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3. OPERATING PRECAUTIONS
Be careful of the following precautions and use the products properly in order to deliver and maintain the
full performance of the products.
Using Products
Precautions for using conditions
◆ Be careful not to drop or bump the products on a hard surface.
◆ DO NOT install the products in direct sunlight.
◆ Be careful about the ambient temperature and humidity.
Suitable environment for the use of the printer is as follows:
Range of the temperature Range of the humidity
Printing -10°C to 50°C
(14°F to 122°F)
30%RH to 85%RH
(Non condensing)
Charging 0°C to 40°C
(32°F to 104°F)
30%RH to 75%RH
(Non condensing)
See "MP-B20 SERIES THERMAL PRINTER TECHNICAL REFERENCE" for the certifiable
humidity range at each temperature.
◆ DO NOT install the products near devices that generate strong electromagnetic fields such as a
copy machine motor.
◆ DO NOT install the products in a location that is subject to corrosive gas, siloxane and so on.
Precautions when using or driving
◆ DO NOT print without the thermal paper.
◆ DO NOT use thermal papers taped together.
◆ NEVER pull out the thermal paper when the thermal paper is set.
◆ DO NOT open the paper cover during printing.
◆ DO NOT touch the thermal paper during printing. Covering the paper outlet or pulling out the
thermal paper when ejecting may cause a paper jam or line feed failure.
◆ DO NOT connect or disconnect the USB cable during printing or transmission.
DO NOT touch the USB cable plug during printing.
◆ When handling the printer, be aware of static electricity. When the static electricity is discharged,
this could cause a USB interface failure.
When this problem occurs, disconnect the USB cable plug that is connected to the printer from the
host device, and wait a few seconds before connecting it again.
◆ DO NOT use the thermal head when it is wet. Doing so may damage the printer.
◆ Using the printer under low temperature environment or printing at a high print rate might cause
unclear printing or generate loud sound. This is not a failure in the printer but an inherent paper
phenomenon.
◆ Continuous printing with high print rate might cause temporarily stop printing by temperature
detection of the printer. Printing resumes when the printer's temperature cools down. When this
error occurs and "Data discarding when error occurs" in the Function Settings is "Enabled", the
transmitted print data while this error occurs is discarded.
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