UWE SAC Series Operation Manual

SAC SERIES

TRIPLE-INTERVAL HIGH PRECISION

COUNTING SCALE

OPERATION MANUAL

PLEASE READ THIS MANUAL VERY CAREFULLY BEFORE ATTEMPT

TO OPERATE THE SCALE

December 2001

Specifications subject to change without prior notice

CONTENTS

1. INSTALLATION

2. SPECIFICATIONS

3. KEYBOARDS, PANEL LAYOUT AND DESCRIPTION

4. SCALE SETUP

5. INSTRUCTION FOR USE

6. TROUBLESHOOTING

7. ERROR CODES AND DESCRIPTIONS

8. DAILY CARE AND MAINTENANCE

1. INSTALLATION

CAUTION:

a. This is a precision measuring device, handle with

extreme care.

b. Allow 2 minutes for warm up before operating.

1.1 CHECK and make sure that the following accessories

are included:

a. This operation manual
b. Scale x 1
c. Platter x 1
d. Power adaptor x 1

Contact your dealer if any items are missing.

1.2 INSERT the platter onto the scale carefully. No
excessive force is required.

1.3 POWER THE SCALE ON
a. Before plugging the power adaptor into an electricity

outlet, check and make sure that the input voltage
of power adaptor matches with the output voltage of
the outlet. If not, do not plug in and contact your
dealer immediately.

b. Before first time use, plug the main adaptor into

the power outlet and charge the scale for at least
8 hours.

1.4 RETAIN the packing materials for future
transportation purposes.

CAUTION:

In some countries, this unit is required by law to be
sealed (or stamped) and bearing a serial number. Do not
break or remove the seal (or stamp) or serial affixed
to this scale. Such actions may offense the law and void
the warranty. Contact your dealer for more information
or after sales service.

For most accurate result, do not use this scale when
environment conditions fall beyond those listed in
SPECIFICATIONS.

Do not attempt to open this unit or any trouble shootings
except those listed in TROUBLESHOOTING.

2. SPECIFICATIONS

2.1 GENERAL SPECIFICATIONS

Model No. Max1/e1 Max2/e2 Max3/e3

SAC-7.5C

1500g/0.1g 3000g/0.2g 7500g/0.5g

SAC-15C

3000g/0.2g 7500g/0.5g 15000g/1g

SAC-30C

7500g/0.5g 15000g/1g 30000g/2g

SAC-60C

15000g/1g 30000g/2g 60000g/5g

Platter
Size

230 x 345mm All Stainless Steel

Power
Source

Built-in Rechargeable or Power Adaptor

Operation
Environment

0o~40oC(32o~104oF), Non-condensed
R.H.=85%

Specifications subject to change without notice

2.2 MINIMUM PIECES, WEIGHT APPLIED & SAMPLE
SIZE WEIGHT SPECIFICATIONS

Recommended Minimum

Model No.

Piece Weight

Weight

Applied

Sample Size

Weight

SAC-7.5C 0.05g 2g 2g

SAC-15C 0.1g 4g 4g

SAC-30C 0.25g 10g 10g

SAC-60C 0.5g 20g 20g

3. KEYBOARDS & PANEL LAYOUT AND
DESCRIPTION

KEYS DESCRIPTION

1. ON/ZERO KEY

Press this key to turn scale on or set weight to zero.
Refer to SPECIFICATIONS for maximum zero range.

2. TARE KEY

Press this key to tare off the weight of a container.
Refer to SPECIFICATIONS for maximum tare range.

3. NUMERIC AND DECIMAL KEYS

Press these keys to attain the desired numeric value.

4. OFF KEY

Press this key to turn scale off.

5. CLEAR KEY

Press this key to clear the numeric figure entered

6. UNIT PIECE WEIGHT SET KEY

Press this key to enter a unit piece weight.

7. NUMBER SET KEY

Press this key to enter the number of pieces on platter.

8. CHECK KEY

Press this key to set upper weight and quantity check
limit.

9. M+ KEY

Press this key to add current total count to memory.
Note: When the WEIGHT PANEL shows a negative value, the
total count will still give a positive count value. The
quantity is still added to memory when M+ key is pressed.

10. MR KEY

Press this key to recall accumulated results.

11. PLU KEYS

Press this key to set/recall a unit piece w eight to/from
a PLU.

INDICATORS DESCRIPTION

12. ZERO INDICATOR

When a zero weight is detected, an arrow will appear
and point at this indicator.

13. NET WEIGHT INDICATOR

When the tare function is in operation, an arrow will
appear and point at this indicator. The weight being
displayed on the WEIGHT PANEL is a net weight.

14. LO-BAT INDICATOR

This indicator turns on when the battery inside scale
is low. Recharge the scale immediately. Failure to do
so may cause unrecoverable damage to the battery.

15. LOW UNIT WEIGHT INDICATOR

An arrow will appear and point at this indicator when
the unit piece weight applied/detected is less than the

recommended minimum piece weight as listed on 2.2.

16. LOW SAMPLE SIZE INDICATOR

An arrow will appear and point at this indicator when
the sample size applied/detected is less than the
recommended minimum sample size as listed on 2.2.

17. M+ INDICATOR

This indicator will appear when memory contains of
transaction data.

18. CHARGING INDICATOR

This indicator shows battery recharge status.
Red color: Battery is being charged
Green color: Recharge completed

PANELS DESCRIPTION

19. WEIGHT PANEL
The current weight detected is shown here.

20. UNIT WEIGHT PANEL
The current unit piece weight entered is shown here.

21. TOTAL COUNT PANEL

Total count of the current transactions is shown here.

4. SCALE SETUP

4.1 PLACE THE SCALE

Place this unit on a hard and strong surface, where
is free from RF interference, vibration, fire, airflow,
direct sunlight and excessive moisture.

For most accurate weighing result, always place this
unit on a level surface. If necessary, adjust the
adjustable feet underneath the scale to obtain a level
condition.

4.2 TURN SCALE ON AND OFF

Press ON/ZERO to turn scale on or press OFF to turn scale
off.

4.3 BACKLIGHT SETTINGS

4.3.1 Turn backlight on: - Power Saving Mode

a. Turn scale on
b. Press and hold 1
c. Backlight is turned on
NOTE: Under this Power Saving Mode, backlight will
automatically turn off after weight displayed is
unchanged for about 20 seconds or when a zero weight
remains unchanged for about 10 seconds.
Backlight will be turned on again by pressing any key
or when a new weight is detected.

4.3.2 Turn backlight on: - Without Power Saving Mode

a. Turn scale on
b. Press and hold 2

c. Backlight is turned on
NOTE: Backlight under this mode will remain lit on until
manually turned off.

4.3.3 Turn backlight off
Press and hold 0 until backlight is turned off

4.4. INTERNAL FUNCTIONS SETTINGS

4 internal functions1 are available. They are:

F1 Check offset value
F2 Check display segments

F3 Check span value
F4 Set auto power off

4.4.1 How to Enter the Functions Required

a. Turn scale on by pressing ON/ZERO, then press and

hold NUMBER SET before scale completes counting down

b. The WEIGHT PANEL shows F1
c. Press NUMBER SET until the desired function number

appears

d. Press @WT/SET to enter selection
e. Press M+ to save and quit to normal operation status

4.4.2 Check Display Segments (F2)

1

F1 and F4 are for qualified service personnel only. May be disable as requested by

metrological legislation of certain countries.

a. Refer to the 4.4.1 on how to enter F2
b. Press @WT/SET
c. All display segments will be lighted up
d. Check digits and arrow indications of all 3 panels

to verify any defects or errors

e. Press CLEAR to quit

4.4.3 Set Auto Power Off Status (F4)

This unit is equipped with AUTO POWER OFF function.
Default setting = auto off after 4 minutes unused. Follow
the below steps to disable/employ the AUTO POWER OFF
function.

a. Refer to the 4.4.1 on how to enter F4
b. Press @WT/SET to shift between 0_OFF and 4_OFF
*To disable the AUTO POWER OFF function select “ 0-OFF”
*To employ the AUTO POWER OFF function select “4-OFF”
c. Press @NUMBER SET to confirm and return to other

function selection manual, or

d. Press M+ to save and quit

5. INSTRUCTIONS FOR USE

Before using, allow 2 minutes for warm up.

5.1 ZERO THE WEIGHT DISPLAYED WHEN UNLOADED

If ZERO INDICATOR does not appear when the unit is not
loaded, press ON/ZERO to set weight displayed to zero.
Refer to SPECIFICATIONS for maximum zero range.

5.2 TARE FUNCTION

5.2.1 Actual Tare Method

a. Place a container onto the platter
b. Press TARE to tare off the weight of this container
c. After TARE is pressed, zero weight will be displayed

and the NET WEIGHT INDICATOR appears.

5.2.2 Pre Tare Method

a. Enter the pre-tare weight value through numeric keys
b. Press TARE
c. After TARE is pressed, a minus pre -tare weight will

be displayed and the NET WEIGHT INDICATOR appears

5.2.3 Clear Weight of a Container from Memory

a. Remove all loads from platter
b. Press TARE
c. NET WEIGHT INDICATOR disappears and weight value

resides in memory is now erased

5.3 PLACE A LOAD

Always place a load onto the platter gently.
Shock/excessive force may cause irrecoverable damage
to the weight sensor inside. It is a good practice to
remove all loads from platter immediately after weighed.
This would prolong the lifetime of the weight sensor.

5.4 WEIGHING APPLICATIONS

Before weighing, make sure that the ZERO INDICATOR is
on. Should a container is used, refer 5.2 for how to
tare off the weight of the container.

Place an object on platter and the weight of it is
displayed on WEIGHT PANEL.

For best weighing result, refer to SPECIFICATIONS for
recommended minimum weight to be applied.

5.5 UNIT PIECE WEIGHT2: - THE FOUNDATION OF

COUNTING

Unit piece weight can be entered or obtained by either
of the following methods:
a. By Direct entry method when the unit piece weight

is known, or

2

For best counting result, refer to 2.2 MINIMUM PIECES, WEIGHT APPLIED

& SAMPLE SIZE WEIGHT SPECIFICATIONS for recommended minimum piece

weight and sample size.

b. By Sampling method when the unit piece weight is not

known

5.5.a Procedures of Direct Entry Method3

a. Refer to 5.1 and 5.2 for zero and tare
b. Enter the unit piece weight and confirm by pressing

@WT/SET. The unit piece weight is now displayed on
the UNIT WEIGHT PANEL

NOTE: Under this method, the AUTO PIECE WEIGHT
ENHANCEMENT FUNCTION will be disabled for same

subsequent counting.

5.5.b Procedures of Sampling Method

a. Refer to 5.1 and 5.2 for zero and tare
b. Place a sample with known quantity on platter
c. Enter the quantity of the sample through the numeric

keypad and confirm by pressing NUMBER SET

d. The scale will automatically determine the unit

piece weight. The unit piece weight will then be
displayed on the UNIT WEIGHT PANEL

e. Sampling process is now completed

3

When the individual unit piece weight is not standardized, it is

strongly r ecommended that unit piece weight should be obtained through
Sample method as described in 5.5.b.

5.6 AUTO PIECE WEIGHT ENHANCEMENT FUNCTION

In order to obtain the best counting result and to avoid
and minimize sampling error, this scale is equipped with
AUTO UNIT PIECE WEIGHT ENHANCEMENT FUNCTION.

This function will automatically be employed when the
unit piece weight is obtained through the sampling method
as described in 5.5.b.

5.6.1 How AUTO UNIT PIECE WEIGHT ENHANCEMENT FUNCTION

Works

After a unit piece weight is obtained by methods as
described in 5.5.b, then place more loads onto the platter.
The n ew quantity will be shown on the TOTAL COUNT PANEL.

The AUTO UNIT PIECE WEIGHT ENHANCEMENT FUNCTION will
update the unit piece weight if both requirements of
below are met:
a. The quantity added to platter is more than 4 pieces,

and

b. The quantity added to platter is less than 100% of

previous maximum counts previously attained from
the same transaction.

If the above requirements are met, a new unit piece weight
will be displayed on the UNIT WEIGHT PANEL and confirmed
by an audio "beep".

AUTO UNIT PIECE WEIGHT ENHANCEMENT FUNCTION will be
terminated when a zero weight is detected during the

transaction process.

5.7. WARNING INDICATORS

5.7.1 LOW UNIT WEIGHT INDICATOR

This indicator appears when the unit piece weight is
less than the recommended minimum piece w eight as listed
on 2.2.

This means that the unit piece weight is too light to
generate accurate counting results. Use another
counting scale with a lower e1 value as listed on 2.1

GENERAL SPECIFICATIONS.

Should a counting scale with better resolution is not
available. Counting operations may proceed but greater
tolerance on counting results has to be allowed.

5.7.2 LOW SAMPLE SIZE INDICATOR

This indicator appears when the sample weight applied
is less than the recommended minimum sample size weight
as listed on 2.2.

This means that the sample size is not sufficient to
generate accurate counting results. Increase the number

of the sample size until this indicator turns off.

Should increasing the sample size is not possible.
Counting operations may proceed but greater tolerance
on counting results has to be allowed.

5.8 COUNTING APPLICATION

a. Refer to 5.1 and 5.2 for zero and tare
b. Obtain unit piece weight through either methods as

listed on 5.5

c. Step by step add more load onto the platter (or remove

part of the load from the platter)

d. The latest weight, unit piece weight and total

quantity would be displayed on the corresponding
panel

5.9 MEMORY FUNCTIONS

5.9.1 Accumulated Counting Transaction

a. Obtain a transaction result through 5.8
b. Press M+ to save weight and total count to memory
c. Scale displays "tOt.01" on the UNIT WEIGHT PANEL,

01 denotes as the first memory entered. The weight
and total count of current transaction are saved
to memory

d. The M+ INDICATOR appears to indicate that memory

is now containing data

e. Repeat above steps for subsequent counting

transactions

NOTE 1 : If no unit piece weight is applied, only weight
data will be saved to memory.

5.9.2 Adding Quantity to Memory Manually

Follow the below procedures to add quantity to memory

a. Remove all loads from platter
b. Make sure that the ZERO INDICATOR appear and the NET

INDICATOR disappears

c. Enter the desired quantity to be added to memory

through numeric keys

d. Press M+
e. Quantity is now added to memory

5.9.3 Recall Accumulated Data from Memory

a. Press MR
b. Scale displays " tOt.#" on the WEIGHT PANEL. # Denotes

the total number of entries saved to memory. Then,
the total accumulated weight and total count are
displayed on the WEIGHT and TOTAL COUNT PANEL
respectively

c. The scale will return to normal operation 2 seconds

after the accumulated data is displayed

NOTE: Data stored will be erased when the scale is turned
off.

5.9.4 To Clear Accumulated Data from Memory

a. Press MR
b. Total accumulated data will be displayed on 3 display

panels

c. Press CLEAR
d. All data is cleared now
e. The scale will return to normal operation

5.10 CHECK FUNCTIONS

This unit is equipped with check functions. When quantity
or weight reaches or excesses the preset value, a
continuous audio beep and flashing display will be
activated.

5.10.1 Set Quantity Check Limit

a. Press CHECK
b. Scale displays CH.__ on UNIT WEIGHT PANEL
c. Enter preset quantity value through numeric keys
d. Value entered is shown on the UNIT WEIGHT PANEL
e. Press NUMBER SET to confirm
f. Scales displays CH._PSC on the UNIT WEIGHT PANEL

while the value entered on the TOTAL COUNT PANEL

g. Scale return to normal operation within 2 seconds

5.10.2 Set Weight Check Limit

a. Press CHECK
b. Scale displays CH.__ on UNIT WEIGHT PANEL

c. Enter preset weight value through numeric keys
d. Value entered is shown on the UNIT WEIGHT PANEL
e. Press @WT/SET to confirm
f. Scales displays CH._Wt on the UNIT WEIGHT PANEL while

the value entered on the WEIGHT PANEL

g. Scale return to normal operation within 2 seconds

5.10.3 Clear Quantity Check Limit

a. Press CHECK
b. Press 0
c. Press NUMBER SET
d. Wait until the scale return to normal operation
e. The upper weight limit is now erased from memory

5.10.4 Clear Weight Check Limit

a. Press CHECK
b. Press 0
c. Press @WT/SET
d. Wait until the scale return to normal operation
e. The upper count limit is now erased from memory

5.11 UNIT PIECE WEIGHT MEMORY (PLU)

5.11.1 Saving a Unit Piece Weight to PLU

This scale is equipped with 8 unit piece weight PLU
memories. Save a unit piece weight to PLU by either one
of the following methods:

a. By Direct entry method, or
b. By Current unit piece weight method

5.11.a Direct Entry Method

a. Key in the unit piece weight through keypad. Make

sure the unit piece weight does not exceed 6 figures
disregard the decimal place

b. Press and hole the preferred PLU location for about

2 seconds until Pr._SET appears

c. Data is now stored

5.11.b Current Unit Piece Weight Method

a. Obtain a unit piece weight through procedures listed

on 5.5.b

b. Press and hole the preferred PLU location for about

2 seconds until Pr._SET appears

c. Data is now stored
NOTE: Data stored in PLU will not be erased when scale

is powered off.

5.11.2 Recall Unit Piece Weight from Memory

To recall unit piece weight stored in memory, simply
press the corresponding PLU.
After the PLU is pressed, the unit piece weight will
be displayed on the UNIT WEIGHT PANEL.

5.11.3 Clear Unit Piece Weight PLU
a. Press 0

b. Press and hold the preferred PLU location to clear
c. Wait until the scale displays PRE._SET on UNIT WEIGHT

PANEL

d. Release PLU
e. Memory is cleared and scale returns to normal

operation

5.12 COMPUTER DATA RS232C OUTPUT (OPTIONAL)

5.12.1 Connect the Scale with a Computer

Follow the below steps to connect the scale with a
computer.

a. Turn scale off
b. Turn computer off
c. Connect the RS232C output of scale to computer with

an appropriate data cable

d. Turn scale on
e. Turn computer on
f. Load and run the BASICA program file (For DOS

platform)

5.12.2 Default Output Settings

• BAUD RATE = 9600

• DATA BITS = 8

• PARITY = NONE

• STOP BITS = 1

5.12.3 When Using DOS System

a. Create BASICA computer program file as below to

enable the computer to receive data sent by scale.

10 OPEN "COM*:9600, N,8,1,CS,DS,CD" AS#1

*: Input 1 if the input port of computer is
COM 1, or input 2 for COM 2 ...etc.

20 LINE INPUT #1, A$
30 PRINT A$
40 GOTO 20
50 END

b. Save the above program file.

5.13 PRINTER OUTPUT (OPTION)

By pressing the M+ and by erasing the accumulated data
(by pressing MR followed by CLEAR), the follow data will
be transmitted to printer.

S/N WT @WT PSC (NOTE 1)

01. 78 1.0000 78

02. 580 2.0000 290 (NOTE 2)

03. +++ 100 (NOTE 3)

03/ 658 468 (NOTE 4)

NOTE 1:
S/N = Serial Number, WT = Weight, @WT= Unit Piece Weight,

PSC = Total quantity. An underlined heading will be
transmitted if M+ is pressed for the first time.

NOTE 2:
By pressing M+ again, the data of 2nd transaction is
transmitted.

NOTE 3:
+++ means the count number is added to memory by manual

entry.

NOTE 4:
When the total accumulated transaction is erased (by
pressing MR followed by CLEAR), the total number of
transaction, total accumulated weight and count number
are transmitted.

A consecutive dot line sent before the accumulated result
denotes the total accumulated value.

5.14 RECHARGE THE SCALE

When the LO-BAT INDICATOR appears, recharge the scale
immediately. Fail to do so will damage the rechargeable
battery inside. Recharging is possible during operation.
The charge status is indicated by the In-Charge INDICATOR
as below:

RED: Battery is charging.
GREEN: Battery charge completed.

6. TROUBLESHOOTING

SyndromeScale cannot be turned on
Check: Is the scale charged?
Action: Recharge the scale for at least 8 hours

before use for the first time or plug in
the power adaptor before power on the scale.

Check Is the power adaptor plug in properly into

both the electricity outlet and the DC inlet
of scale?

Action: Secure both ends of the power adaptor and

try again.

Syndrome Scale turned off automatically
Check Is the AUTO POWER OFF function enabled?
Action Refer to 4.4.3 to disable the AUTO POWER

OFF function.
Check Is the LO-BAT INDICATOR on?
Action Apply the power adaptor.

Syndrome Rated capacity cannot be reached
Check Is the TARE INDICATOR on?
Action: Turn the scale off. Remove all loads from

platter and turn on again.

Check Is there anything obstructing the platter?
Action Remove all obstacles.

Syndrome When turning on scale, all display PANEL

blank out but only the ZERO and TARE
INDICATOR appear

Check Is any load applied to platter when turning

scale on?

Action: Turn scale off. Remove all loads from

platter and turn scale on again.

Check Is the platter inserted properly?
Action: Turn scale off. Insert platter properly and

turn scale on again.

Syndrome WEIGHT and TOTAL COUNT PANEL blank out

during operation

Check Does the load applied to platter exceed the

rated capacity of scale?

Action Remove all loads from platter and try to

put less loads.

Syndrome Weighing result is not accurate
Check Is the scale placed in a level condition?
Action Adjust the adjustable feet to a level

condition.

Check Is the scale affected by airflow, vibration

or RFI?

Action: Place the scale away from all

interferences.

Check Is the scale calibrated correctly?
Action Contact your dealer.

7. ERROR CODES AND DESCRIPTIONS

Err_1: Accumulation error.

M+ cannot be activated when weight applied is

zero or while the same transaction has already
been accumulated.

Err_2: EEPROM parameter error.

Contact dealer for service.

Err_3: Offset value too low.

Contact dealer for service.

Err_4: Offset value too high.

Removed all loads from platter and restart again.
Should same error code appear again, contact
dealer for service.

Err_5: The calibrated weight applied is out of range.

Contact dealer for service.

8. DAILY CARE AND MAINTENANCE

a. Precision measuring device, handle with extreme

care.

b. Clean the scale with a soft and damp cloth. If

necessary, apply a mild detergent.

c. Do not use any harsh, abrasive material, acetone,

volatile solvent, thinner or alcohol for cleaning.

d. Verify the accuracy of scale periodically.

NOTE: In s ome countries, calibration is restricted
to be done by an authorized/qualified agent only.
Contact your dealer for more information.

e. It is a good practice to apply the dust cover when

operating the scale.

f. The scale must be placed horizontally during

transportation or long time storage.

g. Remove platter from scale before transportation or

long time storage.

h. Store scale in a dry and clean place.