Barcode Scanner Common Knowledge
1. How to scan with a barcode gun?
First check the power supply of the barcode gun: external power supply or PC host power supply. If it is powered by the PC host, check the interface mode of the barcode gun, such as USB port, keyboard port, serial port, etc. If it is a USB port, it can be directly plugged into the host. If it is an RS-232 port or a serial port, you need to turn off the host. Connect the cable of the barcode gun and turn on the PC. Then read the manual of the barcode gun and set it by scanning the barcode on the user manual. After the setup is complete, you can scan and upload the data to the computer.
2. What is depth of field?
Depth of field means that the barcode bar code gun can scan the distance between the nearest point and the farthest point of the barcode.
3. What is the difference between the RS-232 port and the keyboard port?
The main difference between commonly used interfaces is that they send data to the terminal in different ways. The keyboard port is a device that connects the keyboard and the terminal. When the keyboard port is used, the bar code symbol is regarded as the data sent by the keyboard by the terminal, and the keyboard port of the terminal can continue to function. RS-232 is used to connect the serial port of the host or terminal to send serial data to the computer. Because serial communication requires a certain protocol, the device using RS-232 must specify the baud rate (data transmission rate) and data bit. And parity bits.
4. How do I know the code system of the scanned barcode?
You can refer to the user manual of the bar code gun, in the parameter part of the bar code output or add the suffix part, this function will add a prefix character before the bar code character, which represents the type of bar code read, which can be found by looking up the table of the manual. Confirm, such as: "b" stands for 39 yards, "c" stands for UPC code, and so on. The specific situation depends on whether the scanner provides this support.
5. How to upgrade the decoding software of the barcode reader?
Download tools via flash and software. New versions of the software and download tools such as QuickLoad and Visual menu can be downloaded from the HHP website.
6. What is the maximum length of the barcode scanner cable?
The RS-232 length standard developed by the Electronics Industry Association is up to 15 meters. The typical RS-232 cable length of the HHP bar code reader is 2.75 meters and 4.7 meters; the length of the light pen simulation cable is 2.1 meters or 4.5 meters; HHLC cable The length is 2.1, 4.5 or 6.7 meters; the length of the OCIA cable is determined by the type of terminal and can be customized to the factory; the length of the keyboard cable is usually 2.7 meters, and the 4.7 meter keyboard cable requires an external power supply.
7. Barcode scanners can not read barcodes for several reasons:
1) The function of reading such a barcode is not turned on. (There are a lot of bar code rules. Generally, bar code guns can only recognize common bar codes unless they are specifically required).
2) The bar code does not conform to the specification, for example, the necessary blank area is missing, the contrast of the bar and the space is too low, and the width and width of the bar and the space are not suitable.
3) Direct sunlight, the photosensitive device enters the saturation zone.
4) The surface of the barcode is covered with a transparent material, and the degree of reflection is too high. Although the eye can see the barcode, the collector has strict reading conditions and cannot be read.
5) The cable is loose and there is no power supply, so it cannot be scanned.
6) Hardware failure, contact your dealer for repair.
8. Why did the battery placed in the wireless scanner have no power after one night?
The battery in the wireless scanner supports both the decoding circuit and the RF motherboard. When the reader is not working, its decoding circuit stops working, but the RF motherboard continues to contact the associated base station within the communication distance, even if the base station It has been closed and is constantly being searched. The charge battery can last for 12 hours without the reader being used. Therefore, during the night, the battery should be charged to ensure full support for the next day's work.
source:
Knowledge classroom
This product is basically suitable for all cats and dogs. It can clean up messy hair to remove hair and dirt. Especially for pets with long hair, it can be combed and smoothed well. Combs with a denser tooth pitch can make the hair smoother and make the pet look neater and more beautiful. How to use: If your pet's coat is too thick, comb it layer by layer to avoid hurting your pet, just follow the growth direction of the pet's hair.
Pet Comb,Comb Pet Grooming Tools,Pet Comb Dog Grooming Tools,Pet Comb Cat Grooming Tools
DongGuan Lucky Pet Products Co., Ltd. , https://www.dgpetproducts.com