Hitachi HDS723020BLA642 Specification, Environment, Temperature and humidity, Corrosion test

7K200 SATA OEM Specification

6 Specification

6.1Environment

6.1.1Temperature and humidity

	Operating conditions
Temperature		5 to 55°C (See note below)
Relative humidity		8 to 90% noncondensing
Maximum wet bulb temperature		29.4°C noncondensing
Maximum temperature gradient		20°C/hour
Altitude		–300 to 3048 m (10,000 ft)
Nonoperating		conditions
Temperature		–40 to 65°C
Relative humidity		5 to 95% noncondensing
Maximum wet bulb temperature		40°C noncondensing
Maximum temperature gradient		20°C/hour
Altitude		–300 to 12,192 m (40,000 ft)

Table 12. Environmental condition

The system is responsible for providing sufficient air movement to maintain surface temperatures below 60°C at the center of top cover and below 63°C at the center of the drive circuit board assembly.

The maximum storage period in the shipping package is one year.

Specification (Environment)

	100
										41'C/95%
	90							31'C/90%			W etBulb 40'C
	80
(%)	70
											W etBulb29.4'C
Humidity	60		Non Operating
	50
							Operating
Relative	40
	30										65'C/23%
	20									55'C/15%
	10
	0
	-45	-35	-25	-15	-5	5	15	25	35	45	55	65

Temperature (degC)

Figure 1. Limits of temperature and humidity

6.1.2Corrosion test

The hard disk drive must be functional and show no signs of corrosion after being exposed to a temperature humidity stress of 50°C/90%RH (relative humidity) for one week followed by a temperature and humidity drop to 25'C/40%RH in 2 hours.

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