Yamato AW-WLG Series User manual

0
Digital Portion Scale
AW-WLG Series
SERVICE MANUAL
PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS BEFORE
STARTING TO USE THE SCALES

1
TABLE OF CONTENTS
SPECIFICATIONS ...................................................................................2
OVERLAY ...............................................................................................3
LCD DISPLAY.........................................................................................3
KEY FUNCTION DESCRIPTION:..........................................................4
USING AUTO TIME-OFF SETTING.......................................................5
CALIBRATION PROCEDURE................................................................6
INSTRUCTION AUTO SHUT-OFF FUNCTION.....................................7
POWER SUPPLY.....................................................................................8
INSTALLING THE BATTERY ................................................................8
CONTROL PANEL ..................................................................................9
LCD FORMAT .......................................................................................10
PART LISTS &ASSEMBLY DRAWING...............................................11
TROUBLE SHOOTING.........................................................................12
ERROR MESSAGE................................................................................13

2
SPECIFICATIONS
MODEL# AW-WLG15 AW-WLG30
Capacity
Division
0-6 kg x 0.002 kg
5-15 kg x 0.005 kg
0-15 kg x 0.005 kg
15-30 kg x 0.01 kg
Units of Measure kg, lb
Function keys ON/OFF, HOLD, UNIT,
TARE/BACKLIGHT
Stabilisation Time 1-2 seconds
Operating Temp. and
humidity
5°C - 35°C
40%-95% RH
Transport and storage
temperature and humidity
-20°C +60°C
25%-95% RH
Power supply 4 x AA size Alkaline cells
120 VAC 60Hz to15 VDC 300 mA wall
plug-in UL/CSA listed power supply
Indicator display 1.0 inch backlit LCD, 5 Digit with fraction
Dimensions 11.22" W x 10.03" D x 3.54" H
(285mm x 255mm x 90mm)
Platform Size 9.44" W x 7.28" D
(240mm x 185mm)

3
OVERLAY
LCD DISPLAY
1. : Stable symbol
2. : Minor weight value
3. : Indicates scale is at center of zero
4. : Low battery indication

4
KEY FUNCTION DESCRIPTION:
1. ON/OFF:
1. Turn on the scale by pressing the ON/OFF key.
2. The display will count down from 88888 and will automatically
display zero (weighing mode).
3. Place the item in the middle of the scale. Wait until the scale
stabilizes and stable enunciator illuminates on the display.
2. UNIT:
Press the UNIT key to switch from one weighing unit to another.
For example from kg to lb, oz, lb/oz, lb/oz 1/8.
3. HOLD
a. Press once to hold the displayed weight.
b. Press again to return display to normal weighing mode.
4. TARE:
a. Press to reset the display to zero up to 100% of the scale
capacity.
b. Press to confirm the setting for each menu.
c. Setting backlight function ON or OFF.
5. UNIT:
a. Press to change the weighing units to the alternate units of
measurement (if selected during configuration of the scale).
b. Press 6 times while holding ON/OFF key to enter Configuration
mode.
c. Press to select menu in the Configuration mode.

5
USING AUTO TIME-OFF SETTING
Switch ON the scale and long press UNIT key for 3 seconds, first
“SETUP” and then “A.OFF” will display successively.
AUTO-OFF TIME SETUP
This enables operator to select the auto turn OFF time of the device.
Auto off time: 120 sec/180 sec/240 sec/300 sec/off
BUZZER ON/OFF SETUP
This enables operator to select beep sound ON/OFF.
Buzzer: On/Off
Note: To confirm the settings, please press TARE when
displays on the display.
UNIT: select
TARE: confirm
UNIT (3secs)
*software version

6
CALIBRATION PROCEDURE
Operation Display
1. Place the scale on a hard, level surface.
2. Don’t press ON/OFF key,
3. Press and hold ON/OFF, and then press
UNIT key three times. To enter into
calibration procedure.
4. Display will show the zero value.
5. Then press the key.
6. Place the calibration weight (10kg)
carefully in the centre of the scale plate,
and the display will show SPAN Count
value (4000-80000).
7. Press the key. The adjustment
process is started.
8. When the adjustment is finished
successfully, the scale is automatically
switched over to the weighing mode
again and the calibration weight value
will be displayed.
9. Remove the calibration weight.
Re-power on, the instrument is in normal
mode.

7
INSTRUCTION AUTO SHUT-OFF FUNCTION
Define
Select
Press UNIT
key 3 sec

8
POWER SUPPLY
To apply power to the scale
using the supplied 15VDC, 300
mA power supply, insert the
plug from the power supply
cable into the power jack on the
back of the scale and then plug power supply into the proper electrical
outlet. The scale is now ready for operation.
INSTALLING THE BATTERY
The scale can use four (4) AAsize batteries (not included). If you wish
to operate the scale from batteries, you must first obtain and install the
batteries. Access is via a removable cover on the bottom of the scale.
Battery Installation/Replacement
1. Turn scale over so that display is facing down and place it upside down
on a flat level surface, such as a table or bench.
2. Locate battery cover on bottom of scale and turn locking tabs
counterclockwise.
3. Remove battery cover (lift straight up and slide it out) exposing battery
holder.
4. If installing new batteries, proceed to step 5. If replacing batteries,
–
+
–
+
Cov
er

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remove all 4 batteries from battery holder and then proceed to step 5.
5. Install 4 new "AA" size batteries in battery holder, noting polarity
markings as shown above.
6. After placing all 4 batteries in holder, replace battery cover on scale.
Slide tabs on battery cover into slots at back of opening, press down on
cover and turn locking tabs clockwise.
7. Turn scale over (display facing up) and press ON/OFF key.
If display turns on, batteries have been installed correctly.
If not, remove battery cover and check for one or more
improperly positioned batteries.
CONTROL PANEL
When control panel switch damaged. Using multi-meter to measure
voltage of control panel. Reconnect control panel. Make sure that
control panel is connected to the correct housing.
If problem persists, replace a new control panel.

10
LCD FORMAT
When power on, the scale shows non-complete segments. Please check
the LCD pin (please refer to above LCD format). Check whether LCD
pins are soldered properly or not.

11
PART LISTS & ASSEMBLY DRAWING

12
TROUBLE SHOOTING

13
ERROR MESSAGE
ERROR
MESSAGE
REASON ACTION
Low battery:
This warning shows that
the voltage of batteries is
too low to use.
Please replace with new
batteries or plug the AC
adaptor for operation.
Overload:
The total load exceeds the
maximum capacity of the
scale.
Please reduce the loading
and try again.
Counting error (too high):
Indicates that the signal
from the load cells is too
high.
This error is normally
caused by a serious fault on
the scales i.e. a faulty load
cell or wiring. Please
contact the local Service
Representative.
Counting error (too low):
Indicates that the signal
from the load cells is too
low.
This error is normally
caused by a serious fault on
the scales such as a faulty
load cell or wiring. Please
contact the local Service
Representative.