The scale should be situated on a flat, level and stable surface. The scale platform should be securely fastened to the scale sub-platform. The scale can be affected by electrical and RF (Radio Frequency) interference. Operation near power transmission lines is not recommended. Operation near appliances which switch on and off with heavy currents (letter openers, copiers, microwave ovens) is not recommended. The recommended operating temperature for the scale is room temperature (around 25°C). Allow the scale three hours to adjust to the new climate if the scale was stored in a location a hot/cold environment. If the scale is to be operated in environments above or below room temperature, it is recommended that the scale be re-calibrated in that environment after a three hour adjustment period.

Overload can have different meanings, all having to do with a weight that is too high. It may mean the weight placed on the scale exceeds its capacity, such as putting 6.8 kg (15 lbs) on a 4.5 kg (10 lb) scale. On a rate-calculating scale, it may mean you are trying to perform a function which cannot be performed with the weight registered on the scale, such as attempting to send a 2.2 kg (5 lb) letter using a service restricted to 450 g (1 lb) letters. Symbols of overload include OVLD and OOOO.

The only sure way to determine if your scale is weighing correctly is by placing a known weight on the scale. Examples of a "known weight" would include a piece from a precision weight set, or perhaps a measured weight used for exercising.

The S100 and S250 minimum weight that can be read is 450 g (1 lb). The S400 minimum weight that can be read 1.1 kg (2.5 kg).

Place the scale on a flat and level surface. Power on the scale by connecting it to a computer with an available USB port. The computer must be powered on. Press and hold the Tare button for two seconds. After two seconds the screen will briefly display CAL followed by 0.0. Press the Tare button. The screen will now display 5.0.0. Place a calibrated 2.2 kg (5 lb) on the scale. Press the Tare button once more. The screen will briefly display Cal, followed by Pass. Remove the weight from the scale and disconnect the USB cable.

Straight weigh scales only weigh items, they don't calculate postage or delivery rates. However, USPS, UPS, FedEx and DHL offer rate calculators on their website. You will be able to display the cost of sending your package with this tool.

Due to the implementation of a new zoned rating structure by the USPS in May of 2008, Express Mail rates will no longer be supported on DYMO scales. When selecting the Express Mail rates option, the scale will display 0.00.

The DYMO 2.2 kg (5 lb). USB Scale receives power directly from the computer through USB. If not used in conjunction with a computer, the scale can also be powered by a 9-volt alkaline battery.

You cannot share the DYMO 2.2 kg (5 lb) USB scale to other users on a network like you would a printer or a scanner. However, because the DYMO 2.2 kg (5 lb) USB scale requires no special drivers, you can easily connect it to any computer.

We do not recommend that our scales be submerged in any type of fluid. You may clean the tray of the scale with a mild cleaner.

A load cell is a mechanism in the scale which bends slightly when weight is put onto the platform. The microcomputer in the scale measures the amount of bending and translates that into the digital display, which is the weight.