Rev 1.0
1/27/14
51
51
Reference Guide
Reliability Compliance and
Recommended Standards
Document
Current
Version
Title
IEC60068238
2.0
Environmental testing - part 2-38: Test Z/AD: composite
temperature/humidity cyclic test.
IEC60068240
1.0 w/A1
Basic environmental testing procedures - part 2: Test Z/AM combined
cold/low air pressure tests.
ISO167501
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 1: general.
ISO167502
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 2: electrical loads.
ISO167503
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 3: mechanical loads.
ISO167504
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 4: climatic loads.
IEC60529
2.1 w/COR2
Degrees of protection provided by enclosures (IP code).
IEC60068217
4.0
Basic environmental testing procedures - part 2: Test Q: sealing.
IEC60068218
2.0
Environmental testing - part 2-18: Tests - R and guidance: water.
IEC60068270
1.0
Environmental testing - part 2: tests - test XB: abrasion of markings and
letterings caused by rubbing of fingers and hands.
IEC60068268
1.0
Environmental testing - part 2: tests - test l: dust and sand.
IEC60068211
3.0
Basic environmental testing procedures, part 2: test KA: salt mist.
IEC60068260
2.0
Environmental testing - part 2: Test KE: flowing mixed gas corrosion test.
IEC60068252
2.0 w/COR
Environmental testing - part 2: Test KB: salt mist, cyclic (sodium chloride
solution).
8.3. Environmental Specifications
The USR3500 is compliant with the operating classes listed below. The ideal
temperature range of the environment for each operating class is also specified.
Table 38. Operating Class Temperature Range
Conditions
Temperature Range
Operating / Class A
-20 °C to +55°C
Operating / Class B*
-30 °C to +75°C
Operating / Class C*
-30 °C to +85°C
Storage*
-40 °C to +85°C
*
Refer to the
Footnotes
of Table 29 Real Time Clock Specifications for RTC battery related issues.