XK3190-C8

Weighing Indicator

User Manual

Version April 2009

Manufactured by Shanghai Yaohua Weighing System Co., Ltd.

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Contents
Chapter 1 Profile ---------------------------------------------------------------------------------------------------------------2
Chapter 2 Main Parameters ---------------------------------------------------------------------------------------------------3
Chapter 3 Installation, Interface and Data Format-------------------------------------------------------------------------4
I. Diagram of Front and Back Function Buttons of Indicator ------------------------------------------------------4
II. Connection of Load Cell and Indicator ----------------------------------------------------------------------------6
III. Input and Output Interface -----------------------------------------------------------------------------------------6
IV. Large-screen Display Interface-------------------------------------------------------------------------------------6
V. Serial Communication Interface ------------------------------------------------------------------------------------6
VI. Analog output --------------------------------------------------------------------------------------------------------7
VII. Print and Storage----------------------------------------------------------------------------------------------------8
Chapter 4 Parameter Setting and Calibration-------------------------------------------------------------------------------9
I. [SEt 0] Enquiry Parameter----------------------------------------------------------------------------------------9
II.【SEt 1】General Parameters --------------------------------------------------------------------------------- 11
III. [SEt 2] Control Parameters ----------------------------------------------------------------------------------- 12
IV. Record Print [SEt 3] ------------------------------------------------------------------------------------------- 16
V. Calibration ----------------------------------------------------------------------------------------------------------- 16
Chapter 5 Operating Instructions------------------------------------------------------------------------------------------- 18
I. Startup and zero setting upon startup ----------------------------------------------------------------------------- 18
II. Zero setting manually ---------------------------------------------------------------------------------------------- 18
III. Tare ------------------------------------------------------------------------------------------------------------------ 18
IV. Setting of date and time ------------------------------------------------------------------------------------------- 18
V. Startup/stop ---------------------------------------------------------------------------------------------------------- 18
VI. Peak holding-------------------------------------------------------------------------------------------------------- 18
VII. Input and output function---------------------------------------------------------------------------------------- 18
VIII. Inquiry of common parameters -------------------------------------------------------------------------------- 19
Chapter 6 Explanations of Control Procedure---------------------------------------------------------------------------- 20
I. Mode 0（additive mode with 1 batching material） ----------------------------------------------------------- 20
II. Mode 1（subtracting mode of 1 batching material） --------------------------------------------------------- 21
III. Mode 2（additive scale for two materials） ------------------------------------------------------------------ 24
IV. Mode 3（catchweighing mode） ------------------------------------------------------------------------------- 25
Annex 1 Error Message Prompt-------------------------------------------------------------------------------------------- 29
Annex 2 Large Screen Data Waveform Diagram and Format --------------------------------------------------------- 30
Annex 3 Serial Communication－Data Format of Command Response Mode ------------------------------------- 32

Dear customer:

Please read carefully the user manual before using the indicator!

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Chapter 1 Profile

XK3190—C8 weighing indicator adopts MCS—51 single chip microprocessor and high-speed Σ-△A/D
switch technology, which performs conversion and displays weight, with the maximum conversion speed
reaching up to 80 times/second. The display can be easily connected to the resistance strain gauge load cell to
form batching scale, quantitative packing scale and control scale etc., which are applicable to various control
occasions where high-speed and high precision weighing are required.

Main functions and features of XK3190—C8 weighing indicator:

1. Integration of additive scale, subtracting scale, catchweigher function, with 3-channel input of external
control and 3-channel control output;
2. Standard asynchronous serial communication interface (RS232 or RS422/485), with flexible communication
mode (continuous send and command response);
3. 0-20mA/4-20mA (or 0-5V/0-10V) DA precision output, adjustable;
4. Upper and lower limit alarm output setting;
5. High-precision A/D conversion with readability up to 1/30000;
6. 5-point nonlinear correction;
7. When changing indicator, re-calibration is not required; and you can use it with parameters of original
indicator;
8. Scoreboard output;
9. Flexible peak holding function;
10. Storage, inspection and deletion function of information such as summation of weighing data and
accumulated frequency etc.; power-off data protection is provided;
11. It can be connected to serial printer to print weighing record, accumulated amount or parameters; manual
or automatic print is optional;
12. It has tare function; when the automatic control is activated, the automatic tare can be selected;
13. The digital filtering intensity of AD data can be changed according to requirements;
14. Many kinds of operating information and error message prompts;
15. Selection of printing unit: kg, t, g, lb;
16. Real-time clock, calendar, automatic leap year, leap month display, which are not affected by power off;
17. Factory defaults recovery function;
18. Strong immunity and high reliability.

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Chapter 2 Main Parameters

1. Type: XK3190—C8 weighing indicator

2. Accuracy: Class 3, n=3000
3. Input signal range: -19mV～ +19mV
4. Nonlinear: ≤0.01%F.S
5. No. of connected load cell: 1～8 350Ω load cell
6. Power supply for load cell: DC：5V；350mA
7.Connecting type of load cell: 6 -wire system is adopted, the long line is compensated automatically.

8. Display: Single-row 7-bit LED, character height 0.5, and 11 status indicating
lamps
9. Division: 1/2/5/10/20/50/100 optional
10. Clock: Display real time and date.
11. Keyboard: Adopt 5 soft touch buttons
12.Scoreboard interface: Adopt serial output, 20mA constant current source signal.
13 Communication interface: Serial RS422/RS422/RS485, optional; baud rate 1200～9600 optional
14.Print interface: Shared with serial port, and can be connected to serial printer.
15. Relay output: Capacity AC：220V; 0.5A
16. External input: Switch contact (close control is effective)
17. Power supply: AC 110～230V, 50/60Hz 1A
18.Service temperature,
0～40℃；≤90％RH
moisture:
19.Storage and transportation
-20～50℃
temperature:
20. External dimension: Housing: 150×76×85mm (width × height × depth)
Panel: 172×93×3mm (width × height × thickness)
21. Dead weight: Approximately 700 gram

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Chapter 3 Installation, Interface and Data Format
I. Diagram of Front and Back Function Buttons of Indicator

Figure 3－1 Diagram of Front Function Buttons

The meanings of the 11 indicating lamps on display panel are showed as follows from left to right:
Power supply: power supply indicating lamp
Operation: automatic operation status
Zero point: zero zone indication
Net weight: net weight status
Stabilization: stabilization status
IN: three input indications (1, 2, 3 represents three inputs respectively)
OUT: three output indications (1, 2, 3 represents three outputs respectively)
The five buttons on display panel has the following meaning respectively:
Symbol Button name Meaning

[ F1 ] button Press [F1] and [Operation] buttons simultaneously to examine the inner code

[Operation]
It also serves as stop button. It is return button in parameter setting status.
button
[Zero setting]
It is shift key in parameter setting status.
button

[Tare] button It is value increase button in parameter setting status.

[Print input]
It is print button under the situation of displaying weighing value.
button

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Figure 3－3 Diagram of Main Board Jumper and Calibration Switch

All interfaces in Figure 3-2 will be described in detail below, please read the following detailed interface
description while referring to the interface position in Figure 3-2.

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II. Connection of Load Cell and Indicator

The connection with load cell adopts the six wire system connection mode. Please refer to the interfaces in the
Diagram of Back Function Buttons, Figure 3-4. Detailed definitions are given below:

EX+ : Positive load cell excitation

SEN+: Positive compensation
SEN-: Negative compensation
EX-: Negative load cell excitation
SIG+: Positive signal
SIG-: Negative signal
GND: Ground

Tips: If the long line compensation function (four wire system connection mode) is not used, the pins of
“EX+” and “SEN+”, “SEN-” and “EX-” in Figure 3-4 must be short-connected, or otherwise, the
indicator can not be calibrated and weigh normally.

Ⅲ. Input and Output Interface

The indicator has totally three channels

of optical isolation input and three channels
of relay output. For interfaces, see Figure
3-5.
① The three outputs are connected to
the external system respectively according to
requirements. O1, O2, O3 terminals have
constant ON built-in relay, which can connect the controlled system directly to the two terminals of
corresponding interface.
Note: Switch contact; effective close control; contact capacity AC: 220V; 0.5A
② The access mode of three inputs is by connecting I1, I2, I3 with +12V, i.e. signal can be entered at the
input terminal. 0V terminal is prepared for customer’s special requirements.
The meaning of interface is different according to different modes. For detailed definition, please see
Chapter 5 Section 7 of this manual.
Note: The +12V terminal and 0V terminal can not be short connected.

IV. Scoreboard Display Interface

For large-screen interface, see Figure 3-6:
DP+, DP- in the Figure are connected to
the large-screen. For the detailed
communication format, see Annex 2.

V. Serial Communication Interface

Serial communication interface adopts RS232C (standard product). According to customer’s demands, the
RS485 interface can be selected through jumper (the output format is the same with RS232C). For the meaning
of interface pin connection, see Table 3-1. For the jumper selection mode, see Table 3-2.

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Table 3-1 Definition of Pin Table 3-2 Selection of Communication
Interface
232 communication 485 communication
Selection of Selection of jumper
GND: Grounded A: RXD+ receiving communication
JP1 JP2
RXD: Receiving end positive data interface
of indicator B: RXD- receiving RS232C
Left Left
TXD: Sending end of negative data (Factory defaults)
indicator Z: TXD- sending negative
RS485C Right Right
data
Y: TXD+ sending positive
data
This indicator can select continuous send or command response mode:
Continuous send mode:
The transferred data is the current weight (gross weight or net weight) displayed on the indicator. Each
frame of data is composed of 12 groups of data. The format is as follows:

Xth Byte Contents and notes

1 02(XON) Start
2 + or - Sign bit
3 Weighing data High-order bit
： Weighing data ：
： Weighing data ：
8 Weighing data Low-order bit
9 Decimal scale From right to left (0～4)
10 XOR check High four-bit
11 XOR check Low four-bit
12 03(X0FF) End
NOR＝2⊕3⊕……8⊕9
2. Command response mode: (For detailed format, please see Annex 3)
VI. Analog output

C8 indicator can choose 3 analog output modes: 0～5V, 0～10V voltage signal output and 4~20 mA
current signal output (It can be also adjusted to 0~20 mA actually). The electric current loop adopts internal
electrical power supply mode, the output mode is selected by jumper JM3～JM5 (See Figure 3-3) on main
board, and for the setting mode, please see Table 3-3. The factory setting is 4~20 mA electric current loop. The
switch of analog output is controlled by the C bit of parameter [H ABC] under parameter [SET 1].
Table 3-3 Setting of Analog output
Selection of jumper
Analog output
JM3 JM4 JM5

4—20mA (Factory defaults) Up —— Down

0—5V Down Right Up

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0—10V Down Left Up

Calibration method for analog output

The zero point value of analog output and full scale value are in direct proportion to corresponding DA
code (See Table 4-3, instructions of [SEt 1] parameter 12 and 13). The parameter 12 and parameter 13 can be
corrected by calculation according to the analog output error.
Note: At the mode of voltage output, short circuit of the analog output terminal is strictly
prohibited, and the load of 4-20mA electric current loop output cannot be misconnected, or otherwise
the analog output circuit may be damaged.

VII. Print and Storage

Print
The serial port communication RS232 connection mode is adopted. By means of selecting connection to
serial printer in indicator parameter Set 1, the weighing data can be printed through the serial port. Mainly
hand print and automatic print are available, which are introduced respectively below:
1. Hand print
Single print: In weighing status, press “Input/ Print” button to print the current time, date, net weight, tare
weight, accumulated frequency and accumulated weight.
Print record: At the mode of 0, 1, 2, all weighing records, including the time, date, net weight, tare weight,
accumulated frequency and accumulated weight for each weighing, can be stored and printed. For concrete
operations, see [Set 3].
2. Automatic print
After selecting printer and automatic print in parameter settings, information such as the current time,
date, net weight, tare weight, accumulated frequency and accumulated weight will be printed automatically
when a process is finished every time during the automatic control process.
Note: new printing cannot be proceeded until it returns to zero after every print; in status such as not
selecting printer or in hand peak holding function, the hand print function is invalid; when communication in
[Set 1] is not selected or communication is selected but the serial printer is not selected, print is not valid;
when the set baud rate is not 9600, [Err P] will be prompted.
Storage
Storage is often used together with print, and is also divided into hand storage and automatic storage.
Automatic storage should be enabled in parameter settings. Attention must be paid to several points during
storage:
1. Hand storage cannot be conducted in catchweighing mode.
2. The next storage cannot be executed until it returns to zero after every time of storage.
3. After the control mode (i.e. additive scale, subtracting scale, catchweigher) is changed, it needs to enter
the parameter setting 0 to eliminate the accumulated results, or otherwise the data may have error.

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Chapter 4 Parameter Setting and Calibration

If there is no special instruction for parameter setting, the button functions are as follows:
[F1] button: exit from parameter setting

[Operation] button: the current setting is not saved, and return to the previous parameter

[Zero setting] button: move the current flicker bit

[Tare] button: modify the current flickering value

[Input] button: make sure to save the current parameter setting, and enter the next parameter
setting

Press [F1] button and [Zero setting] button simultaneously to enter parameter setting selection interface.
The setting catalogues are:
【SEt 0】 ： enquiry parameter;
【SEt 1】 ： general parameter;
【SEt 2】 ： control parameter;
【SEt 3】 ： print record (no such function in catchweighing mode)
[Note] Please pay attention to the instruction in remarks for each parameter. Part of parameters will
only be displayed under specific mode or conditions.

I. [SEt 0] Enquiry Parameter

Table 4-1 Non-Catchweigher Mode

Para- Indicator
Parameter Specification Remarks
meter Display

1 [n ****] Accumulated frequency It can only be inquired, but not changed.

2 [A******] Accumulated weight It can only be inquired, but not changed.

Delete the selection of

0: no-operation
3 [dEL *] accumulated frequency and
1: execute deletion operation
accumulated weight

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Press [Zero setting] button to move the current
4 [d**.**.**] Current date setting flicker bit, press [Tare] button to modify parameter
value
Press [Zero setting] button to move the current
5 [t**.**.**] Current time setting flicker bit, press [Tare] button to modify parameter
value
6 [A ****] Zero position calibration

7 [b ****] CAL Coefficient

8 [C ****] Nonlinear correction point 1 Restricted parameter. The calibration switch must
be opened (turn the calibration switch CAL to the
CAL Coefficient 2 (nonlinear left ON position) when changing, and input the
9 [d ****] correct password.
correction)
Press [Input] button to check the parameter
10 [E ****] Nonlinear correction point 2 value one by one;

CAL Coefficient 3 (nonlinear Before pressing [Tare] button to modify

11 [F ****]
correction) parameter value, first enter the password
protection interface in Step 18!
12 [L ****] Nonlinear correction point 3 These parameters can be modified only by entering
the correct password for one time.
CAL Coefficient 4 (nonlinear
13 [H ****]
correction) When only checking the parameters, the indicator
will return to weighing status after Step 16 is
14 [P ****] Nonlinear correction point 4 displayed.
CAL Coefficient 5 (nonlinear
15 [ t ****]
correction)

16 [r ****] Nonlinear correction point 5

Whether to restore factory If recovery of factory setting is selected, it will
17 [HF *] setting: come into effect after re-startup, and the calibration
0: not restore; 1: restore parameters will not be changed.
It is password protection interface. Input the correct
password (111) and enter Step 6 to modify
18 [PAS 000] Password protection status
parameters. If the password is wrong, it will return
to weighing status.

Table 4-2 Catchweigher Mode

Para- Indicator
Parameter Specification Remarks
meter Display
Accumulated frequency of
1 [n 1 ****] It can only be inquired, but not changed.
Channel 1
Accumulated weight of Channel
2 [A******] Ditto
1
Accumulated frequency of
3 [n 2 ****] Ditto
Channel 2
Accumulated weight of Channel
4 [A******] Ditto
2

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Accumulated frequency of
5 [n 3 ****] Ditto
Channel 3
Accumulated weight of Channel
6 [A******] Ditto
3
The following parameters are same with the latter
7 [d**.**.**] Setting of current date
part of Table 1.

II.【SEt 1】General Parameters

Table 4-3
Para- Indicator
Parameter Specification Remarks
meter Display
Hardware selection
A － Communication (0: communication is not For example: When
communication is required,
required, 1: communication is required)
large-screen and analog are not
1 [H ABC] B－Large-screen (0: large-screen is not required, 1:
required, set it to [H 100].
large-screen is required)
Note: This setting will affect
C－Analog (0: analog is not required, 1: analog is the following display menu.
required)
Relevant Parameters of Zero Zone
A－zero setting range upon startup (0～5)
B－zero setting range by hand (0～5)
For example: if set the zero
A，B 0 1 2 3 4 5 setting range upon startup to
20%, the zero setting range by
F .S% 0 2 4 10 20 100
2 [n ABC] hand to 4%, and the zero
C－zero tracking range (0～8) tracking to 0.5e, it will be set to
When it is set to 0, the tracking function is closed. [n 421].
For other values, see the following table:
C 1 2 3 4 5 6 7 8

（e）0.5 1 1.5 2 2.5 3 3.5 4

AD Filtering Intensity (0～4) The smaller the value is, the
faster the weight changes, but
the stability is worse; The bigger
Value 0 1 2 3 4 the value is, the slower the
3 [FLt *] weight changes, but the stability
Filtering
Compar Compar is better. The user should adjust
weak atively medium atively Strong proper parameter according to
Intensity
weak strong requirements.

Communication Address of Indicator (01～26)

4 [Adr **] When several indicators send data to the same PC, It won’t be displayed when
this communication address is required to communication is not required.
distinguish each of the indicators.
Communication Baud Rate (0～4) It won’t be displayed when
5 [bt *] 0 1 2 3 4 communication is not required.
BPS 600 1200 2400 4800 9600 BPS

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Communication Mode:
0－command response mode (Refer to Chapter 3); It won’t be displayed when
6 [tod *]
1－continuous send mode communication is not required.
2－connect to serial printer
Automatic accumulated print:
0－automatic accumulation Accumulation and print
7 [AtP *]
1－automatic accumulation without print conditions should be satisfied.
2－automatic accumulation and automatic print
Print Unit:
0－kg (kilogram) It’s effective only when printing.
8 [Unit *] 1－g (gram) It won’t be displayed when
2－t (ton) communication is not required.
3 – lb (lbs)
Peak Holding:
0－Peak holding is closed.
Hand mode includes pressing the
1－Peak holding is effective, and the holding will
9 [F *] input button and input terminal
be cancelled automatically after returning to zero. to obtain input signal.
2 － Peak holding is effective; press the button
manually to cancel holding.
The corresponding weight of analog output zero It won’t be displayed when
10 [AL*****]
point analog output is not required.
The corresponding weight of analog output full It won’t be displayed when
11 [A******]
range analog output is not required.
DA inner code (0-30000) when analog output is at
The zero point for calibration
zero point
12 [PL ***] analog output of this parameter
(Output 4-20mA signal is about 12520;
can be modified.
output 0-5V/0-10V is 0)
DA inner code (30000-65535) when analog output
The zero point for calibration
is at full range
13 [PH ***] analog output of this parameter
(4-20mA output is about 62590;
can be modified.
0-5V/0-10V output is about 65200)
Whether to print this set parameter:
This item won’t be displayed
14 [Prt *] 0: No.
when there is no printer.
1: Yes.

III. [SEt 2] Control Parameters

Table 4-4
Para- Indicator
Parameter Specification Remarks
meter Display
Control Mode
0: 1 kind of additive mode of batching
1: 1 kind of subtraction mode of
For work flows of all kinds of mode, see
1 [CP *] batching
Chapter 6.
2: 2 kinds of additive mode of
batching
3:catchweighing mode
The number of control process (0～99, 0
2 [Pt 0] Number of cycles
stands for indefinite times)

Please select the corresponding parameter setting according to the set [Control Mode].

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Mode 0, 1 (Additive mode or subtraction mode for 1 kind of batching material)
Advanced Control Parameters
A－quick or slow feed status
0: When quick feeding, only the
quick feed is opened.
1: When quick feeding, both the
quick and slow feed are opened
simultaneously.

B － automatic tare status before

feeding
0: no automatic tare This parameter will change the control flow,
1: automatic tare so generally no modification should be made.
3 [C ABCDE]
C－self-correction selection for lead Some parameters are invalid at subtraction
0: no correction mode.
1: correction
D － out-of-tolerance treatment
selection
0: no treatment, the cycle
continues
1: wait for treatment until
qualified
E－material shortage gradual feed
0: no gradual feed
1: gradual feed
4 [A******] Batching value

5 [b******] Quick feed lead

6 [c******] Slow feed lead

7 [d******] Allowance
1. When the indicator is discharging, if the net
weight is less than that of zero zone value, it
will be deemed as discharge completion;
8 [L******] Zero zone
2. The indicator print and accumulation
cannot be conducted until the gross weight is
greater than the zero zone value.
0.0～9.9 seconds feed measurement To avoid weight misjudgment caused by
9 [t0 **]
delay weight impact when starting.
0.0～9.9 seconds delay of quick feed
10 [t1 **]
over
0.0～9.9 seconds delay of slow feed
11 [t2 **]
over
0.0～9.9 seconds gradual feed output It won’t be displayed when there is no gradual
12 [t3 **]
time feed.
0.0～9.9 seconds gradual feed interval It won’t be displayed when there is no gradual
13 [t4 **]
time feed.

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0.0～9.9 seconds time
14 [t5 **] Mode 0: discharge over delay
Mode 1: qualified output time
15 [t6 **] 0.0～9.9 seconds re-feed delay

Whether to print this parameter:

16 [Prt *] 0:No. It won’t be displayed when there is no printer.
1: Yes.

Mode 2 (Additive mode for 2 kinds of batching)

Advanced Control Parameters
A － automatic tare status before
feeding
0: no automatic tare
1: automatic tare
B－self-correction selection for lead
0: no correction
1: correction This parameter can change the control flow,
3 [C ABCD] C － out-of-tolerance treatment so it should be modified according to the
selection actual control needs.
0: no treatment, the cycle
continues
1: wait for treatment until
qualified
D－material shortage gradual feed
0: no gradual feed
1: gradual feed
4 [A******] Material 1 quantitative value.

5 [b******] Material 1 feed lead.

6 [C******] Material 1 allowance.

7 [P******] Material 2 quantitative value.

8 [d******] Material 2 feed lead.

9 [t******] Material 2 allowance.

1. The gross weight is judged when the

indicator is discharging, if the net weight is
less than the zero zone value, it will be
10 [L******] Zero zone deemed as discharge completion;
2. The indicator print and accumulation
cannot be conducted until the gross weight is
greater than the zero zone value.
0.0～9.9 seconds feed measurement To avoid weight misjudgment caused by
11 [t0 **]
delay weight impact during startup.
0.0～9.9 seconds material 1 feed over
12 [t1 **]
delay

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0.0～9.9 seconds material 2 feed over
13 [t2 **]
delay
0.0～9.9 seconds gradual feed output This item won’t be displayed when there is no
14 [t3 **]
time gradual feed.
0.0～9.9 seconds gradual feed interval It won’t be displayed when there is no gradual
15 [t4 **]
time feed.
0.0 ～ 9.9 seconds discharge finish
16 [t5 **]
delay

17 [t6 **] 0.0～9.9 seconds re-feed delay

Whether to print this parameter:

18 [Prt *] 0: No. It won’t be displayed when there is no printer.
1: Yes.

Mode 3 (Catchweighing Mode)

Para- Indicator
Parameter Specification Remarks
meter Display
Self-testing mode: When the weight is greater
than zero zone value, it starts catchweighing
Catchweighing Mode: automatically.
0－Self-testing mode External control mode: Only when the
3 [FodE *]
1－External control mode external control signal is triggered, the
2－Upper and lower limit mode indicator begins catchweighing.
Upper and lower limit mode: The real-time
upper, medium, lower limit relay output.
Upper limit setting: Input a weight When the weight value is smaller than the
4 [H******] value that is between zero and full lower limit, O1 is output;
range. When the weight value is between the lower
Lower limit setting: Input a weight limit and upper limit, O2 is output;
5 [L******] value that is between zero and full When the weight value is greater than the
range. upper limit, O3 is output.
1. Enter the next cycle only after sending out
the catchweighing signal and the indicator
6 [Lq*****] Zero zone weight is less than this value;
2. Enter t1 only when the indicator weight is
greater than this value at self-checking mode.
Judgment Delay (0～9.9) Seconds:
At external control mode, data
calculation is conducted only after the
7 [t0 **] external control is triggered for t0
second;
At self-checking mode, data
calculation is conducted after the
weight leaves zero zone for t0 second.
Calculation Time for Average
Weight (0～9.9) Seconds:
The indicator will accumulate,
8 [t1 **]
average the weight within t1 after t0,
and the obtained value will serve as
catchweighing basis.

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Calculation Delay (0～9.9) Seconds:
9 [t2 **] The indicator has no action within t2
after t1 is calculated, wait with delay.
Signal Sending Time (0 ～ 9.9)
10 [t3 **] Seconds:
The indicator sends catchweighing
signal, with duration of t3 second.
Whether to print this parameter:
11 [Prt *] 0: No. It won’t be displayed when there is no printer.
1: Yes.

★Please confirm H≥L during setting, or otherwise the indicator cannot work normally, and may cause
unexpected errors. The above time does not take reaction time such as relay action into consideration.
IV. Record Print [SEt 3]

(This function is only effective at Mode 0, 1, 2)

Table 4-5
Para- Indicator
Parameter Specification Remarks
meter Display
The sequence number of records
1 [n ***] The sequence number of records to be printed is corresponding to accumulated
frequency.
Whether to print record:
It won’t be displayed when there
2 [Prt *] 0: No.
is no printer.
1: Yes.

The form of printed record sheet is shown as Table 4-6:

Table 4-6
Date: Feb 11, 2009
Time: 16:18:36
Net Weight: 5.00kg
Gross Weight: 0.00kg
Accumulated 0011
Frequency:
Accumulated 115.00kg
Weight:

V. Calibration

Turn the calibration switch CAL to the left ON position to open the calibration switch. Then press [F1]
button and [Input] button simultaneously, the indicator displays [--CAL--], indicating entering calibration
status. Press [Input] button to enter. For specific calibration parameter instructions and operation, refer to the
following table (* stands for the original set value):
Table 4-7
Parameter
Step Parameter Instruction Operation Instruction
Display

1 [E *] Division: 1/2/5/10/20/50/100 optional Press [Input] after modifying parameters

2 [dC *] Digits of decimal point (0-3) Press [Input] after modifying parameters

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Full value (The alarm limit set
3 [F******] Press [Input] after modifying parameters
automatically is full value plus 9 division)
Save the original zero position:
0: the current zero position needs to be
Input 0 to enter Step 5 (recommended),
4 [r 0] reconfirmed;
Input1 to enter Step 7.
1: skip over the current zero position
confirmation.
Confirm that the current weighing
5 [noLoAd ] Zero position confirmation platform has no load and the stability
lamp is ON, then press [Input].
6 [*******] Display the current AD code Press [Input] after the AD code is stable.

7 [AdLoAd1] Load weights Press [Input] after the weight is loaded.

8 [*******] Display the current AD code Press [Input] after the AD code is stable.
Change to the weight value of current
weights, press [Input] button to enter Step
12 and complete the calibration;
9 [ *******] The weight of current loaded weights
Change to the weight value of current
weights, press [F1] button to enter the
nonlinear correction flow of Step 10;
th
Load weights, calibrate the weight of n Press [Input] to enter the next step after
10 [AdLoAd* ]
point (n<=5) weights are loaded.
Press [Input] to enter Step 9 cyclically
after the AD code is stable. (At most five
11 [*******] Display the current AD code
-point nonlinear correction can be
conducted)
The calibration is finished. Return to
12 [*******] Display the current weight value
weighing status.
Please put the calibration switch at OFF position after calibration is finished

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 X K 3 1 9 0－C 8
Chapter 5 Operating Instructions
I. Startup and zero setting upon startup

After connected with the power, the display performs self-check of strokes “0-9”, then shows the version
No.. After that, it enters into weighing mode. After startup, if the weight of empty scale deviates from zero
point, but remains within the zero range, the display will perform zero setting upon startup. If the weight is out
of the zero setting range, the display shows the weight based on the calibrated zero point. For the zero setting
upon startup, please refer to the setting of parameter B in the parameters 1：[n ABC] as described in Chapter 1
【SEt 1】.
II. Zero setting manually

When the display value deviates from zero point, but remains within the range of zero setting manually,
ad the light is steady on, please press the button 【Zero setting】to make the display value reset to zero. The
zero point light is ON. For the range of zero setting manually, please refer to the setting of parameter A in the
parameters 1：[n ABC] as described in Chapter 1 【SEt 1】.
III. Tare

Under weighing status, when the displayed weight is a positive value and weighing is stable, press the
button 【Tare】to deduct the displayed value as tare. Then the displayed net weight is 0, with the net weight
indicator light ON.
IV. Setting of date and time

Set the date through the contents [d**.**.**] and the time through [t**.**.**] in parameters setting 【SEt
0】. Press the button 【Zero setting】to change the flicker bit, and 【Tare】to change the size. After completion
of setting, press the button【Input】for setting of other parameters or exit from setting by pressing the button
【 F1 】.
V. Startup/stop

For startup or stop, press directly the button 【Run】on key board, or input an impulse signal from the
“Startup” end of back panel, the indicator is ready to enter into control mode or exit from control mode.
VI. Peak holding

By means of setting the parameter [F *] in parameters【SEt 1, select the peaking holding mode:
0－peak holdings is off.
1－peak holding is valid, and it is cancelled automatically after zero setting.
2－peak holding is valid. Press the button 【input】to enable peaking holding; press the button 【input】once
again to disable peaking holding (under this status, the button 【input】has no save manually/print function).
VII. Input and output function

The input and output has the following meanings under different modes:

Input Output
Mode
I1 I2 I3 O1 O2 O3
Mode 0 startup/stop feed discharge Quick feed Slow feed discharge
Mode 1 startup/stop discharge —— Quick discharge Slow discharge complete
Mode 2 startup/stop feed discharge Feed material 1 Feed material 2 discharge
Mode 3 External
Net weight≤
Lower limit ＜ net
Net weight ≥
startup/stop control —— weight ＜ upper
lower limit upper limit
input limit

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 X K 3 1 9 0－C 8

Input and output test:

Press simultaneously the button 【F1】and【Run】to enter internal code status. At this moment, if level
signal is given to the input end 1, 2 and 3, the output end 1, 2, and 3 will output corresponding signal, and
corresponding indicating light on front panel of indicator is on.

VIII. Inquiry of common parameters

Press the button 【 F1 】under weighing mode to enquire the following parameters respectively:
Mode 0, 1：batching value, date, time
Mode 2 ：batching value 1, batching value 2, date, time
Mode 3 ：upper limit, lower limit, date, time

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 X K 3 1 9 0－C 8
Chapter 6 Explanations of Control Procedure
The four working modes of the indicator are explained in details as below:
I. Mode 0（additive mode with 1 batching material）

The double-speed batching of 1 kind of material mainly involves the following parameters: batching value
A1, quick feed lead b, slow feed lead C, allowance, zero value L. Please refer to the following figure for
understanding of the functions, meanings and time sequence of control input and output of various parameters
during the process:
Additive mode of 1 batching material:

Note: A—batching value; b—quick feed lead value; C—slow feed lead value; L—zero zone value.
t0—measurement delay；t1—quick feed over delay；t2—slow feed over delay；t3—gradual feed output
time；t4—interval time of gradual feed；t5—discharge over delay.
The schematic diagram of slow feed 1 shows the slow feed output when both the quick feed and slow

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 X K 3 1 9 0－C 8
feed are ON during quick feed process, and gradual feed exists.
The schematic diagram of slow feed 2 shows the slow feed output when only the quick feed is ON
during quick feed process, and without gradual feed.
The control procedure in the above diagram is composed of 4 processes including quick feed, slow feed,
gradual feed and discharge.
（1） Quick feed-- When the control procedure starts, the quick feed output gives out a signal, and the
corresponding O1 relay is closed. When the weight is added to the quick feed stop value A-b, the
quick feed output signal is cancelled, the corresponding O1 relay is switched off.
（2） Slow feed-- After a period of delay time t1 (quick feed over delay), the slow feed output gives out a
signal, and the corresponding O2 relay is closed. When the weight is added to the slow feed stop
value A-C, the slow feed output signal is cancelled, the corresponding O2 relay is switched off. If the
parameter is set to both quick feed and slow feed ON, the slow feed output gives out a signal since
the beginning, and the corresponding O2 relay is closed until the weight reaches up to the slow feed
stop value A-C.
（3） Gradual feed-- If the parameter is set with gradual feed, the O2 relay corresponding to slow feed will
be closed for a period of t3, and switched off for a period of t4. Gradual feed is carried out through
such repeated cycle, until the weight reaches up to the allowance range of batching value, i.e. the
qualified area.
（4） Discharge-- Discharge output sends out a signal, and the corresponding O3 relay is closed. After the
weight is less than the value L in zero zone, the discharged is considered completed, which
corresponds to point M in the figure. At this moment, after another delay of t5, the discharge output
signal is cancelled, and the corresponding O3 relay is switched off. A complete control procedure is
finished.
Note: during the above process, if the slow feed lead is bigger than that of quick feed lead, i.e. C>b, then
the slow feed output won’t give out signal, and the corresponding O2 relay remains switched off. If no
gradual feed is set for parameters, the above gradual feed process (3) is not included. The turning off of
discharge should meet the conditions that the weight is less than zero zone value.

II. Mode 1（subtracting mode of 1 batching material）

Please refer to the following figure for understanding of the functions, meanings and time sequence of
control input and output of various parameters during the process:
Note: A—batching value; b—quick subtraction lead value; C—slow subtraction lead value;
t1—quick subtraction over delay；t2—slow subtraction over delay；t3—gradual feed output time；
t4—interval time of gradual feed；t5—discharge over delay
The schematic diagram of slow subtraction 1 shows the slow subtraction output when both the quick
subtraction and slow subtraction are ON during quick subtraction process, and gradual feed exists.
The schematic diagram of slow subtraction 2 shows the slow subtraction output when only the quick

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 X K 3 1 9 0－C 8
subtraction is ON during quick subtraction process, and without gradual feed.
The control procedure in the above diagram is composed of 4 processes including quick subtraction,
slow subtraction, gradual feed allowance treatment and discharge.
（1） Quick subtraction -- When the control procedure starts, the quick subtraction output gives out a
signal, and the corresponding O1 relay is closed. When the weight is reduced to the quick
subtraction stop value A-b, the quick subtraction output signal is cancelled, the corresponding O1
relay is switched off.
（2） Slow subtraction -- After a period of delay time t1 (quick subtraction over delay), the slow
subtraction output gives out a signal, and the corresponding O2 relay is closed. When the weight is
reduced to the slow subtraction stop value A-C, the slow subtraction output signal is cancelled, the
corresponding O2 relay is switched off. If the parameter is set to both quick subtraction and slow
subtraction ON, the slow subtraction output gives out a signal since the beginning, and the
corresponding O2 relay is closed until the weight reaches up to the slow subtraction stop value A-C.
（3） Gradual feed -- If the parameter is set with gradual feed, the O2 relay corresponding to slow
subtraction will be closed for a period of t3, and switched off for a period of t4. Gradual feed is
carried out through such repeated cycle, until the weight reaches up to the allowance range of
batching value, i.e. the qualified area.

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 X K 3 1 9 0－C 8

（4） Discharge-- Discharge output sends out a signal, and the corresponding O3 relay is closed. After the
delay of t5, the discharge output signal is cancelled, and the corresponding O3 relay is switched off.
A complete control procedure is finished.
Note:
1. During the above process, if the slow subtraction lead value is bigger than the quick subtraction lead
value, i.e. C>b, the slow subtraction output won’t give out signal, and the corresponding O2 relay
maintains switched off. If no gradual feed is set for parameters, the above gradual feed process (3)
is not included.
2. When the residual weight doesn’t reach to the batching value, the indicator stops subtraction, and
wait for feed signal. After receiving feed signal, the indicator starts to feed material, and make
judgment to the weight during feeding process. When the batching value is obtained, material
feeding is stopped. At this moment, the weight can finish a subtraction cycle, then material
subtraction is continued. For example, if the batching value is 50Kg, when the remaining material in
the hopper is only 20kg, no subtraction will be performed until the hopper is added with material up
to 50Kg.
3. The discharge process in the subtracting scale can be used to remove the container loaded with

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 X K 3 1 9 0－C 8
material, just like a discharge process.

III. Mode 2（additive scale for two materials）

Note: A—batching value of material 1; b—lead value of material 1; P—batching value of material 2; d—lead
value of material 2; L—zero zone value.
t0—measurement delay；t1—feed over delay of material 1；t2—feed over delay of material 2；t3—gradual feed
output time; t4-interval time of gradual feed; t5-discharge over delay time.

The control procedure in the above diagram is composed of 5 processes including feed of material 1,
gradual feed out-of-allowance treatment of material 1, feed of material 2, gradual feed out-of-allowance
treatment of material 2 and discharge.
（1） Feed of material 1-- When the control procedure starts, the feed output of material 1 gives out a
signal, and the corresponding O1 relay is closed. When the weight is added to the feed stop value of
material 1 A-b, the feed output signal of material 1 is cancelled; the corresponding O1 relay is
switched off.

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 X K 3 1 9 0－C 8
（2） Gradual feed out-of-allowance treatment of material 1-- After the delay for a period of t1 (feed over
delay of material 1), if the parameter is set with gradual feed, the O2 relay corresponding to feed of
material 1 will be closed for a period of t3, and switched off for a period of t4. Gradual feed is
carried out through such repeated cycle, until the weight reaches up to the allowance range of
batching value of material 1, i.e. the qualified area.
（3） Feed of material 2-- The feed output of material 2 gives out a signal, and the corresponding O1 relay
is closed. When the weight is added to the feed stop value of material 2 P-d, the feed output signal of
material 2 is cancelled, the corresponding O1 relay is switched off
（4） Gradual feed out-of-allowance treatment of material 2 -- After the delay for a period of t2 (feed over
delay of material 2), if the parameter is set with gradual feed, the O2 relay corresponding to feed of
material 2 will be closed for a period of t3, and switched off for a period of t4. Gradual feed is
carried out through such repeated cycle, until the weight reaches up to the allowance range of
batching value of material 2, i.e. the qualified area.
（5） Discharge -- Discharge output sends out a signal, and the corresponding O3 relay is closed. After the
weight is less than the value L in zero zone, the discharged is considered completed, which
corresponds to point M in the figure. At this moment, after another delay of t5, the discharge output
signal is cancelled, and the corresponding O3 relay is switched off. A complete control procedure is
finished.
Note: If no gradual feed is set for parameters, the above gradual feed process (2), (4) is not included.

IV. Mode 3（catchweighing mode）

1. Self-check mode of catchweigher

Application examples:
Supposing belt weigher is provided at the site, 3 kinds of cargoes of different weight 5Kg, 10Kg and
15Kg respectively need to be catch weighed through the belt user, which are transferred by the belt once every
10 seconds; the time for loading and unloading the weighing platform is about 2seconds, and the cargoes stay
on the platform for about 4 seconds, based on these conditions, we can make the following parameters setting
in 【SET--2】(2-digit decimal number is assumed to set during calibration). The cargoes less than 7.5kg are
sorted to channel 1, the cargoes between 7.5kg and12.5kg are sorted to channel, while those more than 12.5kg
are sorted to channel 3.

Parameters Indicator display Parameters setting Setting instructions

1 [CP *] 3 3 catchweighing modes are set hereof.

the times of control process (0～99，0 means

2 [Pt 0] 00
indefinite times)

Mode 3（catchweighing mode）

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Parameters Indicator display Parameters instructions Remark

Self-check mode: automatic catchweighing is

started when the weight is bigger than that in
zero zone
3 [FodE *] 0
Upper and lower limit mode: real time upper
limit, intermediate limit and lower limit
relay output
Set to the intermediate value of 2 cargoes to
4 [H******] 12.50
facilitate catchweighing
Set to the intermediate value of 2 cargoes to
5 [L******] 7.50
facilitate catchweighing
A bigger value in zero zone to remove other
6 [Lq*****] 4.00
interference
about 2 seconds for loading the weighing
7 [t0 **] 20
platform
about 4 seconds in staying on weighing
8 [t1 **] 40
platform
about 2 seconds waiting for the cargoes to be
9 [t2 **] 20
unloaded from weighing platform
send a channel signal with duration of 2
10 [t3 **] 20
seconds
Please refer to the following diagram for control time sequence:

Schematic Diagram of Control Process 4

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 X K 3 1 9 0－C 8
Brief description of control process（please understand in combination with the time sequence
diagram）：
（1） The indicator is put into operation and judge if the weight is bigger than the value in zero zone. If so,
t0 delay is started, waiting for cargo to be loaded on the weighing platform.
（2） The time t0 is over, and starts to calculate the average weight of cargoes, with time duration of t1.
The value obtained from calculation serves as foundation for later catchweighing signal.
（3） The time t1 is over, t2 delay starts, waiting for the cargo to be unloaded from the weighing platform.
（4） The time t2 is over, and the catchweiging channel signal is sent, to make the cargo enter into the
corresponding channel. The time for sending channel signal is t3.
（5） The time t3 is over, and signal is sent, and the indicator judges once again if the weight returns to
zero zone. The next cycle can’t be started only when the weight stays within zero zone.
2. External mode of catchweigher
Application example:
It is assumed that high speed catchweigher is used at site: the industrial control PLC together with this
indicator performs quick catchweighing to the cargo. PLC controls the transportation of cargo to the weighing
platform, and gives out a trigger signal to the indicator when it reaches there to make it calculate the weight.
The weight range of the qualified product of user is between 9.90Kg～10.10Kg. Channel signal is sent as per
weight, to make the PLC control and send to different channels. About 3-5 seconds is taken during 1 cycle.
The indicator and PLC should coordinate well. We can set the parameters in 【SET--2】according to the
following table (2-digit decimal is assumed during calibration).
Param
Indicator display Parameter setting Setting instruction
eter

1 [CP *] 3 3 is set, catchweighing mode

Times of control procedure （0～99，0 for

2 [Pt 0] 00
indefinite times）
External control mode: only when the
3 [FodE *] 1 external control signal is triggered will the
indicator start the catchweighing
4 [H******] 10.10 Qualified upper limit

5 [L******] 9.90 Qualified lower limit

Zero area is big, other interference can be

6 [Lq*****] 5.00
removed
The cargo is on the weighing platform when
7 [t0 **] 02 receiving the trigger signal, no long delay is
required.
2 seconds are sufficiently enough to calculate
8 [t1 **] 20
the weight.
After completing the calculation, PLC can be
9 [t2 **] 00 notified at once to remove the cargo. No delay
is required.
The channel signal with duration of 1 second
10 [t3 **] 10
is sent to ensure the receipt by PLC.

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 X K 3 1 9 0－C 8

Please refer to following diagram for control of time sequence

Schematic Diagram of Control Process 5

Brief description of control process（please understand in combination with the time sequence diagram）
（1） The indicators starts to run, waiting for trigger signal;
（2） The trigger signal is received, t0 delay occurs, waiting for cargo to be loaded stable.
（3） The time t0 is over; the indicator starts to calculate the average weight of cargo, with time duration
of t1. The value obtained from calculation serves as foundation for later catchweighing signal
（4） The time t1 is over, waiting for activation of t2.
（5） The time t2 is over, the channel signal for catchweighing is sent to make the cargo enter into
corresponding channels. The time for sending channel signal is t3.
（6） The time t3 is over, and the signal is sent and the indicator judges once again if the weight returns to
zero zone. The next cycle can’t be started only when the weight stays within zero zone

3. Upper and lower limit mode

After setting the upper and lower limit value, the instruction under operation will send real time the signal
at the output end according to the actual weight.

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 X K 3 1 9 0－C 8
Annex 1 Error Message Prompt

Err 01 Fail to meet tare requirements

Err 02 Fail to zero setting requirement

Err 03 The weight upon startup exceeds zero setting range

Err 04 Memory storage is full

Err 05 The input full value is 0 during calibration

Err 06 The calibrated loaded weight is too small

Err 07 The calibration switch is invalid

Err 08 Wrong input time or date

Err P The baud rate setting does not meet requirements during printing

OL The weight exceeds the full value

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Annex 2 Large Screen Data Waveform Diagram and Format
1. The large screen signal is the 20mA constant current loop signal, with binary code serial output, and
baud rate of 600. Every frame of data has 11 bits, including 1 start bit (0), 8 data bits (low-order bit in
front), 1 flag bit, and 1 stop bit (1).
2. A set of data is set every 100ms. Every set of data includes 3 frames of data, with meaning as follows:

Large Screen Data Frame Waveform Diagram

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 X K 3 1 9 0－C 8

The first frame data: flag bit is 0;

X：d0, d1, d2 are position of decimal point（0－3）；
Y：d3－weight signal（1－negative；0－positive）
；
d4－gross/net weight（1－net weight；0－gross weight）；
G17, G16：binary data；
The second frame data: flag bit is 0；
G15 ～ G8：binary data；
The third frame data: flag bit is 1；
G7 ～ G0：binary data；
G0 ～ G17： 18-bit binary code of weight in order from low to high

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Annex 3 Serial Communication－Data Format of Command
Response Mode
AD: indicator address（for example: A(ASCII code is41)）
XH: check high four-bit；
XL: check low four-bit.
Note:
（1） The address is 1～26 when setting the indicator, and the corresponding address during communication
is A～Z;
（2） The command A～H is also sent in ASCII format.
Please refer to the following table in respect of the meaning of various letter command and their
communication format:
Command Meaning Format Example
Send by PC Handshake 02 AD 41 XH XL 03 02 41 41 30 30 03
A Send by 02 AD 61 XH XL 03 02 41 61 32 30 03
Handshake
indicator
Send by PC Read gross weight 02 AD 42 XH XL 03 02 41 42 30 33 03
B Send by 02 AD 62 ** ** ** ** ** ** 02 41 62 2B 30 30 31 2E 30 30
Send gross weight
indicator ** ** XH XL 03 30 32 37 03(1.000)
Send by PC Ret net weight 02 AD 43 XH XL 03 02 41 43 30 32 03
C Send by 02 AD 63 ** ** ** ** ** ** 02 41 63 2B 30 30 30 2E 30 30
Send net weight
indicator ** ** XH XL 03 30 32 37 03(0.000)
Send by PC Read tare 02 AD 44 XH XL 03 02 41 44 30 35 03
D Send by 02 AD 64 ** ** ** ** ** ** 02 41 64 2B 30 30 31 2E 30 30
Send tare
indicator ** ** XH XL 03 30 32 31 03(1.000)
Send by PC Tare 02 AD 45 XH XL 03 02 41 45 30 34 03
E Send by 02 AD 65 XH XL 03 02 41 65 32 34 03
Tare
indicator
Send by PC Zero setting 02 AD 46 XH XL 03 02 41 46 30 37 03
Zero setting successful: Zero setting successful:
02 AD 66 XH XL 03 02 41 66 32 37 03
F Send by
Zero setting Zero setting conditions not Zero setting conditions not
indicator
satisfied: satisfied:
02 AD 69 XH XL 03 02 41 69 32 38 03
Send by PC Startup 02 AD 47 XH XL 03 02 41 47 30 36 03
G Send by 02 AD 67 XH XL 03 02 41 67 32 36 03
Startup
indicator
Send by PC Stop 02 AD 48 XH XL 03 02 41 48 30 39 03
H Send by 02 AD 68 XH XL 03 02 41 68 32 39 03
Stop
indicator

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X K 3 1 9 0－C 8

33