1、- SMPTE RPJ103 75 8357401 0001914 192 - SMPTE RECOMMENDED PRACTICE Care, Storage, Operation, Handling and Shipping of Magnetic Recording Tape for Television RP 103-1995 Revision of RP 103-1982 1 Scope This practice provides guidance to technical managers, archivists, and technicians for the care, st
2、orage, operation, handling, and shipping conditions that help maximize life expectancy and interchange perform- ance for television (video) magnetic recording tape. 2 Storage conditions 2.1 Temperature and humidity Tapes should not be stored in areas of extreme tem- perature and/or extreme humidity
3、for long periods of time (see table 1). Temperature and humidity in the storage area should be selected as follows: For short- and medium-term storage (up to 10 years): Temperature +15“C to +23“C Humidity 40% RH to 55% RH _ Page 1 of 5 pages For long-term storage (over 1 O years): Temperature +17“C
4、Humidity 30% RH 2.1.1 Variation from selected storage tempera- ture and humidity from above values should be kept within I 2C and I 5% RH throughout the storage period. 2.2 Airborne contaminants Floors should be finished so that dust and debris are minimized due to pedestrian traffic. Cement floors
5、should be sealed. Tile floors should not be waxed. Floor covering materials should be selected to minimize airborne debris and static generation. Air entering the storage area should be filtered to ensure or approach a class 100,000 environment as defined by Federal Standard 2!09D. Air pressure in t
6、he storage area shall be mainiained at a positive pressure relative to adjacent hallways and rooms. Table 1 - Summary of environmental conditioris Storage Medium term Long term Operations I O years Temperature* +17“C to +25“c +15“C to +23“C * Hu mid ity* 30% to 70% f 5% 40% to 55% * 5% 30% * 5% 5% t
7、o 80% Temperature gradientlhour 10C per hour nla nla 10C per hour Humidity gradientlhour 10% per hour nla nla 10% per hour Stray magnetic fields 800 Alm 800 Alm 800 Alm 4000 Alm *NOTE - For operations or medium-term storage, the center point for temperature and humidity can be selected anywhere with
8、in the allowable range, but the variation cannot exceed the allowable range. (10 Oe) (10 Oe) (10 Oe) (50 Oe) - Copyright O 1995 by the SOCIEW OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved December 7, 1994 RP 103-1995 2.3 Physical cha
9、racteristics labelsandotherdocumentationstoredwiththemedia. The recommended maximum levels are as follows: 2.3.1 To minimize the possibility of the tape taking an unwanted set due to stepped or scat- Sulfur dioxide (S02) 1.0 pg/m3 0.35 ppb tered winding, the tape should be given a Nitrogen dioxide (
10、02) 5.0 pg/m3 2.43 ppb 25.0 pg/m3 11.70 ppb continuous, full-length wind or rewind at the Ozone (03) transport manufacturers recommended wind acid CH3COOH) Use best tension and speed before storage. All magnetic recording cassettes may be stored in a fully wound or rewound condition, with the except
11、ion technology 2,6 Storageshelves of SMPTE type E (3/4-in video cassettes) which must be stored in a fully rewound condition. 2.3.2 Tape destined for long-term storage should have very few record/playback passes to maximize playback performance and minimize the probability of head clogging and physi
12、cal damage. 2.3.3 Open reel and cassette tapes should be stored in such a manner that they are supported by the hub by maintaining the plane of the flange perpendicular to the horizontal storage surface. 2.6.1 Shelving used for storage of magnetic media should allow the tapes to be stored verti- cal
13、ly in their shipping and storage cases with the tape identification label visible from the front. 2.6.2 Shelves should allow for adequate air flow so that the conditioned environment can be maintained throughout the storage area. 2.6.3 To avoid catastrophic damage, shelves should not be placed too c
14、lose to heat sources, water pipes, and sprinkler heads. 2-3.4 The tape should be stored in a clean! inert plastic container that provides protection from dust, atmospheric pollutants, and excessive moisture. Sealed plastic bags, cardboard Con- tainers, and sleeves are not recommended for storage. Ex
15、cept for labels, paper should not be stored inside a storage container . 2.3.5 The outer end of open reel tapes should be secured by an adhesive tab which leaves no residue on the tape after removal. Tab material is usually obtainable from the tape manufacturer. 2.6.4 Shelves should be designed to s
16、upport the weight of tape when fully loaded. Additionally, the shelves should be placed on a floor that can support the weight of a fully loaded shelving system. 2.6.5 The shelves should possess a lip of suffi- cient depth to Prevent dripping of melted Plastic and burning plastic Ont0 lower shelves
17、in case of fire. 2.6.6 Magnetic latches on tape storage cabinets should not be used, they could cauce 7 cm to the magnetic latch. 2.3.6 No splices, other than the splices attaching in tapes that are placed in long-term storage. the leader and trailer to the tape, shall be used partial erasure of tap
18、es if brought closer than 2.4 Stray magnetic fields 2.7 Periodic physical inspection The stray magnetic field at any point on the surface of the tape should not exceed afield strength of 800 A/m (10 Oe). 2.5 Environmental pollutants Certain gaseous impurities commonly found in the atmosphere should
19、be filtered out of the long-term storage environment in order to minimize the deterioration of the recording media and the paper Every tape in an archive should be physically inspected at least every 3 to 5 years for such things as tape playback performance, debris, contaminants, container gasket de
20、terioration, or other problems. This can be carried out by inspection of one-third to one-fifth of the archive each year. A full length windhewind should be completed on each tape at least once in every ten years, preferably during the periodic physical inspection. f Page 2 of 5 pages - SMPTE RPJ303
21、 95 8357403 OOOLLb Tb5 II 2.8 Identification Records containing proper date, control-number information, location, title, and other required information shall be maintained. 2.9 Smoking To minimize airborne debris and reduce fire hazard, smoking should not be allowed in the tape storage area. 3 Oper
22、ating conditions 3.1 Temperature and humidity The temperature and humidity in the operations area should be selected and maintained as follows: Temperature +17“C to +25“C Humidity: 30% RH to 70% RH 3.1.1 Variation from selected operating tempera- ture and humidity from the above values should be kep
23、t within 2 2C and 5 5% relative humidity. 3.1.2 Tapes that have been exposed to environ- mental conditions that are significantly different from planned operating conditions should be allowed to acclimate in the operating environ- ment for at least 24 hours before usage. The maximum temperature and
24、humidity gradient during transition should not exceed 1 O“C/hour or 10% RH/hour. This gradient refers to the maxim u m tem perat u re and h u m id i ty change that the tape (not the reel, cassette, or con- tainer) is subjected to. The tape should remain in its container during acclimation to help co
25、ntrol humidity and temperature gradient extremes. 3.2 Physical conditions The operations area should be maintained as closely as possible to clean-room conditions. The following guidelines will ensure that clean-room conditions are met: RP 103-1995 operations area shall be maintained at a positive p
26、ressure relative to adjacent hallways and rooms. 3.2.2 Floors Floors should be finished so that dust and debris due to pedestrian traffic ;ire minimized. Cement floors should be sealed. Tile floors should not be waxed. Carpeted floors shall utilize carpeting that minimizes debris and static generati
27、on. 3.2.3 Surfaces All surfaces of the tape transport that touch either side of the tape or carrier shall be cleaned in accordance with the method and frequency recommended by the tape transport manufacturer. Isopropyl or ethyl alcohol is an acceptable cleaning fluid for routine cleaning. Other clea
28、ning agents may be acceptable. Care should be taken so that the cleaning fluid does not contact the tape. For oiher than routine cleaning, such as removal of head clogs, use the transport manufac- turers recommended cleaning procedures. 3.2.4 Tapes Tapes should be kept in appropriate containers that
29、 provide a barrier to water and debris when not on the tape transport. 3.2.5 Restrictions Smoking, eating, and drinking should not be allowed in the operations area. 3.2.6 Threading For threading open reel tapes, the tape should only be handled by the eiids. Doors on cassette and cartridge tapes sha
30、ll not be opened unless the tape is inserted into the transport. 3.2.7 Cassette and open reel tapes Cassette and open reel tapes should be transported so that the tape is supported by the hub. Open reel tape flanges should never be squeezed together. The cassette loading door should never be used as
31、 a carrying handle 3.2.1 Airborne debris 3.2.8 Tape ends Air entering the operations area should be filtered to ensure or approach a class 100,000 environment, as defined by Federal Standard 209D. Air pressure in the Frayed or wrinkled ends of open reel tapes should be cut off, using nonmagnetic sci
32、ssors, prior to thread up. Page 3 of 5 pages SMPTE RP*103 95 8357401 0001927 9TL RP 103-1995 3.2.9 Opening cartons Cardboard cartons, such as master shipping cartons, should not be ripped open in the tape operations area, and cardboard use in the operations area should be avoided. 3.2.10 Dust and de
33、bris Tape containers should be wiped clean prior to open- ing or transportation to the operations area. 3.3 Stray magnetic fields The stray magnetic field at any point on the surface of the tape should not exceed a field strength of 800 A/m (10 Oe). 3.4 Winding All tapes should be uniformly wound or
34、 rewound as described in 2.3.1 whenever the tape comes out of long-term storage or has been subjected to significant temperature and humidity variations. 3.5 Cassette removal from transport Cassettes should be fully wound or rewound before removal from a transport. In cases where this is not immedia
35、tely possible, such as during an editing session, cassette load/eject cycles should be mini- mized. Cassettes should be fully wound or rewound at the end of the day. 4 Shipping conditions 4.1 Winding All tapes should be uniformly wound or rewound before shipment, as described in 2.3.1. 4.2 Container
36、s Tapes should be shipped in containers designed to withstand rugged handling and adverse environ- ments, and should contain adequate shock-absorbing material. Heavy reels, such as those used for 1 -in and 2-in open reel television magnetic recording tapes, should be supported by the hub and allowed
37、 to rotate freely inside the container. SMPTE type E (3/4-in) cassette tapes that do not provide self-locking reels shall be shipped in containers that provide hub locks. 4.3 Fastening Open reei tapes should be secured at the outer end as specified in 2.3.5. 4.4 Shipment marking Shipment of tape sha
38、ll be marked with appropriate symbols or wording to indicate that the package should be handled with care, protected from exces- sive heat, cold, and moisture, and protected from magnetic fields. 4 4.5 Vibration and impact loads Handling and transporting tapes should be done in a manner that will pr
39、event excessive mechanical loads that would distort or damage the tape or components. 4.6 Temperature and humidity Tape should be protected from excessive temperature and excessive humidity during transportation. The following limits should not be exceeded and the ex- tremes of these limits should b
40、e very short in duration: Temperature -20C to +45“C Humidity 5% RH to 80% RH 4.6.1 The maximum temperature and humidity gradient during transportation should not exceed lO“C/hour or 10% RH/hour. This gradient is the maximum temperature and humidity change that the tape is subjected to, not the reel,
41、 container, or cassette. 4.7 Stray magnetic field The stray magnetic field at any point on the surface of A/m (50 Oe). the tape should not exceed a field strength of 4000 4 4.8 Packing for transportation Sealed cardboard boxes are recommended for pack- ing approved tape containers for transportation
42、. While shipping video magnetic tape in the tape manufac- turers shipping container assures that the tape will arrive undamaged, shipping that container inside a cardboard box assures that the tape container itself will arrive clean and undamaged. I Page 4 of 5 pages RP 103-1995 4.9 Packing fill If
43、packed in cardboard boxes, use large, clean pack- ing material such as bubble sheets for fill. Do not use 6.2 container, shippiiig: A box or case that is designed to protect a magnetic tape from shock, moisture, and debris during transportation. s$rofoam peanuts, shredded paper, Or Other 6.3 contain
44、er, storagir: A box or case that is packing material, as the material can cause contami- nation and/or static problems. designed to protect a magnetic tape from shock, moisture, and debris during storage. 5 Other conditions 5.1 Health and safety 6.4 long-term storagi! conditions: The s t o rag e con
45、ditions suitable for preservation of recorded information for a period of greater than ten years. 6.5 maximum life exFectancy: The I e 9 Of time that information is predicted to be retriev- able in a system under storage conditions. 6.6 medium term storage conditions: The stor- age conditions suitab
46、le for preservation of recorded information from two to ten years. The operation, storage, and transportation of televi- sion magnetic recording tape shall be conducted in a manner that is consistent with the appropriate health and safety regulatory agencies. 5.2 Tape pack wind Tapes should be unifo
47、rmly wound or rewound as described in 2.3.1 to minimize physical damage. 5.3 Labels Tape labels should be sufficient in size to adequately identify the tape. Labels should have adhesive back- ings that will continue to adhere the label to the shell, reel, or container during long-term storage. Label
48、s should be constructed of inert materials. Label mark- ing should be accomplished with nonfading ink. 5.4 Electrostatic charge and discharge Maintaining the relative humidity within the operating conditions specified in 3.1 will minimize the impact of electrostatic charge and discharge on tapes and
49、 cassettes. 6.7 open reel tapes: Tape that is wound on a hub that is not enclosed in a shell. 6.8 short-term storage conditions: The storage conditions suitable for preservation of recorded information for less t Ian two years. 6.9 television magnetic recording tape: Magnetic recording tape used to record video and synchronizing signal:;. The tape may also record other signals such as audio or time code. 6.10 transport: A device designed to carry and guide magnetic recording tapes. NOTE - The recommenclations contained herein assume that all tape transports
