1、 A-A-59131A 19 March 2004 SUPERSEDING A-A-59131 08 OCTOBER 1997 COMMERCIAL ITEM DESCRIPTION DETECTOR, METAL FLAW, ELECTRONIC The General Services Administration has authorized the use of this Commercial Item Description for all federal agencies 1. Scope. This Commercial Item Description (CID) define
2、s the minimum performance and technical requirements for a lightweight microprocessor-based eddy current flaw detection instrument suitable for Nondestructive Inspection (NDI) use in a military aircraft maintenance environment, which may be at fixed military bases, deployed to austere forward operat
3、ing locations, or naval vessels afloat. 2. Classification. There are four classifications of metal flaw detectors. Type I Kit with bolthole scanner and accessories for Air Force organizations. Type II Kit with accessories but without bolthole scanner for Air Force organizations Type III Kit with bol
4、thole scanner and accessories for Naval Air Systems Command organizations. Type IV Kit with accessories but without bolthole scanner for Naval Air Systems Command organizations. AMSC N/A FSC 6635 Comments, suggestions, or questions on this document should be addressed to AFRL/MLS-OL, 4750 Staff Driv
5、e, Bldg. 3220 Door 1, Tinker AFB OK 73145-3317. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
6、se from IHS-,-,-A-A-59131A 23. Salient Characteristics: 3.1 General. The unit shall use a microprocessor-based, impedance plane display, and have dual frequency capability. 3.2 Foreign Object Damage. The unit shall be designed to prevent loss of components, which could generate foreign object damage
7、 to aircraft or engines. 3.3 Size and Weight. The unit size shall not exceed 432 cubic inches, with any dimension exceeding 12 inches. The weight shall not exceed 7 pounds with batteries installed. 3.4 Power Requirements. The unit shall operate when supplied with either 100-250 Volt Alternating Curr
8、ent 50 or 60 Hertz (100-250 VAC 50/60 Hz) automatically selected and connected directly, through means of a battery charger connected to 100-250VAC-50/60Hz, or batteries/battery pack(s) as described below. 3.4.1 Battery Charger. The unit shall be supplied with a separate battery charger that is able
9、 to simultaneously charge the batteries/battery pack(s) and supply power to operate the instrument (if required). 3.4.2 Battery Duration. The cells in the rechargeable battery pack(s) shall not have a charge “memory” limitation that causes the unit to operate for less than the specified time, and pr
10、ovide at least 8 hours of continuous use without scanner or display backlighting, and at least 4 hours of continuous use with both scanner and backlighting at 68 degrees Fahrenheit. The unit must incorporate a visible means of indicating the charge condition of the battery pack(s) and shall provide
11、a low battery warning in order to perform a post-calibration before the battery is exhausted. A minimum of two (2) complete sets of batteries/battery pack(s) shall be provided, so that one set may be charging while the other set is powering the instrument. 3.4.3 Battery Charging. The batteries shall
12、 be easily rechargeable without tools and require no longer than 4 hours to charge from 50% to 100% capacity, nor more than 8 hours for a complete charge. 3.4.4 Battery Replacement. The unit shall be capable of continuous 24 hour per day 7 day per week operation, by swapping rechargeable battery pac
13、ks by the user without tools and within 90 seconds while meeting the requirements of paragraph 3.3. If designed for use with other than common commercially available worldwide (e.g. AA or D cell) batteries, an auxiliary battery pack designed for AA or D cells shall be provided, which shall connect t
14、o the flaw detector. The auxiliary battery pack is not subject to the requirement of paragraph 3.3. If designed for proprietary battery packs, the government shall acquire the design specifications and a limited license for manufacture after contract expiration. Provided by IHSNot for ResaleNo repro
15、duction or networking permitted without license from IHS-,-,-A-A-59131A 33.5 Controls. The unit function controls shall be menu driven. As a minimum, the unit shall accommodate control of the following functions. 3.5.1 Frequency. The operating frequency shall be selectable from 60 Hz to 6 MHz (minim
16、um range), with a precision of two significant digits (i.e. 1 Hz steps from 60-100Hz, 10 Hz steps from 100Hz-1kHz, 100Hz steps from 1-10kHz, etc). The frequency synthesizer shall be accurate to within five (5) percent of the selected value. The unit shall be capable of dual frequency operation. 3.5.
17、2 Gain. The unit shall be capable of at least 85 dB of amplification range for both the vertical (y) and horizontal (x) axis. 3.5.3 Probe Drive. The unit probe drive circuit shall allow the equipment operator to vary the signal driving the probe independent of gain and frequency adjustment. 3.5.4 Ph
18、ase Rotation. The unit shall be able to rotate the eddy current impedance vector, as viewed on the display, through a full 360 degrees in one degree or smaller increments in either the clockwise or counter-clockwise directions. 3.5.5 Filters. The unit shall be equipped with high pass, low pass, and
19、bandpass filters. The low pass filter shall be selectable from 10 Hz to 500 Hz minimum range, and the high pass filter shall be selectable from 0 to 200 Hz minimum range. 3.5.6 Alarm Function. The unit shall incorporate an alarm (gate) system that will trigger an audible and/or visual alarm when the
20、 test signal enters or leaves a designated alarm zone. The alarm function shall be adjustable for size, position, and shape, and useable in both the impedance plane and sweep modes. 3.5.7 Programmable Test Procedures. The unit shall have the capability to program, store, and recall a minimum of 50 i
21、nstrument test parameter settings. The instrument memory shall enable alphanumeric labeling of programs. Programmed instrument settings shall be adjustable after recall. The memory shall retain the settings for a minimum of 300 hours after electrical power is turned off and primary batteries are rem
22、oved. 3.5.8 Screen Capture. The unit shall have the capability to freeze and store at least 20 screen displays for subsequent review or download to PC or printer. 3.6 Instrument Display. The display shall have a minimum area of 13 square inches with a minimum resolution of 76,800 total pixels. The d
23、isplay shall be easily seen both in bright light (i.e. flightline 500 foot-candles) or low light (i.e. hanger 10 foot-candles) conditions. The display shall have a selectable graticule for both major and minor divisions. Provided by IHSNot for ResaleNo reproduction or networking permitted without li
24、cense from IHS-,-,-A-A-59131A 43.7 Persistence. The display persistence shall be variable and adjustable from 0.1 to 10 seconds minimum range, or until cleared by the operator. 3.8 Display Modes. The unit shall display eddy current inspections signals in the impedance plane (flying dot), the vertica
25、l amplitude versus time (sweep), and dynamic scanner modes. 3.8.1 Impedance Plane Mode. The impedance plane mode shall display the eddy current signal as an impedance vector representing the vector sum of the test coil inductive reactance and resistance. The impedance plane mode shall be available f
26、or both manual and bolthole scanner modes. The display shall incorporate separate controls for horizontal and vertical positioning of the balance point anywhere on the screen. 3.8.2 Sweep Mode. The sweep mode shall display the vertical impedance plane component of the eddy current signal as a functi
27、on of time. The unit shall be capable of synchronizing with an external signal. 3.8.3 Dynamic Mode. The display shall have a dynamic mode that is compatible with the scanner defined in paragraph 3.10.3. The dynamic display shall automatically initiate a sweep trace at the start of each scanner probe
28、 rotation and use a waterfall type display to show consecutive sweeps or show only the current sweep while automatically erasing the previous sweep information. The full 360 degrees of rotation shall be displayed regardless of any nominal changes in rotation speed of the scanner probe. 3.9 Conductiv
29、ity and Coating Thickness Measurement. The unit shall be capable of measuring electrical conductivity and non-conductive coating thickness as specified below. The unit shall come equipped with appropriate probes and cables for conductivity and thickness measurement. The probe(s) shall be replaceable
30、 in the field without the need for depot or contractor intervention. 3.9.1 Electrical Conductivity. The unit shall be capable of measuring electrical conductivity of materials in the range from 1 to 65% IACS (International Annealed Copper Standard). The unit shall be capable of using 60 kHz for cond
31、uctivity measurement. The measurement accuracy for the range from 20 to 65% IACS shall be within + 0.5% IACS at 68 degrees Fahrenheit with liftoff up to 0.008 inches. The accuracy for the range from 1 to 65% IACS shall be within + 1.0% IACS from 32 to 100 degrees Fahrenheit. 3.9.2 Non-conductive Coa
32、ting Thickness. The unit shall be capable of measuring non-conductive coatings up to 0.025 inches thick. The measurement accuracy shall be within + 5% of the reading. 3.10 External Connections. The unit shall accommodate the following external connections. Provided by IHSNot for ResaleNo reproductio
33、n or networking permitted without license from IHS-,-,-A-A-59131A 53.10.1 Probe Interface. The selection of a probe interface that uses eddy current probes currently in the government inventory without an adapter, or can be easily adapted with minimal sensitivity losses. 3.10.2 Probe Compatibility.
34、The unit shall be electronically compatible with all currently available commercial off-the-shelf absolute, reflection, and differential-type probes. 3.10.3 Scanner Interface. The unit shall interface and be compatible with bolthole scanners. As a minimum, the eddy current unit shall provide the fol
35、lowing: (1) scanner power, (2) sweep coordination (external triggering), (3) control of scanner probe revolutions per minute (RPM), (4) compatibility with remote null switching on the scanner, and (5) capability to change probes in the field. The scanner control capability shall be included with the
36、 unit and be ready for use. Types II and IV shall include a high-speed bolthole scanner in the kit. 3.10.4 Analog Output. The unit shall have analog outputs to allow for horizontal and vertical component test signal monitoring. 3.10.5 Computer Interface. The unit shall include Microsoft Windows 2000
37、 (or latest release) compatible software and cables to enable communication with a personal computer. Software capabilities shall include (1) software version updates, (2) uploading and downloading instrument program settings, and (3) data reporting utilities such as downloading screen captures. 3.1
38、0.6 Printer Output. The unit shall be capable of printing screen presentations and test procedures. This may be accomplished either directly to a printer or through a Microsoft Windows compatible computer, with supplied software. The unit shall come with drivers for common commercially available pri
39、nters, including the Hewlet-Packard Laserjet series. 3.11 Accessories. 3.11.1 Protective Carry Cases. The unit shall include soft-shell and hard-shell carrying cases. The soft shell case shall protect the unit from damage during use while still allowing access to all external connections. The hard-s
40、hell case shall be suitable for storing and shipping the unit with accessories. If the hard-shell case with unit and accessories weighs in excess of 25 pounds, the hard shell case shall include rollers and collapsible handle typically found on luggage. 3.11.2 Cables. All types shall have a cable to
41、connect absolute “Microdot” type probes to the unit. Types III and IV shall include a dual BNC adapter cable. 3.11.3 Probes. The unit shall have a conductivity/coating thickness probe to meet the requirements of paragraph 3.9. Probe diameter shall not exceed one-half (0.5) inch. 3.11.4 Auxiliary Bat
42、tery Pack. An auxiliary battery pack shall be provided which utilizes either “AA” or “D” cell batteries if not used as the primary battery. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59131A 63.12 Environmental Conditions. The unit shall be o
43、perable in the following environmental conditions. 3.12.1 Explosive Atmospheres. The unit shall be tested and certified by a reputable laboratory for safe use, while operating on batteries, in an explosive atmosphere as defined by Class 1, Division 2, Group D, in the National Fire Protection Associa
44、tion code (NFPA 70E), Section 500. The testing method shall be in accordance with MIL-STD-810, Method 511.4, Procedure I. 3.12.2 Operating Conditions. The unit and accessories shall perform to the specification in this CID throughout temperatures from 15 to 120 degrees Fahrenheit at 95% relative hum
45、idity and from sea level to 7280 feet above sea level. 3.12.3 Storage Conditions. The unit and accessories shall perform to the specifications in this CID following a seven (7) day exposure to temperatures from 0 to 140 degrees Fahrenheit at 95% relative humidity. 3.13 Calibration. The unit shall be
46、 user calibrated without the need for manufacturers periodic calibration. No factory recalibration decals shall be applied to the unit. 3.14 Software Revisions. Software revisions shall be user installable from a Microsoft Windows 2000 (or latest release) based personal computer. All software revisi
47、ons made during the life of the contract shall be included at no additional charge. 3.15 Documentation. One copy of the commercial operation and maintenance instructions, including calibration procedures and adjustments, as applicable, shall be shipped with each item. Two paper and two electronic co
48、pies of the operation and maintenance instructions (above), illustrated parts breakdown, diagnostics, and servicing instructions, shall be sent to the Contracting Officer for delivery to the Equipment Specialist and cognizant Engineer. The documentation shall be releasable for third-party repairs af
49、ter expiration of the contract. 3.16 Warranty. A one-year warranty, to include parts, labor, and two-way shipping, shall be included against manufacturing defects. 3.17 Options. A listing of available accessory items (including bolthole scanners), extended warranties, and standard repairs shall be provided to the Contracting Officer. 4. Regulatory Requirements. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, i
