Inscale LP-7510 User manual

LP7510
Weighing indicator
USER MANUAL
Edition:2012-03-19

Safety Instruction
For safety operation pls. follow the safety instruction.
WARNING
Setting. Calibration Inspection and Maintain of the indicator is
prohibited by Non-professional staff.
WARNING
Pls. make sure the weighing display have good ground in using
WARNING
The indicator is the static and sensitive equipment,
cut off the power during electrical connections,
internal components touched by hand is prohibited,
and please take the measure of anti-static.

LIST
1. Instruction ..........................................................................................................1
1.1 Main function...........................................................................................1
1.2 technical parameter ...............................................................................1
1.3 Outline（mm）.....................................................................................2
1.4 Battery instruction....................................................................................2
2.Installation and calibration..................................................................................3
2.1 Power supply connection .........................................................................3
2.2 Connection of load cell and indicator.......................................................3
2.3 Communication interface.........................................................................4
2.4 4-20mA output .........................................................................................5
3. Basic operation...................................................................................................9
3.1 keypad......................................................................................................9
3.2 Power on & off....................................................................................... 11
3.3 Zero operation........................................................................................ 11
3.4 Tare operation.........................................................................................12
3.5 Accumulation operation .........................................................................12
3.6 Print........................................................................................................13
3.7 Hold........................................................................................................13
3.8 COUNT..................................................................................................13
4. Calibration and Parameter setting ....................................................................14
4.1 Enter setting ...........................................................................................14
4.2. Step of calibration operation .................................................................15
4.3 Application function parameters setting chart........................................17
5. Output format...................................................................................................22
5.1 Second display continuous sending format............................................22
5.2 Computer continuous sending format ....................................................23
5.3 Serial interface reception command：...................................................23
5.4 Print format ............................................................................................24
5.5 PC or Second display continuous sending format..................................25
6. Maintenance.....................................................................................................26
6.1 Regular error and solution......................................................................26
6.2 Daily maintain........................................................................................27
6.3 Restore default parameter.......................................................................27
6.4 Packing list.............................................................................................29

1
1. Instruction
This weighing indicator is designed for bench scale, floor scale, the basic
weighing function include: Hold, Print, kg/lb conversion. Optional: I/O, 4-20mA
output.
1.1 Main function
Weighing function:
Zero, tare, accumulation. printing, animal weighing.
kg/lb convert. Overload remind.
Print format: Date, Time, Net,Tare,Gross
Options:
Pinter
RS232/RS485
I/O
4-20mA
1.2 technical parameter
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 -30~30mV DC
Excitation circuit 5 VDC, 4 wire connection,
Maximum connect 6 load cell of 350Ω
AC power AC100~250V
Operation temperature - 10 °C ~ + 40 °C
Operation humidity ≤90%RH
Storage temperature - 40 °C ~ + 70 °C

2
1.3 Outline（mm）
L
O
CO S
C
LP7510 Weighing Indicator
Hi
ok
Lo
Gross Net Tared Total Hold pcs kg Battery
ON
OFF Total Gount Gross Tare Zero Print
Class Capacity= d=
kg/lb
LP7510WeighingIndicator
Hi
ok
Lo
GrossNetTaredTotalHoldpcskgBattery
ON
OFFTotalGountGrossTareZeroPrint
kg/lb
ClassCapacity=d=
1.4 Battery instruction
1. when you use the internal battery first time，you should charge
the battery fully, to prevent low voltage resulted from self leakage
of battery.
2. when the “red” light flash means low battery, pls. charge it in
time
3. the light turns to red during charging
4. when the light turns to green, means fully charged.
5. if battery is not used for long time, take it out to avoid the
leakage.
6. In order to keep the battery in best using condition, it is suggest

3
that you fully discharge the battery every month, the method is that
using the indicator till it is automatically power off.
2.Installation and calibration
2.1 Power supply connection
The indicator is powered by adapter, you plug the adapter directly into
the “DC” pin at the back cover the indicator is ok.
2.2 Connection of load cell and indicator
The indicator can connect with 6 load cell of 350Ωat most, 4 wire or 6
wire load cell both ok.
There are two methods connection between load cell and indicator
A. quick disconnect, as below:
B. Terminal trip connection (inner connection)
1. the exciting voltage for the load cell is 5VDC, the largest output
current 120mA, maximum connect 6 pcs 350Ωload cell;
2. Load cell (or the signal cable for the junction box) is connected
with 5 bit
Terminal trip ( SENSOR) on the circuit-board of weighing indicator.

4
3. Open Weighing indicator back cover, insert signal cable to the
terminal trip(SENSOR), and make sure the screw is fixed tightly, the
connection as below:
Weighing display Load cell
+EXC +voltage
+SIG + output signal
HD ----------- Shielded wire
-SIG -outputsignal
+EXC+SIG HD - SIG -EXC -EXC - voltage
2.3 Communication interface
RS232 : DB9 Pin or 3 Pin
DB9 definition
5 4 3 2 1
9 8 7 6
Pin function and definition as bellows:
DB9 joint Definition Function
2 TXD Sending data
3 RXD Receiving data
5 GND Ground interface
Note: if RS485, The connection pin is 2 and 5 pin.

5
3 Pin definition
Inner connection
TXD RXD GND A B
Pin definitions：
Pins Definitions Function
RS232
TXD Sending data
RXD Receiving data
GND Ground
RS485
A RS485 output “A”port
B RS485 output”B”port
2.4 4-20mA output
Technical parameters:
Resolutions: 1/1000
Outside Load: 100-350Ω
Connection:

6
1. Inside connection: 4-20mA, load input port connect with “I” of J602, Ground
port connect with “ GND” of J602
2. Outside connection: 4-20mA, load input port connect with “1” pin of DB9,
Ground port connect with “6” pin of DB9
Testing :
Connect the 250Ωto the 4-20mA, adjust the multimeter to the current stalls, the
red pan connect the loading port, and the black pan connect” GND” to test the
output current.
Calibration:
1. Press” Print” and “ Total” go to C32, show[out-4], the output current should be
4mA.
2. If Press [↑]show[out-5]，Pres[↓]show[out-20]，the output current should be
20mA.
3. Adjust the current, for example, adjust to [out-20], Press [←](“Zero”
key)or[→](Net/gross key)to adjust the current
Function instruction:
4~20mA correspond to Zero ~Max. capacity. After press” TARE”, the weight will
start from 4mA. SET C31=0, 0~20mA output mode.; C31=1 4~20mA output mode.
If you need 0~5V output, Set C31=0, Then connect 250Ωat the two ends of
current output., will get 5voltage at resistance two ends
Relay output signal function
The indicator can output 4 signal , connect with the outside equipment
the indicator can perform automatic control function and upper limit
and lower limit alarm function. Perform the 4 kinds function through
setting C33, 4 signals
As below
Output
port Port definition Function
C33＝0 Out1 Close output function No output signal
Out2 Close output function No output signal

7
Out3 Close output function No output signal
Out4 Close output function No output signal
C33＝1
Out1 Open overload control function Output overload
control signal
Out2 Open compliance control function Output compliance
control signal
Out3 Open underload control function Output underload
control signal
Out4 Open stable control function Output stable control
signal
C33＝2
Out1 Weight>=C13 instant connection Feeding control
signal
Out2 Weight<=C14 instant connection Feeding control
signal
Out3 OUT1、OUT2 close When OUT1、OUT2
connect will output
alarm signal,
connect with buzzer
Out4 Weight<=C14 constant
connection
Weight>=C13 disconnect
Feeding start and
stop
C33＝3 Preserved, no function.
For example:
Check weigher application. Connect indicator with yellow, green, red 3
lights. Yellow light on when overload, if ok the green light on. If
underload red light on. And can connect with buzzer. There would be
alarm remind when overload.
C33=2 Feeding control application
For hopper scales. The target is between is 50~500kg, the Output
card can perform open and close feeding valve.
Parameter setting C13=500kg C14=50kg
C13=500kg upper limit , close feeding valve
C14=50kg lower limit, open feeding valve.

8
Connection: 1. Connect directly control machine, pls. connect OUT 4,
suggest connect another manually switch as the stop switch in
emergency
2. indicator output signal will influence the ON/OFF switch to control
machine, OUT 2 ON, OUT 1 OFF, OUT 3 connect buzzer, alarm
remind when start and stop.
Instruction: when the weight over 500kg, OUT 1 OU3 instant
connection and break off, OUT 4 break off; when weight under
50kg, OUT 2 OUT3 instant connection and break off, OUT 4
constant connection
5 4 3 2 1
9 8 7 6
DB9 pin definition port
1 pin 1st output signal pin Out1
6 pin 1st output signal pin Out1
2 pin 2nd output signal pin Out2
7 pin 2nd output signal pin Out2
3 pin 3rd output signal pin Out3
8 pin 3rd output signal pin Out3
4 pin 4th output signal pin Out4
9 pin 4th output signal pin Out4
Inner connection pin definitions
1A 1B 2A 2B 3A 3B 4A 4B

9
3. Basic operation
3.1 keypad
LED instruction
Weighing data
kg kg
lb lb

10
Hold Data hold
Gross Gross weight
Net Net weight
Tare tare
The weighing data is stable
Weight is zero
Hi Overload
OK ok
Lo Underload
. Decimal
PCS Show the counting status.
TOTAL Go to accumulation mode
Keys function
keys Key name Key function
Print Print
Zero Zero the weight within tolerance
Tare
At G.W mode, get the tare weight. At N.W
mode, clear the tare, get the G.W
Gross weight
At N.W mode, check the G.W, after 3
seconds back to N.W automatically

11
Counting
Counting operation
Kg/lb convert Covert between kg and lb
Accumulation
1. Accumulation
2. work together with “ Print” to perform
The accumulation function and check the
accumulation result
Power on/off
Press 2 seconds to power on or power off
3.2 Power on & off
Press 2 seconds to power on or power off, after power on the
indicator show”000000-999999”. After self inspection. It go to the weighing
mode. Pls. check it whether 6 bits LED/LCD display and the status light is
good or not.
3.3 Zero operation
1. Initial zero setting
When power on the indicator, if the weight on the scale is within the
initial zero tolerance, indicator show zero automatically.
2. Manually Zero setting
When the scales is stable, and not the negative display, you can zero
the weight within tolerance by press keys.

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3.4 Tare operation
Press “TARE” key, the gross weight is tared, indicator show the Net
weight, the “Net” “tared” status light is on. At tare mode, Press” TARE”
key, clear the tare weight, the indicator will show the gross weight.
3.5 Accumulation operation
At Zero mode, load weight till stable, Press go to accumulation
mode, ”Total” light on, display” n 001”, and then display loaded weight; unload
the weight , back to zero, load the second weight again till stable. Press
display”n002” then display the second loaded weight. Repeat it agin
and again, maximum 999 times.
Check the accumulation
Press “ON/OFF “key and hold it then press “TOTAL”” key, display ”n**”, (it is
the accumulating times) then show total weight. there are 8 digits totally. It
shows the first 4 digits then the last 4 digits. For example, the first 4 digits
is”0012”, the last 4 digits is”34,56” It means the actual weight is “1234.56”
EXIT the accumulation function
When the indicator show the last 4 digits, Press hold it, the
indicator show “ clr n”, it means don’t clear the total Weight, Press “PRINT”
key to exit it; if you want to clear total weight, Press “ZERO” or “TARE” key,
“clrn” change to “clry” it means clear total weight ,then Press “PRINT” to clear
the total weight and exit accumulating mode.

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3.6 Print
If the weighing is stable, after connect with printer, press” PRINT”
can print the weight. Note: at tare mode, print with tare. if negative
weight,, can not print. Set C30 for time format.
3.7 Hold
There are two different hold function. Peak hold function and data hold
function. And the setting is different accordingly.
C11=3 Automatic hold function C11=0 close hold function.
3.8 COUNT
1.At weighing mode, load the weights on the platform scales, Press”
Count” the indicator show” PCS 0” press” Zero” key input the quantity,
press” Print” to confirm it
2 . Load the goods on the platform scales, then the indicator will show
the quantity.
3. Press” Count” back to weighing mode.
4. If you want to weigh different goods, at weighing mode, put the
sample on the platform scales, press” Count” the indicator show”0”
Press “ Count” hold it and then press “ ON/OFF” the indicator show”
PCS 0”, press “Zero” input the sample quantity, press “ Print” to
confirm it. Then repeat the step 2 and 3.

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4. Calibration and Parameter
setting
4.1 Enter setting
There have two methods to enter the setting menu:
1. Put the switch “MARK” to “On” position, enter calibration
And when calibration is finish. Put the switch “ MARK” to “off” position.
Then add the sealing screw at the back of indicator.
2. when the switch “ MARK” is on position, press the “ ” hold it
and then press” ” enter calibration.
The key functions in setting：
ENTER
UP
DOWN
LEFT
RIGHT
BACK
EXITCALIBRATION
POWER

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4.2. Step of calibration operation
According to the second method which can enter setting menu,
C01-C39
step Method of operation display Remark
1 [C01 ] After you enter calibration mode,
it display [C01 ]
2 press [C01 1] Weight unit
option：1=kg
2=lb
3 press
press
press or
[C02 ]
[C02 0]
[C02 2]
Set decimal digits
option：0/1/2/3/4
Select decimal digit
example：two decimal point：
[C02 2]
4 press
press
press or
[C03 ]
[C03 1]
[C03 5]
Set graduation
option：1/2/5/10/20/50
Select required graduation
example：graduation 5：[C03 5]
5 press
press
press or /
[C04 ]
[0100.00]
[0100.00]
Max capacity
example：max weighing 100kg:
[0100.00]
6
press
press
press
press
[C05 ]
[C05 0]
[C05 1]
[CAL 9]
。。。。。。
[0000.00]
Zero calibration
Option
0=no need zero calibration
1=need zero calibration
calibration zero please choose 1 and
ensure scale is empty and “stable”
light is on
Ensure zero calibration, countdown.
Till show[0.00](example for two
decimal point)。

16
7 press
press
press or
press
press or
press
[C06 ]
[C06 0]
[C06 1]
[SPAN ]
[0100.00]
[0080.00]
[CAL 9]
……
[0080.00]
[CAL End]
calibration
option:
0=No need calibration
1= need calibration
Load weights on scales
according to max. capacity.
Suggest close to the max
capacity, at least 10% of max.
capacity.
For example: the weights is
80kg
As bellows:
Input the 0080.00, count down ,
then indicator shows 0080.00 ,
calibration is over.
If you want to set application
function parameter. Press
“PRINT” if you want to exit
press “COUNT”
8
press
press
press or
[C07 ]
[07 0]
[07 1]
Default parameters setting
option:0=non-restore default
parameters
1=restore default parameters
Note: after the above
parameters setting finish, please
do not set default parameters to
avoid the original setting
parameters is lost.

17
4.3 Application function parameters setting chart
Function Setting
Item parameters setting and instruction
warning
tone
C08
warning
tone
Options: 0 = close warning tone
1 = open warning tone
Automatic
power off
C09
Automatic
power off
option：0=close auto power off
10= power off automatically if no
change within 10 minute.
30= power off automatically if no
change within 30 minute.
60= power off automatically if no
change within 60 minute.
Power saving
setting
C10
Power saving
setting
LED Version:
option：0= close power saving setting
3= close display if no change within 3min.
5= close display if no change within 5 min.
LCD Version:
0=Close he backlight
1= backlight when the weight change or
press the keyboard
2=constant backlight
Hold
function
C11
Hold mode
option：0=close hold function
1=Peak hold /2=Data Hold
Instruction:
Peak-hold: it shows the maximum. data,
mainly application for materials testing,
such as tension and pulling force.
Date-hold: it shows current weight value.
Mainly application for animal weighing.
Kg/lb
conversion
C12
Kg/lb
conversion
C12=0 stop kg/lb conversion
C12=1 kg/lb conversion is ok