CAS SW-1S Series User manual

SW-1S/1C/1W Service
Manual
1 2/28/2011
SW-1S/1C/1W SERVICE MANUAL
(Revision 0.1 / 2008.06.17)

SW-1S/1C/1W Service
Manual
2 2/28/2011
< Table of Contents >
1. Introduction ............................................................................................................................... 3
1.1. Preface .................................................................................................................................... 3
1.2. Precaution............................................................................................................................. 3
1.3. Specifications...................................................................................................................... 4
1.4. Key............................................................................................................................................. 6
1.5. Dimension.............................................................................................................................. 6
1.6. Sealing Method................................................................................................................... 8
2. Calibration................................................................................................................................. 10
2.1. General Calibration........................................................................................................ 10
2.1.1. C4 Setting ........................................................................................................... 11
2.1.1.1. C4-1 Setting................................................................. 11
2.1.1.2. C4-3 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 PCB.............................................................................................................. 16
3.2.2. Power Part (Main PCB)....................................Error! Bookmark not defined.
3.2.3. Rear Display PCB............................................................................................ 17
4. Exploded View......................................................................................................................... 18
5. Load Cell drawing.................................................................................................................. 20
6. Part Location............................................................................................................................ 21
6.1. Main PCB (Top) ................................................................................................................ 21
6.2. Main PCB (Bottom) ........................................................................................................ 22
6.3. Rear Display PCB (Top)............................................................................................... 23
7. Error Messages & Solution............................................................................................... 24
8. Part List....................................................................................................................................... 25

SW-1S/1C/1W Service
Manual
3 2/28/2011
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-1S/1C/1W 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.

SW-1S/1C/1W Service Manual
4 2/28/2011
1.3. Specifications
SW-1S/1C/1W-
02 SW-1S/1C/1W- 05 SW-1S/1C/1W- 10 SW-1S/1C/1W- 20 SW-1S/1C/1W- 30
Resolution
Capacity / e
Dual Interval
1 kg / 0.0005 kg
2 kg / 0.001 kg
Dual Interval
2.5 kg / 0.001 kg
5 kg / 0.002 kg
Dual Interval
4 kg / 0.002 kg
10 kg / 0.005 kg
Dual Interval
10 kg / 0.005 kg
20 kg / 0.01 kg
Dual Interval
15 kg / 0.005 kg
30 kg/ 0.01kg
Internal 1 / 60,000 1 / 60,000 1 / 60,000 1 / 60,000 1/60,000
External 1 / 2,000 1 / 2,500 1 / 2,000 1 / 2,000 1 / 3,000
Max. Tare - 0.9995 kg - 2.449 kg - 3.998 kg - 9.995 kg - 14.995 kg
Display 110 x 35[mm]/43" x 13.8" 5 digit LCD
Indicators STABLE, ZERO, TARE, g, kg, lb, oz, Low Battery
HI / OK / LO & PCS (SW-1C only)
Keys ZERO, TARE, HOLD(Hold Ver.), UNIT(Unit Ver.), MODE(SW1C), POWER
Functions
Weighing, WaterProof level IP66(SW-1W only)
Hold(Hold Ver.), Unit Conversion(Unit Ver.),
Counting-Counting SampleRange :
10~100,200,300,400,500 (SW-1C only)
Weight Comparison Function : hi, ok, low(SW-1C only)
Sleep Mode Function
Dimension 260(W) x 287(D) x 137(H)[mm] / 102(W) x 113(D) x 54(H)[inch]
278(W) x 317(D) x 141(H)[mm] / 109(W) x 125(D) x 56(H)[inch]
(SW-1W : WaterProof Type)
Platter Size 230(W) x 190(D)[mm] / 90.55(W) x 74.80(D)[inch]
247(W) x 195(D)[mm] / 97.24(W) x 76.77(D)[inch]
(SW-1W : WaterProof Type)
Weight 2.8kg
3.7kg(SW-1W : WaterProof Type)
Power 1.5V x 6 units (D size Battery) or 9V Adapter
Op.Temperature -10°C ~ +40°C / 14°F ~ 104°F
Options 9V Adapter 300mA, Rear Display, Stainless Tray (SW-1S, SW-1C)

SW-1S/1C/1W Service Manual
5 2/28/2011
Minimum Voltage
Level The Battery About 5.5V
Operation time Approx. 500hours (Manganese battery)/
1000hours (Alkaline at 20°C /68°F)

SW-1S/1C/1W Service
Manual
6 2/28/2011
1.4. Key
Key Function
ZERO (-O-)
[Set]
To set zero point
To do [SET] key in the SETUP mode.
TARE To input or cancel the tare (the weight of container).
HOLD To make the weight of item stable. This weight is average value.
POWER To turn on or off.
1.5. Dimension
1.5.1. SW-1S/1C

SW-1S/1C/1W Service
Manual
7 2/28/2011
1.5.2. SW-1W

SW-1S/1C/1W Service
Manual
8 2/28/2011
1.6. Sealing Method

SW-1S/1C/1W Service
Manual
9 2/28/2011

SW-1S/1C/1W Service
Manual
10 2/28/2011
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.
Calibration Mode: Pressing and holding “Calibration Switch” press [POWER] key.
It displays “CAL-0” after “CAL”, and it blinks the version of scale three times.
Selecting menu: press [TARE].
ENTER(Setting) : [TARE] key
MODE Function
CAL 1 Display normalized AD
CAL 2 Display Keypad infomation-
CAL 3
Calibration
‘Zero’ key to select
‘ZERO’ ‘Zero’ key to proceed
‘Midup’ (Refer to table in 2.1.2. C-3) ‘Zero’ key to proceed
‘Full’ Full weight ‘Zero’ key to proceed
‘Middn’ (Refer to table in 2.1.2. C-3), ‘Zero’ key to proceed
CAL 4 Option Setting ( Refer to Table 1)
CAL 5 Display filtered Raw AD
CAL 7 % Calibration
CAL 8 Battery calibration
CAL 9 Gravity constant
CAL 10 Set calibration factor
Refer to 2. 1. 4
CAL 11 Set nation(00 : OIML , 01 : NTEP , 02: KOREA)