ATIS 0600010 01-2014 Temperature Humidity and Altitude Requiprements for Network Telecommunications Equipment Utilized in Outside Plant Environments.pdf

1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-0600010.01.2014 Temperature, Humidity, and Altitude Requirements for Network Telecommunications Equipment Utilized in Outside Plant Environments As a leading technology and solutions development organization, ATIS brings together the top global

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5、erican Telecommunication Commission (CITEL). For more information, visit. AMERICAN NATIONAL STANDARD Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus

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11、onal Standards Institute. Notice of Disclaimer however, they are expected to remain within the Class 3 limits as specified in this standard. Examples of equipment ATIS-0600010.01.2014 4 that are likely to be located in a Class 3 Environment are similar to Class 2, but may also include an enclosure.

12、While the Class 3 Environment is protected from direct precipitation, it depicts an environment that was not originally intended to protect active electronics. As such, high humidity and condensing moisture may occur in this environment. Class 3 Environments are considered extreme and thus only appl

13、icable in special applications where these extreme temperature and humidity limits are deemed necessary by the service provider. The Class 3 temperature and humidity limits are beyond those defined in Telcordia GR-487-CORE. Class 4, Unprotected Environment: An environment where the equipment (electr

14、onics and cabinet/enclosure as a system) is directly exposed to the OSP environment. The equipment may be exposed to a wide range of temperature and humidity conditions that are uncontrolled, and as a result the ambient temperature and humidity surrounding the equipment is expected to be within the

15、Class 4 limits as specified in this standard. Examples of equipment systems which might be exposed to Class 4 Environments are repeater housings, apparatus cases, OSP DSLAMs, Cabinets, NEMA enclosures, Pedestals, INIDS, NIDS, or similar types of exposed equipment that includes the electronics and a

16、known or integral enclosure that provides the protection from the elements. Exposure to all outside elements could occur in this environment. 4.1 Operating Temperature Humidity Environment Table 4.1: Operating Environment Classification Env. Class Temperature Range1Humidity Range 2 -40 to 65C (-40 t

17、o 149F) 5 to 85% RH 3 -40 to 70C (-40 to 158F) 5 to 95% RH 4 -40 to 46C (-40 to 115F) plus solar loading 2 to 100% RH NOTE 1: These values represent the possible environmental extremes that may be encountered, not necessarily testing limits within this standard. 4.2 Operating Altitude Environment It

18、 is expected that network equipment may be routinely installed at elevations up to 1829 m (6000 ft) above sea level. In some cases, network equipment may be installed at elevations up to 3962 m (13,000 ft) above sea level. At high elevations, the lower density of the air reduces its cooling capacity

19、 Appropriate cooling capacity must therefore be provided. These criteria apply to all equipment. NOTE: For equipment with pressure sensitive components, the mechanical effects of reduced air density and pressure on components and assemblies must be considered. The high altitude environment is defin

20、ed in Table 4.2. ATIS-0600010.01.2014 5 Table 4. 2: High Altitude Environments Temp Altitude (Above Sea Level) Class 2 57C (135F) 1829 m (6000 ft) Class 3 62C (144F) Class 4 38C (100F) Plus Solar Loading Equipment intended for very high altitude installations, Class 2 40C (104F) 3962 m (13,000 ft) E

21、quipment intended for very high altitude installations, Class 3 45C (113F) Equipment intended for very high altitude installations, Class 4 21C (70F) Plus Solar Loading 4.3 Storage Is rectangular in shape, allowing multiple units to be placed closely together for a larger array of lights and for eas

22、y stacking of fixtures for a self-supporting configuration; The back of the fixture is removable allowing access to the bulb mounting and to provide additional cooling when the light is operated at high test temperatures; Includes a universal ballast that operates over a choice of voltages; and Acco

23、mmodates a 1000W metal halide bulb and is suitable for vertical operation. In order to optimize the uniformity and intensity of the light, the bulb mounting location can be moved deeper into the fixture and 12.7 cm (5 inch) reflectors can be added to the perimeter of the lights. The angle of the ref

24、lectors and the depth of the bulb mounting can be adjusted to provide the desired uniformity of the solar intensity. The metal halide light has a correlated color temperature of 5000K that provides an energy distribution close to natural light. The bulb is also suitable for universal orientation (ho

25、rizontal or vertical, base up or down). Intensity of solar flux: The intensity of the applied solar flux shall be measured normal to the gross surface contour illuminated at a minimum of six points per each surface. (It is recommended that the points be located on a rectangular grid with a maximum g

26、rid spacing of 30.5 cm 12 inches.) The measured intensity of the solar flux shall not be lower than the average intensity by more than 15%. Conversely, the measured intensity of the solar flux may be higher than the average intensity by more than 15%, but the intensity value used for the average cal

27、culation shall be limited to 15%. Measured solar flux intensity shall include both direct radiation from the solar simulator and reflected radiation from the test specimen. Reflectors and other such devices may be used to adjust the intensity directed upon the enclosure surface. Calibration of Solar

28、 Simulator: An ideal light source will produce a parallel beam of light from a parabolic reflector which will have a uniform irradiation throughout the beam. For most of the possible choices for a lighting array, the intensity will not be very uniform. Measuring the intensity on a grid of no more th

29、an 30.5 cm (12 inches) is acceptable if the average intensity between the 30.5 cm (12 inch) grid is about the same as the desired intensity, but it is more likely to be much greater or much less depending on the choice of light fixture and how the grid is aligned with lights. For example, an array o

30、f small lights spaced on a 30.5 cm (12 inch) grid will have higher intensity directly under the light and much less in-between. A fixture with the bulb perpendicular to the face of the light fixture will have an area directly over the bulb where the intensity is much less than the surrounding area.

31、Also, a fixture with the bulb mounted parallel to the face of the light fixture will have a greater intensity in the center of the fixture and much less at the perimeter. Given the geometry of a typical fixture, a grid spacing of 15.2 cm (6 inches) is a better choice to ensure an overall intensity c

32、loser to the desired level. Spectral Distribution: The spectral distribution of the solar simulator shall be reasonably close to that of natural sunlight, especially in the Visible and Near Infrared portions of the spectrum as indicated in Table 8. ATIS-0600010.01.2014 12 Table 6.5: Spectral Distrib

33、ution of Solar Simulator Spectral Region Wavelength (nm) Percentage of Spectrum of Natural Sunlight Percentage of Total Spectrum Required for Solar Simulator Lower Limit Upper Limit Ultra-Violet B 280-320 0.45% Not Required Not Required Ultra-Violet A 320-400 5.6% 2.0% 7.0% Visible 400-780 50.0% 45.

34、0% 55.0%Near Infrared 780-3000 43.9% 35.0% 53.0% Solar flux intensity and spectral distribution of the solar simulators shall be checked periodically as recommended by the manufacturer but not less frequent than every 500 hours of operation or 6 months, whichever accumulates first. Instrumentation u

35、sed to measure the solar flux intensity shall be accurate to within 10 W/m2(1 W/ft2) in the spectral region between 320-3000 nm. 7 Operating Temperature Humidity Test Methods R-3 (Required): Equipment intended for Class 2, 3, and 4 Environments shall be tested in accordance with the “Cold Start” tes

36、t described in clause 7, and shall comply with the applicable conformance criteria of clause 7. R-4 (Required): Equipment intended for Class 2, 3, and 4 Environments shall be tested in accordance with the “Hot Start” Test described in clause 7, and shall comply with the applicable conformance criter

37、ia of clause 7. R-5 (Required): Equipment intended for Class 2, 3, and 4 Environments shall be tested in accordance with the applicable “Operational Temperature and Humidity Cycling” test(s) described in clause 7, and shall comply with the applicable conformance criteria of clause 7. R-6 (Required):

38、 Equipment intended for Class 2, 3, and 4 Environments shall be tested in accordance with the applicable “Fan Failure” test described in clause 7 and shall comply with the applicable performance criteria of clause 7. Test results shall be recorded in a test report as described in clause 10 for requi

39、rements R-3, R-4, R-5, and R-6. NOTE: The Operational Temperature and Humidity Test is intended to demonstrate that the equipment is capable of operating and functioning as intended when temperature and humidity conditions are encountered as defined for a specific Environmental Class. It is not inte

40、nded as an accelerated life or reliability test. Informative Annex B contains a 100-cycle accelerated life test that can be used by manufacturers as part of their internal reliability or quality program. 7.1 Description These test methods use test sequences that validate proper equipment operation b

41、ased on the environmental temperature and humidity parameters specified in Table 4. 7.2 Test Apparatus however, actual production samples are not required. If testing is performed with pre-release hardware and changes occur prior to release, the changes must be analyzed to determine if they may reas

42、onably impact the outcome of the tests. If a significant impact is indicated, the testing shall be repeated on released hardware. These simulations are “type tests” and are generally performed on a single equipment assembly or a single integrated system. For the purpose of this test, an equipment as

43、sembly is the smallest grouping of equipment sold by the manufacturer as a standalone piece of equipment. Examples of equipment assemblies typically installed in Class 2 or Class 3 Environments include equipment shelves, fuse and alarm panels, multiplexers, etc. Examples of equipment assembles typic

44、ally installed in Class 4 Environments include integrated electronics/cabinets/enclosures such as INIDS, apparatus cases, repeater housings, pad/pole mount EECs, etc., where the electronics and cabinet/enclosure are a defined or unique system. This list is not intended to be all-inclusive, but rathe

45、r to provide guidance. When systems are marketed as integrated solutions, the tests shall be performed with the entire cabinet/enclosure populated with a representative deployment. The equipment under test shall be populated in a manner that either provides or simulates the highest expected heat loa

46、d, except for the cold start test. In some cases, it is impractical to monitor every function of a system. Monitoring of functional performance shall be reasonably practical with special emphasis on circuits that provide or control network traffic. 7.4 Preconditioning The equipment under test shall

47、be preconditioned and should be unpowered. The duration shall be at least 1 hour at the initial condition of 23C 3C (73.4F 5.4F) and 50% RH 10% RH. The equipment shall then be powered and enabled to provide its defined functionality. The equipment shall be allowed to reach stable internal temperatur

48、es before beginning the functional checks. Stable temperature is when the internal air temperature of the product changes no more than 2C (3.6F) per hour. ATIS-0600010.01.2014 14 7.5 Testing Note if conducting the following operational tests using the same equipment throughout, then it is recommende

49、d that the tests be conducted in the following sequence: 1. Hot Start 2. Cold Start 3. Operating Temperature, Humidity, and Altitude This sequence is intended to provide protection for the units under test. 7.5.1 Equipment Operation The equipment under test shall be in its operational state throughout the tests. Input and load conditions shall be chosen to obtain full utilization of the equipment under test, except for the cold-start test where the load shall be minimized, as detailed in the test plan. The equipment under test shall be instal