KeLi D2002E User manual

Keli Electric Manufacturing ( Ningbo ) Co., Ltd
Digital Load Cell and Indicator (D2002E)
User Manual
Date: January 2006
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Contents
Chapter 1 Brief Introduction
1. Basic Operating Principle of Digital Load Cell
2. Principle of Digital Indicator
3. Features and characteristics
4. Digital Load Cell and Indicator communication format
Chapter 2 Technical Specification
1. Digital Load Cell Technical Guide Line
2. Technical Guide line of Weight Display
Chapter 3 Installation & Connection
1. Front & Back view of Indicator
2. Connection between Load cell and Indicator
3. Connection between Printer and Indicator
4. Connection between Display Screen and Indictor
5. Serial interface
Chapter 4 Look over INS (internal statement number) of load cell
Chapter 5 Corner Adjustment
1. Manual Corner Adjustment
2. Automatic Corner Adjustment
Chapter 6 Calibration
Chapter 7 Adjust the address of load cell
Chapter 8 Setting of Scale’s Linearity Adjustment
Chapter 9 Installation & Debugging
1. Installation of Scale platform & Load Cell
2. Indicator’s data Setup
3. Platform Installation & Adjustment
4. Four Corner Adjustment
5. Calibration
Chapter 10 Operation
1. Start-up & Automatic-zero setting at start-up
2. Manual Zero setting
3. Tare deduction operation
4. Date & Time Setup and operation
5. Data Record Storage

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6. Weight Data Delete
7. Daily Record Print
8. Caution
Chapter 11 Malfunction & Troubleshooting
Chapter 12 Maintenance & Related Notice

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Chapter 1 Brief Introduction
1. Basic Operating Principle of Digital Load Cell
Digital Load cell system is a brand new electronic weighing appliance developed from the
traditional strain gauge sensor by using modern micro-electronics technology and
micro-computer integration.
It includes two parts, analogue load cell (strain gauge) and digital converter module.
Converter module is a high-integrated electronic circuit and adopts SMT on the surface. It
mainly includes amplifier, A/D converter, microprocessor ( CPU), memorizer ( EEPROM
calibration memory), interface circuit (RS485 ) and digital temperature load cell.
2. Principle of Digital Indicator
Indicator communicates with digital load cell through the RS485 Interface, and
independent connection is up to 32 load cells. Standard functions are available:
manual/automatic Corner adjustment, addressing and reading data from the individual load
cell automatically, adjusting load cell serial number automatically. It is available for data
processing such display, calibration, send, store, print and so on.
3. Features and Characteristics
A. High Precision, High Reliability
High-integrated electronic circuit and digital solution to error compensation, managing
software is used for the integrated compensation of linearity, zero, rated output,
temperature floating, creep error. It greatly avoids the error caused by using analog
compensation and human negative factors. So it enhances the precision and reliability
greatly.
B. Consistency & Interchangeability
Generally the consistency error of the analog load cell is ≤0.1%. the digital one is
≤0.02% and even more precise. The characteristics and parameter can keep the same in
mass production. Both make it works interchangeably. To replace one digital load cell
in the scale of III grade won’t affect its measuring performance.
C. Good long term stability, great anti-interference ability
It adopts integrated A/D converter, digital signal transmission, and digital filter
technology, increase the signal transmission ability. Signal can be transmitted 1200
meters away. It greatly enhances the anti-interference ability. The analog value
transmitting distance inside the load cell is supper short, meanwhile the elastomer itself
is a good shield cover; these two characteristics make it with high anti-interference
ability. Therefore it improves the load cell long term stability greatly.
D. Self-distinguish and Malfunction diagnosing easily
The digital load cell has the functions of automatic data collecting, pre-processing,
memorizing and storing, and has the exclusive mark. After multi load cells compose
one scale, it can inspect the status of each load cell individually, so the malfunction

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diagnosing is easy.
E. High flexibility
All communication via standard communication interface RS485. It is connected to PC
directly or other standard industrial mastering bus. It is easy to use and build the scale.
F. High security, to avoid cheat function
It can prevent remote controller cheating. Be alarming in case of cheating.
4. Digital load cell and indicator communication mode
Communication: 9600 Baud rate, serial interface RS485
Data format instruction: binary code,

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Chapter 2 Technical Specification
1. Technical specification of load cell
1. Data Conversion Rate: 10~200 measurements per second
2. Data transmission rate: 9600~38400BPS
3. Digital module A/D count: 10M counts
4. Resolution: 60000 counts
5. Digital module Zero point Temperature Coefficient: <±0.002%F.S/10℃
6. Digital module Sensitivity Temperature Coefficient: <±0.002%F.S/10℃
7. Load cell creep(30min): < ±0.02% F.S.
8. Load cell Temperature Coefficient: <±0.01%F.S/10℃
9. Combined error: <±0.02% F.S
10. Operating temperature of digital module: -40℃-80℃
11. Load cell number: 1-16
12. Zero point output: <±0.1% F.S
13. Safe overload: 150%F.S.
14. Protection: IP68
15. Recommended excitation: 9-12V ( DC)
16. Maximum excitation: 25V ( DC)
17. Maximum signal transmission distance: 1200 meter
2. Technical specification of display terminals
1. performance coefficient
Calibration zero adjustment: ±100%F.S
Zero setting range: power on: ±4% ±10% ±20% ±40% ±100%F.S (optional)
zero setting key: ±1% ±2% ±4% ±10% ±20%F.S (optional)
Automatic zero tracing range: 0.1-9.9d, optional, factory setting 1.0d
Weighing range: -100%F.S-+100% F.S. + 9d
Unit: T, KG, G
Overloading alarm: F.S.+9d
Non-linearity: <0.01% F.S
Plus drift: <6ppm/℃
Zero drift: <10 ppm
Calibration: manual set by key
Linearity adjustment, automatic Corner adjustment and automatic adjust the number of
the load cell on the spot,
2. Display : 6 digits VFD weighing display ( 0.8inch high ), 6 tactile keys
Display range: -9999-999999 excluding the decimal point
Division: 1-99, 99 classes optional, two ranges can be set

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Decimal point: three digits decimal point optional
3. communication port: All photoelectricity isolation, direct connection to computer
and display screen
Display screen communication: RS232 & 20Ma electric current loop
selectable. In case of individual connection, address number is able to be changed.
4. Print interface: standard 25 pin parallel interface
5. Keyboard
Number keyboard: 0-9
Function keyboard: 20 key
Material: tactile keyboard
6. Clock
Show in below format: yy/mm/dd, hh/min/sec, automatic adjustment for leap year &
leap month. Automatic Data saving and precision: ±5s/24h
7. Data storage: 256 printing records; 256 groups. Saving the data >50000h when
power off
8. Requirements
Power supply: AC 200-240V, 49Hz-51Hz
Operation temperature: -10-60
Storage temperature: -25-55
Humidity: ≤90%RH
Warm-up time: 15 min
Fuse: 500mA
Caution: The AC power to this indicator must be earthed reliably

Chapter 3 Installation & Connection
1. Front & Back view of Indicator
1 2 3
CARGO VEHICLE CALIBRATION CHECK DATE
4 5 6
MEMORY PRINT FORM PRINT ENTER TIME
7 8 9
Preset Tare WEIGH Memory Tare
0
Amend Code ZERO ON/OFF
F1
Deduct Tare
Manua
Corner-Rectify
Linearity
Correction
Auto
Corner-rectify
Supplementary
Print
Unit：kg
AUTO DATE TIME CONST TARE ZERO
(Chart 2-1) Front view of Indicator
Fuse
Power Load cell input RS232 Printoutput
Calibrationsocketanddisplayoutput
（Name plate）
（9 pins）（15 pins）（25 pins）
（Chart 2-2）Back View
2. Connection between Load cell and indicator
Load cell adopts 9 pins RS232 Terminal. Please refer to chart 2-3 for detailed
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information
To make sure the load cell and the indicator are connected effectively. The shielding
conductor should be put to earth. The conductor is not allowed to be plugged in or out
when the indicator is power on to avoid damage to the load cell and indicator caused
by the static electricity.
Load cell and indicator are sensitive to static electricity. So it is not allowed to process
electric welding and other electric related activity on the platform. In the thunder
storm, please make sure the inductor is connected to the earth safely to avoid damage
caused by the thunder.
Display Loadcell
Shield +E Red⑥
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⑤④③②① ⑨-E Black
⑨⑧⑦⑥
⑦A Green
-E B A +E B White⑧
Shield
（Chart 2-3）Load cell connection
3. Connection between printer and indicator
a) The print interface adopts standard parallel output. The terminal is 25 pins RS232.
Please refer to the chart 2-4 for the detailed information.
ST DO D1 D2 D3 D4 D5 D6 D7 BUSY
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
Signal earth

（Chart 2-4）Printer interface signal
b) Notice of Print
i. Please set up function before operation.
ii. Make sure the indicator and printer have been connected with matched wire in a
right way. Otherwise it will damage the indicator and printer terminals or
equipment.
iii. Before printing, firstly connect the printer and indicator in right way, secondly
power on the indicator then printer. After using, please power off the printer first,
then indicator, at last put off the wire.
iv. Various printers have different function, so choose one that match the indicator.
Please use the one we recommended which is available under DOS system such as
Canton BJC255SP, Panasonic KX-P1121 and so on.
v. Signal ground of the printer is not allowed to connect power ground. Otherwise
damage occurs.
4. Connection between Display Screen and Indictor
Make sure the indicator and display terminal have been connected with matched wire in a
right way. Otherwise it will damage the indicator and display terminals, even equipments.
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1. The display terminal adopts 25 pins RS232 port (share the same port with PC serial
interface and calibration). Please refer to the chart 2-5 for the detailed information.
PC（1,2）Control 1 Control 2 Control 3 Control 4 ?
TXD GND GND
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15
OUT+ OUT- TXD
Display terminal ( 9,10: electric current loop mode; 3,11: RS232 mode )
Chart 2-5
2. Display signal: RS232 mode or 20mA electric ring loop mode, binary system inline
output, baudrate 600 baud. 11 digits per group,
3. When display signal output, the indicator will show the weighing data which is
synchronous to VFD. And the indicator light turns on automatically to show that they
are connected in a right way. One group data contains 3 frames of data. Please refer to
the chart for the detailed information.
First frame：

1
0
Bit 0 1 2 3 4 5 6 7 8 9 10
d0 d1 d2 d3 d4 d5 d6 d7
X Y
G16 G17
（Chart 2-6.1）First frame oscillogram
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Second frame：
1
0
Bit 0 1 2 3 4 5 6 7 8 9 10
d0 d1 d2 d3 d4 d5 d6 d7
G8 —————— G15
（Chart 2-6.2）Second frame oscillogram
Third frame：
1
0
Bit 0 1 2 3 4 5 6 7 8 9 10
d0 d1 d2 d3 d4 d5 d6 d7
G0 —— G7
Sto
p
bitSto
p
bit
Sto
p
bit
Indicate bitIndicate bitIndicate bit
Start bitStart bitStart bit
(Chart 2-6.3）Third frame oscillogram
Data of first frame
Indicate bit is 0
X: D0, D1, D2 are decimal point
Y: D3 is weight sign (1 is minus, 0 is plus)
D4 is net/gross weight (1 is net weight, 0 is gross weight)
D5 is unit (1 is ton, 0 is kg)
G 17, G 16 are weighing data
Data of second frame
Indicate bit is 0
G15-G8: binary system data
Data of third frame
Indicate bit is 1

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G7-G0: binary system data
G0-G17: 18 digits binary weighing sign from low to high
4. The indicator is able to connect with the matched display screen by standard RS232.
But the reconnection is required. To the 5 pins plug, connect feet 2 with feet 3, to the
15 pin plug, connect feet 9 with feet 11, and connect feet 10 with feet 12. Please refer
to the chart below after reconnection.
5 pins plug specification 15 pins indicator terminal
1
Feet 4、5 connected with feet
12 by short circuit
2
3 TXD 11
4
5 GND 3
．
Chart 2-1 RS 323 communication mode
5. Serial communication interface
Serial interface should be connected with pc in a right way. Otherwise damage occurs
to the indicator terminal or pc’s even worse damages the indicator and pc.
Computer skill and programmer ability are required by computer operation. Only
qualified personnel are allowed to service this equipment.
i. Load cell D2002E type realize data transmission between pc and indicator by
serial interface. The transmission is continuous, baudrate 600, 1200, 2400,
9600bps are optional. 15 pins plug is used to connect serial interface and display
terminal. Please refer to chart 2-5 for detailed information on Feet 1, 2 (RS232). It
is better to put the shield into earth at the PC terminal.
ii. Three communication modes
Mode 1: data is ASCII code, each byte includes 10 digits. Digit 1 is the start bit, digit
10 is the stop bit, and the middle 8 digits are data bit. Each rule digit includes 8 bits
including decimal. Data transmit from low to high, each data rule is separated by “ =”.
The display shows the weighing sign. Take 188.5 for example, continuous transmission
5.88100=5.88100=……. When the digit is –1885, transmission .58810=.58810=……
Mode 2:
Each byte includes 10 digits. Bit 1 is the start bit, bit 10 is the stop bit, and the middle 8
bits are data bit. Each rule digit includes 18 bits.

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Mode 2
STX A B C XXXXXXXXXXXXCR CKS
1 2 3 4 5 6
1. <STX> ASCII start bit (02H).
2. State character A,B,C
3. Weight: it may be gross weight or net weight. 6 digits show weight without sign or
decimal.
4. Tare: 6 digits without sign or decimal
5. <CR> ASCII Enter key (ODH)
6. <CKS> optional verify and (this indicator don’t send out any verify)
State character A
Bits 0 , 1 , 2
0 1 2 Decimal
position
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
XXXX00
XXXXX0
XXXXXX
XXXXX.X
XXXX.XX
XXX.XXX
XX.XXXX
X.XXXXX
Bits 3 , 4
3 4 Division value
gene
1
0
1
0
1
1
X1
X2
X5
Bit 5 Keep 1
Bit 6 keep 0
State character B
Bits function

Bit 0 Gross weight = 0 , net weight = 1
Bit 1 sign :plus= 0 , minus = 1
Bit 2 overload ( or less than 0) = 1
Bit 3 motion = 1
Bit 4 unit : kg = 1
Bit 5 keep 1
Bit 6 When indicate power on it shows 1
State character C
Bit 0 keep 0
Bit 1 keep 0
Bit 2 Keep 0
Bit 3 Print command = 1
Bit 4 Expanded presentation (X10) = 1
Bit 5 keep 1
Bit 6 keep 0
Mode 3
Each byte includes 10 digits. Bit 1 is the start bit, bit 10 is the stop bit, and the middle 8
bits are data bit and parity bit.
Header 1
ST: stability
US: instability
OL: overload
Header 2
GS: gross weight
NT: net weight
TR: tare weight
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Chapter 4 Look over INS (internal statement number) of load cell
Please plug calibration plug into 15 pins RS232 at the back of indicator for load cell INS
information. The ISN provides technical parameters for manual Corner adjustment and
information for us to judge it is malfunction or not. Please refer to the below chart for
detailed information.( * is original value, load cell number starts 01, if 4 load cells in total
they are 01,02,03,04)
Step Operation Display Remark
1. Select the
number of
load cell
Press
[check ]
Press [0][2]
Press
[check ]
[no-01]
[no-02]
Plug in calibration plug under weighing
state
Default: check cell 01 ISN
command: check cell 02 ISN
2. ISN
display
Press
[check ]
[ 2350] No. 02 load cell 02 ISN is 02350
When finish, it returns to weighing state.
Notice please plug off the calibration plug when operation finishes
When mistake happen which be caused by hot plug in or off, please press key “check“or
“power off” for a new set up

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Chapter 5 Corner adjustment
1. Manual Corner adjustment
Please plug calibration plug into 15 pins RS232 at the back of indicator for manual Corner
adjustment. Please refer to the below chart for detailed information. (* original value, load
cell number starts 01, if there are 4 load cells in total, they are 01,02,03,04 )
Step Operation Display Remark
1. Select the
number of load
cell
Press [Manua
Corner-Rectify]
Press [0][2]
Press [Enter]
[no- 01]
[no- 02]
Plug in calibration plug under weighing
state
Default adjust load cell 01
command: check cell 02 ISN
2Adjustment
Press [1]、[0]、
[0]、[4]、[5]、
[0]
press [enter]
[1.00000]
[1.00450]
Original Corner data
Adjust data into 1.00450（data is available
from 0.5000 to 2.0000）
When finish, it returns to weighing state
Notice please plug off calibration plug when operation finishes
When mistake happen which be caused by hot plug in or off, please press key “check“ or
“power off” for a new set up
2. Automatic Corner adjustment
Generally speaking, digital load cell has a good sensitivity consistency. When the scale has been
correctly installed, it only needs slight hand adjustment according to the user’s manual, or even do
not need adjustment. If it can not be adjusted equal by hand please apply to the auto adjustment.
Operating Steps：
Power off——Plug in the calibration plug——Power on

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Steps Operation Display Note
1．Power on and
choose
operating mode
Press[Auto
Corner-Rectify]
Enter
[1][1][1][1][1][1]
，
Press[Enter]
[-------]
[111111]
[Ant 04]
Note to enter password
Only if the password is 111111 can you
carry on the next step, otherwise return to
the weighing states.
Default load cells number is 4;
2.Set
Corner-Rectify
number
Press[0][6]
Press[Enter]
[Ant 06] Enter number, 6 for example
Press[Enter] continue to next step
3. Set pressing
weight value
Press
[0][0][5][0][0][0]
Press[Enter]
[ 000000]
[005000]
Display the pressing weight 0
Enter Pressing weight ，5000kg for
example
Press [Enter] continue to next step
4. Confirm the first
corner
Press[Enter]
[No 1] Display the first corner, after loading and
being stable. 5000kg for example
Press[Enter] to confirm，and continue to
next step
5. Confirm the
second corner
Press[Enter]
[No 2] Display the second corner, after loading
and being stable. 5000kg for example
Press[Enter] to confirm，and continue to
next step
7. Confirm number
n corner Press[Enter]
[No n]
[ …… ]
[ End ]
N is total corner number, after loading and
being stable. 5000kg for example
Press[Enter], wait for about 30 seconds，
End the Corner-Rectify. Press [Enter] or
power off to quit.
Repeat calibration
▲ ！ Error caused by power intermit, please press [check] or shut down
power and reset.
！ After Auto Corner-Rectify, demarcation must be applied again

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Chapter 6: Calibration
When indicator is packed before leaving factory, there is also a 15 pins RS232 plug, called
calibration plug which is used to set the related coefficient between the indicator and load
cells.
When the indicator is working, the calibration plug should not be plugged in. Any time
when the plug used, following process should be adopted. Power off－Plug in－Start－Set
coefficient－plug out
Errors caused by power intermit, please press [check] or shut down power
and reset.
1. Power off——calibration plug is plugged into the 15 pins RS232 jack in the back of
the indicator.（Note：The 15 pin plug stuck with “Calibration Plug” in the box before
leaving factory is just the calibration plug）.
2. Correctly connect the load cells, turn on power, the indicator adopts self inspection of
strokes and sound. After then, turn into working states.
3. If deadlock (no response to key press under weighing state)，you can turn off the power
and plug in the calibration plug. During the self inspection of strokes and sound, press
[Calibration] and enter the calibration state to modify the deadlock caused by
calibration error; press [Check] can inquire the ISN of each load cell (Please refer to
chapter 4 for detailed instruction). Through this you can find which load cell or line is
malfunction.
4. Calibration and parameter setting. Operation is as following form: (*：is original value,
load cell serial is started from 01, if there are 4 load cells, then their serial number will
be 01、02、03、04. The units of weight value that this indicator displays are all kg.
Operation Process of Calibration:

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Steps Operation Display Note
1.Set division
Va l u e
Press
[Calibration]
Press[0][5]
Press[Enter]
Press[1][0]
[d1 **]
[d1 05]
[d2 **]
[d2 10]
The Calibration plug has been plugged in
under weighing state.
Means setting the first part division value;
Set the first part division value to 05, 01~99
available. Press [Check] to skip this step,
press [Weight] back to the weighing state
Press [Enter] to finish the first part division
value setting and enter the second division
value setting;
Set the second part division value to 10,
01~99 available. Press [Check] to skip this
step, press [Weight] back to the weighing
state
2. Set auto zero
tracing
coefficient
Press[2].[0]
Press[Enter]
[Auto *.*]
[Auto 2.0]
Display original set auto zero tracing
coefficient
Set zero tracing to 2.0d, 0.1d~9.9d available.
Press [Check] to skip this step, press [Weight]
back to the weighing state
Press [Enter] to finish the setting of auto zero
tracing coefficient.
3.Set Zero
range
Press[0][1]
Press[Enter]
[CLr **]
[CLr 01]
Display original Zero
Set Zero to 01, 00/01/02/03/04/ available. Start
Zero are separately 4%、10%、20%、40%、100%，
manual 1%、2%、4%、10%、20%.
Press [Check] to skip this step, press [Weight]
back to the weighing state
Press [Enter] to finish the setting of Zero
range.

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4.Set
ponderation
form printing
format
Press[0][1]
Press[Enter]
[Prt **]
[Prt 01]
Display original set ponderation form printing
format
Set printing format to 1, that is non printing
single unite format
Choices：00、01、02、03 series, they are filling
style, non filling single unite, non filling double
unite, non filling three or four unite.
Press [Check] to skip this step, press [Weight]
back to the weighing state
Press [Enter] to finish the setting of
ponderation form printing format.
5．Set the paper
feeding mode
Press[0][2]
Press[Enter]
[Ps **]
[Ps 02]
Display original set paper feeding mode.
Set paper feeding mode to 02, that is continuous
feeding mode and able to feed and withdraw
paper automatically.
Choices：00、01、02；00 is paper form feeding
mode. That is when printing a ponderation
form, a new paper adopts; 01 is continuous
paper feeding mode;
02 is continuous paper feeding mode and able
to feed and withdraw paper automatically.
Press [Check] to skip this step, press [Weight]
back to the weighing state
Press [Enter] to finish the setting of paper
feeding mode.
6．Set the load
cell number
Press[0][4]
Press[Enter]
[Ant-**]
[Ant-04]
Display original set load cell number
Set load cell number to 4(range 1-10)，Press
[Check] to skip this step, press [Weight] back
to the weighing state
Press [Enter] to finish the setting of load cell
numbers.