Yamato AW-300P User manual

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Digital Portion Scale
AW-300P
SERVICE MANUAL
PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS BEFORE
STARTING TO USE THE SCALES

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TABLE OF CONTENTS
TABLE OF CONTENTS................................................................... 1
SPECIFICATIONS........................................................................... 2
OVERLAY........................................................................................ 2
KET FUNCTIONS............................................................................ 3
USING SCALE................................................................................. 4
USING TARE FUNCTION................................................................ 4
USING HOLD FUNCTION............................................................... 5
SETTING MODE ............................................................................. 6
SETTING FUNCTION DESCRIPTION............................................ 6
CALIBRATION PROCEDURE ........................................................ 7
CONTROL PANEL........................................................................... 8
LCD FORMAT................................................................................. 9
PART LIST & ASSEMBLY DRAWING........................................... 10
TROUBLE SHOOTING ................................................................. 12
INSTRUCTION FOR CHARGEAND CONNECT.......................... 13
INSTRUCTIONS FOR REPLACING BATTERIES ........................ 14
Parameters of RS232 interface ........................................................ 15
Connecting with PC ........................................................................ 16
ERROR MESSAGE........................................................................ 17

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SPECIFICATIONS
Model AW-300P
Capacity 300 kg x 0.1 kg / 660 lb x 0.2 lb
Weight Unit kg / lb
LCD Readout 1.0” LCD display with 5 1/2 digits
Dimensions Assembled size: 210×110×45 mm
Platform size: 550×550x65 mm
Buttons ON/OFF, UNIT, HOLD, TARE
Power
Supply
 6-AA size batteries
 15V DC adapter 100~ 300mA
Operation
Temperature 5℃/ 35℃
OVERLAY

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KET FUNCTIONS
Key Description
Turn ON/OFF the scale
To hold weighing result on the display / determine stable
weighing value
To select the weighing unit. (kg/lb)
Tare weight during weighing process.
The ‘Hold’ weighing function is active.
Stored ‘Tare’value.
Stable symbol
Minor weight value
Indicates scale is at center of zero
Low battery indication

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USING SCALE
WEIGHING
Switch on the scale using key. The diagnostic scale self-check is
performed and the software version is displayed.
The scale is ready for weighing when the “ 0.0 kg ” displays on the
screen.
Person stands on the middle of the scale for weighing. Wait until the
scale stabilizes and stable sign (ο) shows on the screen
Direction:
If a weight is over the scale capacity, the display will show the „Err”
message (= overload).
USING TARE FUNCTION
Tare allows the user to zero the instrument to cancel the weight of a
container/ clothes from the reading of the instrument, thus giving the true
weight of the animal being tested.
Place the object need to be tare on the tread platform.
Press TARE key after the weight stabilizes and stable sign displays.
Move the animal need to be weighed on the scale platform(without
removing the tare object)
To delete the saved tare value, remove the tare object from the tread
platform and press [TARE] key.

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USING HOLD FUNCTION
AW-300P is provided with the integrated hold function (determination of
average value). It’s weighing accurately although they are not still on the
scale plate. Once the HOLD key is pressed, the weight reading will remain
on the display, so the reading can easily be read.
Switch ‘ON’ the scale using [ON/OFF] key. The diagnostic
self-checks is performed. The scale is ready for weighing when the
„0.0 kg” displays on the screen.
Place weight on the center of the scale plate.
Press the [HOLD] key. When the triangle is flashing on the display,
the scale records the fluctuating weight values and then calculates
average weight and displays the result on the screen.
Move the weight from the scale platform, the weight reading will
remain on the display.
Press the [HOLD] key again to return the scale to the normal
weighing mode.

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SETTING MODE
With the weighing scale switched on, long press TARE 3seconds, to enter
into the setting mode. The display will shows SETUP and then followed
by UNIT appears.
A selection is made by pressing the TARE key means: →,
and the HOLD key means:↓
SETTING FUNCTION DESCRIPTION
: Unit (kg/lb/oz)
: Auto off time (120s/180s/240s/300s/off)
: Hold range (2d/5d/10d/15d)
: Touchless Tare Function (on/off)

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CALIBRATION PROCEDURE
In weighing mode press the UNIT key and keep it pressed until “CAL”
followed by the weight value of the required adjustment weight in
displayed. “LOAD” is displayed alternatively.
Carefully place the required adjustment weight in the centre of the
weighing plate press TARE key, adjustment is started.
Wait until the stability display appears, after that the adjustment is finished.
The balance will automatically return to weighing mode upon successful
completion of the adjustment and will display the weight of the adjustment
weight.
Take away adjustment weight.

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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.

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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.

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PART LIST & ASSEMBLY DRAWING
Indicator part list

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Deck part list

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TROUBLE SHOOTING

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CAUTION:
Always connect the AC adaptor with the indicator before connecting
to the mains power supply.
Please disconnect the adaptor from main power supply before taking
out the AC adaptor pin from indicator.
INSTRUCTION FOR CHARGE AND CONNECT
If prompt displays on the LCD, please charge the
scale with AW-300P exclusive adaptor or replace the batteries.
Locate adaptor plug-in at the back side of indicator.

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INSTRUCTIONS FOR REPLACING BATTERIES

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Parameters of RS232 interface
Set parameters of the scale interface on the connected device. It is not
possible to change the scale parameters.
Baud rate: 9600 bps
Parity check: None
Data length: 8 bits
Stop bit: 1 bit
Handshake: RTS/CTS
Data code: ASCII
PS2 Pin out

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Connecting with PC
1. Start Hyper Terminal
Start Hyper Terminal program from clicking
Start Menu →Programs →Accessories →Communication →Hyper
Terminal.
2. New Connection Description
Give new connection a name then click OK.
3. Select Your COM Port
Click Connect to select your COM port. Usually there’s only one option
for select. Then click OK.
4. Port Settings
Click Bits per second to set up rate at 9600, Data bits at 8, Parity at None,
Stop bits at 1 and Flow control at Hardware. Then click OK to complete
your setting.
5. Output Data
The weighing result will transfer to PC

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ERROR MESSAGE