Gamma Scale GMC-306 User manual

GMC-306/315/330 Digital Counting Scale
Operation Manual
Version 2.1
Gamma Scale
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Website: www.gammascale.com

CONTENTS
1. Parameters and Specification
2. Operation Keys and Functions
3. Operation Procedure
4. RS232C Output
5. Use Guide
6. Battery Maintenance(Option)
1. Parameters and Specification
1.1 Accuracy class: OIML III
1.2 Internal resolution ration: 500000
1.3 External resolution ration: 30000
1.4 Relative humidity: <= 90% RH (no condensation)
1.5 Display: 6 digit 0.56-inches LED
1.6 Power supply: AC adaptor of 9V 800mA, C+;
DC Option: 6V 1.2Ah rechargeable battery
1.7 RS232C Output Baud rate: 1200 (optional)
1.8 Platter size: 300 x 250(mm)
1.9 Operation temperature: -10°C ~ +40°C
1.10 Capacity: 6kg, 15kg, 30kg
1.11 Units: kg/lbs switchable
2. Operation Keys and Functions
2.1 ON / OFF Key
a. Used when switching on or off the power of PCB, see Item 3.1 for details;
b. Used when simple rectifying.
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2.2 COUNT SET
When the weight of the goods is not known, used to confirm the numbers of
sampling, see Item 3.6 for details.
2.3 TOTAL DISPLAY
Used for displaying the accumulated times and numbers, see 3.8.2 for details.
2.4 MEMORY CLEAR
Cooperating with other keys to clear accumulated times and numbers, see Item
3.8.3 for details.
2.5 UNIT WEIGHT SET
When the weight of the goods is known, used to confirm the input weight, see
Item 3.5 for details.
2.6 FIXED NUMBER CALL
a. When it needs the scale to warn at a set number, the key is used to set the
warning number, see Item 3.4.1 for details;
b. Cooperating with other keys to cancel the warning function, see Item 3.4.2 for
details.
2.7 SETUP CLEAR
Used to clear the input value that is not confirmed, see item 3.7 for details.
2.8 TARE
Used to deduct the weight on the platform as tare, see Item 3.3 for details.
2.9 ZERO
Make the scale return to zero in the allowed range.
3. Operation Procedure
3.1 Power on and off
3.1.1 Adjust its Support feet and make sure that life platform is level. It must be
used in non-vibration condition.
3.1.2 Insert adapter and turn on the power supply switch, the scale will execute
self-checking the strokes step by step. If zero position is normal, “0.000” will be
displayed.
3.2 Zero setting operating
When the weighing is under 2% full capacity, presses ZERO, all windows display 0.

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3.3 Tare
When the goods are placed on scale platform and it the weight is regarded as
tare to deduct. Press TARE, the window will display 0.
3.4 Fixed number call
3.4.1 If you need to set the fixed number call, the operating steps are as follows:
input the fixed number, then press FIXED NUMBER CALL key. If the count on the
platter is more than the set number, the scale will give our beep sound. If the unit
weight window displays ''ERR NO", it means the input value is wrong (for example,
if it has a decimal point).
3.4.2 To cancel the set fixed number call, the operating steps are as follows: Press 0,
and then press FIXED NUMBER CALL.
3.5 Counting for Known unit weight
If the unit Wright of goods is already known, directly input the unit weight value by
pressing digit keys and press UNIT WEIGHT SET to confirm it, at this time the
weigh value will be displayed in its unit weight window and you can count the
goods.
3.6 Counting for unknown unit weight
If the unit weight of the goods isn't known, you can sample first, the steps are as
follows:
3.6.1 Place certain amount of the goods on the platform, the weight value will be
displayed in its weight window.
Note: When sampling goods, you must fully pay attention to the weight of the
goods and unit error. You should generally sample more goods, thus the average
value limit obtained will be comparatively accurate.
3.6.2 Press the digit keys to input the count of sampling; the value will be displayed
in its unit weight window.
3.6.3 Press COUNT SET to set it, at this time, the unit weight counted is displayed
in its unit weight window and the sampled Count is displayed in its count window.
Now the operating for the Unit Wright input is finished. If file unit weight
window displays Error, it means the input value is wrong (For example, if it has a
decimal point).
3.6.4 Place the goods counted on the platform, at this moment the count of goods
will be displayed in its count window.
Note: In the way of sampling as 3.5 and 3.6, if the unit weight window displays
I0SPI, it means the unit weight is too light. Every sample weight should be more
than or equal to 0.2d.
3.7 Clearing of unconfirmed input digit (unit weight of sampling or count)

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There are two ways for clearing the input value:
3.7.1 You can directly press SETEUP CLEAR to clear the value you have just
input.
3.7.2 Input new value in five seconds after the last value is input and the original
setup will automatically be changed.
Note: After inputting the digits, you should press the corresponding key as
FIXED NUMBER CALL, UNIT WEIGHT SET, COUNT SET or SET UP CLEAR
to confirm, or all the key operation will not he effective.
3.8 Operation concerned accumulation
3.8.1 This counting scale has the latest preventing fraud function (i.e. the display
must return to zero after an accumulation and before going to next accumulation).
Under the situation that the unit weight is set or when the unit weight is sampled,
when 0 is displayed in the weight window, place the goods weighed on the
platform.
After awaiting the weight to be stable and the "STA" to be on or corresponding
unit cursor appears, press "+", the accumulative total count will be displayed in its
count window. When the count is more than 99999, FULL will be displayed. Three
seconds later, it will return to normal weighing state and the current accumulation is
not effective.
3.8.2 Accumulation display: Press TOTAL DISPLAY, the weight window displays
TOTAL will be displayed, and the unit weight window displays the accumulating
times and the accumulated count "XXXXX" will be displayed in its count window,
if press TOTAL DISPLAY again, it will return to normal weighing state.
3.8.3 Accumulation clearing (including times and value)
Under normal counting state, press TOTAL DISPLAY, and then press MEMORY
CLEAR. ADD will be off or
‘M+’ cursor disappears, at this moment the accumulated times and count will be
cleared.
Note: The accumulating value and times will be automatically cleared when it
is turned off.
4. RS-232C Output (optional)
4.1 RS-232C interface adopts the D-type 9-pin or 3-core metal plug.
4.2. Serial data (ASC II) is output by Mode I of MCS-51, the format is as the
following:
STX: State A / State B / State C / Display value / Tare value / Total number / Enter
STX: Start character, 02H
State A: Control character for decimal point (D7 refers to verification bit)
D7 D6 D5 D4 D3 D2 IA DO Decimal point position
0 1 0 1 0 1 0 Without decimal point

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0 1 0 I 0 1 I I -digit decimal 0.0
0 1 0 I I 0 0 2-digit decimal 0.00
0 1 0 1 1 0 1 3-digit decimal 0.000
0 1 0 1 1 1 0 4-digit decimal 0.0000
State B: Unit and weighing mode control character (D7 refers to verification bit)
D7 Verification bit
D6 0
D5 1
D4 1
D3 Dynamic mark bit D3--0, stability; D3=1, non-stability (dynamic)
D2 Overload mark bit D2--O, normality; D2=1, overload
D1 Positive and negative mark bit DIA, positive number: D1=1, negative number
DO, Gross weight and net weight mark bit DOA, gross weight; D0=1, net weight
State C: Blank space
5. Use Guide
5.1 Do not use under the environment of heavy dusty and high vibration.
5.2 Place the article in the center of the platter as far as possible.
5.3 Never use high corrosive solvents to clean it.
5.4 Do not weigh overload, weight (tare included) can't exceed its Max. Capacity
plus 9d ("d" is division value). If the weight exceeds this value, the indicator will
display as "FULL", and may possibly give out beep sound.
5.5 Do not place article on platter for a long period of time and never bump platter
in a sudden, otherwise, the load cell may be damaged.
5.6 Be sure that charging rechargeable battery in time if your scale has one.
5.7 Don't disassemble it without authorization.
5.8 If the display doesn't change during operation, turn off the switch of battery and
pull out the adaptor plug, then turn on the scale again.
5.9 If something is wrong, immediately turn off the switch of battery (or storage
battery) and pull out the adaptor plug. Non-professional staff can't fix it without
authorization. Contact our sales agent in local area.
5.10 To recalibrate the scale, do it after warmed up for 30minutes.
6. Battery Maintenance
If using the rechargeable battery, please recharge it more often. Otherwise work
with attached adaptor.
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