Excell KWH3 User manual

Weighing Scale
10key&12key
User Manual
©EXCELL PRECISION CO., LTD. 2020. All rights reserved worldwide.
The information contained herein is the property of EXCELL PRECISION CO., LTD. and is
supplied without liability for errors or omissions. No part may be reproduced or used except
as authorized by contract or other written permission. The copyright and the foregoing
restriction on reproduction and use extend to all media in which the information may be
embodied.

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Table of Contents
PRECAUTIONS FOR USE..................................................................................................2
PREPARING TO USE THE SCALE ....................................................................................2
CHAPTER 1 INTRODUCTION ............................................................................................4
1-1 FEATURES....................................................................................................................4
1-2 DISPLAY DESCRIPTION ..................................................................................................5
1-3 KEYPAD FUNCTIONS DESCRIPTION.................................................................................6
1-4 POWER DESCRIPTION ...................................................................................................7
1-5 ERROR MESSAGES .......................................................................................................7
CHAPTER 2 GENERAL OPERATION DESCRIPTION.......................................................8
2-1 BACKLIGHT FUNCTION...................................................................................................8
2-2WEIGHING MODE..........................................................................................................8
2-2-1 Units Selection ....................................................................................................8
2-2-2 Check Weighing Mode For 12key model........................................................8
2-2-3 Totalizing...........................................................................................................11
2-2-4 Zero Function....................................................................................................11
2-2-5 Tare Function....................................................................................................12
2-3 COUNTING FUNCTION..................................................................................................13
2-3-1 Sampling ...........................................................................................................13
2-3-2 Check Weighing................................................................................................13
2-3-3 Totalizing...........................................................................................................13
CHAPTER 3 GENERAL FUNCTION SETTING.................................................................14
3-1 CHECK WEIGHING CONFIGURATIONS............................................................15
3-2 RS-232 INTERFACE OUTPUT SETTING (OPTION)............................................16
3-3 EXIT FUNCTION SETTING MODE ...................................................................23
3-4 INTERNAL VALUE DISPLAY MODE...................................................................23
3-5 GVALUE CALIBRATION.............................................................................24
3-6 ID CODE SETTING..................................................................................25
3-7 PRINT KEY ( ) FUNCTION SETTING ..................................................26
3-8 PRINTING ORDERS WHEN IS SET AS OR .....27
APPENDIX 1 7-SEGMENT DISPLAY CHARACTERS......................................................29

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Precautions for Use
1. Please keep scale in a cool and dry place. Do not store under high temperatures.
2. Please keep the scale clean and free from insect infestation.
3. Avoid impacting with other items or overloaded with excessively heavy weights
(The load must not exceed the maximum capacity of the scale).
4. If the scale is not going to be used for some time, please clean it and store it in a
plastic bag in dry condition. A desiccant sachet may be included to prevent
moisture from building up.
5. Do not mix different types of dry battery or mix used dry batteries with new dry
batteries.
6. Recommendation: Use this product in an environment with altitude up to 2000m.
7. Any suggestion is warmly welcome.
Preparing to Use the Scale
1. Locate the scale on a firm level surface free from vibrations for accurate weight
readings. Adjust the four leveling feet to centre the leveling bubble on the scale.
2. Avoid hot sunshine directly on the scale or near the exhaust port of ventilating
system.
3. Please use a separate power source plug, to avoid the disturbance of other electric
appliance.
4. There should be no weight on the scale when power is turned on.
5. Commodity should be placed at the centre of platter when being weighed, and its
size should not exceed the dimension of the platter.
6. Please warm the scale 15 ~ 20 minutes before using.
7. Please note that when symbol appears on the screen, the scale needs to be
recharged.
8. Introduction of Storage Battery：
Thank for your purchasing of our EXCELL Weighing
Scale. To guide you to use our product correctly, please
read this User Manual carefully to extend the life of
machine and to avoid error.

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No Burning
Caution Corrosion
Due to the storage battery adopt the advanced free-maintaining technique, customers need
not to replenish electrolyte.
The scale should be recharged every 3 months to prevent failure of the internal
rechargeable battery.
1. The battery should be charged for 8~10 hours.
2. The temperature of battery should below 45℃.
Maintaining
1. Please do not discharge with over-current when using the battery. Please charge the
battery after discharging current.
2. Please take down the battery when the scale is not used for a long time or break the
connection of cathode.
3. Do not short the battery terminals to check whether there is current. Please check
whether the connection point is firm to guarantee good connection.
4. The battery should be replaced by specialized person. No reverse-battery or the
product will be damaged.
a) Anode of battery should be connected with Anode of product battery（usually red
cable）
b) Cathode of battery should be connected with Cathode of product battery (usually
brown cable or black cable)
c) See the picture following
Safety Warnings
1. The electrolyte of battery is caustic which causes metal, cotton, etc to corrode.
2. The hydrogen will be resolved when using or charging the battery and it will cause
explosion when approaches fire.
Brown cable(or black cable)
connected with Anode of
battery
Red cable connected with
Cathode of battery
Warning Explosion
Children Faraway

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Chapter 1 Introduction
1-1 Features
1. High performance A/D converter
2. According to different resolution to do linearity calibration
Ordinary resolution models (below 10000)
Do specification calibration first then do weight calibration
High resolution models (10000~30000)
Do linearity calibration firstspecification calibration weight calibration at last
3. One group of RS232 (option)
4. 4 HOLD functions (contain animal scale HOLD function)
5. LCD display
6. Adapter or rechargeable battery
7. Blackout automatically in order to keep the system stable
(When battery voltage is lower than system voltage, the system will cut the power off
automatically to ensure its stable and accuracy.)
8. LED BACKLIGHT

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1-2 Display Description
Changes of “Range” indication mode
The indicator with 2-segment specification:
6 is Range 1 5 is Range 2
:
High limit value
:
OK value (The value between HI and LO limit value)
:
Low limit value
:
“Zero”indication
:
“Net weight” indication
:
“Low battery power”indication
1
:
“Stable” indication
2
:
“Pre-tare mode”indication
3
:
“Totalizing mode”indication
4
:
No function
5
:
“Samples insufficient” indication
6
:
“Unit weight insufficient” indication
7
:
“Viss” unit (Burma unit)
:
“kg” unit
:
“lb” unit
:
No function
:
Counting mode
:
Percent indication (no functions)

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1-3 Keypad Functions Description
10-key model does not have key and key.
:
Press this key to select the required unit from the preset units.
:
Press this key to preset the weight and quantity.
:
Press this key to accumulate the weight value or others.
:
Press this key to tare (deduct the container weight)
:
Press this key to preset tare value.
:
Press this key to recall the totalization value, preset value and pre-tare
value.
:
Press this key to clear the totalization value, preset value and pre-tare value.
:
Press this key to zero the scale.
:
Press this key to print the total data and to confirm.
:
Press this key to input the numbers (0 ~ 9) and to light up the backlight.
:
Press this key to go into counting mode.
:
Press this key to sample.

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1-4 Power Description
Power Selection
1. 6 V / 4 Ah Rechargeable battery
2. 100~240 V AC
Power Consumption
Indicator + L/C + no backlight
27 mA
indicator+ L/C + front display
backlight
37 mA
Low Power Alarm
Please note when the ( ) symbol keeps flashing on the left down corner of the
display, the batteries should be recharged.
The scale will turn off automatically after a few hours when the low battery warning symbol
shows up. The scale must be fully recharged, before operating again.
Please recharge at once when the symbol shows in order to keep the weight
accuracy.
1-5 Error Messages
Weight exceeds 9d of maximum capacity. (d=division)
Zero point positive deviation after power on exceeds +10% FS (i.e. zero point
deviation over 10% of full scale [max. capacity] above calibration zero point).
Zero point negative deviation after power on exceeds -10% FS (i.e. zero point
deviation over 10% of full scale [max. capacity] below calibration zero point).
Unstable zero return, unstable over 10 sec. Press to leave E4.
Zero is too high when calibrating. (over internal value350,000)
Zero is too low when calibrating. (under internal value 80,000)
----- If there is no Tare or Pre-tare, the weight is less than -20d.

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Chapter 2 General Operation Description
2-1 Backlight Function
Press key to select the display backlight mode:
.“Auto Backlight” mode. When the weight is over 10d or any key is
pressed, the display backlight will be switched on. When the
weight returns to zero (the weight on platform is less than 10d),
the display backlight will switch off after 10 seconds.
.Display backlight is on all the time.
.Display backlight is off.
2-2 Weighing Mode
2-2-1 Units Selection
1. After indicator is turned on, use key to select a unit from kg, lb, tael or
viss, as the screen indicated.
2. The selected unit will be memorized when you turn the indicator off. And the
memorized unit will appear after you turn on the indicator next time.
2-2-2 Check Weighing Mode For 12key model
1. Preset “ High limit”, “Low limit” and “ Beeper value” operation
Use and key to preset values.
For example:
Preset “Low limit” ( Low limit 10d ) e.g. Low limit = 20 kg
Press key the display shows.
Press key 1 time the display shows .
Press key 2 times the display shows .
Press key 4 times the display shows . 
Preset “High limit” ( High limit Low limit ) e.g. High limit = 25 kg
Press key 1 time the display shows.
Press key 1 time the display shows .
Press key 2 times the display shows .
Press key 1 time the display shows .
Press key 5 times the display shows .
Press key 3 times the display shows . 

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Preset “Beeper value” ( Refer to NOTE ) e.g. Beeper value = 22
Press key 1 time the display shows 
Press key 2 times the display shows 
Press key 1 time the display shows 
Press key 2 times the display shows 
Press key 1 times the display shows .
Preset Single point (preset low limit only):
After “preset low limit” procedures is completed and the display shows.
, then press key again, the display shows . . This means that the
“preset single point” procedure is completed.
NOTE
_ _ _ xx
A B
ASetting for the status that LCD is on and the beeper beep:
0 = When stable, the beeper beeps and LCD is on.
1 = When stable, the beeper beeps; whether stable or not, LCD is on.
2 = Whether stable or not, the beeper beeps and LCD is on.
3 = Activates alarm mode. When the weight is over High Limit and stable, the
LCD indicator is on, and RelayCard is activated.
B Setting for the beep status:
0 = No beep
1 = OK (when the weight is over Low Limit & under or equal to High Limit.),
the beeper beeps.
2 = When the weight is under or equal to Low Limit & over High Limit, the
beeper beeps.
Under Status in Preset Low Limit (preset single point only)
The BEEP, LCD mode should be fixed as follows:
When over “Low Limit”, the beeper beeps and is off
Whether stable or not, the beeper beeps and LCD indication is on

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Alarm Mode Settings:
Sets High Limit (weight alarm limit). Low Limit is disabled (you can be freely set
any Low Limit value without any effect). The beeper setting is 32.
32
A 
When weight alarm limit is reached, RelayCard (HIGHT) is activated with one
weight totalizing. When weight returns to zero, the weight alarm is deactivated (the
LCD indication is off, and RelayCard returns to normal). Totalized weight values
range from [000.000] to [999999].
Clearing Alarm Totalized Weight Values:
Press key followed by key, then all totalized weight values are cleared.
When switching among weighing, counting, and alarm totalizing modes, or when
changing among the weighing units, totalized weight values are automatically
cleared.
After turning off the electronic scale, totalized weight values are automatically
cleared.
LCD indication:
    
 
10d Low Limit High Limit
◆To exit preset mode, please press key.
2. Recall Check-weighing Values
Press key then press key Recall “Low limit value”
Then press key again Recall “High limit value”
Then press key again Recall “Beeper value”
Then press key again Back to the beginning
3. Clearing Check-weighing Values
Press key then press key, and then press key Recall “Low limit value”
Then press key again Clear “High limit value”and “Beeper value”
Press key then press key 6 times continuously Clear all values.

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2-2-3 Totalizing
1. Weight Totalizing
Place goods on the platter, after stable and press key to save the weight value.
Then the display shows the total number of additions and the totalized weight value.
And the (M+) indication “” will flash on the display. The indicator will recover to show
the weight value of the goods on the platter after 3 seconds and the (M+) indication
“” is on.
The indicator allows the next totalizing operation, even when the weight value does
not return back to zero. The key is functional, when the weight value changes
by more than 10d. The indicator will save the totalized weight value after the weight is
stable.
The indicator can totalize positive or negative weight but can‟t do both at the same
time. The totalized weight store must be reset to zero before it is possible to select
positive or negative totalizing mode.
The totalizing function can be used up to a maximum of 9999 times before it must be
reset. The totalizing display is limited to 6 digits maximum.
When totalizing, RS-232 will also output. ( Refer to F5 setting)
2. Clear Totalized Weight Values
Press then key to clear all totalized weight values.
When changing between weighing and counting mode, or selecting weighing unit,
the indicator will automatically clear all the totalized weight values.
The indicators will automatically clear all the totalized weight values after turning
on.
3. Recall Totalized Weight Values
Press key to display the total number of additions and the totalized weight
value.
And the (M+) indication “”will flash on the display. The indicator will return to the
weighing mode after 3 seconds.
The indicator will not display the negative sign “-” for negative totalized weight values
when recalling a totalized weight value, but when printing, the negative sign “-” will be
printed out (transmitted serially) for each negative weight and negative totalized
weight.
2-2-4 Zero Function
Press key to re-zero the display with no load on the platter. When zero is set,
the (→0←) symbol will be displayed.

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2-2-5 Tare Function
1. When the weight of the container is unknown ( )
Place the container on the platter, after stable and press key, the weight
value returns to zero and net indication (Net) is on.
Place goods into the container, then the indicator shows the net weight of goods.
Clear tare value
When removing the container and goods, the display shows the negative weight
value of the container. Then press key to clear tare value. The indicator
returns to zero and net indication (Net) is on.
Recall tare value
Press then key the display shows tare value
Multiple tare operation Users can continuously increase or decrease the tare value
by pressing the key.
The total tare value (tare value + pre-set tare value) can equal the full capacity of the
indicator.
2. When the weight of the container is known ( )
Press key and the display shows..
Use and keys to input weight value of the container. After finishing
the procedures, the net indication (Net) and pretare indication “”is on.
Place goods into the container, then the indicator shows the net weight of goods.
Clear pretare value
Press then key, and then press key to clear pretare value.
When the indicator returns to zero, net indication (Net) and pretare indication “”
are off.
Recall pretare value
Press then key the display shows pretare value
In Tare mode, the Preset tare function is disabled.
The indicators with two weighing ranges can NOT pre-set the tare value larger than the
first weighing range. For example: a 30 kg indicator is set by two weighing ranges. The
first range is 0 to 15 kg, and the second range is 15 to 30 kg. The pre-set tare value can
not be larger than 15 kg.

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Pcs
.
..
...
....
2-3 Counting Function
2-3-1 Sampling
Press key to select sample quantity from 10, 20, 50,100 and the display
shows , , ,accordingly.
Select sample quantity and then place samples on the platter, and then press
key,the display shows “ ”.
After stable, the scale enters into counting mode and the display shows sample
quantity.
Sample Too Small ( ) Sample is less than 20 divisions.
Unit Weight Too Small ( ) Unit weight is less than 0.2 division.
(0.1 d for Brazil regulation)
When sampling, the above two symbols indications are on. Under such conditions,
the scale can still work, but may result in lower count precision.
When using 2-segment weighing mode, the above two symbol indications change to
Range 2 and Range 1 and the two symbol indications are off.
2-3-2 Check Weighing
Refer to the operation of check weighing in weighing function.
2-3-3 Totalizing
Refer to the operation of totalizing in weighing function.

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Chapter 3 General Function Setting
Switch on the scale. While the scale is counting down to zero, press and hold key
until the display shows the software program version number
Release the key, the scale enters into the configuration setting mode and
is showed on the display.
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Press key
Reserved
Reserved
Reserved
Reserved
Check-weighing configurations
RS-232 Interface output Setting
Exit setting mode
Internal value display mode
Reserved
Reserved
G Value adjustment
ID code setting
Print key ( ) function setting
Reserved
Printing orders when is set as
or
Reserved

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Press key
Press key
Press key
Press key
3-1 Check Weighing Configurations
If is set, accessing to is denied.
Use or key to select F4 function the display shows
Preset “LO value”
(LO value 10d)
Press and
key to set “ LO value”
E.g. LO value = 2 kg
Preset “HI value”
(HI value LO value)
Press and
key to set “HI value”
E.g. LO value = 2.5 kg
Preset “Beeper value”
Press and
key to set “HI value”
E.g. Beeper value = 22
.kg
.kg
Press key for 5 times
to clear HI, OK, LO values
Press key
.kg
key = Increase the flash value by one (from 0 to 9)
key = Confirm key
.
kg

AB
A 0 = After stable, the beeper beeps, and the
indications are on.
1 = After stable, the beeper beeps; whether
stable or not, the indications are on.
2 = Whether stable or not, the beeper beeps
and the indications are on.
3 = Weight alarm mode activation: When
over High limit and stable, the indications
are on, and RelayCard is activated.
B 0 = No beep
1 = OK (when the weight is between Low limit
& High limit), the beeper beeps.
2 = When the weight is under or equal to Low
limit (must be over 10d) & over or equal
to High limit, the beeper beeps.
LCD indication description:

 
10d Low limit value High limit value
.kg
kg
kg

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3-2 RS-232 Interface Output Setting (option)
Use or key to select function the display shows
key = Increase the flash value by one (from 0 to 8) or
selecting baud rate from 1 200, 2 400,4 800 and
9 600(default setting)
key =Confirm key
No transmission
Stable transmission *
Continuous transmission *
Press key to transmit in simple mode. *
Press key to transmit in complete mode. *
Stable transmission in totalizing mode.
The format is as same as *
Refer to *
Refer to *
Press key to transmit
The format is as same as
and *
Continuous transmission, specific format
or transmit specific format
Print after Removing Goods (5% Mode)
Print after Removing Goods (OK Mode)
Continous Transmission (Bluetooth Mode)
Stable transmission (transmits only
weight digits)
* : RS-232 is open
Press key
The display shows the default
setting of transmission mode
Press key
Select transmission mode
(from 0 ~ 8 )
Press key
The display shows the default
setting of RS-232 baud rate
Press key
Select RS-232 baud rate
(1 200, 2 400, 4 800,9 600)

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RS-232 Interface Format
I . Mode:UART Signal of EIA-RS0232 C
II . Format :
1. Baud rate : 1 200, 2 400, 4 800, 9 600 bits/second
2. Data bits :8 bits
3. Parity bit : None
4. Stop bits :1 bit
5. Code :ASCII (Exchange code of American standard)
Start bit Data bits Stop bit
RS-232 Data Format
Stable transmission ( ), Continuous transmission ( ),
Press key to transmit ( )
(1) gram as weight unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
g
HEAD , HEAD , ± DATA UNIT CR LF
(2) kg or lb as weight unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
kg/l
b
HEAD , HEAD , ± DATA UNIT CR LF
(3) lb.oz as weight unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Lb.oz
HEAD , HEAD , ± DATA UNIT CR LF
(4) HK tael as weight unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
HK
tael
HEAD , HEAD ,± DATA UNIT CR LF
(5) viss as weight unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
viss
HEAD , HEAD , ±DATA UNIT CR LF

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HEAD1 ( 2 BYTES )
HEAD2 ( 2 BYTES )
OL - Overload , Under load
TR - TARE Mode
ST - Display is Stable
N - NET Mode
US - Display is Unstable
G - GROSS Mode
DATA ( 7 or 8 BYTE )
2B ( HEX ) = “ +” ( PLUS)
2D ( HEX ) = “ –” ( MINUS )
2E ( HEX ) = “ .”( DECIMAL POINT )
UNIT ( 2、3 or 4 BYTE )
kg
=
6B ( HEX )
；
67 ( HEX )
lb
=
6C( HEX )
；
62 ( HEX )
tl.T
=
74 ( HEX )
；
6C ( HEX )
；
2E ( HEX )
；
54 ( HEX )
hkg
=
68 ( HEX )
；
67 ( HEX )
viss
=
76 ( HEX )
；
69 ( HEX )
；
73 ( HEX )
；
73 ( HEX )
Transmission examples:
Data format for RS-232 continuous transmission are as below:
1. The gross weight (+0.876 kg) shows as below, after stable: (under no tare mode)
S
T
,
G
,
+
0
.
8
7
6
k
g
0D
0A
HEAD1 , HEAD2 , DATA UNIT C LF
2. The net weight (-1.568 lb) shows as below without weight stability: (under tare mode)
U
S
,
T
R
,
-
1
.
5
6
8
l
b
0D
0A
HEAD1 , HEAD2 , DATA UNIT C LF
3. The net weight (+15.0624 HK tael) shows as below, after stable: (under tare mode)
S
T
,
T
R
,
+
1
5
.
0
6
.
2
4
h
k
g
0D
0A
HEAD1 , HEAD2 , DATA UNIT C LF
4. The net weight (+1.245 viss) shows as below, after stable: (under tare mode)
S
T
,
T
R
,
+
1
.
2
4
5
v
i
s
s
0D
0A
HEAD1 , HEAD2 , DATA UNIT C LF