CAS ED Series User manual

ED Service Manual
1 04/12/10
ED SERVICE MANUAL

ED Service Manual
2 04/12/10
< Table of Contents >
1. Introduction ............................................................................................................................... 4
1.1. Preface .................................................................................................................................... 4
1.2. Precaution............................................................................................................................. 4
1.3. Specification ........................................................................................................................ 5
1.4. Sealing Method................................................................................................................... 7
2. Calibration................................................................................................................................... 9
2.1. General Calibration.......................................................................................................... 9
2.1.1. C4 Setting ........................................................................................................... 10
2.1.1.1. C4-1 Setting................................................................. 10
2.1.1.2. C4-2 Setting................................................................. 10
2.1.1.3. C4-3 Setting................................................................. 10
2.1.1.4. C4-4 Setting................................................................. 11
2.1.1.5. C4-5 Setting................................................................. 11
2.1.2. SPAN Calibration Setting (C-3).............................................................. 12
2.1.3. Gravity Constant Value Setting (C-9)................................................ 12
2.1.4. Calibration factor Setting (C-10).......................................................... 13
2.1.5. Displaying Real A/D Value (C-5).......................................................... 13
2.1.6. Percent Calibration (C-7).......................................................................... 14
2.1.7. Battery Calibration (C-8)........................................................................... 14
3. The Schematics and Diagram......................................................................................... 15
3.1. System Block Diagram................................................................................................. 15
3.2. Circuit Diagram ................................................................................................................ 16
3.2.1. MAIN...................................................................................................................... 16
3.2.2. DISPLAY & MODULE ................................................................................................. 17
4. Exploded View......................................................................................................................... 18
5. Load Cell drawing.................................................................................................................. 19
6. Part Location............................................................................................................................ 20
Main PCB Part Location................................................................. 20
COMMON PCB........................................................................................................................... 22
RS-232 MODULE PCB Part Location............................................... 22
RS-232 PCB (TOP)................................................................................................................. 22
RS-232 PCB (BOTTOM)....................................................................................................... 22
KEY PCB Part Location .................................................................. 23
KEY PCB......................................................................................................................................... 23
7. Error Messages & Solution............................................................................................... 24

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8. Part List....................................................................................................................................... 25

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1. Introduction
1.1. Preface
Thank you for purchasing of our CAS scale.
This scale has been designed with CAS reliability, under rigid quality control
and with outstanding performance.
WE hope that your departments enjoy with high quality of CAS product.
This manual will help you with proper operations and care of the ED series.
Please keep it handy for the future references.
1.2. Precaution
•Make sure that you plug your scale into the proper power outlet.
•Place the scale on a flat and stable surface.
•Plug into a power outlet 30 minutes before operations.
•Keep the scale away from strong EMI noises may cause incorrect weight readings.
•This scale must be installed in a dry and liquid free environment.
•Do not subject the scale to sudden temperature changes.
•Do not subject the platter to sudden shocks.
•If the scale is not properly level, please adjust the 4 legs at the bottom of the
scale (turn legs clockwise or counterclockwise) so as to center the bubble of the
leveling gauge inside the indicated circle.

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1.3. Specification
MODEL
ED 3 ED 6 ED 15 ED 30
CAPACITY
1.5kg/0.0005kg
3kg/0.001kg 3kg/0.001kg 6kg/0.002kg 6kg/0.002kg 15kg/0.005kg 15kg/0.005kg 30kg/0.01kg
3lb/0.001lb
6lb/0.002lb 6lb/0.002lb 15lb/0.005lb 15lb/0.005lb 30lb/0.01lb 30lb/0.01lb 60lb/0.02lb
50oz/0.02oz
100oz/0.05oz 100oz/0.05oz 200oz/0.1oz 250oz/0.1oz 500oz/0.2oz 500oz/0.2oz 1000oz/0.5oz
TARE
SUBTRACTION
1.4995kg 2.999kg 5.998kg 14.995kg
2.999lb 5.998lb 14.995lb 29.99lb
49.98 oz 99.95 oz 249.9 oz 499.8 oz
INTERNAL
RESOLUTION 1/60,000 1/60,000 1/60,000 1/60,000
EXTERNAL
ESOLUTION DUAL 1/3,000
DISPLAY LCD 6 digits
DISPLAY LAMP STABLE, ZERO, HOLD, NET, HI/OK/LO, lb, oz
%, PCS, SUM, kg, Low Battery
INTERFACE RS-232C(Printer)
POWER SOURCE DC 12V 1.25A Adaptor
6V 3.6AH Pb Battery
TEMPERATURE
RANGE -10°C ~ +40°C
PLATTER SIZE (W
D)mm 306 (W) X 222 (D)
PRODUCT SIZE (W
D H)mm 330 (W) X 346 (D) X 107 (H)
MINIMUM
VOLTAGE LEVEL OF
THE BATTERY About 5.6V

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Display Three LCDs with 6 digits, POWER LED
Power 12 V Adaptor or PB BATTERY (6V3.6AH/20HR)
Option Backlight
Auto Power Off

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1.4. Sealing Method

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2. Calibration
2.1. General Calibration
Pressing and holding calibration switch press [POWER] key to go to calibration mode.
User can move to other mode by using [ZERO] key in the calibration mode.
User also moves to other sub-modes for each mode by using [TARE] key.
Please simply follow below procedure to move to other mode.
(1) Calibration Mode: Pressing and holding “Calibration Switch” press [POWER] key.
(2) It displays “CAL-0” after “CAL”, and it blinks the version of scale three times.
(3) Selecting menu: press [TARE].
(4) ENTER(Setting) : [TARE] key
MODE Function
CAL 1 Display normalized AD
CAL 2 Display Keypad infomation-
CAL 3
Weight Setting Mode
“UnLoad”  [TARE] 
“MIDD”  [TARE] after loading for 1/3 weight 
“FULL”  [TARE] after loading for Full weight 
“MIDD”  [TARE] after loading for 1/3 weight  “END”
CAL 4 Option Setting ( Table 1 참조 )
CAL 5 Display filtered Raw AD
CAL 6 Function setting on each Key ( Table 2 참조 )
CAL 7 % Calibration
CAL 8 Battery calibration
CAL 9 Gravity constant
CAL 10
Set calibration factor
“Unit” Æ[TARE] Æselect 0, 1 (0:kg, 1: lb) Æ[TARE]
“CAPA” Æ[TARE] Æselect capacity Æ[TARE]
“MCAPA” Æ[TARE] Æselect mid-capacity Æ[TARE]
“W-dP” Æ[TARE] ÆSelect Decimal Point Æ[TARE]
“ 1 d ” Æ[TARE] ÆSelect division Æ[TARE]
“Dual” Æ[TARE] ÆEnable dual interval (0:disable, 1:enable) ÆTARE
CAL 11 Set nation(00 : OIML , 01 : NTEP , 02: KOREA)

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< Modes >
2.1.1.C4 Setting
2.1.1.1. C4-1 Setting
BIT 6~7 Initial Zero range
3 5%
2 10%
1 3%
0 2%
BIT5 Tare Type
0 Proper tare
1 Full Tare
BIT4
BIT 2~3 Successive tare
3 (+), (-) Direction successive Tare
2 (-) Direction successive Tare
1 (+) Direction successive Tare
0 One Time tare
BIT1
BIT0
2.1.1.2. C4-2 Setting
BIT7
BIT6 Use PLU Tare 1 Use
BIT5 Use PLU Name
0 Don't use
1 Use
BIT4 Use Daily Total
0 Don't use
1 Use
BIT3 Clear Price
0 Don't clear
1 Clear
BIT2 Clear Tare
0 Don't clear
1 Clear
BIT1 Use Euro
0 Don't use
1 Use
BIT0 Power On Euro 0 No
1 Yes
2.1.1.3. C4-3 Setting
BIT7 Dot Type
0 "." dot
1 "," comma
BIT6 Use Preset tare 0 Don't use

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1 Use
BIT5 Use Back light 0 Don't use
1 Use
BIT4 Use Head message 0 Don't use
1 Use
BIT3 Use gram
0 Don't clear
1 Clear
BIT2 Use oz
0 Don't clear
1 Clear
BIT1 Use lb
0 Don't use
1 Use
BIT0 Use Kg
0 No
1 Yes
2.1.1.4. C4-4 Setting
BIT7 X
BIT6 X
BIT 4~5 Price round off
3 00, 25, 50, 75
2 00, 10, 20
1 0, 5
0 normal
BIT3 X
BIT2 X
BIT 0~1 Unit / Price
3 1000/1
2 100/1
1 10/1
0 1/1
2.1.1.5. C4-5 Setting
BIT7 Use Standby time 0 Don't use
1 Use
BIT6 Price decimal point
7 Special case
6 O.OOOOOO
5 O.OOOOO
4 O.OOOO
3 O.OOO
2 O.OO

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1 O.O
0 O
BIT3 Use Unit message 0 Don't use
1 Use
BIT2 Use Total price window over 0Don't use
1 Use
BIT 0~1 Print type
3 Don't use
2 DEP-50
1
0
2.1.2.SPAN Calibration Setting (C-3)
(1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL
1” message.
(2) Press [ZERO] to display “CAL-3”.
(3) Press [TARE] key and then it displays “zero ” message.
(4) Press [TARE] key and then it displays “midup” message
(5) Load middle weight (ex:1/3 full capacity) on the platform
(6) Press [TARE] key and then it displays “span ” message
(7) Load full weight on the platform
(8) Press [TARE] key and then it displays “middn” message
(9) Load middle weight (ex:1/3 full capacity) on the platform
(10) Press [TARE] key and then it display “CAL 3” message
2.1.3. Gravity Constant Value Setting (C-9)
Current gravitational Acceleration value is set to 9.7994 m/s2 .
(1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays
“CAL-1” message.
(2) Press [ZERO] to display “C-9”.
(3) Press [TARE] key, and then “ G-1“ message and “9.7994” will be shown. The first
digit,”9” will blink.
(4) Input a gravitational acceleration value by using [ZERO] key.
(5) Press [TARE] key, and then “G-2“ message blinks.“9.7994” will be shown. The first
digit,”9” will blink.

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(6) Input a gravitational acceleration value by using [ZERO] key.
(7) Press [TARE] key to save the gravitational acceleration value, and “C-9 ” message
will be shown.
2.1.4.Calibration factor Setting (C-10)
(1) Pressing and holding “Calibration Switch” press [POWER] key.
(2) After “CAL” message blinks three times and shows the version of scale, it displays
“CAL-1” message.
(3) Press [ZERO] to display “C-10”.
(4) Press [TARE] key, and then “UNIT “ message and “0” will be shown. The first digit,”0”
will blink. It means calibration unit is “kg” (0 : kg, 1 : lb)
(5) Input a calibration unit by using [ZERO] key.
(6) Press [TARE] key, and then “CAPA“ message blinks.“0003” will be shown. The first
digit,”0” will blink. It means a full-capability is “3 (calibration unit, kg or lb)”
(7) Input a capability by using [ZERO] key.
(8) Press [TARE] key, and then “MCAPA“ message blinks.“0001” will be shown. The first
digit,”0” will blink. It means a mid-capability is “01 (calibration unit, kg or lb)”
(9) Input a capability by using [ZERO] key.
(10)Press [TARE] key, and then “W-dP “ message blinks.“3” will be shown. The first
digit,”3” will blink. It means a weight decimal point is “3 (will display 0.000)”
(11)Input a weight decimal point by using [ZERO] key.
(12) Press [TARE] key, and then “1d “ message blinks.“0.001” will be shown. The third
digit,”0” will blink. It means a division is “0.001 (calibration unit, kg or lb)”
(13) Input a division by using [ZERO] key.
(14) Press [TARE] key, and then “dual “ message blinks.“1” will be shown. The third
digit,”1” will blink. It means a dual interval is disable. (0 : disable, 1 : enable)”
(15) Input a dual interval enable by using [ZERO] key.
(16) Press [TARE] key to save the calibration factor, and “C-10 ” message will be shown.
2.1.5.Displaying Real A/D Value (C-5)
Display Raw AD

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2.1.6.Percent Calibration (C-7)
(1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL 1”
message.
(2) Press [ZERO] to display “CAL-7”.
(3) Press [TARE] key and then it displays “per 0 ” message. Select the percent value using
the
[numeric] key. You can choose 10~90 percent.
(4) Press [TARE] key and then it displays “zero” message
(5) Press [TARE] key and then it displays “pspan ” message
(6) Load choice percentage weight of full weight on the platform
(7) Press [TARE] key and then it displays “CAL 7” message
2.1.7.Battery Calibration (C-8)
(1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL 1”
message.
(2) Press [ZERO] to display “CAL-8”.
(3) Press [TARE] key and then it displays voltage of battery.
(4) Change the jumper-pin of main PCB, ‘BAT’ to ‘+5V’.
(5) Press [ZERO] key two times and then Press [-] key two times.
And then it display ‘500’
(6) Change the jumper-pin of main PCB, ‘+5V’ to ‘BAT’.
(7) You can see the calibrated voltage of battery.

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3. The Schematics and Diagram
3.1. System Block Diagram

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3.2. Circuit Diagram
3.2.1. MAIN
EX-
+5V,BAT  Jumper
Power_chk
0
BK2
LED_BL
F1 FUSE
CN5_FEMALE1
Pb BAT
1
2
3
BUZZER PART
<Doc> <RevCode>
ED(MODULE Ver.)
A3
33Monday, March 26, 2007
Title
Size Document Number Rev
Date: Sheet of
A_Vcc
CON_RX
L5 220uH
SW2
CAL
R23
10K
C13
470pF
+5V
+5V
S-
R16
100k
C16
1uF
C7 0.01u 3kV
Tx
D2
KDS184 21
3
D1
1N4004
Power_con
CN4 1
2
3
4
5
C12
470uF/35V
L7 220uH
BK1
LED_BL
S1
ON/OFF
C7
1uF
CON_RX
C5
0.1uF
A_Vcc
R14
100K
C2
0.1uF
D5
SS14
C10
1uF
C15
0.1uF
S+
BUZZER1
D7
SS14
R18
100K
Rx
R25
100
D4 SS14
U2 XC6204C502MR
1
2
35
VIN
VSS
CE VOUT
CN5_MALE1
BAT
1
2
3
L3
1 2
L2
1 2
RS232 DRIVER
PART
+5V
R12
100k
Q1
KTA1504
CON_TX
C9
470uF/35V
SIG+
Q2A
2N2222
R9
1k
Power PART
C14
470uF/35V
R15 4.7k
CN2
Adaptor
1
2
U4A
max3232idbre4
6
8
5
13
2
4
9
15
12
7
3
14
1
10
11
16
V-
RIN2
C2-
RIN1
V+
C2+
ROUT2
GND
ROUT1
DOUT2
C1-
DOUT1
C1+
DIN2
DIN1
V_CC
SIG-
+5V
    (+5V , Bat)
R13
100k
CN8
1
2
3
L1
1 2
BT1
Pb 6V/5A
BUZZER
RTC_Power
C8
1uF
D9 1N5406
CHIP BEAD
R21
100K
CN3Power_SW
1 2 3
Back light
U5 LM7809
1 3
2
IN OUT
GND
D6 SS14
R10 100K
Q3 KTA1666
C
B
E
C11
1uF
+5V
+5V
L4
1 2
+
C3
100u/16v
R11
1k
CAL_SWPSEN
LOADCELL PART
Charger
CON_TX
C17 0.01u 3kV
R22
0.22 2W
Bat_chk
R17 R
R20
7.5K R19 10k
L6
220uH
VDD
+5V
BT2
3.3V
CAL PART
+5V
EX+
D3
KDS184
21
3
U4 MC34063A
5
36
4
8
7
1
2
COMP
TCAPVCC
GND
DC
PK
SWC
SWE
LED
0
R24
2k
JP3
1 2
BL_con
PROGRAM PART
+5V

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3.2.2. DISPLAY & MODULE
MODE
S2
SAMPLE
Power_con
S12
S12
P0.1
LCD_WR
Bat_chk
S3
S6
S7
ON/OFF
P2.0
S0 S15
S1
C0
TXD
Rx
S23
PRINT
S11
S20
S2
ZERO
ONE_MODULE
OneModule
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
A_Vcc
A_GND
Bat_chk
P1.6
P1,7
Rx
Tx
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
P2.0
P2.1
P2.2
P2.3
P1.1
AIN+
AIN-
A_GND
P1.0
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
PSEN
I2C_SDA
I2C_CLK
D_Vcc
D_GND
RTC_Power
C2
P0.2
Power_chk TARE
S1
SAMPLE
TARE
ED(MODULE Ver.)
P1.1
S15
S17
S5
S6
S14
S9
S14
C3
U4
HT1621b
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
CS
RD
WR
DATA
VSS
OSCO
OSCI
VLCD
VDD
IRQ
BZ
BZ
COM0
COM1
COM2
COM3
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
D_Vcc
+5V
CN2
1
2
3
4
5
6
7
8
9
10
S19
S4
One Module
C3
I2C_SDA
LCD_DATA R3 100
S16
P1.6
P0.0
R6
10K
LCD_CS
HOLD
S5
P3.7
C1
0.1uF
A_GND
S13
LCD
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
26
27
28
R1 100
S10
S19
ZERO
R4
10K
D_GND
S18
S21
R5
10K
S23
C2
RXD
KEY
CONNECTION
S20
Tx
S22
S0
A_GND
BL_con
PSEN
A_Vcc
P3.2
RTC_Power
S4
LCD_WR
PRINT
SET
S18
<Doc> <Rev Code>
<Title>
A4
13Monday, March 26, 2007
Title
Size Document Number Rev
Date: Sheet of
S9
R2 100
I2C_CLK
S22
S17
C1
S11
CAL_SW
P3.5
S8
LCD_DATA
S21
AIN-
SET
P1.7
AIN+
S3
P1.0
P3.3
LCD_CS
S10
P2.3
HOLD
R8 10
S8
S13
C1
S7
R7
2.2K
Display PART
S16
C0
+5V
P3.4
MODE
BUZZER
P3.6

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4. Exploded View
CAS CO. LAB.
2003.12.29
FOR APPR OV A L

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5. Load Cell drawing
25
112
15
112
S W
(spring elem ent)
2090501 00

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6.Part Location
Main PCB Part Location
zDRAWING NUMBER : 6100-PED-0000
zTOP