CAS SW-2 User manual

`
1
CAS ELECTRICS CO.
,
LTD
SW-II Series
Service Manual
(English)
2016. 06. 27

`
2
CAS ELECTRICS CO.
,
LTD
Table of Contents
1. Introduction......................................................................................................................3
1.1. Preface.....................................................................................................................3
1.2. Precaution ................................................................................................................3
2. Classification.....................................................................................................................4
2.1. Overall View..............................................................................................................4
2.2. Specifications............................................................................................................4
2.3. Display & Key............................................................................................................5
2.3.1. Display.............................................................................................................5
2.3.2. Key Function.....................................................................................................6
2.4. Dimension ................................................................................................................6
2.4.1. Scale ...............................................................................................................6
2.4.2. Loadcell ...........................................................................................................7
2.5. Sealing Method..........................................................................................................7
3. Calibration ........................................................................................................................8
3.1. Calibration Mode ..................................................................................................8
3.2. Span Calibration ...................................................................................................... 11
4. The Schematics and Diagram............................................................................................. 13
4.1. System Block Diagram.............................................................................................. 13
4.2. Circuit Diagram ....................................................................................................... 13
4.3. Interface ................................................................................................................ 13
4.3.1. RS232C Interface (direct)....................................................................................... 13
4.3.2. USB Interface....................................................................................................... 14
5. Firmware Update Method .................................................................................................. 14
6. Exploded Views................................................................................................................ 15
7. Parts List ........................................................................................................................ 16
7.1. Electronic Parts........................................................................................................ 16
7.2. Mechanical Parts...................................................................................................... 17
7.2.1. BODY ASS'Y ......................................................................................................... 17
7.2.2. UPPER CASE ASS'Y................................................................................................ 19
7.2.3. TRAY ASS'Y.......................................................................................................... 19
7.2.4. IMAGE ASS'Y........................................................................................................ 20
7.2.5. PLATFORM ASS'Y................................................................................................... 20
7.2.6. C/T ASS'Y ............................................................................................................ 20
7.2.7. Loadcell Parts....................................................................................................... 21
Revision ............................................................................................................................. 22

`
3
CAS ELECTRICS CO.
,
LTD
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 SW-II.
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.
 Donotsubjectthe plattertosuddenshocks.
 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.

`
4
CAS ELECTRICS CO.
,
LTD
2. Classification
2.1. Overall View
2.2. Specifications
MODEL SW-ΙΙ
Capacity Dual Single Dual Single Dual Single Dual Single
Max
1.5/3kg Max 3kg Max 3/6kg Max 6kg Max 6/15kg Max 15kg Max 15/30kg Max 30kg
e e=0.5/1g
e=1g
e=0.5g
e=0.2g
e=0.1g
e=1/2g
e=2g
e=1g
e=0.5g
e=0.2g
e=2/5g
e=5g
e=2g
e=1g
e=0.5g
e=0.5/1g
e=10g
e=5g
e=2g
e=1g
External
Resolution 1/3000 1/3000~ 1/30000 1/3000 1/3000~ 1/30000 1/3000 1/3000~ 1/30000 1/3000 1/3000~ 1/30000
MAX Tare - MAX
Display 115 x 35 [mm]/45 " x 15.5 " 6 digit LCD
Symbols STABLE, ZERO, TARE, g, kg, lb, oz, Low Battery
HI / OK / LO & PCS
Keys ZERO/ UNIT, TARE/ HOLD , MODE,FUCTION
Functions
Weighing, Hold, Unit Conversion,
Counting-Counting Sample Range :
10, 20, 50, 100,200, 500
Weight Comparison Function : hi, ok, low
Backlight ON/OFF Control Function
Dimensions 250 (W) x 281 (D) x 110 (H)[mm] / 984 (W) x 111 (D) x 43 (H)[inch]
Platter size 226 (W) x 187 (D)[mm] / 88.97 (W) x 73.62 (D)[inch]
Weight 1.8 kg
Power 1.5 V x 3 units (D size Battery), Pb 4V/4Ah, 6V/500mA Adapter
Operation
Time Approx. 300 hours (Manganese battery)/ 600 hours (Alkaline at 20 °C /68 °F)
Operating
Temperature -10 °C ~ +40 °C / 14 °F ~ 104 °F

`
5
CAS ELECTRICS CO.
,
LTD
Option 6 V Adapter 500 mA, Pb 4 V4 A,
Rear Display, RS232, USB, SUS TRAY
2.3. Display & Key
2.3.1. Display
2.3.1.1 LCD Front
2.3.1.1 LCD Rear
2.3.1.3 LED Front
2.3.1.4 LED Rear

`
6
CAS ELECTRICS CO.
,
LTD
2.3.2. Key Function
KEYS FUNCTIONS
Used to set the zero point.
Used to input or cancel the weight of tare.
Used to change the unit of weight, and shown as following
sequence on the display. [Kg] [WL on or off] [PCS] [Kg]
Used to select and hold or unit conversion function
+ Used to convert the unit of weight.
+
Used to make the weight of commodity stable.
This weight is average value.
2.4. Dimension
2.4.1. Scale

`
7
CAS ELECTRICS CO.
,
LTD
2.4.2. Loadcell
2.5. Sealing Method

`
8
CAS ELECTRICS CO.
,
LTD
3. Calibration
3.1. Calibration Mode
SW-II supports two calibration mode.
Cal mode 1: Calibration after the initialization data (Initialization and 3 point calibration)
Cal mode 2: Calibration should only proceed again (3 Point calibration)
Cal mode 3: One Point Calibration Mode
After turning on the power, while the number is changed to "999999", "888888", "777777" on the display, calibration
jumper short to enter the cal mode 1.
Before turning on the scale, calibration jumper already shorted, turn on power and enter the cal mode 2.
After pressing the [ZERO] key and [TARE] key Power ON the display is as follows. Press [MODE] key One Point
Cal mode 3.
For example, for a 3kg scale, when Cal Mode 1 entry, show as follows:
Since it shows the screen as shown below. The meaning of the figure below is shown in Scale setting Table
[TARE] key and change the settings, select the desired settings, press the [ZERO] key.
Capacity Mode Interval e Resolution
3 kg
3000 dual 0.5/1 1/3000
3001 single 1 1/3000
3000.5 single 0.5 1/6000
3000.2 single 0.2 1/15000
3000.1 single 0.1 1/30000
6 kg
6000 dual 1/2 1/3000
6002 single 2 1/3000
6001 single 1 1/6000
6000.5 single 0.5 1/12000
6000.2 single 0.2 1/30000
15 kg 15000 dual 2/5 1/3000
15005 single 5 1/3000

`
9
CAS ELECTRICS CO.
,
LTD
15002 single 2 1/7500
15001 single 1 1/15000
15000.5 single 0.5 1/30000
30 kg
30000 dual 5/10 1/3000
30010 single 10 1/3000
30005 single 5 1/6000
30002 single 2 1/15000
30001 single 1 1/30000
After pressing the [ZERO] key and [TARE] key Power ON the display is as follows. Press [ZERO] key
Parameter Setting Mode. When press [TARE] key, digits shift is possible, pressing the [MODE] key to increase the
number. After finishing the setting, press the [ZERO] key to save, and exit from the menu.
Parameter setting, see below table.
DIGIT Description Value Description
DIGIT 6 Initial Zero range 0 Disable (Non OIML)
1 ±10% (OIML)
DIGIT 5 Vibration Filter 0~9 Filter level
DIGIT 4 Auto Zero Tracking 0~9 0~9 d
DIGIT 3 Zero compensation 0~9 0~9 d
DIGIT 2 Creep compensation 0~9 0~9 d
DIGIT 1 Decimal display 0 : (colon)
1 ; (semi-colon)
If you enter cal mode 2, it appears as below:
you can only calibrate span calibration.
Apart from calibration mode, SW-II supports to change user settings and AD tests such as:

`
10
CAS ELECTRICS CO.
,
LTD
(1) Change your settings
After turning on the power scale, while the display are turned on, press the [TARE] key you can change the
user settings. Press [TARE] key, and move digits (digit shift) is possible, pressing the [MODE] key to
increase the number. After finishing the setting, press the [ZERO] key to save, and exit from the menu.
DIGIT Description Value Description
DIGIT 6 - 0
1
DIGIT 5 Use kg 0 Don't use
1 Use
DIGIT 4 Use lb 0 Don't use
1 Use
DIGIT 3 Use gram 0 Don't use
1 Use
DIGIT 2 Use oz 0 Don't use
1 Use
DIGIT 1 Default Weight
Unit
0 Use kg
1 Use lb
2 Use gram
3 Use oz
(2) AD test function
If after turning on the power scale, press the [MODE] key nit, you can check the AD value. In this case,
press [ZERO] key to exit to the weighing mode.