Comparison CAS SW-5 DD vs CAS SW-5

Scale division is the smallest unit of measurement used in weighing. This indicator directly describes the accuracy the weight is measured. For example, with a scale division value of 1 g, weighing, respectively, will be carried out with an accuracy of a one gram.

In bench scales (see "Suitable for"), the division value does not exceed 10 g, and most often it is even less ( 2 g or 5 grams); the minimum value is 1 g. In turn, floor type scales such accuracy is much less common — the scale division could be 50 g, 100 g, or even 200 g. This is due to the fact that in weighing of heavy loads, high accuracy is usually not required.

The availability of a double-sided display in the scales — usually, placed on a stand. This feature is typical for bench models (see "Suitable for") used on countertops: both the seller and the buyer standing on the opposite side of the countertop with scales can see the readings on such a display.

Such a connection can be used for different purposes: setting up PLUs into the scale's built-in storage (see "Functions and Features") and editing such PLUs, collecting usage statistics, etc. Connection options can be as follows:

— RS232 (COM). A specialized connector used for direct connection to computers, cash registers and some other types of equipment. This interface is convenient in cases where there is only one scale at the point of sale (or when each scale is connected directly to its control device), but to connect several scales to one control device at once, it is more convenient to use network interfaces — LAN or Wi-Fi (see below).

— Ethernet. Standard connector for wired connection to local computer networks. With Ethernet, the balance can operate as a network device; this gives more connectivity options than the RS-232 interface. Thus, access to the device can be obtained from any computer on the network (with appropriate access rights settings), and vice versa, several scales can be “linked” to one control computer. Among the disadvantages of such a connection is the need for a router/switch for the operation of network equipment.

— Wi-Fi. A technology used both for wireless connection to computer networks and for direct communication between devices. The first option is similar in its fe...atures to Ethernet (see the relevant paragraph) — adjusted for the fact that you do not need to put a cable for connection. This makes the connection as fast and convenient as possible, but wireless equipment is somewhat more expensive than wired ones. Direct connection to other devices (laptops, tablets, etc.) is extremely rare in trading scales, but it can also be provided — usually as an addition to the common, “networked” Wi-Fi mode of operation.

Note that in some devices, the interfaces described above can be combined — in particular, scales equipped with both RS-232 and Ethernet are still manufactured, and even models that combine all three connection types. This provides versatility in application, but somewhat affects the cost.

— Tare function. A function that allows you to take into account the weight of the tare/package during the weighing and determine the net weight of the items without tare. Usually this function works like this: an empty container is placed on the scales, a special button is pressed, and the instrument readings are reset, so that further weight measurements are carried out without taking into account the packaging.

— Counting mode. Scales that support the counting mode. In this mode, the device works as a kind of calculator, which allows determining the average weight of one item during batch weighing, as well as the total number of items by their weight. For example, you can put several weighed items on the scales, turn on the counting mode, set the quantity — and the scales will automatically calculate the average weight of one item; on the contrary, you can set the average weight from the keyboard of the scales and determine the number of items in the heap or stack to be weighed.

— Auto zero tracking. Function of automatic installation of indications of scales on a zero. In most cases, we are talking about the fact that when the load is removed (a rapid decrease of the load on the platform to almost zero value), the device ignores small measurement errors and immediately sets the weight to zero. This allows you to avoid situations when the scales show a non-zero value when the plat...form is empty, and to dispense with additional measures such as turning the device off and on. In some models, set to zero can be done manually by pressing a special button, but this function is not considered as auto-track.

— Price calculation. Ability to use scales to automatically calculate the cost of goods. To do this, just enter the price per kilogram from the keyboard or select the desired item from the scales' memory (see "PLU storing in built-in memory") — and the device will display the cost of the weighed goods.

— Total cost. Possibility of work of scales in the mode of accumulation of the sum. In this mode, the seller sends to the memory the cost of each purchase by pressing a special button, these values are automatically summed up, and then they can be displayed on the screen. This feature makes it much easier to calculate the total cost, especially if you buy a lot of different products.

— Change calculation. The ability to use scales to automatically calculate the change from a certain amount. To do this, having determined the total cost of the purchase (for example, by accumulating the amount — see the relevant paragraph), the seller enters the amount from which you need to give change, presses a special button — and the scales display the amount of change on the screen.

— PLU storing in built-in memory. Possibility of recording certain goods prices directly into the memory of scales. Due to this, the determination of the cost of goods is noticeably simplified: instead of manually entering the price for each item, it is enough to enter the item code or select the desired direct access key (see the relevant paragraph). Item memory can be especially useful if scales are used as part of a computerized sales accounting system.

— PLU direct keys. Availability of keys for direct access to PLUs (see "PLU storing in built-in memory"). With this function, the choice of goods is simplified as much as possible: instead of entering its digital code, it is enough to press the corresponding button. In some models, the keys are quite large, and you can even put the pictures with goods on them.

— Printing labels/stickers. Ability to use scales to print labels for weighed goods. In addition to information on weight and cost, a barcode can also be printed on such stickers — during the calculation, it is read by the cash register and sales data are entered into the general accounting system. However, there are models without barcode printing, this point should be clarified separately.

— Standby mode. Ability to work scales in standby mode. In this mode, the power consumption of the device is reduced to the minimum, the display is off, however, the scales are ready for operation and “wake up” as soon as any load is put on the platform. This feature is especially useful for models with a built-in battery (see "Power supply") — it can significantly save battery power. The standby mode can be activated either automatically (after a certain period of inactivity) or manually, depending on the model.

— Automatic shutdown. A function that turns off the power of the scale after it has been idle for a while. This helps to decrease electricity consumption, and in models with a built-in battery — increases battery life. Auto-shutdown, usually, works with rather long downtime — half an hour or an hour; for breaks of shorter duration in the same scale, a standby mode can be provided (see the relevant paragraph).