Guangzhou State Association, Honeywell barcode scanner, scanner provided by the Guangzhou State Association. We are Guangzhou City State Association Information Technology Co., Ltd. (www.gzdb899.com) located: Guangzhou specializes in: cash register, scanner, bar code machines, management software, small ticket machines, cash registers, shredders scanner can not Common causes of reading the bar code scanning first one may be due to direct sunlight, photographic scanner device into the saturated zone could lead to not read. The second reason does not meet specifications because Honeywell barcode bar code scanner, bar and air caused by the contrast is too low. A third reason may be because there is no open bar code reading function. The fourth may not appropriate because the width of the proportion caused. The fifth reason is the bar code surface covered with the transparent material, glare may be too high, Motorola barcode scanner, barcode eye can see, but because of reading acquisition strict conditions, which can not be read, so that will not be read take. Sixth, if not more so, is the fault of the hardware. Construction scanner classification in recent years to the merchant POS system has brought great benefits, construction of the system is also inseparable from the barcode scanner laser laser bar code scanner, bar code as an input connected to a link with the system, bar code scanner plays an irreplaceable role. Under the user to select a reliable and cheap in price performance of the scanner, the first thing you must understand how to select the scanner, scanner which classification. Here are some scanner classification, the most important business applications, there are three: CCD scanner, handheld laser scanner and the whole point of the laser scanner. A, CCD barcode scanner CCD barcode scanner is the use of optical coupling (CCD) principle, barcode printing pattern is imaged, and then decoded. Advantages are: no shaft scanner, motor, long life; cheaper prices. When selecting CCD scanner, the most important are the two parameters: depth of field due to CCD imaging principle is similar to a camera, if you want to increase the depth of field, to increase the corresponding lens, so that the CCD size is too large, inconvenient operation. Excellent CCD should not be close to the bar code can be read, and moderate size, comfortable operation. Second, the laser handheld barcode scanner handheld laser bar code scanner is the use of laser diodes as a light source, single-scanner, which are mainly rotating mirror and chatter mirror two. Commercial enterprises in the choice of laser bar code scanner, the most important thing is to pay attention to the scanning speed and resolution, and the depth of field is not the key factor. Because when the depth of field increases, the resolution will be greatly reduced. Excellent hand-held laser scanner scanning speed should be high, a fixed depth of field high resolution.