继上篇笔者为大家整理了
条形码读取失败的一些案例后，
本篇将为大家介绍普及以下内容：
1. 条形码基础知识篇
2. 罗氏诊断各类仪器条形码要求篇
条形码基础知识篇
条码结构
宽条和窄条
二进制和多层
什么是校验位
条码的种类
条码读取的原理
罗氏诊断各类仪器条码要求篇
cobas e 411
Sample Barcode Specification
“NW 7” allows the use of 6 digits + 1 digit with check digit.
In case of “Interleaved 2 to 5”, the number of ID digit is fixed (at an even number of digit).
For “Code 128”, the check digit should be always given.
With or w/o check digit has to be chosen. Mixed use is not available.
Label size
The label size when attaching it with reference to the uppermost edge of the test tube mouth is shown in Figure 1.2-6.
A quiet zone of more than 5mm should be provided at both ends of the symbol as shown in Figure 1.2-5.
However, for RD calibrator/control vials, a quiet zone of more than 3mm should be provided at both ends of the symbol as shown in Figure 1.2-6.
Bar and Space
Bar code read zone
The bar code label must be attached to each test tube in bar code zone as shown in Figure 1.2-7.
cobas 6000
Barcode area and scanning range
Allowed characters in ID digits
Width of the bar and the space
Reflection rate and PCS value
Label Dimensions
cobas 8000
Number of ID digits
NW7 provides a check digit and enables the use of 6 digits + 1 digit.
With ITF, the number of ID digits (including the even-number digits) is fixed.
With Code 128, the check digit is always given.
Check digit provided or not can be selected.
Barcode range and scanning range
Leave blanks of at least 5 mm on both ends of barcode label, and paste it straight with the axis of blood collection tube.
Character usable for ID
Dimensions of label
1.
Widths of bar and space
Width of thin bar: 0.19 ~ 1 mm
Thin bar : thick bar ratio: 1:2.5 (1:2.0 ~ 1:30)
2.
Reflection ratio and PCS value
Space reflection rate: At least 70%
PCS value: At least 0.7
3.
Color
Bar: Black
Space: White
LI
文章作者：宋健入
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