Dell ST2220TC appendix Maintenance Guidelines, Cleaning Your Monitor, Humidity, Altitude

Non-operating	Storage: -20° to 60° C (-4° to 140° F)
	Shipping: -20° to 60° C (-4° to 140° F)
Humidity
Operating	10% to 80% (non-condensing)
Non-operating	Storage: 5% to 90% (non-condensing)
	Shipping: 5% to 90% (non-condensing)
Altitude
Operating	3,657.60 m (12,000 ft) max
Non-operating	12,192 m (40,000 ft) max
Thermal dissipation	222.3 BTU/hour (maximum)
	188.1 BTU/hour (typical)

Maintenance Guidelines

Cleaning Your Monitor

CAUTION: Read and follow the safety instructions before cleaning the monitor.

CAUTION: Before cleaning the monitor, unplug the monitor power cable from the electrical outlet.

For best practices, follow the instructions in the list below while unpacking, cleaning, or handling your monitor:

•To clean your touch screen, use the supplied soft, clean cloth. Do not use benzene, thinner, ammonia, abrasive cleaners, or compressed air. Avoid wiping the top corners of the monitor where the optics are located.

•Use a lightly-dampened, warm cloth to clean the monitor. Avoid using detergent of any kind as some detergents leave a milky film on the monitor.

•Handle your monitor with care; any scratch on the monitor will show scuff marks.

•To help maintain the best image quality on your monitor, use a dynamically changing screen saver and turn off your monitor when not in use.

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