CAS Corporation SW-1S User manual

SW-1S/1C/1W/1N Service Manual
1 12/18/08
SW-1S/1C/1W/1N
SERVICE MANUAL
(Revision 0.2 / 2008.09.30)

SW-1S/1C/1W/1N Service Manual
2 12/18/08
< Table of Contents >
1. Introduction ............................................................................................................................... 4
1.1. Preface .................................................................................................................................... 4
1.2. Precaution............................................................................................................................. 4
1.3. Specifications...................................................................................................................... 5
1.4. Key............................................................................................................................................. 7
1.5. Dimension.............................................................................................................................. 7
1.5.1. SW-1S/1C/1N .................................................................................................................... 7
1.5.2. SW-1W............................................................................................................................... 8
1.6. Sealing Method................................................................................................................... 9
2. Calibration................................................................................................................................. 11
2.1. General Calibration........................................................................................................ 11
2.1.1. C4 Setting ........................................................................................................... 12
2.1.1.1. C4-1 Setting................................................................. 12
2.1.1.2. C4-3 Setting................................................................. 12
2.1.2. SPAN Calibration Setting (C-3).............................................................. 13
2.1.3. Gravity Constant Value Setting (C-9)................................................ 13
2.1.4. Calibration factor Setting (C-10).......................................................... 13
2.1.5. Displaying Real A/D Value (C-5).......................................................... 14
2.1.6. Model Setting Mode (C-6)......................................................................... 14
2.1.7. Percent Calibration (C-7).......................................................................... 15
2.1.8. Battery Calibration (C-8)........................................................................... 15
3. The Schematics and Diagram......................................................................................... 16
3.1. System Block Diagram................................................................................................. 16
3.2. Circuit Diagram ................................................................................................................ 16
3.2.1. Main PCB.............................................................................................................. 16
3.2.2. Rear Display PCB............................................................................................ 19
4. Exploded View......................................................................................................................... 20
4.1. SW-1S/1C.................................................................................................................................. 20
4.2. SW-1W...................................................................................................................................... 21
5. Load Cell drawing.................................................................................................................. 22
6. Part Location............................................................................................................................ 23
6.1. Main PCB (Top) ................................................................................................................ 23
6.2. Main PCB (Bottom) ........................................................................................................ 24
6.3. Rear Display PCB (Top)............................................................................................... 25
7. Error Messages & Solution............................................................................................... 26

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8. Part List....................................................................................................................................... 27
8.1.1 SW-1S/1C/1W (Electronic part)............................................................................................. 27
8.1.2 SW-1S/1C (Mechanical part).................................................................................................. 32
8.1.3 SW-1W (Mechanical part)...................................................................................................... 35

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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 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.

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1.3. Specifications
MODEL PW-II/2N
Capacity /
e
2kg, e = 1g
5lb, e = 0.002lb
80oz, e = 0.05oz
5kg, e = 2g
10lb, e = 0.005lb
160oz, e = 0.1oz
10kg,e = 5g
20lb,e=0.01lb
400oz,e= 0.2oz
PW-2N only
Dec.
oz 80oz, e=0.05oz 160oz, e=0.1oz 400oz, e= 0.2oz
Frac
t. oz 80oz, e=1/16oz 160oz, e=1/8 400oz, e=1/4oz
Resolutio
n 1/2000 1/2500 1/2000
MAX Tare -2kg -5lb
-80oz
-5kg
-10lb
-160oz
-10kg
-20lb
-400oz
Display 91 x 39 [mm] / 3.6 x 1.5 [inch] 5 digits LCD (9 digit LCD, PW-2N only)
Symbols STABLE, ZERO, TARE, g, kg, lb, oz, Low Battery
Keys ZERO, TARE, UNIT, POWER
Functions Weighing, Unit Conversion(Unit Ver.),
Dimensio
ns 239(W) x 227(D) x 66(H) [mm] / 9.4(W) x 8.9(D) x 2.6(H) [inch]
Platter
size 222(W) x 151(D) [mm] / 8.7(W) x 5.9(D) [inch]
Weight 1.5kg / 3.3lb
Power 1.5V x 6 units (AA size Battery) or 9VAdapter
Operation
Time Approx. 60hours (Manganese battery)/ 250hours (Alkaline at 20°C /68°F)
Operating
Temperat
ure -10°C ~ +40°C / 14°F ~ 104°F
Minimum
Voltage
Level of
The
Battery
About 5.5V

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Option 9VAdapter 300mA

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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).
UNIT Used to convert the unit of weight.
POWER To turn on or off.
1.5. Dimension
1.5.1. SW-1S/1C/1N

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1.5.2. SW-1W

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1.6. Sealing Method

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