment, nor will RLWS be liable for the cost of any repairs made by others.
THESE WARRANTIES EXCLUDE ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WITHOUT
LIMITATION WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. NEITHER
RLWS
NOR DISTRIBUTOR WILL, IN ANY EVENT, BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
RLWS AND BUYER AGREE THAT RLWS’S SOLE AND EXCLUSIVE LIABILITY HEREUNDER IS LIMITED TO
REPAIR OR REPLACEMENT OF SUCH GOODS. IN ACCEPTING THIS WARRANTY, THE BUYER WAIVES ANY AND
ALL OTHER CLAIMS TO WARRANTY.
SHOULD THE SELLER BE OTHER THAN RLWS, THE BUYER AGREES TO LOOK ONLY TO THE SELLER FOR
WARRANTY CLAIMS.
NO TERMS, CONDITIONS, UNDERSTANDING, OR AGREEMENTS PURPORTING TO MODIFY THE TERMS OF THIS
WARRANTY SHALL HAVE ANY LEGAL EFFECT UNLESS MADE IN WRITING AND SIGNED BY A CORPORATE
OFFICER OF RLWS AND THE BUYER.
© Rice Lake Weighing Systems, Inc. Rice Lake, WI USA. All Rights Reserved.
Rice Lake Wheelchair Scale Technical Manual - Scale Specifications 29
Page 34
30 Rice Lake Wheelchair Scale Technical Manual
Page 35
Page 36
230 W. Coleman St. • Rice Lake, WI 54868 • USA
U.S. 800-472-6703 • Canada/Mexico 800-321-6703 • International 715-234-9171 • Europe +31 (0) 88 2349171
www.ricelake.com www.ricelake.mx www.ricelake.eu www.ricelake.co.in m.ricelake.com
© Rice Lake Weighing Systems 09/2014 PN 163357 Rev A
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