Optima Scale OP-905 User Manual

Download

OP-905 INDICATOR

USER’S MANUAL

optimascale.com

TABLE OF CONTENTS

Safety Precautions 1

Preparations and Set Up 1

Features 2

Specications 3

Power Supply 4

Displays 5

Display and Key Descriptions 6

Operating Instructions 7-9

Calibration 10

Indicator Parameter Settings 12-16

Helpful Denitions 17

Connectors 18-19

RS232 Serial Output Format 20-23

4-20 mA Analog Output 24

Relay Output 25

Troubleshooting 26

Q&A 27

SAFETY PRECAUTIONS

For safe operation of the weighing indicator, please follow these instructions:

● 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 inuence 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 rst

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

● Calibration may be required before weighing when the scale is initially installed or

moved from a location

FEATURES

Suitable for Bench scales, oor scales and truck scales, this indicator works with 32bit CPU and 24bit high precision ADC. It is made with a Stainless Steel housing. Excellent

performance make it proper for varied interface function. Waterproof connector and

cable connection xed inside.

● Multiple weighing units: (lb/kg)

● Gross/Tare/Pre-Set Tare/Zero

● Multiple Hold functions

● Count weighing

● Accumulation weighing

● Check weighing

● Overload / Underload indication

● Connects to printer

● Splash proof keyboard and display

● Connects to a Remote Display/Scoreboard

● Power saving mode

● Can connect to a PC or printer for data logging (optional)

● Wireless capability (optional)

● 20 mm Letter LED display

● Rechargeable battery

● RS232 output

Technical Parameters

● Accuracy class: 5000 e

● Resolution - Display: 30,000 ; ADC: 2,000,000

● Zero stability error: TK0 < 0.1μV//K

● Span stability error: TKspn < ± 6 ppm//K

● Sensitivity (internal): 0.3 μV / d

● Input voltage: -30 to +30mV DC

● Excitation circuit: 5 VDC, 4 wire connection, 12 load cell of 350ohm max

● AC power: AC 110V

● Battery 6V4Ah

● Operation temperature: -10 °C ~ +40 °C

● Operation humidity: ≤85%RH

● Storage temperature: -40 °C ~ +70 °C (32-104°F)

● Weight: 7lbs (3.2kg)

● Dimensions: 11.25” x 4” x 9.5” (260x160x80mm)

zero

10.25”

Net

Gross

Unit

Hold

Total Del

Tare

Zero

Hold Total

SPECIFICATIONS

FIGURE 1: INDICATOR MEASUREMENTS

OP-905

Check

Count

Set

pcs

Esc

ON/OFF

Battery

2 3

3.25”

6.25”

9.5”

11.25” 4”

1.77”

3.14”

5.11”

POWER SUPPLY

AC Adapter

We recommend to plug into a wall outlet to avoid interference with other wirings.

Battery

Please charge the internal battery fully before rst time use. 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. If the battery is not going to be used for a

long period of time it is recommended to remove it to avoid leakage.

● When the Battery is low the battery indicator light ashes red

● During charging the red light will stay lit

● The light will turn green once fully charged

Keypad and Display

MODEL OP-905

Gross Net Hold Total

HOLD UNIT CHECK PRINT

TOTAL DEL COUNT ESC

OP-905 (LED)

Pcs

Battery

OVER

UNDER

CLASS III

1 2 3

4 5 6

7 8 9

TARE ZERO SET

ON/OFF

Cap. _______x D_____

DISPLAY AND KEY DESCRIPTION

HOLD

UNIT

CHECK

TOTAL

DEL

COUNT

ESC

TARE

ZERO

Holds the weight on the scale Depending on the parameter setting

Shifts between weighing units

Checking the record by number

Print the weighing data

In gross mode: get the tare weight In net mode: clear the tare, get the Gross

Delete the previous weighing data and the saved record

Use the scale to count product based on a sample weight

Back to weighing

1. Zero’s the scale. Used when using a container to hold objects

2. Clears the tare to see the gross weight Zero’s the scale

SET

ON/OFF

Conrm the action

Powers the Indicator On or Off if held for 2 seconds

Clear the input

Conrm the input

The scale is at zero

The scale is stable

Gross Shows you are in Gross weight mode (includes tare); default mode Net Shows you are in Net weight mode (weight without tared weight) Hold Shows you are in Hold mode Total Shows you are in Accumulation mode Pcs Shows you are in Counting mode LB The weight is shown in pounds KG The weight is shown in kilograms Battery Flashes red = low battery, Solid red = charging, Green = fully charged Over Flashes when weight is higher than set alarm parameter Accept Flashes when weight is within the set alarm parameters Under Flashes when weight is lower than set alarm parameter

OPERATING INSTRUCTIONS

Power On

● Turn on the power by pressing the ON/OFF button for 2 seconds. Once on, the scale will ash 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 zero due to material build up

● Pressing the ZERO key while the scale is stable will reset your scale to 0

● Depending on what your manual zero range parameter is set to, you can zero out any weight 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/lb) press the UNITS key

Tare Function

To Tare: When in gross mode, press TARE to enter net mode and tare out the weight

TARE

● 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 gross mode (gross light is shown) pressing the TARE key will Tare the current weight on the scale and enter the net mode (net light shown)

● For example if you are using a container add the container to the scale, press tare and the display will show the tare symbol

● Add your product to the scale to weigh without the weight of the container

● To exit Tare mode press the TARE key again to enter gross mode and you will see the total weight of the container and the product

and reset back to 0

Note: If you remove the container the scale will show the minus weight of the container

To use a pre-set tare weight

● Press and hold the TARE key and SET key at the same time

● Input the weight you want tared on the keypad

● Press TARE key to conrm

● Press TARE to reset back to 0

Accumulation

● The accumulated function is used to add multiple weights and total them together

● You can add up to 999 different weights together

● In weighing mode load the rst weight, once stable press the TOTAL key to enter the accumulated mode. The “total” light will display

TOTAL

● Remove the rst weight and add the second weight to the scale

● Once stable press TOTAL key to add the weight to the

● Repeat previous steps until all desired weights have been added to the total (max 999

times)

● When you are done and want to display the accumulated total, press the TOTAL and

SET key together. The accumulated number “

are adding together) will ash on the display followed by the total

###” (the number of weights you

accumulated total

TOTAL

TOTAL SET

● If you want to print the accumulated total, hold the PRINT key for one second

● To exit accumulated mode, press the ESC key

● To delete the saved weights press the DEL key followed by the set key to conrm

DEL

● Repete this process to cleaer all saved weights

SET

● If the indicator is connected to a printer and the weight on the scale is stable press the PRINT key to print the current weight

Note: In tare mode the printer can not print if negative weight is shown

Counting Function

● The counting function is used to count a high volume of identical parts. You can do this by setting a sample and then either adding to the sample or taking away from the sample to count the number of objects on the scale

● In weighing mode: press COUNT to enter count mode

● Then press COUNT and SET at the same time to set your sample with the keypad

COUNT

● (ex. If you are counting pencils, you would add a sample of pencils to the scale, if you add 50 pencils to the scale you would enter 50 on the keypad.)

● Press

● The scale is now ready to start counting, load your product on the scale and the

indicator will show the quantity

on the keypad to set your sample

SETCOUNT

+ 450 pencils

● (ex. if you add 450 pencils to your sample of 50, the scale will read 500 pencils)

● To see the weight on the scale press COUNT

● To exit counting mode press the ESC key

● If you want to count a different product hold the COUNT and SET keys together to

enter a new sample

Hold

There are 4 different hold functions you can choose from in the C11 parameter

1. Peak Hold: Grabs the highest weight

force)

● Press the HOLD key then add weight to the scale

● The indicator will show the highest weight it recorded and hold it on the screen until

(for materials testing, ie. tension and pulling

a higher weight is placed on the scale

2. Manual Hold: Grabs the current weight and holds it so it will not change/uctuate

● While weighing, press HOLD and the indicator will hold the current weight on the screen until HOLD is pressed again

3. Auto Hold: If the weight on the scale is above 20d (20 x division) and is stable, the indicator will hold that weight on the screen for 3 seconds then go back to general

weighing

● Pressing the hold key is unnecessary, holding is done automatically when the scale is stable

4. Average Hold: Used for animal weighing, the indicator will display the average

weight sampled from 3 seconds

Recipes

Recipes allows you to store formulas for different products you may continuously be weighing, and creates a quick easy way to streamline your weighing.

For example: If you are selling 2 lb bags of cherries, you would create a recipe by setting a tolerance using upper and lower limits. This tolerance allows you to quickly separate multiple 2 lb bags of cherries. For this example we are going to use a tolerance of 0.1 lbs. Meaning we would set our upper limit to 2.10 lbs and our lower limit as 1.90 lbs. We are telling the scale, that any weight taken out of the container between 1.9 lbs - 2.1 lbs is acceptable, anything higher or lower is not. Now that our recipe is set add your large container of cherries on the scale. Then tare out your container of cherries, setting the scale to 0. Now if you start scooping out cherries from the container into a bag, the scale will read in negative (ex. -1.5 lbs) until the amount set in our recipe is reached. When you have taken out ~2 lbs (what your tolerance is set to) the scale will reset back to 0. Then the process can be repeated again, take out ~2 lbs of cherries until the scale reads 0.

To set these formulas:

1. Press SET, the screen will show what recipe number you are on, the default is 1. If it

is not on 1, use the keypad to enter the recipe number you would like to set. (up to 99 recipes can be saved)

2. Press # to conrm that number

3. You will now be back in weighing mode the screen will show 0

4. Press SET and ESC at the same time to enter the settings mode

5. use the keypad to input 13 followed by # to conrm

6. Use the keypad to enter your Upper Limit, followed by # to conrm (ex. 2.10)

7. The screen will show C14, press # to enter this setting

8. Use the keypad to enter your Lower Limit, followed by the # key to conrm (ex. 1.90)

9. The screen will show C15, press ESC to save and return to weighing mode

10. Then place your container on the scale, The screen will show you the total weight

11. Press TARE to set the scale back to 0

12. After pressing tare you are able to remove product from the scale until you are within

your set tolerance and the scale reads 0. (ex. 1.9 - 2.1 lbs)

To use already set formulas:

1. In weighing mode, press SET, followed by the number the recipe is saved under

2. Press # to conrm

3. Add your product to the scale, Then press TARE

4. You can now start removing product and the scale will read 0 when its within the set

tolerance

5. To change recipes, press SET followed by the number the recipe is saved under

CALIBRATION PROCEDURE

1. Turn on the scale by holding ON/OFF .

2. Press

3. If done correctly, the display should now show

4. Press

5. On they keypad enter which unit you want to calibrate in (1 = kg, 2 = lb).

6. Press

7. Press

8. Use the keypad enter the setting for the decimal places desired (The C2 channel is

used to adjust the decimal point on the scale. A value of 1 means there is one digit

behind the decimal point 1= 0.0, a value of 2 = 0.00)

9. On they keypad set your value. The display will now show

10. Press

11. On they keypad enter the value of your desired graduation.

(The C3 channel adjusts the divisions on the scale. A value of 1 selected and C2 set

to 1, the scale will read in 0.1 lb. increments.)

12. Press

SET

# #

and

to access the C1 channel. The display should show [

to save your value. The display will now show

to access the C2 channel. The display should show [

to access the C3 channel. The display should show [

to set your value. The display will now show

ESC

together to access the setup menu.

C01

C02

C03

]

13. Press

14. On they keypad enter the maximum capacity you want to use for your scale.

(The C4 channel is used to enter in the max capacity of the scale; Make sure the

number you enter does not exceed the max capacity of your scale.)

15. Press

16. Press

17. The C5 channel calibrates zero on the scale. Make sure the scale is empty.

18. Press 1 on the keypad to change the value to 1.

19. Press

calibrating. When the display shows 0 the zero calibration is complete.

20. Press

21. Press

22. The C6 channel is used to calibrate the scale with a known weight. Press 1 on the

keypad to set the value of C6 to

23. Press

to access the C4 channel. The display will show [

to set your value. The display will now show

to access the C5 channel. The display should show [

to zero calibrate. The display will count down from 10-1 while the scale is

to to continue. The display will now show

to access the C06 channel. The display will show [

[

C06 01

to to continue. The display will ash

SPAN

, and then show [

000000

C05 00

C06 00

000000

24. On the keypad enter the weight of the calibration weight you will use

(must be at least 10% of your max capacity you set in C04.

25. Place your calibration weight on the empty scale and

CALIBRATION CONT.

26. The scale will count down from 10 to 0. Once 0 has been reached, the display will

show

27. Press

28. Press

29. The scale has now been calibrated. The display will show the value of the calibration

weight on the scale.

30. If the scale does not show the value of the calibration weight, check that the feet on

the platform are not screwed in too tightly, and verify that the platform is level.

31. Unload the scale; the display should read

32. If the scale does not display 000000, check that the feet on the platform are not

screwed in too tightly, and verify that the platform is level.

CALEnd

to continue. The display will now show

ESC

to save and exit the setup menu.

000000

INDICATOR PARAMETER SETTINGS

The parameter settings menu has a calibration section (C01 to C07 explained above) and a

parameter settings section (C08 and up).

To access the calibration section the seal switch (located at one corner of the PCB) must be

OFF. This will allow access to all C01 and up settings. If the seal switch is ON, then only C08 and up

can be accessed by the user. If you break the ofcial seal by opening the back of the indicator to

access the seal switch, you may need to have the indicator recertied. Be sure to adjust the seal

switch back to the original setting after calibration/conguration has been performed.

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

1. Press and hold the SET and ESC key at the same time to enter the parameter settings

2. Navigate through the settings (C01 to C45) by using the number keypad

3. Press the

key to enter/edit the parameter setting

Press the

ESC

key to save and exit settings at any time

Table 1. Indicator Parameter Settings

Function Parameter Settings/Options

Weighing Unit

Decimal Setting

Graduation Setting (readability of the least

signicant digit)

Maximum Capacity

C01 C02

C03

1 = kg 2 = lb

0 = no decimal 1 = #.# 2 = #.## 3 = #.### 4 = #.####

options: 1/2/4/10/20/50 Example with no decimal places (ie C02=0) 1 = 1 lb 2 = 2 lb 5 = 5 lb 10 = 10 lb 20 = 20 lb 50 = 50 lb

set max capacity ex. 100kg = 0100.00

C04

Zero Calibration

Calibration

Restore Default Settings

C05

C06 C07

0 = zero calibration not needed 1 = set the zero calibration (Please ensure scale is empty and the

stable light is on)

0 = calibration not needed 1 = ready to calibrate with calibration weight

0 = do not restore 1 = restore to default settings

Function Parameter Settings/Options

Hold Function

Unit Switch

Power Saving Mode

Automatic Power Off

Alarm Setting

Upper Limit Alarm

C08

C09 C10

C11

C12

0 = turn off hold function 1 = Peak hold - Grabs the highest weight 2 = Manual hold - Grabs the current weight 3 = Auto hold - Automatically holds data when stable 4 = Average hold - for animal weighing, averages the weight from a sample of 3 seconds 5 = Auto Average hold - Average hold without the need to press the

hold key

0 = turn off unit switch 1 = turn on unit switch

0 = turn off power saving setting 3 = turn off display if no change within 3 minutes 5 = turn off display if no change within 5 minutes

0 = turn off auto power off 1 = power off automatically if no change within 10 minutes 2 = power off automatically if no change within 20 minutes 3 = power off automatically if no change within 30 minutes 4 = power off automatically if no change within 40 minutes 5 = power off automatically if no change within 50 minutes 6 = power off automatically if no change within 60 minutes

0 = turn off alarm 1 = turn on alarm

Set upper limit within the max. capacity

C13

Lower Limit Alarm

Set lower limit within the max. capacity

C14

Inner Code Display

check the inner code (raw data)

C15

Preserved menu

C16

Preserved menu

C17

Communication

Setting for the RS232

Port

Preserved menu

C18

Set the serial interface data output method:

0 = Turn off serial interface data output 1 = Command request mode, connect computer. 2 = Print mode, connect printer 3 = Continuous sending mode, connect computer or display

C19

Manual Zero Range

Initial Zero Range

C20

C21

0 = turn off manually zero setting 1 = ±1% max capacity 2 = ±2% max capacity 4 = ±4% max capacity

0 = no initial zero setting 1 = ±1% max capacity 2 = ±2% max capacity 5 = ±5% max capacity 10 = ±10% max capacity 20 = ±20% max capacity

Function Parameter Settings/Options

Zero Tracking

C22

Zero Tracking Time

C23

Overload Range

C24

0= turn off zero tracking

0.5 = ±0.5d d = division

1.0 = ±1.0d

2.0 = ±2.0d

3.0 = ±3.0d

4.0 = ±4.0d

5.0 = ±5.0d

Note: the zero tracking range can not be bigger than manual zero range

0 = turn off zero tracking time 1 = 1 second 2 = 2 seconds 3 = 3 seconds

00 = turn off overload range 01-99d = overload range setting d = division

Negative Display

Standstill Time

Standstill Range

Digital Filter (for ltering moving

weight such as animals)

Noise Filter

Communication Format

Baud Rate

C25

C26

C27

C28

C29

C41

C42

0 = -9d 10 = -10% max. capacity 20 = -20% max. capacity

0 = quick 1 = medium 2 = slow

1 = 1d d = division 2 = 2d 5 = 5d 10 = 10d

0 = turn off dynamic lter 1 = 1 digital lter strength 2 = 2 digital lter strength 3 = 3 digital lter strength 4 = 4 digital lter strength 5 = 5 digital lter strength 6 = 6 digital lter strength Note: The higher the number, the higher the lter strength

0 = turn off noise lter 1 = 1 digital lter strength 2 = 2 digital lter strength 3 = 3 digital lter strength

0 = turn off continuous transmit 1 = format 1 2 = format 2 3 = format 3 4 = format 4

0 = 600 1 = 1200 2 = 2400 3 = 4800 4 = 9600 5 = 19200 6 = 38400 7 = 57600 8 = 115200

Function Parameter Settings/Options

Odd-Even Check

Interval

Checksum

Simple Command Support

Commanding Format

Baud Rate

Odd-Even Check

Response Format

Slave ID

C43

C44

C45 C46 C51

C52

C53

C54

0 = 8n 1 = 70 2 = 7e

0 = no limit 1 = 100ms 2 = 200ms 3 = 500ms 4 = 1s 5 = stable transmit

0 = no 1 = yes

0 = turn off commanding mode 1 = simple commanding 2 = standard commanding

0 = 600 1 = 1200 2 = 2400 3 = 4800 4 = 9600 5 = 19200 6 = 38400 7 = 57600 8 = 115200

0 = 8n 1 = 70 2 = 7e

0 = format 1 1 = format 5 2 = format 4

0-99

C55

Print Mode

C61

Baud Rate

C62

0 = turn off printing mode 1 = turn on printing mode

0 = 600 1 = 1200 2 = 2400 3 = 4800 4 = 9600 5 = 19200 6 = 38400 7 = 57600 8 = 115200

Table 3. Default Parameter Settings

Function Parameter Default

Weighing Unit

Decimal Setting

Graduation Setting

Maximum Capacity

Zero Calibration

Calibration

Restore Default

Hold Function

Unit Switch

Power Saving Mode

Automatic Power Off

Alarm Setting

Upper Limit Alarm

Lower Limit Alarm

Inner Code Display

Communication Setting

Manual Zero Range

Initial Zero Range

Zero Tracking

Zero Tracking Time

Overload Range

Negative Display

Standstill Time

Standstill Range

Digital Filter

Noise Filter

Communication Format

Baud Rate

Odd-Even Check

Interval

Checksum

Simple Command

Commanding Format

Baud Rate

Odd-Even Check

Response Format

Slave ID

Print Mode

Baud Rate

C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C18 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C41 C42 C43 C44 C45 C46 C51 C52 C53 C54 C55 C61 C62

10000

000000

999999

0.5

BATTERY INSTALLATION

The indicator works with AC power, please note the voltage is proper and check if the AC power side is earthing. Voltage transformer and stable circuit is build in the indiciator please dont open it without professional instruction.

Stable Circuit connection

J1 Inditial level for AC power input and voltage transfomer J2 Second level for voltage transformer F1 220V 0.25A fuse

PCB indicator power connection

Postive battery connect with BAT+ , negative batter connect with BAT-

SCALE INSTALLATION

OP-905 maxi. Supports 12 x 350ohm load cells. (4 wires or 6 wires load cell) The connection between load cells and indicator is by terminal block. the connection diagram as below.

4 Wire load cell connection

EXC+, EXC-, SIG+, SIG- (load cell) to EXC+, EXC-, SIG+, SIG- (indicator) EXC+ and SEN+ to be short circuit EXC- and SEN+ to be short circuit

6 Wire load cell connection

EXC+,SEN+, SEN-, EXC-,SIG+,SIG- (load cell) to EXC+,SEN+, SEN-, EXC-,SIG+,SIG-

(indicator)

Communication Interference

OP-905 owns 3pcs RS232 , 1 pc RS485 and 1 pc USB-Com. 1 RS232 is electrical isolation with load cell and can be set in C18 parameter, DEFAULT

off.

RS485 and USB-COM are electrical isolation too. The communication function is set in C41 ~ C79 parameter.

RS 232 connection as below.

USB-COM as below RS485 as below.

PIN Denition Interface Function

RX1 RS232-1 recieve

TX1 RS232-1 transmit

GND Earthing

RX2 RS232-1 recieve

TX2 RS232-1 transmit

GND Earthing

8X3 RS232-1 recieve

TX3 RS232-1 transmit

GND Earthing

A RS485 output A

B RS485 output B

USBV+ USB power

D- Data-

D+ Data+

RS232-1 Continues Tranmit

RS232-2 Printing

C18:

RS232-3

Electrical

Isolation

RS485

Electrical isolation

USB to COM

Electrical isolation

Commanding mode

Printing mode

Continues transmit mode

Commanding mode

GND USB earthing

OUTPUT FORMAT

Computer Continuous Sending Mode (Format 1)

, , CR LF

{

S 1 S 2 S 3 Data S 4

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 “-”

Data: weight value, including decimal point

S4: “kg” or “lb”

CR: carriage return

LF: line feed

{

RS232 SERIAL OUTPUT FORMAT

Follow the pin out of Table 5 below to connect the indicator the RS-232 Serial device

Table 5. DB9 Pin Description

DB9 Pin Denition Function

2 TXT Transmit Data

3 RXD Receive Data

5 GND Ground Interface

The serial output format depends on the settings for parameter C18. The serial output

consists of a string of ASCII characters. Here is a list of the serial parameters

● 8 data bits

● 1 stop bits

● No parity

● No handshaking

Note: With the RS232 Output option we have data logging software available as seen in Figure 5.

FIGURE 5. DATA LOGGING SOFTWARE

Below are the formats of the serial output

● C18=0 - Turn off serial interface data output

● C18=1 - Continuous sending mode, connect 2nd big display

● C18=2 - Print mode, connect printer

● C18=3 - Command request mode, connect computer.

● C18=4 - PC continuous sending mode, connect computer

● C18=5 - PC/big display, continuous sending mode

● C18=6 - Print to adhesive label printer

Compatible for Yaohua A9 (Format 3)

ASCII code to show the data. The transmission data is the current weight. Each one is by 12 groups of data.

X bit Note

1 2 3

: :

9 10 11 12

02(XON) start + or - symbol

High bit of weighing data Weighing data: Weighing data:

Low bit of weighing data Decimal bits from right to left(0~4) Odd or even checking for high 4 bits Odd or even checking for low 4 bits 03(XOFF) end

PC or Remote Display Continuous Sending Mode (Format 4)

<STX> <POL> XXXXX.XX <L/K> <G/N> <STAT> <CR> <LF>

Start Transmission

Polarity:

<SP> = Positive “-” = Negative

Weight Data

Units:

lb = punt kg = kilogram pcs = pieces*

Gross/Net:

GR = Gross NT = Net

Carriage

Status:

<SP> = Valid M = Motion O = Over/under range

Return

Line Feed

PC or Remote Display Continuous Sending Mode (Format 5)

<STX> <POL> XXXXX.XX <sp> <Lb/KG> <sp> <GR/NT> <CR> <LF>

Start Transmission

Weight Data

Polarity:

<SP> = Positive “-” = Negative

Space

Units:

lb = punt kg = kilogram pcs = pieces*

Space

Gross/Net:

GR = Gross NT = Net

Carriage Return

Line Feed

Commanding Format

Standard comand

Use ASCII code to response

Transmit:

Format STX ADDRESS COMMAND VERIFY ETX

Content 02 A-Z / 20 A-F,T,Z 3H 3L 03

No address, use space (20hex), 6 bits in total.

Responsing:

Format STX ADDRESS COMMAND REPLY VERIFY ETX

Content 02 A-Z / 20 B-D (W) 3H 3L 03

Content 02 A-Z / 20 A,T,Z,N,X 3H 3L 03

W: symbol+weight+decimal position Back 6/14 bit

Command list: A: shaking hand B: gross weight C: tare weight D: net weight T: tare Z: zero

N: command can’t be done

X: Non commanding

Simple commanding:

Code Name Function

T Tare Reduce tare or clear tare

Z Zero Tare to be zero

P Printing Print the current weight

R Read gross/net weight Response to format 1

Note:

If set salve ID is not 0, transmit with ID.

PRINTING

The following are the printing formats on an optima ticket printer:

Standard Printing mode

S/N: XXX

Date: 05/01/2017 Time: 11:30:52 Net 25.6lb Tare 10.3lb

Gross 35.9lb

Accumulation Printing mode

Date: 05/01/2017 Time: 11:30:52 N001: 25.6lb N002: 10.3lb

Total 35.9lb Count 002

Counting Printing mode

Date: 05/01/2017 Time: 11:30:52

Pieces xxxxxx pcs APW xxxx.xx kg

Net: 25.6lb Tare: 10.3lb Gross: 35.9lb

Checking Printing mode

Date: 05/01/2017 Time: 11:30:52 Number 231 Weight 10.3kg

HELPFUL DEFINITIONS

Division: The amount of increments a scale offers. How accurate the scale can be

Capacity: the maximum amount the scale can contain

Initial Zero Range: The percentage of weight allowed on the scale when indicator is powered

on that will automatically zero.

example: If initial zero range is set to 10% of the max. capacity and your max. capacity is 100lbs, you can place up to 10lbs of weight on the scale and when the indicator is powered on, it

will automatically zero out the weight.

Manual Zero Range: The percentage of weight allowed on the scale where the indicator will let you manually zero (anything above this percent will be tared)

Zero Tracking Range: A subset to the manual zero range; if the weight on the scale is not stable, the zero tracking range still allows you to zero within a set division of the scale

Zero Tracking Time: A subset to the zero tracking range, it is the time allowed for the

scale to fall within the zero tracking range tolerance and still qualify to be zero’d

Overload Range: Weight allowance that is out of the set calibrated range. Adds a tolerance to the calibrated max. capacity without having to recalibrate.

example: If your scale has a max. capacity of 1000lbs with a division of 1 and you set the overload range to 60, you can add 1060lbs of weight to the scale without it

displaying an error code

Negative Display: How far you can go in the negative direction before displaying an error code

Standstill Time: How fast the scale will stabilize

Standstill Range: How much the scale can uctuate before being determined stable

Digital Filter: For ltering moving weight, such as animals, It changes how sensitive

the scale is to variations in movement.

Noise Filter: A lter for how susceptible the scale is to general variations

Baud Rate: The rate at which information is transferred in a communication channel.

example: In the serial port context, “9600 baud” means that the serial port is capable of transferring a maximum of 9600 bits per second.

Error Codes

Error Reason Solution

UUUUUU

nnnnnnn

ERR1

ERR2

ERR3

ERR4 ERR5 ERR6 ERR9

ERR10

TROUBLESHOOTING

1. Overload

2. Wrong connection with load cell

3. Load cell has quality problem

1. Calibration is no good

2. Wrong connection with load cell

3. Load cell has quality problem

During calibration, weight is not used or the weight is above the max. capacity

During calibration, the weight is below the minimum required weight

During calibration, the input signal is negative

During calibration signal is unstable After the platform is stable, start calibration

EEPROM Error Change PCB

Exceed Zero Range Remove the load and See Q&A section

The number to chick is too big Input again with proper number

No information The accumulation is empty

1. Reduce the weight

2. Check load cell connection

3. Inspect load cell; Check the input/output

4. See Q&A section

1. Make sure scale is level

2. Check load cell connection

3. Check load cell input and output resistance

4. See Q&A section Use correct weight within the dened range

The calibration weight minimum is 10% of the max. capacity set in C04. Recommended to use 60%-80% of max.

capacity if possible

1. Check all wire connections

2. Check load cell

3. Recalibrate

4. PCB replacement needed if steps 1-3 fail

Q&A

Q: The scale does not turn on

A: Make sure the power cord is plugged in, and that there is power. One easy way to

test this is by connecting another appliance to the same outlet and see if it’s operational

Q: The reading goes negative when a load is applied

A: Try interchanging the Sig+ and Sig- wiring connected to the load cell and/or

junction box (if one is used)

Q: How do I resolve ERR6 error?

A: Please follow the procedure below:

1) Turn on the indicator and make sure nothing is on the scale, and that the scale

is level and not wobbling

2) Press and hold the “PRINT and HOLD” key simultaneously for a few of seconds

3) The screen will read “C01”

4) Using the arrow keys, change C01 to C20. You have to change the 1st digit from 0 to 2 rst before you can change the 2nd digit 1 to a 0.

5) Press “PRINT” key to enter C20 parameter

6) Change the value of C20 on the right to 100 if possible using the up arrow key. If 100 is not available change to 20

7) Press “PRINT” key to enter your selection

8) The screen will read “C21” now

9) Press “PRINT” key to enter C21 parameter

10) Change the value on the right of C21 to 100 if available, 20 if not

11) Press “PRINT” key to enter your selection

12) he screen will read “C22” now

13) Press “TOTAL” key to save and exit

14) Power the indicator off and then on, and see if this resolves the ERR 6 issue. If not, then following the Q&A answers below for resolving “nnnnnn”and “uuuuuu”

errors Q: How do I resolve “nnnnnn” and “uuuuuu” error? A: 1) Check to see if the cable that runs from the indicator to the junction box is

damaged. If it is, replace the cable.

2) Open up the junction box (if available) and check to see if there is any water

damage. If so, replace the junction box

3) Make sure all the wires on all 5 terminal blocks (5 wires on each terminal block)

are not loose. Re-tighten the screws even if the wires seem to be connected

4) Recalibrate

5) If steps 1-4 do not work, there is a possibility one or more load cells are

defective (consult with support@optimascale.com for further instructions)

Please e-mail sales@optimascale.com for any sales related questions.

Please e-mail support@optimascale.com for any support related questions.

Don’t forget to visit our website at:

optimascale.com

Optima Scale OP-905 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual