Table of Contents
I
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
II
Keyboard Functions
. . . . . . . . . . . . . . . . . . . . . . . . . . .3
III
Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
1. Weighing Mode
2. Counting Mode
3. Percent Mode
IV Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
V
Alarm Indication/Error Message
. . . . . . . . . . . . . . .6
VI RS232 Transmission (Optional)
. . . . . . . . . . . . . .6-7
VII Counting Function Attention
. . . . . . . . . . . . . . . . . 7
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3.
RS232 Interface:
• Frame Format: Scale has a standard RS232 UART signal. Each data frame
has 10 bits. The detail information of frame is as follows:
a. Bit 1: Start bit
b. Bit 2-Bit 9: Data bit
c. Bit 10: Stop bit
• Data Format: Every message includes 6 bytes;
a. No. 1: D0-D7 = 0FFH (Message Flag)
b. No. 2: D0-D2 = Decimal point (0-5)
D3-D4 = Current mode: 00-Weight; 01-Count; 10-Percent
D5 = 1 means weight is negative, otherwise positive
D6 = 1 means weight is stable, otherwise unstable
D7 = 1 means weight is overflow, otherwise normal
c. No. 3: D0-D7 = BCD1 (LSB)
d. No. 4: D0-D7 = BCD2 (MSB)
e. No. 5: D0-D7 = BCD3 (HSB)
f. No. 6: D0-D7 = Unit for weight: 1 – Lb; 0 - kg
VII. COUNTING FUNCTION ATTENTION
Counting accuracy of counting and weighing scale depends on the precision of
sampling. Here are a few points to consider when choosing a counting and
weighing scale that’s right for you.
1. Choose the precision of the scale according to the unit weight of goods.
Division should be less than the unit weight. For example, if the unit weight
of good is 7 grams, you should use a scale with a division below 5 grams. If
the scale has division more than the unit weight, several goods can be used
as one unit but the accuracy will be influenced greatly.
2. Sample weight should be more than the Minimum capacity. For example,
the Min. capacity of a 3 kg scale is 20 g, so the sample weight should be
more than 20 grams.
3. Sample number is more than 200 pieces.
