sellEton Scales com SL-7561 Portable Static Weighing Indicator User Manual

Calibration inspection and maintenance of the indicator are prohibited by non-professional staff
Please ensure that the indicator rests on a stable surface

The indicator is a piece of static sensitive equipment; Please cut off power during electrical connections
Touching the internal components by hand is prohibited

DO NOT exceed the rated load limit of the unit
DO NOT step on the unit

DO NOT jump on the scale
DO NOT use this product if any of the components are cracked

DO NOT use for purposes other then weight taking
To avoid damaging the battery do not keep charger plugged in once battery is fully charged

Make sure the weight is not over the Max capacity as it could damage the load cell inside
Material that has a static electric charge could influence the weighing. Discharge the static electricity of the samples, if possible. Another solution to the problem is to wipe both sides of the pan and the top of the case with an anti-static agent

Please take anti-static prevention measures
Any accumulated charge on the body of the human operator should be discharged first before opening the protective container with ESDS devices inside. The discharge can be accomplished by:

Putting a hand on a grounded surface or, ideally, by wearing a grounded Anti-static Wrist Strap and an Anti-static Mat

PREPARATION & SET UP

Plug into a wall outlet to avoid interference with other wirings
Turn on the indicator while there is no load

We suggest to warm-up the indicator by powering on 5 minutes before use for accurate weighing
Calibration may be required before weighing when the platform is initially installed or moved from a location

FEATURES

Designed to work with static axle scales
Gross weighing and accumulative weighing modes

LCD display (size: 5.3in x 1.4in)
Tare, Zero, Print, Save, Check, and Delete functions

Kg and lb weighing units
Built-in needle printer

Different printing formats
6v/4.5Ah Battery and 9v/1.2A adapter

Can connect to a secondary large display/scoreboard
Can connect with up to 4 weighing pads
Shows individual scale/pad percentage of the total weight
Manual and automatic printing modes
Date and time can be set easily
Can connect to a PC or printer for data logging
Wireless capability (optional)
Splash proof keyboard and display

TECHNICAL PARAMETERS

Sensitivity : 0.5μV/d
Input voltage: -30 to +30mV DC
Accuracy class : III
Initial zero range : ±10%Max
Manually zero range : ±2% Max
Zero Range : 100% Max
Zero Tracking : 0.5d/s
Excitation circuit : VDC,6 wire connection,Maximum connect 24 load cell of 350Ω
AC power: AC 100-250VAC,50/60HZ (use only the 9V adapter supplied)

Operation temperature : -10°C ~ +40°C
Operation humidity: ≤90%RH
Storage temperature : -10°C ~ +40°C

SPECIFICATIONS

FIGURE 1: INDICATOR MEASUREMENTS

POWER SUPPLY

Battery
Your indicator comes with a rechargeable battery, please charge the internal battery fully before first time use. A 110 to 220V AC adapter should be provided with your indicator. Please use only the AC adapter provided to prevent damage to your indicator.

When you use the internal battery for the first time,you should charge the battery fully, to prevent low voltage resulted from self leakage of battery
If the battery is not used for long time, remove to avoid leakage
To keep the battery in best condition, fully discharge the battery every month by leaving the indicator on until the indicator powers off, and then recharge fully

symbol will indicate the battery’s charge
symbol indicates that the battery needs to be charged

SL-7561 DISPLAY

DISPLAY AND KEY DESCRIPTION

ON/OFF	Powers the Indicator On or Off if held for 2 seconds
SWITCH	Switch the weight between the pad weight and the total weight
CHECK	Check and read the saved weight data to print
KG/LB	Shifts between weighing units (kg/lb)
TARE	1. Zero’s the scale. Used when using a container to hold objects 2. Clears the tare to see the gross weight
ZERO	Zero’s the scale
STORE	In accumulative weighing mode it accumulates the axle weight and prints the weight data
PRINT	1. Print data 2. Works with the switch button to enter the calibration menu
Total	Shows you are in Accumulation mode
	The scale is at zero
	The scale is stable
Net	Shows you are in Net weight mode (without tare)
Gross	Shows you are in Gross weight mode (includes tare); default mode
Tare	Shows you have tared the scale
	Indicates the charge of the battery
lb	The weight is shown in pounds
kg	The weight is shown in kilograms
	Shows the percentage of weight on the pad out of the total weight
LFW	The weight of the Left front wheel
RFW	The weight of the Right front wheel
LRW	The weight of the Left rear wheel
RRW	The weight of the Right rear wheel
	Power
	Back
	Save and Exit
	Arrow keys
	Return/Enter

OPERATING INSTRUCTIONS

Power On

Turn on the power by pressing the power button for 2 seconds. Once on, the scale will flash the voltage and then begin to auto-check and count down from 0-9 sequentially before entering the weighing mode
Note: Anything on the scale before powering on will automatically be tared out.

Zeroing

The zero function is used only when the scale is empty and is not at gross zero due to material build up
Pressing the ZERO key will reset your scale to 0
Depending on what your manual zero range parameter is set to, you can zero out any number within your set selection, after that you will receive an error and will need to tare out the weight

Unit Selection

To switch between measuring units (kg or lb) press the KG/LB key

Tare Function

The Tare function is used when you only wish to see the current change in weight, not the entire amount of weight that is on the scale
When the indicator is in normal gross mode pressing the TARE key will Tare the current weight on the scale and enter the net mode
To exit Tare mode press the TARE key again to enter gross mode

To use a pre-set tare weight

Press and hold the tare key for 2 seconds
Input the tare weight using the arrow keys

Press print key to confirm

Check

The check key is used check previously saved weights

In weighing mode, press CHECK key to show
ex. if there are 30 records saved it will display
If you wanted to check the 20th saved weight you would input and press PRINT to check the 20th record

The display will show . Choose “1” and press PRINT
The screen will flash the date, time, axle, tare weight and total weight one by one
Then the screen will show , enter “1” and press PRINT to print this record and go back to the Checking display

Press CHECK key again to exit and return to weighing mode

Switch

Switches the display between the total weight and each individual pad/scale weight

Individual pad display shows the percentage of that pads load, of the total weight

Print

If the weight on the scale is stable press the PRINT key to print the current weight

CALIBRATION PROCEDURE

Turn on the scale by holding the ON/OFF key. (If the scale does not turn on, plug in the ac adapter because the battery may be low.)
Once on hold SWITCH and PRINT key to enter the indicator settings mode
The display will show [] to indicate F1 settings mode, use the STORE key to change to

Press the PRINT key to select and enter the F2 settings mode
The display will read
Use the arrow keys to select which scale/pad you will be calibrating (1-4)

Press the PRINT key to select and enter the next setting
The display will read use the STORE key to change to
With nothing on the scale/pad press PRINT to Zero Calibrate, the indicator will count down from and enter the next parameter if no errors

The display will show use the STORE key to change to press the PRINT key to select and enter the calibration setting
Use the arrow keys to enter the weight of the calibration weight you will be using (calibration weight must be at least 40% of the scale/pads capacity)
Load the calibration weight on the pad/scale you are calibrating

Once stable press the PRINT key to calibrate
The indicator will count down from 9-0 and move on to the Save parameter
Press STORE to change to , then save your calibration by pressing PRINT

The indicator will display , Press CHECK to exit the settings mode and go back to the weighing mode
The display will show the value of the calibration weight on the scale
Unload the scale; the display should read

If no errors the scale has now been calibrated
Repeat process until all pads/scales have been calibrated and saved

INDICATOR PARAMETER SETTINGS

This indicator has 5 different setting modes, [F 1], [F 2], [F 3], [F 4] & [F 5].
Each mode changes different indicator parameters.

To enter calibration/parameter settings, follow the procedure below:

Press and hold the SWITCH and PRINT key at the same time for 2 seconds
Navigate through the setting modes (F1 to F5) by using the arrow keys and return keys as labeled under each indicator button

Press the PRINT key to enter/edit the parameter setting
Press the CHECK key to save and exit settings at any time

F 1 Menu
Setting working mode, unit, decimal, graduation, and capacity

Step	Parameter	Display	Settings/Options
	Enter F1 Menu
1	Mode		Choose how many weighing pad’s you’ll be using Options: 1/2/3/4
2	Unit		Choose default unit 0=kg 1=lb
3	Decimal setting		0 = no decimal 1 = #.# 2 = #.## 3 = #.### 4 = #.####
4	Graduation Setting (readability of the least significant digit)		Options: 1/2/4/10/20/50 Example with no decimal places (ie step 3=0) 1 = 1 lb 2 = 2 lb 5 = 5 lb 10 = 10 lb 20 = 20 lb 50 = 50 lb
5	Max Capacity		0 = do not change the max capacity 1= change the max capacity ex. If step 2=0 and step 3=2 when changing max capacity 0100.00 = 100kg Then press to save your settings

F 2 Menu
Setting the Choosing a pad to calibrate, zero calibration, loading calibration, and saving

Step	Parameter	Display	Settings/Options
	Enter F2 Menu
6	Pad Choice		Choose a pad/scale to calibrate Options: 1/2/3/4
7	Zero Calibration		0 = do not calibrate 1 = calibrate Note: when 1 is selected the indicator will count down from 9-0 and move on to the next setting
8	Calibration		When ready for calibration, setting the span tells the indicator the weight you will be calibrating the scale with 0 = do not set the span 1 = set the span Use the arrow keys to set your calibration weight and when done load your calibration weight to the scale Once stable press to calibrate The indicator will count down from 9-0 and move on to the Saving parameter (Select 1 and press print to save your calibration settings)
9	Save		0 = do not save calibration 1 = save calibration

F 3 Menu

Step	Parameter	Display	Settings/Options
	Enter F3 Menu
10	Axle Number		Set the number of axles (for use with accumulation mode)
11	Cargo Number		Set the cargo number
12	Printing Format		0 = No printing 1 = Normal printing format 2 = Accumulative printing format * See page 13 for examples
13	Printing Method		0 = Manual 1 = Automatic *Manual is recommended for the most precise results
14	Printing Coupon		Printing coupon numbers setting Options: 1/2/3
15	Baud Rate		Options: 1/2/3/4/5/6/7/8 0 = 600 1 = 1200 2 = 2400 3 = 4800 4 = 9600 5 = 19200 6 = 38400 7 = 57600 8 = 115200
16	Communication Settings		0 = Communication off 1 = Communication format 1 for PC 2 = Communication format 2 for second display (YAO HUA MODEL) 3 = Communication format 3 for second display (TOLEDO MODEL)

17	Automatic Power Off	00 = turn off auto power off 10 = power off automatically if no change within 10 min 30 = power off automatically if no change within 30 min 60 = power off automatically if no change within 60 min
18	Back Light	00 = Backlight on 10 = Backlight off after 10 seconds
19	Date Format	0 = year, month, day 1 = month, day , year 2 = day, month, year
20	Date	Set according to previous parameter
21	Time	Set using Military time

F 4 Menu

Step	Parameter	Display	Settings/Options
	Enter F4 Menu
22	Records		Set how many records/weights you want your indicator to store Max. the indicator can store is 2000 cps.
23	PCB		PCB version 1.0A
24	Software		Software version 1.00
25	LFW		Check the left front wheel ad code
26	RFW		Check the right front wheel ad code
27	LRW		Check the left back wheel ad code
28	RRW		Check the right back wheel ad code

F 5 Menu

Step	Parameter	Display	Settings/Options
	Enter F5 Menu
29	Delete Weighing Records		0 = Do not delete the weighing record 1 = Delete the weighing record
30	Delete All		0 = Do not delete all the records 1 = Delete all the records

WEIGHING/PRINTING MODES

In the Parameters you can set to have your printer print automatically or manually, we recommend setting to manual (F3 [PM – 0]) for best results.

Normal Weighing mode:

In the F3 menu set the Printing Format to “1”
In this mode you have the option of using 1-4 pads

Example : There are 3 weighing pads connected to the indicator to weigh an airplane.

The pads should connect with LFW,LRW,RRW interfaces
Parameter settings:
F1 Working Mode setting: “3”
F3 Printing Format setting: “1”

Drive the plane on the pads. You can press the “SWITCH” key to switch between displaying the total weight, and the weight of each pad, shown with the percentage of that pads load of the total weight

If [PM – 1] Printing and Saving will be done automatically once the load is stable
If [PM – 0] Press the “PRINT” key to print results

Accumulative weighing mode:

In the F3 menu set the printing format to “2”
In this mode you have the option of using 2 or 4 pads

The Print mode must be set to manual to function correctly
Drive axle on weighing pads
Press the “STORE” key to accumulate the axle’s weight and print the axle’s data

Repeat steps until all axles have been weighed
Then press the “PRINT” key to accumulate weights and print the total

Example: There are 2 weighing pads connected to the indicator to weigh a truck with three axles.

The pads should connect with LFW, RFW interfaces
Parameter settings:
F1 Working Mode setting: “2”
F3 Printing Format setting: “2”
F3 Printing Mode setting: “0”
F3 Axle Number setting: “3”

Measure spacing between tire sets in an axle and place weighing pads accordingly
Drive the first axle of the truck on the weighing pads. When stable press the “STORE” key to begin accumulation by storing the weight data and printing the first axle’s results
Drive the second axle of the truck on the weighing pads and when stable press the “STORE” key to accumulate and store the second weight data and print the second axle’s results

Drive the third axle of the truck on the weighing pads and when stable press the “STORE” key to accumulate and store the third weight data and print the third axle’s results
Then press the “PRINT” key to accumulate all three axle weights and print the total weight of the truck

PRINT FORMAT

Normal Printing Format

Single pad:
WEIGHTING REPORT
————————
NO. : 0575
Date: 2013-11-02
Time: 09:59:04
Vehicle:
Cargo:34
LFW: 429.0kg
—————-
Gross: 429.0kg
Operator:

Double pads:
WEIGHTING REPORT
————————
NO. : 0575
Date: 2013-11-02
Time: 09:59:04
Vehicle:
Cargo:34
LFW:429.0kg
RFW:413.5kg
Axle1:842.5kg
—————-
Gross: 842.5kg
Operator:

Three pads:
WEIGHTING REPORT
————————
NO. : 0575
Date: 2013-11-02
Time: 09:59:04
Vehicle:
Cargo:34
FW: 429.0kg
LRW: 319.0kg
RRW: 293.0kg
Axle2: 612.0kg
—————-
Gross: 1041.0kg
Operator:

Four pads:
WEIGHTING REPORT
————————
NO. : 0575
Date: 2013-11-02
Time: 09:59:04
Vehicle:
Cargo:34
LFW: 429.0kg
RFW: 413.5kg
Axle1: 842.5kg
LRW: 319.0kg
RRW: 293.0kg
Axle2: 612.0kg
——————Gross:
1454.5kg
Operator:

Accumulative Printing Format

Double pads:(Double axles)
WEIGHTING REPORT
——————————
NO. : 0594
Date: 2013-11-02
Time: 11:10:41
Vehicle:
Cargo:34
LW: 420.5kg
RW: 419.5kg
Axle01: 840.0kg
LW: 309.5kg
RW: 297.0kg
Axle02: 607.0kg
——————————
Gross: 1447.0kg
TOperator:

Four pads:(Four axles)
WEIGHTING REPORT
——————————
NO. : 0594
Date: 2013-11-02
Time: 11:10:41
Vehicle:
Cargo:34
LFW: 420.5kg
RFW: 419.5kg
Axle01: 840.0kg
LRW: 309.5kg
RRW: 297.0kg
Axle02: 607.0kg
LFW: 420.5kg
RFW: 419.5kg
Axle03: 840.0kg
LRW: 309.5kg
RRW: 297.0kg
Axle04: 607.0kg
—————————–Gross:
2894.0kg
Operator:

CONNECTORS

Connecting load cells to the indicator

SL-7561 can connect with 4 weighing pads or 24 pcs of load cells of 350Ω at most

QUICK DISCONNECT AS SHOWN BELOW:

The number of weighing pads and load cells corresponds to the weighing modes. If the pads or load cells are not connected properly the indicator will not function properly.
Please use the following table to connect your pads correctly.

INNER TERMINAL BLOCK CONNECTION DIAGRAM

Weighing Pad #	Load Cell Connection	Weighing Mode
1	LFW	[Mode 1] Setting “1”
2	LFW, RFW	[Mode 2] Setting “2”
3	LFW, LRW, RRW	[Mode 3] Setting “3”
4	LFW, RFW, LRW, RRW	[Mode 4] Setting “4”

DB9 Connection (9 pin Serial Connector)

Pin function and definition are bellow:

DB9 Pin	Definition	Function
2	TXT	Transmit Data
3	RXD	Receive Data
5	GND	Ground Interface

COMMUNICATION SETTINGS

Format 1 [CP – 1]
Workable with a PC
RS232COM serial interface can receive simple ASCII command.
RS232 parameter:9600Bit/S Baud rate,8 digits,no check point,1 stop.

S1: weight status, ST=standstill, US=not standstill, OL=overload
S2: weight mode, GS=gross mode, NT=net mode
S3: weight of positive and negative, “+” or “-”
S4: “kg” or “lb”
Data: weight value, including decimal point
CR: carriage return
LF: line feed

Format 2 [CP – 2]
Workable with second display from Yaohua, Baud rate 600.
Format 3 [CP – 3]
Workable with second display from Toledo, Baud rate 1200.

PRINTER

To Remove lid:
Remove lid by pressing on the lower corner tabs and squeezing while pulling outwards
To Replace Ink:
Remove lid, then squeeze and pull forward on the pull tabs to pull printer forward from indicator. Next hold ink cartridge on both sides and pull straight down. To replace, feed paper through the new ink cartridge, then align the small holes located on the left side of the ink cartridge with the gears located under the left pull tab. Push cartridge upwards into place and push printer backwards into the indicator and replace lid.
To Replace Paper:
Remove lid, then squeeze and pull forward on the pull tabs to pull printer forward from indicator. Carefully remove ink cartridge. If the paper roll is not empty use the feed button to empty the roll. Once roll is empty squeeze both sides of the roll holder and pull forward. Remove old roll from the roll holder and replace with a new paper roll. Squeeze both sides of the roll holder and replace back into the printer. Feed paper into the paper slot while holding the feed button. Then feed paper into the ink cartridge. Push cartridge upwards into place and push printer backwards into the indicator and replace lid.

TROUBLESHOOTING

Error Codes

Error	Reason	Solution
	1. Overload 2. Wrong connection with load cell 3. Load cell has quality problem	1. Reduce the weight 2. Check load cell connection 3. Inspect load cell; Check the input/output 4. See Q&A section
	1. Calibration is no good 2. Wrong connection with load cell 3. Load cell has quality problem	1. Make sure scale is level 2. Check load cell connection 3. Check load cell input and output resistance 4. See Q&A section
	During calibration, weight is not used or the weight is above the max. capacity	Use correct weight within the defined range
	During calibration, the weight is below the minimum required weight	The calibration weight minimum is 10% of the max. capacity set in C04. Recommended to use 60%-80% of max. capacity if possible
	During calibration, the input signal is negative	1. Check all wire connections 2. Check load cell 3. Recalibrate 4. PCB replacement needed if steps 1-3 fail
	During calibration signal is unstable	After the platform is stable, start calibration
	EEPROM Error	Change PCB
	Exceed Zero Range	See Q&A section
	Scale was not stable when Zeroed	Wait for the scale to stabilize before zeroing
	Zero function can not be used in Tare mode	Go back to gross weighing, by pressing Tare then you can Zero
	Out of the zero range	Move the extra load
	Scale wasn’t stable when Tared	Tare once the load is stable
	Tared without a load	Add your load, then tare
	Out of tare range	Decrease the tare weight
	The record you are trying to check does not exist	Assure the record you are trying to check exists
	Printing format wrong in accumulative weighing mode	Set Printing format to setting “2”
	Working mode wrong in accumulative weighing mode	Set Working mode setting to either “2 or 4”
	You are weighing over max. capacity or you tried to print while the scale was unstable	Reduce weight on the scale Print after scale has stabilized
	Display Error, Printing with the indicator in accumulative weighing mode	Print the total weight after accumulating the weight of axles
	Printing error in normal Weighing mode	Wait for the load to be stable, then print
	Printing format wrong in normal weighing mode	Set Printing format to Setting “1”

CONTACT US
Please e-mail info@selletonscales.com for any sales related questions or
call 844-735-5386
Don’t forget to visit our website at:
www.selletonscales.com

Documents / Resources

sellEton Scales com SL-7561 Portable Static Weighing Indicator [pdf] User Manual
SL-7561, SL-7561 Portable Static Weighing Indicator, Portable Static Weighing Indicator, Static Weighing Indicator, Weighing Indicator, Indicator

References

User Manual

SAFETY PRECAUTIONS