RICE LAKE SB-1150 Summit Bariatic Wheelchair Scale Instruction Manual

RICE LAKE SB-1150 Summit Bariatic Wheelchair Scale

Introduction

The Summit SB-1150 is a heavy-duty scale that offers exceptional performance in clinics and hospitals. Patients walk or can be wheeled onto the weighing platform to be weighed. The Summit SB-1150 Bariatric Wheelchair Scale is a fully electronic, low profile floor scale that measures 36 in x 36 in (.91 m x .91 m), and has a capacity up to 1000 lb (500 kg). The SB-1150 uses four corner-mounted, alloy steel shear beam load cells, with the cells recessed into the frame channels for protection. The Summit SB-1150 comes equipped with a large 1″ LCD indicator display and 6 AA batteries for use when power is not readily available. There is an optional 120/230V AC adapter which can be purchased. Load cell cables run through the main channels and are held down with replaceable cable ties near each corner to eliminate the possibility of cable damage. One threaded hole, located in the center of the deck, allows for placement of a removable eyebolt for lifting the scale from above with chains. The scale must always be lifted from above with chains through the eyebolt to avoid the possibility of foot and load cell damage from forklift tines. See Figure 2-1 on page 3. The adjustable feet allow for leveling the scale in the event of minor floor irregularities. The Summit SB-1150 comes equipped with a large 1″ LCD indicator.The indicator can be powered by 6 AA batteries, also included. An optional 120/230V AC adapter can be purchased. This manual can be viewed and downloaded from the Rice Lake Weighing Systems website at: www.ricelake.com

Safety

Safety Signal Definitions:

DANGER Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. Includes hazards that are exposed when guards are removed.
WARNING Indicates a potentially hazardous situation that, if not avoided could result in serious injury or death. Includes hazards that are exposed when guards are removed.
CAUTION Indicates a potentially hazardous situation that, if not avoided, could result in minor or moderate injury.
Important Indicates information about procedures that, if not observed, could result in damage to equipment or corruption to and loss of data.

General Safety

Do not operate or work on this equipment unless this manual has been read and all instructions are understood. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Rice Lake Weighing Systems dealer for replacement manuals.

WARNING

Failure to heed may result in serious injury or death.

• People with disabilities, or who are physically frail, should always be assisted by another person when using this scale. Do not allow minors (children) or inexperienced persons to operate this scale.
• Do not use this scale when your body/feet are wet, such as after taking a bath.
• Do not use the scale on slippery surfaces, such as a wet floor. Avoid contact with excessive moisture.
• Do not jump on the scale.Do no operated without all shields and guards in place.
• Do not place fingers into slots or possible pinch points.
• Do not remove or obscure warning labels.
• A minimum of two people should transport, unpack and assemble the scale for their own personal safety and to ensure the integrity of the scale.
• Do not use any load bearing components worn beyond 5% of the original dimension.
• Do not use this product if any components are cracked, broken, frayed or cut.
• Do not exceed the weight limit of the scale. Weight exceeding the maximum capacity (1000 lb/500 kg) may damage the scale. Operating at voltages and frequencies other than specified could damage the equipment.
• Do not drop the scale or subject it to violent shocks.
• Do not use in the presence of flammable materials.
• Do not make alterations or modifications to the scale.
• Do not use for purposes other than weight taking.
• Always use medical grade isolators for USB and RJ45 when connected to non-medical equipment, or when other medical equipment is connected to patient during procedure.

Installation

Scale

Standard installation of the scale consists of the following:

• Select a site
• Adjust the four leveling feet on the scale
• Connect cable to the indicator
• Calibrate the scale

Site Preparation3

Consider the following when choosing a site for the scale:

•  Select a site where overweight loads can maneuver easily without crossing the platform
•  Avoid areas where damage could occur from side impacts of wheels or forklift tines
•  Avoid areas where falling objects could cause shock damage
•  Avoid areas where water may damage a scale not meant for a washdown environment
•  The scale must be level within 1/4” of horizontal
•  The interface cable between the scale and the indicator must be protected against crushing, cutting and moisture damage

Important

The scale must not be loaded beyond capacity, even momentarily. Choose a site where the floor is level to 1/4” to avoid excessive shimming. The floor may require modification if unable to select an area up to this standard. If the chosen site has potential dangers to cable integrity, some method of protection, such as running the cable in conduit, is required.

Unpacking

Remove all packing material and inspect the contents for damage possibly caused during shipment. Contact Rice Lake Weighing Systems and the shipper immediately if there is damage to the scale. The shipping container should contain the scale, scale feet, the indicator, and a 10-ft length of load cell cable.
The Summit SB-1150 has one threaded hole located in the center of the deck to allow for the installation of an eyebolt. An eyebolt hook and chains can then be used to lift the scale. It is recommended to use a 1/2 in-20NF eyebolt for lifting the scale.

Assembly

The scale feet are shipped detached from the scale for load cell protection during shipment.

1.  Unpack all parts.
2.  Ensure each foot is screwed in until the foot touches either the load cell or the underside of the deck.
3.  Unscrew each foot three complete turns.
4.  Place a spirit level on the deck.
5.  Adjust corners not contacting the floor by unscrewing the feet on those corners until they just contact the floor surface.
6.  When all the feet are in contact with the floor, check the deck with the spirit level to ensure the scale is within 1/4” of level.

Electrical Interface to the Indicator

Ten feet of 4-wire cable for connecting the scale to the weight indicator is supplied with each scale. The junction box is easily accessible through an access plate located on the side of the scale. Use the following steps to wire the junction box.

1.  Remove the two #10 x 3/8″ screws.
2.  Slide the junction box assembly out of the deck.
3.  Open and remove the top of junction box.
4.  Push the cable end into the junction box through a cord grip.
5.  Connect the wires to the indicator terminal (Figure 2-2) as shown in Table 2-1.
6.  Pull out excess and tighten the cord grip to hold the cable snugly.
   Cable Color Code| Junction Box
   ---|---
   White| + Excitation
   Green| – Excitation
   Black| + Signal
   Red| – Signal
   Bare| Shield

7. The cable must be routed to the indicator in a manner that will protect the cable from damage. The method of cable protection in non-washdown applications is shown in Figure 2-3 on page 5. Leave a loose coil of excess cable under the scale to facilitate lifting of the scale for servicing and cleaning
8.  Complete the connections to the indicator once the cable is protected and in its final position.
9.  Trim corners, if necessary. See Figure 6.3 on page 24.
10.  Ensure all strain relief fittings are tight.
11.  Replace the junction box cover and slide the junction box back into the scale deck.
12. Replace the access plate and secure with the screw removed in Step 1.

Indicator

The connection ports on the back of indicator include

Load Cell Connections

he scale comes with 10′ of load cell cable; this cable must be connected to the indicator. To gain access to the load cell connection on the indicator:

1. Unscrew and remove the tilt stand bracket from the indicator.
2. Figure 2-5. Remove Tilt Stand  Remove the four back retaining screws to remove the back cover to the indicator.
3.  Plug the end of the load cell cable into the load cell connection. When it clicks the load cell cable is properly seated into the connection.
4. Figure 2-7. Load Cell Connection Point 4. Reinstall the backplate and re-attach to the tilt stand.

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 thumbscrew.
2. Insert batteries into the battery chamber as illustrated in the back of the chamber.
3. 3. Close the battery chamber.

Note Batteries must be removed from the unit prior to long periods of disuse or long term storage.

Optional Power Connections

Rice Lake Weighing Systems offers optional AC adapters to use when power is available. USB power can also be used.

Important Using adapters not supplied by Rice Lake Weighing Systems voids all warranties.

Note If an external power supply or USB power supply is connected, the battery flag on the display is turned off. When using battery or USB power supply, the back-light power is deducted to 60%.

Operation

This section describes the indicator, functionality of each button and basic scale operations.

Item No.| __

Function

---|---
1| Access the BMI (Body Mass Index) function. The BMI function must be enabled in configuration and a sta- ble weight must be displayed.
2| Subtract weight off the scale. For example: oxygen unit or other equipment.
3| Return to weigh mode after displaying BMI value.
4| Print — long key press sends data out from the RS-232 port.

LB/KG — short key press toggles between kilograms and pounds (must be enabled in configuration mode). Toggle is disabled in the BMI mode.

5| Clears the weight value and displays zero after three seconds. The weight must be stable and less than 2% of capacity.
6| Hold & Release — First press holds the current weight value displayed. A second press releases the weight value.This key is disabled in the BMI mode.
7| Turns the scale on and off.
8| Accepts the value of the parameter last entered and moves to the next stage.

For example, accept the input height value in the BMI mode.

A long press of the ENTER key during start up enters the ID display (pre- parameter mode).

9| Adjust the value of the flashing digit/number.

For example, adjust height input (0.5 in/0.5 cm) in the BMI mode.

Important The front panel keys are sensitive, press gently.

Powering the Scale

1. 1.       1. Press to turn the scale on. _0_ displays.

   1.   2. Press and hold until _OFF_ displays to turn the scale

           Weigh Mode

1. Step onto the scale. The weight value displays, the LOCK annunciator turns on in the upper display and an audible tone indicates the end of the weighing
2. Short press to toggle the display from kg to lb, if

          Hold Release

1. Step onto the scale. The weight value displays, the LOCK annunciator turns on in the upper display and an audible tone indicates the end of the weighing process
2. Press to hold the weight value on the display.
3. Step off the scale. The weight continues to display and the HOLD LOCK annunciator turns on in the upper display. The does not work at this stage.
4. Press to return to zero. 0.0 is displayed and the ZERO annunciator is on.

Note Pressing prior to stepping on the scale will also hold the weight display.

Preset Tare

1. With the weight at 0.0 and the ZERO annunciator on, place the additional items (e.g. oxygen unit or other equipment) onto the scale. Wait for the weight to stabilize.
2. Press until 0.0 is displayed and the NET annunciator is on.
3. Remove the additional items from the scale. The weight is displayed with a negative symbol to the left of it and the NET annunciator remains on.
4. Step on the scale with the additional items. The weight is displayed and the NET annunciator remains on. The weight of the additional items remain stored in memory.
5. To cancel the tare weight, press and hold until the NET annunciator is no longer displayed. The
   weight returns to 0.0 and the GROSS annunciator displays.

Note The tare weight is also canceled when the scale is turned off.

Toggle Tare

Toggle tare is used to set a tare value when the weight of the additional items is known.

1. With the weight at 0.0 and the ZERO annunciator on, press . The default tare value (33.0 lb/15.0 kg) is
   displayed.

2. Press and/or to adjust the tare weight value.

3.  Press to accept the entered value and start the tare function. The weight is displayed with a negative symbol to the left of it and the NET annunciator is displayed.

4. Step on the scale with the additional items. The weight is displayed and the NET annunciator remains on.
   The weight of the additional items remain stored in memory.

5.  To cancel the tare weight, press and hold until the NET annunciator is no longer displayed. The
   weight returns to 0.0 and the GROSS annunciator displays.

Body Mass Index

LB Mode

1. With the weight at 0.0 and the ZERO annunciator on, step onto the scale. The weight value displays, the
   LOCK annunciator is on and an audible tone indicates the end of the weighing process.

2. Press . The BMI and FT/IN annunciators display and a default value of 5′ and 7.5” (5-0.75) is flashing.

3. Press and/or to adjust the height value.

4.  Press to accept the entered height value. The BMI value is displayed and the BMI annunciator is on.

5. Press to return to turn off the BMI function and return to the weigh mode.

KG Mode

1. With the weight at 0.0 and the ZERO annunciator on, step onto the scale. The weight value displays, the
   LOCK annunciator is on and an audible tone indicates the end of the weighing process.

2. Press . The BMI and FT/IN annunciators display and a default value of 170.0 cm (170.0) is flashing.

3.  Press and/or to adjust the height value.

4.  Press to accept the entered height value. The BMI value is displayed and the BMI annunciator is on.

5.  Press to return to turn off the BMI function and return to the weigh mode.

Configuration

The scale configuration is used to set parameters and their values that are essential for the functioning of the scale.

Use the following steps to enter into configuration mode.

1. Ensure the scale is off.
2. Press and hold the On/Off key and the ENTER key until Id displays. The unit continues to power on
3.  Remove the tilt stand cover by loosening the screws securing it to the indicator.
4.  Use a small non-conductive tool to press the setup switch. PROG displays.

Scale Navigation

The scale is configured using a series of menus accessed through the front panel when the scale is in setup mode.

To scroll through the parameters of each menu, press the BMI key.

Change Parameters

• Press the ENTER key to enter a menu/parameter
•  Press the Up/Down arrow keys to scroll through the available selections
•  Press the ENTER key to save the selection and move to the next parameter

 Enter Numbers

•  Press the ENTER key to enter parameter value
•  Use the Up/Down arrow keys to increment/decrement numbers
•  Press the BMI key to move to the next digit
•  Press the ENTER key to save value and move to the next parameter

Save and Return to Main Menu

•  When a parameters selections/values are correct, press the ENTER key. SAVE displays.
•  When all parameters selections/values are correct, press the ENTER key again. DONE displays
•  Press the BMI key to cycle back to the top level menu choices

Programming Mode Menu

Table 4-1 lists the various display messages and sequence when setting up the scale

also be changed in the calibration menu
ASTART| Value (2.0)| Weight process start limit — Maximum (full capacity)/10; Determines when the weight algorithm starts (when the is displayed), below this value the scale displays live weight.
ARW| Value (4.0 Lb)| Auto Reweigh — Restarts the weight algorithm if the weight changed by more than this value.
SAL| Value (0.5)| Semi Auto Live — the interval between weight displays during the algorithm process.
ROUND| 0.2| Scale Resolution — display toggles between a numeric value and ROUND.
| 0.5| The decimal point location is set to the DISP parameter display decimal point location.
| 1

2

| NOTE: Default for kg is 1
| 5|
| 10|
| 20|
| 0.1|
DISP| 0.0| The display toggles between a numeric value and DISP.
| 0|
| 0.0000|
| 0.000|
| 0.00|
Parameter| Selections| Description
---|---|---
BAUD| 96

48

1152

576

384

288

192

144

| Baud Rate – displays first two digits of baud rate only.
ATOL| Value (10)| Algorithm Initial Tolerance — Maximum value is 255.

Value above 255 does not allow indicator to proceed and will return to the previous value

ALEN| Value (8)| Algorithm Initial Exponent — Maximum value 10.

Value above 10 does not allow indicator to proceed and will return to the previous value.

ATOUT| Value (10)| Algorithm maximal exponent — Maximum value is 15.

Values above 15, does not allow indicator to proceed and will return to the previous value.

TOFF| 5

4

3

2

1

0

9

8

7

6

| Auto off timer — Measured in minutes. 0 = always on, maximum is 9 minutes.

When using an external power supply, this parameter is not used.

UNITS| KG/LB

KG LB

| Units — select the unit of measure.
OP| OP0 OP1 OP2 OP3| 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

1. Default Menu

2. The default menu is used to return the scale back to its factory settings.

3. Press the ENTER The display shows a default value of NO.
   

4. Press the Up/Down arrow keys to display YES.

5. Press the ENTER DONE displays.

6. Press the BMI key to return to main

Note Selecting YES and pressing the ENTER key will reset to factory defaults settings without changing the calibration and returns the indicator to weigh mode.

Scale Calibration

To calibrate the scale:

1. Ensure the scale is off.
2.  Press and hold the On/Off key and the ENTER key until Id displays. The unit continues to power on.
3.  Remove the tilt stand cover by loosening the screws securing it to the indicator.
4. Use a small non-conductive tool to press the setup switch. PROG displays.
5.  Press the BMI key to scroll to CALIB.
6.  Press the ENTER key to enter the calibration parameters.
7.  Press the ENTER key and a numeric value is displayed which represents the amount of weight that is used for calibration. Lb flashes. Press the Up/Down arrow keys to the desired unit.
8.  Press ENTER. The digit on the right flashes.
9.  Use the Up/Down arrow keys to increment/decrement the flashing digit if required.
10.  Use the BMI key to move to the left.
11.  When the value is displayed, press the ENTER key. Clear displays.
12.  Ensure the scale platform is clear of weight, then press the ENTER key. ===== displays.
13.  When Put xxx.xx. displays, put the weight on the platform, then press the ENTER key. ===== and then Save displays.
14.  Press the ENTER key. Done displays.
15.  Press the BMI key three times to exit to the top level Done parameter.
16.  Press the ENTER key to return to weigh mode.

To exit calibration without changing zero or span existing calibration, press the CLEAR key, then the BMI key.

Test Menu

To access the TEST menu:

1. Ensure the scale is off.
2. Press and hold the On/Off key and the ENTER key until Id displays.
3.  Press the ENTER key again.
4.  Continue to press the BMI key to scroll through the various menu items.
5.  Once complete, press the BMI key again and Done is displayed.
6.  Press the ENTER key to start the weighing process.
   Parameter| Choice| Description
   ---|---|---
   VER| Value| Displays the current software version.
   BAT| Value| Displays the current battery level.
   VALUE| Value| Displays the actual value.
   A2D| Value| Displays the actual raw counts of the scale.

Communication

The indicator 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. Figure 5-3 on page 20 shows where the RS-232 connection is located on the indicator.
Important Always use medical grade isolators for USB and RJ45 when connected to non-medical equipment, or
when other medical equipment is connected to patient during procedure. 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:

•  Pushbutton keypad print
•  Escape protocol
•  Maintenance protocol

Pushbutton Keypad Print

the a stable, in-range weight, press and hold for at least three seconds, or until the scale emits two quick beeps.
NOTE If the scale does not beep after five seconds, release the button as the weight was either in motion, or out of
range.
In the weigh mode, the scale sends the 21 character string: xxxxxxxxxuummmmm
Where:
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)
Example:
-10 Lb net = -10.0lbNet 10 Lb gross = 10.0lbGross
Example : in BMI mode (displaying the BMI value), the scale sends the following data:
GROSS WEIGHT 215.0 LB
TARE WEIGHT 0.0 LB
NET WEIGHT 215.0 LB
PATIENT HEIGHT 5-01.0 FT
PATIENT BMI 30.1

Escape Protocol

The escape protocol uses the escape (0X1B or ASCII 27) to indicate that a command is following. On the PC side there must be a software 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 ensure the data sent and received is valid.
Two examples include:

•  Scale initiated communication
• •  PC initiated communication
    PC Initiated| ESC Value
    ---|---
    Request current values/settings| R
    Diagnostics| A
    Send scale control messages| C
    PC Initiated| ESC Value
    Send single reading| R
    Send diagnostic response|
    __

Name

| ESC

Character

| ESC Value With Parameters| __

Description

---|---|---|---
Reading| R| R| Indicates the scale is sending a reading. Immediately following is the value sent. Example: ESC><W0200.0NmE
Weight| W| Wnnn.n| Patient weight (example: W02000 = 200.0). The scale returns the value 999.99 if the scale is overloaded or under loaded.
Height| H| Hnnn.n| Patient height
BMI| B| Bnn.n| Patient BMI
Units| N| Nc| Indicates the unit of the values (m=metric, c=constitutional).
End of Packet (EOP)| E| E| Indicates the end of the command.
Diagnostics (request)| A| Accc| A request for a diagnostic test on parts of the scale (e.g. battery life, load cells).
Diagnostics (response)| Z| Zccc| The response of the diagnostics done on the scale. Values can include error codes to indicate a problem with the scale; or, all zeros (Z000) to indicate proper function- ing of the scale.
Control (set a value)| C| Cccc=c| Sets the value of the scale’s global settings.

Example: <CUOM=m><E sets the unit of measurement.

Samples of Escape Protocol

Examples of what is sent to the computer from the scale.

Maintenance Protocol

Maintenance protocol commands are described in Table 5-4.

1.  USB Connection

The scale can be connected to a PC using a USB connection and a USB cable

Always use medical grade isolators for USB and RJ45 when connected to non- medical equipment, or when other medical equipment is connected to patient during procedure..

Figure 5-3. USB and RS-232 Connection Ports  Connecting software and downloads should be addressed by an IT professional, and can vary depending on the computer platform used. Basic information on USB driver installation using Windows® is described in the following steps and serves only as an example. A USB driver can be downloaded from the Rice Lake Weighing Systems website at: https://www.ricelake.com/resources/software- firmware

Find the Titanium USB Driver. Click on Download to open and download the driver to a local computer

When the USB cable is connected to the indicator and the scale is turned on, a display prompts to navigate through the software install process

Select No, not this time, and then click Next.
Select Install the software automatically, then select Next. A file transfer screen displays as the file downloads and installs to the computer.
Click on Finish when the completion screen displays.

8. To verify the installation, the driver can be viewed in the device manager of the computer.

9. To configure a printer using the USB driver, open the software driver Parpar in the device manager
(Figure 5-8). The port assigned to that driver is displayed.
10. Ensure the USB cable is properly connected and the unit is on.
11. Open and connect a terminal emulation program, such as Hyperterminal, via the USB driver. Select the port assigned to the software driver Parpar to establish a port. The terminal emulation program is necessary to view information transmitted from the indicator to the PC.

12. Press . The following example tickets print.

Maintenance and Troubleshooting

Maintenance

The following section provides instructions for maintaining and cleaning the Rice Lake line of scales. Do not immerse the scale in cleaning or other liquid solutions. Do not use Isopropyl alcohol or other solutions to clean the indicator display surface.

Basic Maintenance

Before using the scale and after periods of non-use, check the scale for proper operation and function. If the scale does not operate correctly, contact a qualified service personnel. Basic maintenance includes:

•  Check the overall appearance of the entire scale for any obvious signs of damage.
•  Inspect the condition of the AC adapter cord for cracking, fraying or broken/bent prongs.

Cleaning

Proper care and cleaning is essential to ensure a long life of accurate and effective operation. Before beginning the cleaning process, disconnect the scale from the AC power source.

•  Clean all external surfaces with a clean, damp cloth or tissue.
•  Mild soap and water solution may be used.
•  Standing platform may be cleaned with Isopropyl alcohol
•  Dry with a clean soft cloth.

Troubleshooting

Refer to Table 6-1. to diagnose and correct failures prior contacting service personnel for assistance.

Scale does not turn on

| Dead battery| Replace batteries or connect scale to a power source
Faulty electrical outlet| Use a different electrical outlet
Bad power supply| Replace AC adapter

Questionable weight or the scale does not zero

| External object interfering with

scale

| Remove the interfering object from the scale
Display did not show 0.0 before

weighing

| Help the patient off the scale, zero the scale and begin the weighing

process again

Scale is not level| Ensure the scale is level and begin the weighing process again
Scale is out of calibration| Check the weight with a known weight value
Displayed messages as detailed below.
STOP| The load on the scale exceeds

the capacity of the scale

| Remove excess weight and use the scale according to the

manufacturer’s specifications

LO Bat| The batteries are low| Replace the batteries
SAT| Damaged load cell cable

Possible wrong port

| Replace load cell cable

Check ports

E06| Identifier – ADC| AD too high
E07| AD too low
E10| Overload| Scale is overloaded; Remove load from scale
E4L|

BAT

| Battery low but still usable — 1 bar left on the indicator display
E4U| Battery low and unstable — no bars left on the indicator display
E11| CAL| Calibration Error — recalibrate the scale again
Err 2| Low saturation state (low A/D)| The load cell is not connected properly; Check the cables and mechan-

ical connections; If the problem persists, replace the set of load cells

Err 3| High saturation state (high A/D)| See Err 2
Err 6| Unstable weight

Cannot calibrate

| Check the load cells’ mechanical surroundings and ensure nothing

touches them and that the cables are properly welded

  Load Cell Replacement

Replacement load cells can be ordered from Rice Lake Weighing Systems. To replace a load cell, lift the scale with a chain and remove the foot and then remove the defective load cell. Disconnect the load cell cable from the junction box and cut the cable ties. When the cable is freed, pull the cable out of the scale frame channels.

Lay the replacement load cells near the corner they are to be installed. Thread the cable from each load cell through the conduit tubing in the frame and into the junction box according to the diagram in Figure 6-2.

Note that in Figure 6-2 both the scale and the junction box are viewed from the bottom. To verify correct load cell/ junction box terminal matching, see the numbers on the terminals inside the junction box and the corner numbering diagram.

Ensure the threaded holes for the load cell screws are free of debris. Use compressed air to blow out the holes, if necessary. Position the load cells with alignment arrows pointed up toward the deck and loosely install the provided hex head cap screws as shown in Figure 6-1 on page 24. If the base is used with an access ramp, position the load cell to maintain the dimension shown in Figure 6-3. Tighten all bolts to 75 ft-lb with the torque wrench.

Route the load cell cables near each corner so the cable is free from any possible contact with each foot. Hold the cable in position with the supplied adhesive-backed cable ties. Do not cut load cell cables. Coil extra cable before it enters the junction box, tie with cable ties and insert the coils into the channel near the junction box. After coiling the excess cable, pass each individual end of load cell cable through its grommet in the junction box cover (or through cable fittings in the NEMA Type 4X junction box). Corner correction trimming and calibration is necessary after load cell replacement. Follow the instructions in Section 6.4 on page 26.

Wiring Load Cell to Junction Box

The four load cells are wired to their respective terminals in the junction box according to the corner numbering system shown in Figure 6-4, and the coloring code in Table . Pull excess cable out of the junction box enclosure and tighten the cable grips with a wrench. To be watertight, the cable grips must be tightened to the point where the rubber sleeving begins to protrude out of the hub. Finally, pull on each of the four cables to ensure they do not slip.

Cable Color Code| __

J-Box Terminal

---|---
Red| +Excitation
Black| -Excitation
Green| +Signal
White| -Signal

Corner Correction/Trimming

The scale is delivered with the junction box corner-trimmed. Corner trimming is necessary after replacing a load cell. The output from each load cell must be matched by adjusting the signals with potentiometers at the junction box this process is known as trimming. Remove the junction box cover and identify the correct load cell terminal corresponding to each corner (labeled CELL 1, CELL 2, CELL 3, CELL 4). See Figure 6-4 on page 25 for scale deck corner numbering. The indicator must be connected and calibrated approximately, but it does not need to indicate the exact weight. A test weight is required; the recommended test weight is 25% of scale capacity. With no weight on the scale, zero the indicator. Then turn all four potentiometers (Figure 6-5) clockwise to increase the reading until a clicking sound is heard from each potentiometer. This ensures the maximum signal from each load cell.

With all potentiometers at full signal, place the test weight over one corner and record the indicated weight. Repeat the process for each of the other three corners. The load cell with the lowest corner reading is used as a reference point and will not be trimmed. Next, place the test weight over one of the other three corners and use that cell’s potentiometer to adjust the cell output down to the reference cell output. Repeat this procedure with the other two high corners. Adjustments are somewhat interactive, and adjusting the three higher outputs may affect the reference cell output, especially in smaller scale decks. Rezero the indicator and repeat the test until all corners read within ±.1% of the test weight used. The scale must be calibrated after the load cell trimming process is complete. See Section 4.4 on page 15

Specifications

Electrical Grounding

For systems where the scale is connected to a 115 VAC circuit, the indicator must be directly connected to an earth ground with

a ground interface cable of no more than 3W resistance throughout its length.

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.

Safe Static Overloading Capacity
Maximum: 150% of scale capacity

Dimensions
Scale (W X L X H) 36” X 36” X 3.0” (915 mm X 915 mm X 76 mm) Ramp (W X L) 36” X 28.5” (915mm X 724 mm)

Indicator Specifications Power
120 VAC-9VDC-50Hz / 230 VAC-9VDC-50Hz

Battery Type
AA Alkaline

Battery Use
25 hours of continuous use

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

Scale 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 notice with a detailed explanation of the alleged
• 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
• RLWS will have a reasonable time to repair or replace the defective equipment. The buyer is responsible for shipping charges both
• 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

These warranties exclude all other warranties, expressed or implied, including without limitation warran- ties 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 replace- ment of such goods. In accepting this warranty, the buyer waives any and all other claims to the 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 WEIGHING SYSTEMS • 230 WEST COLEMAN STREET • RICE LAKE, WISCONSIN 54868 • USA

References

• Rice Lake Weighing Systems
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• Firmware

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