How to buy a suitable Data collector?(1)
First, we need to understand what a portable data collector is.
According to the different uses of data collectors, they can be roughly divided into two categories: online data collectors and portable data collectors.
Online data collector
The on-line data collector can be divided into desktop and connection type. Most of them are directly powered by the AC power supply. Generally, they are not used independently. Data is transmitted between the collector and the computer through the cable connection. It cannot be used offline.
There are generally two ways in which the scanner transmits data to the computer: one is keyboard emulation; the other is transmitting data to the computer through the communication port. For the former, there is no need for separate power supply, and the power is derived from the inside of the computer; the latter requires separate power supply.
Therefore, the on-line data collector must be installed in a fixed location, and the bar code symbol must be read before the scanner. At present, some logistics companies have begun to use them in their warehouse management. Due to the limitations of the scope and use of online data collectors, they cannot be used in applications that require off-line use, such as stock counting, scanning of large items, etc. In order to make up for the inadequacies of online data collectors, portable data collectors came into being.
Portable data collector
The portable data collector is designed to adapt to some field data acquisition and scanning bar code symbols for bulky objects, and is suitable for offline use. When reading, contrary to the on-line data collector, it scans the scanner before it is brought to the bar code symbol. Therefore, it is also referred to as a hand-held terminal and a checkout machine.
It is battery-powered, and the communication with the computer does not occur at the same time as the scan. It has its own internal memory, can store a certain amount of data, and can transmit this data to the computer at the appropriate time. Almost all portable data collectors have a certain degree of programming ability, and when coupled with an application program, they can become very powerful special-purpose devices, which can meet the application needs of different occasions.
More and more logistics companies have turned their attention to portable data collectors. Some logistics companies in China have used portable data collectors for warehouse management, transportation management, and item tracking.
Scope of application
Users should choose different portable data collectors according to their own different situations.
If the user is using a portable data collector in a large-scale, three-dimensional warehouse, due to the high storage location of some items and the distance from the operator, we should choose a large depth of field, a long reading distance and a high first reading rate. Collector.
For users of small and medium-sized warehouses, the requirements in this area are not very high, and you can choose some collectors with complete functions and easy operation.
For the user to choose a portable data collector, the most important point in the selection is “enough to use”, that is, the purchase is applicable to their own needs, rather than blindly purchasing an expensive, powerful acquisition system.
The decoding range is an important indicator for selecting a portable data collector.
Each user has his or her own barcode code range. Most portable data collectors can recognize several codes or even dozens of different code systems such as EAN codes and UPC codes, but there are great differences.
In the application of logistics enterprises, we must also consider EAN128, 39, Kudaba, etc. Therefore, when the user purchases, he must fully consider the coding range of his own application to select an appropriate collector.
The interface capability of the collector is another important indicator for evaluating its function, and it is also a key consideration when selecting the collector.
When purchasing, the user must first clarify the operating environment and interface mode of the original system, and then select a portable data collector that adapts to the operating environment and interface.
Requirements for first-rate reading
The first reading rate is a comprehensive indicator of the data collector. It has a certain relationship with the print quality of the bar code symbol, the design of the decoder and the performance of the scanner.
The higher the first reading rate, the more time-saving work time, but correspondingly, its price is also necessarily higher than other portable data collectors. During the inventory (inventory) of the item, the barcode symbol can be manually controlled to be repeatedly scanned by the portable data collector.
Therefore, the requirement for the first reading rate is not strict, it is only a measure of work efficiency. However, in the automatic delivery system, the requirement for the first reading rate is high.
Of course, the higher the first-read rate of the portable data collector, it will inevitably lead to an increase in its bit error rate. Therefore, when the user selects the collector, he must purchase a collector that meets the system requirements according to his own actual situation and economic ability. Both the rate and the error rate are balanced.
When choosing a portable data collector, its price is also a concern.
Because of the different configurations and different functions of portable data collectors, the price will vary greatly.
Therefore, in the purchase of collectors should pay attention to the product's performance to price ratio, in order to meet the application system requirements and the lower price for the purchase of objects, truly "affordable."