For safe operation of the weighing indicator, please follow these
instructions:
● Calibration inspection and maintenance of the indicator are prohibited by non-pro-
fessional 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 inuence 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 balance while there is no load
● We suggest to warm-up the balance by powering on 5 minutes before use for
accurate weighing
● Calibration may be required before weighing when the balance is initially installed
or moved from a location
FEATURES
● Multiple weighing units: (kg/g/lb/oz/lb:oz)
● Gross/Tare/Zero
● Count weighing
● Accumulation weighing
● Overload / Underload indication
● Print
● Splash proof keyboard and display
● Can connect to a secondary large display/scoreboard
● Relay output (optional)
● 4-20mA analog output (optional)
● Can connect to a PC or printer for data logging (optional)
● Wireless capability (optional)
Indicator Model Options
The OP-900 series consists of the OP-900A (LED) series and OP-900B (LCD)
series. Options for rechargeable battery, stainless steel enclosure, computer connection,
relay output and analog output can be added.
Please contact sales@optimascale.com for a list of possible options.
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, 6 load cell of 350ohm max
● AC power: AC 100-250V (use only the included 9V adapter supplied)
● Operation temperature: -10 °C ~ +40 °C
● Operation humidity: ≤90%RH
● Storage temperature: -40 °C ~ +70 °C (32-104°F)
SPECIFICATIONS
FIGURE 1: INDICATOR MEASUREMENTS
POWER SUPPLY
AC Adapter
If the indicator is powered by an adapter, plug the adapter directly into the “DC” pin
located at the bottom of the indicator. We recommend to plug into a wall outlet to avoid
interference with other wirings.
Battery (Optional)
If you have an indicator with the rechargeable battery option, please charge the
internal battery fully before rst 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. 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.
On OP-900A
● 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
ON OP-900B
●
●
symbol will indicate battery’s charge
symbol indicates that the battery needs to be charged
OP-900A (LED)
OP 900B (LCD)
DISPLAY AND KEY DESCRIPTION
ON/OFF Powers the Indicator On or Off if held for 2 seconds
Hold1. Peak hold - Grabs the highest weight (for tension and pulling force)
2. Data hold - Holds the current weight value (ex. for use with weighing
moving animals)
TOTAL1. Accumulates weights
2. Works with “Print” to perform the accumulation function and check the
accumulation result
UNITSShifts between weighing units (kg/lb)
COUNTUse the scale to count product based on a sample weight
TARE1. Zero’s the scale. Used when using a container to hold objects
2. Clears the tare to see the gross weight
ZEROZero’s the scale
PRINTPrint data
The scale is at zero
The scale is stable
GrossShows you are in Gross weight mode (includes tare); default mode
NetShows you are in Net weight mode (without tare)
pcsShows you are in Counting mode
totalShows you are in Accumulation mode
holdShows you are in Hold mode
lbThe weight is shown in pounds
kgThe weight is shown in kilograms
batteryFlashes red = low battery, Solid red = charging, Green = fully charged
OverFlashes when weight is higher than set alarm parameter
AcceptFlashes when weight is within the set alarm parameters
UnderFlashes when weight is lower than set alarm parameter
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 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
● When indicator is turned on the screen should read 0
● If the screen reads any number other than 0 before weighing, press the ZERO key
to set to 0
Unit Selection
● To switch between measuring units (kg, lb, oz) press the UNITS key
Tare Function
● 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 sample to the scale to weigh without the weight of the container
● To exit Tare mode press the TARE key again to enter gross mode
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 for 2 seconds
● Input the tare weight using the arrow keys
● Press print key to conrm
and reset back to 0
Counting Function
● In weighing mode: Put a sample weight on the scale
● Then press the COUNT key to go to the counting mode (“pcs” will light up)
● It will then display the sample number (ex. PCS 0) which you can change using the
up or down arrows (Sample options are 5, 10, 20, 50, 100, 200, 500)
● Press the PRINT key to conrm your sample number
● The scale is now ready to start counting, load your product on the scale and the
indicator will show the quantity
● To exit counting mode press the COUNT key
● If you want to count a different product hold the PRINT and COUNT key together
and the sample pieces will reset back to zero
Accumulation
● In weighing mode load the rst weight, once stable press the ACCUM key to enter
the accumulation mode. The “total” light will display.
● Remove weight and press ZERO key before adding the second weight to the scale
● Once stable press ACCUM key to add the weight to the accumulated total
● Press ZERO Key before adding the next weight to the scale
● Repeat previous step 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 ACCUM
and PRINT key together. The accumulated number “n###” (the number of weights
you are adding together) will ash on the display followed by the total. The total will
display by ashing between 2 sets of numbers
● There are 8 digits in total, the display will ash 4 at a time, the rst 4 on the left and
the last 4 on the right. For example if the rst 4 digits are “0012” and the last 4 digits
are “3456” the actual weight is 001234.56 or 1234.56 lbs/kg
● If you want to print the accumulated total, hold the PRINT key while the last 4
digits of the total are shown
● To exit accumulation mode, wait for the last 4 digits to the right of the screen to
appear, and then press and hold the ACCUM key. “CLr n” will be displayed, asking you if
you want to keep the data?
● If NO you do not want to clear the accumulated total, then keep “CLr n”.
● If YES you do want to clear the accumulated total, then use the arrow key to change
to “CLr y”.
● Finally, press the PRINT key to select exit accumulation mode
Print
● 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
● In accumulation mode press the PRINT key when the last 4 digits of the total weight
are shown to print the total weight
Note: In tare mode the printer can not print if negative weight is shown
Hold
There are 2 different hold functions
Peak Hold: Grabs the highest weight
force)
Data Hold: Grabs the current weight and holds it so it will not change/uctuate (ex. for
use with weighing moving animals)
(for materials testing, such as tension and pulling
CALIBRATION PROCEDURE
1. 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 is low.)
2. Press the HOLD key and the PRINT key simultaneously to access the setup menu.
3. If done correctly, the display should now show C01.
4. Press the PRINT key to access the C1 channel. The display should show [C1 X].
5. Press the ZERO key to change the value of C1 to 2. (The value of 2 sets the scale
6. up in pounds.)
7. Press the PRINT key to set the value. The display will now show C02.
8. Press the PRINT key to access the C2 channel. The display should show [C2 X].
9. Press the ZERO key to change the setting to 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.)
10. Press the PRINT key to set the value. The display will now show C03.
11. Press the PRINT key to access the C3 channel. The display should show [C3 X].
12. Press the ZERO key to cycle through the values until the desired graduation appears.
(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.)
13. Press the PRINT key to set the value. The display will now show C04.
14. Press the PRINT key to access the C4 channel. The display will show [XXXXXX].
15. Enter in the maximum capacity you want to use for this scale by using the UNIT and
GROSS keys to move the cursor left and right, and the TARE and ZERO keys move
the values down and up. (The C4 channel is used to enter in the max capacity of the
scale; Make sure this doesn’t exceed the max capacity of the scale; Max capacity
divided by the increment set in C02 and C03 above cannot exceed 5000)
16. Press the PRINT key to set the value. The display will now show C05.
17. Press the PRINT key to access the C5 channel. The display should show [C5 0].
18. The C5 channel calibrates zero on the scale. Make sure the scale is empty.
19. Press the ZERO key to change the value to 1.
20. Press the PRINT key. The display will count down from 10 while the scale is calibrating zero. When the display shows 0 the zero calibration is complete.
21. Press the PRINT key to continue. The display will now show C06.
22. Press the PRINT key to access the C06 channel. The display will show [C6 0].
23. The C6 channel is used to calibrate the scale with a known weight. Press the ZERO
key to set the value of C6 to 1. Press the PRINT key. The display will ash SPAN, and
then show [XXXXXX].
24. Enter the calibration weight value you will use (at least 10% of max capacity you set
in C04 by using the UNIT and GROSS keys to move the cursor left and right, and the
TARE and ZERO keys move the values down and up.
25. Place the calibration weight you have on the empty scale and press the PRINT key.
26. The scale will count down from 10 to 0. Once 0 has been reached, the display will
show CALEnd.
27. Press the PRINT key to continue. The display will now show C07.
28. Press the ACCUM/TOTAL key to save and exit the setup menu.
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 000000.
32. If the scale does not display 00000, check that the feet on the platform are not
screwed in too tightly, and verify that the platform is level.
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 ofcial seal by opening the back of the indicator to
access the seal switch, you may need to have the indicator recertied. Be sure to adjust the seal
switch back to the original setting after calibration/conguration has been performed.
To enter calibration/parameter settings, follow the procedure below:
1. Press and hold the HOLD and PRINT key at the same time for 2 seconds
2. Navigate through the settings (C01 to C45) as shown in the table 4 below by using the arrow
keys and return keys as labeled under each indicator button
3. Press the PRINT
Press the ACCUM key to save and exit settings at any time
Table 1. Indicator Parameter Settings
key to enter/edit the parameter setting
FunctionParameter Settings/Options
Weighing UnitC011 = kg
2 = lb
3 = gram
4 = oz
Note: for calibration only kg or lb are allowed
Decimal SettingC020 = no decimal
1 = #.#
2 = #.##
3 = #.###
4 = #.####
Graduation Setting
(readability of the least
signicant digit)
Maximum CapacityC04set max capacity ex. 100kg = 0100.00
1 = set the zero calibration (Please ensure scale is empty and the
stable light is on)
1 = ready to calibrate with calibration weight
C070 = do not restore
1 = restore to default settings
FunctionParameter Settings/Options
Warning ToneC080 = turn off warning tone
1 = turn on warning tone
Automatic
Power Off
Power Saving ModeC10LED Version OP900A:
Hold FunctionC110 = turn off hold function
Unit ConversionC12* See table 2
Upper Limit AlarmC13Set upper limit within the max. capacity
Lower Limit AlarmC14Set lower limit within the max. capacity
Inner Code DisplayC15check the inner code (raw data)
Set DateC16Set date from left to right: month/day/year
Set TimeC17Set the time from left to right: hour/minute/second
Communication
Setting
C090 = turn off auto power off
10 = power off automatically if no change within 10 minutes
30 = power off automatically if no change within 30 minutes
60 = power off automatically if no change within 60 minutes
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
LCD Version OP900B:
0 = turn off the backlight
1 = backlight only when the weight changes or keyboard is pressed
2 = constant backlight
1 = Peak hold
2 = Data hold
3 = Reserved
Peak hold - Grabs the highest weight (for tension and pulling force)
Data hold - Holds the current weight value (ex. for use with
weighing moving animals)
C18Set the serial interface data output method:
0 = Turn off serial interface data output
1 = Continuous sending, connect big display
2 = Print method, connect printer
3 = Command request method, connect computer.
4 = PC continuous sending format, connect computer
5 = PC/big display, continuous sending format
6 = Print to adhesive label printer
Baud RateC19
0=1200
1=2400
2=4800
3=9600
Manual
Zero Range
C200 = turn off manually zero setting
1 = ±1% max capacity
2 = ±2% max capacity
4 = ±4% max capacity
10 = ±10% max capacity
20 = ±20% max capacity
100 = ±100% max capacity
FunctionParameter Settings/Options
Initial Zero RangeC210 = no initial zero setting
1 = ±1% max capacity
2 = ±2% max capacity
5 = ±5% max capacity
10 = ±10% max capacity
20 = ±20% max capacity
Zero TrackingC22
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
Zero Tracking TimeC230 = turn off zero tracking time
Bit 3printing=1
Bit 4Extend display=1
Bit 5Constant 1
Bit 6Constant 0
Computer Continuous Ouput Format (C18=2)
,,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 “-”
S4: “kg” or “lb”
Data: weight value, including decimal point
CR: carriage return
LF: line feed
{
{
Serial Command Mode (C18=3)
In this mode, the indicator can recieve ASCII commands as listed below
CommandNameFunction
TTareSave and clear tare
ZZeroZero gross weight
PPrintPrint the weight
RG.W/N.WRead gross weight or net weight
CKg/lbKg/lb conversion
GG.WCheck gross weight at net weight mode
The R command will trigger the indicator to output the followind data format:
<STX><POL>XXXXX.XX<SP><LB/KG><SP><GR/NT><CR><LF>
Start
Transmission
Polarity:
<SP> = Positive
“-” = Negative
Weight DataSpaceUnits:
lb = punt
kg = kilogram
pcs = pieces*
Space
Gross/Net:
GR = Gross
NT = Net
Carriage
Return
Line Feed
Print Format (C18 = 4)
ID.NO. 004 (Serial No.)
Date: XX.XX. XX (yy.mm.dd)
Time: XX.XX.XX (hh.mm.ss)
GROSS 8.88kg (gross weight)
TARE 2.88kg (tare)
NET 6.00kg (net weight)
PC or 2nd Display Continuous Format (C18=5)
<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
4-20 mA ANALOG OUTPUT (OPTIONAL)
The 4-20 mA analog output of the OP-900
scale is a voltage sourcing sensor that will
output current which is proportional to the
calibrated scale’s weight range (i.e. 4 mA = 0
LBS and 20 mA = 10,000 LBS). It is
important to note, that this is a sourcing
output sensor (i.e. the sensor will source
9VDC with an output current range of 4-20
mA). Unlike many other “loop powered” type 4-20 mA
sensors, an external supply voltage should not be connected
to the unit’s 4-20 mA circuit, however, the ground connection
(pin 6) of the DB-9 connector will need to be connected to
the same ground as the data acquisition device which will be
responsible for interoperating the 4-20 mA signal. This ground
connection is imperative, as both the data acquisition device’s
power supply and the scale’s internal 9VDC power supply will
need to be on the same ground plane for the output current to
FIGURE 6. CONNECTION DIAGRAM
be synced and measured correctly. Please reference Figure 6 as a visual clarication on
how to connect your scales 4-20 mA output to a data acquisition device.
Below is a list of important notes when using the indicator with the 4-20 mA option
● Resolution: 1/1000
● Outside Load: 100-350ohms
● Inside connection: load input port pin “1” of J2, ground port pin “GND” of J2
● Outside connection: load input port pin 1 of DB9, ground port pin 6 of DB9
● To test the connection, connect a 250 ohm load; Locate a volt meter, and probe
across the 250 ohm load. As the weight input to the indicator varies, the voltage of
the volt meter will change accordingly
● Pressing the TARE key will reset to output current to 4mA
● 0-20mA output can be set by setting parameter C31 to 0
● Please note that this option will disable the RS232 weigh data output (serial ASCII
data) that comes in the standard indicator
Calibration:
● Press PRINT and HOLD key to go into conguration mode
● Go to C32 and press PRINT key
● The display should show [out-4] and output should be at 4mA
● Press the up/down arrow keys and the [out-#] will increase/decrease
Note: X corresponds to the output current. For example if out-12 is displayed, then
12mA should be the output. If not, press the left and right arrow key to adjust/calibrate
RELAY OUTPUT (OPTIONAL)
● The indicator can output 4 signals, which when connected to outside equipment,
can perform an automatic control function and an upper/lower limit alarm function.
● Change parameter setting C33 following Table 6 below:
Table 6: Relay Output Parameter Setting
Output PortPort DenitionFunction
Out1Turn off output functionNo Output Signal
C33=0
C33=1
C33=2,3Preserved, no function
Out2Turn off output functionNo Output Signal
Out3Turn off output functionNo Output Signal
Out4Turn off output functionNo Output Signal
Out1Turn on overload control functionOutput overload control signal
Out2Turn on compliance control functionOutput compliance control signal
Out3Turn on under-load control functionOutput under-load control signal
Out4Turn on stable control functionOutput stable control signal
Table 7 below shows the DB9 port pinout for the relay output option. Please note that
this is optional and only available for the OP-900 indicator ordered with this option.
The relay output option will disable the RS232 weigh data output (serial ASCII data) that
comes in the standard indicator.
Table 7: Relay Output Pin Denition
DP9 PinDenitionPort
11st output signal pinOut1
st
61
22
72
33
83
44
94
output signal pinOut1
nd
output signal pinOut2
nd
output signal pinOut2
rd
output signal pinOut3
rd
output signal pinOut3
th
output signal pinOut4
th
output signal pinOut4
Error Codes
ErrorReasonSolution
UUUUUU
nnnnnnn
ERR1During calibration, weight is not used or
ERR2
ERR3During calibration, the input signal is
ERR4During calibration signal is unstableAfter the platform is stable, start calibration
ERR5EEPROM ErrorChange PCB
ERR6Exceed Zero RangeSee Q&A section
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
the weight is above the max. capacity
During calibration, the weight is below
the minimum required weight
negative
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 dened 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)
CONTACT US
Please e-mail sales@optimascale.com for any sales related question
Please e-mail support@optimascale.com for any support related questions
Don’t forget to visit our website at:
optimascale.com
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.