1、 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. METRIC A-A-59777A 8 January 2009 SUPERSEDING A-A-59777 7 July 2006 COMMERCIAL ITEM DESCRIPTION DRY FILTER UNIT The General Services Administration has authorized the use of this commercial item description, for all fe
2、deral agencies. 1. SCOPE. 1.1 Scope. This commercial item description covers a Dry Filter Unit (DFU). The DFU is an ambient air sampler that can be used to collect airborne biological particles. Those particles may be transferred to a liquid medium, and analyzed for the presence of possible biologic
3、al warfare agents. The DFU is available in two types or configurations. The Type I DFU (also known as DFU-1000) is intended for use in most environmental conditions. The Type II DFU (also known as DFU-2000) is intended for use in nearly all environments. It is better suited for operation in special
4、environments in which air is laden with precipitation, sand, or debris. Both DFU sampler types may operate indoors or outdoors in military and non-military applications. AMSC N/A FSC 6665 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any other data which may im
5、prove this document should be sent to: U.S. Army Edgewood Chemical Biological Center, ATTN: AMSRD-ECB-ENA-S, E3331, 5183 Blackhawk Road, Aberdeen Proving Ground, MD 21010-5424 or emailed to APGR-EcbcSpecsTeamus.army.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without li
6、cense from IHS-,-,-A-A-59777A 2 2. CLASSIFICATION. 2.2.1 Type I DFU. Type I DFU includes a blower which draws air from above the unit through a manifold which contains removable filter cartridges. Filtered air discharged from the blower is exhausted through an outlet near the bottom of the DFU. The
7、blower, power cord, spare parts, and consumables are contained within an impact-resistant, portable case equipped with hand-turn fasteners for opening and closing. 2.2.2 Type II DFU. Type II DFU includes the same components of the Type I DFU. All Type I components are contained within a larger, weat
8、her-resistant, secondary enclosure. A stack is mounted on top of the enclosure. A special air inlet pre-separator or shroud on top of the stack is intended to prevent the entrance of precipitation, sand, and debris (e.g. leaves, insects). 3. SALIENT CHARACTERISTICS. 3.1 Operating characteristics. Un
9、less otherwise specified, the following requirements apply to both types of DFUs: 3.1.1 General operation. The DFU shall operate by passing ambient air through filters and collecting airborne particles, manual transfer of particle-laden filters to a conical tube containing phosphate buffer solution,
10、 manually shaking or centrifuging in a conical tube, and manual transfer of liquid droplets to a biological identifier (hand held assay panel). The DFU shall be capable of operating indoors and outdoors on land and aboard ships. 3.1.1 Flow rate. a. Combined air flow through two filters installed in
11、parallel in the intake manifold of the DFU shall be at least 900 liters per minute (lpm). b. Air flow through the DFU with no filters installed in the intake manifold shall be at least 1250 lpm at standard conditions or corrected to standard conditions. In this document, standard conditions are defi
12、ned as one atmosphere (sea level conditions), and a temperature of 20C (68F). 3.1.2 Filter efficiency. a. During operation, each filter shall be able to trap at least 97% of passing particles whose size is one micron or greater. b. During operation at rated flow, the filter shall not experience tear
13、s or holes when dry or wet. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59777A 3 3.1.3 Extraction efficiency. The extraction or elution process, whereby the particles containing biological material collected by the filter are transferred into
14、 the Phosphate Buffer Solution (PBS), shall have an extraction efficiency of at least 50%. 3.1.4 Continuous operation. The DFU shall be capable of continuously collecting material from air samples for at least 8 hours before replacing the collection filter(s). 3.1.5 Power consumption. The DFU shall
15、be capable of operating using 120 or 240 Volts Alternating Current (VAC) with frequency of 50 or 60 Hz supplied by commercial line power or generator input power. CONUS units are shipped with 120 VAC power cord only while OCONUS units are shipped with both 120 and 220 VAC power cords. When input vol
16、tage is 120 VAC, 60 Hz, current shall not exceed 5.0 amperes (except peak power draw shall not exceed 17 amperes during startup). 3.1.6 Noise levels. DFU operating noise levels shall not exceed 60 dB at 61 cm (2 feet) when measured with the DFU in an open-air environment void of any additional ambie
17、nt noise. 3.1.7 Weight. The Type I and II DFU shall be man portable. The maximum weight of the Type I DFU shall be 19.1 kilograms (42 pounds) and the maximum weight of the Type II DFU shall be 38.1 kilograms (84 pounds) without accessories (pre-separator shroud, stack assembly, power cord and its ba
18、g, filter cartridges). Both versions shall be capable of being operated and maintained by personnel representative of the 5thand 95thpercentile. 3.2 Interface and interoperability characteristics. This section includes a brief description of both external and internal interfaces. It also includes so
19、me component functional characteristics in relation to their surrounding parts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59777A 4 3.2.1 External power interface connections. Plug at end of cable shall be rated at 15 amps or above. Plug con
20、nector details shall be in accordance with Table I and MIL-DTL-5015 for any input AC voltage. TABLE I. Power cable/AC input interface connector and pin-out. Connector Description Reference Designator Pin-Out 3 Chassis GND 2 NEUT Connector 3-position AC Input 1 Applicable* VAC * The DFU shall be capa
21、ble of operating using 120 or 240 Volts Alternating Current (VAC) with frequency of 50 or 60 Hz supplied by commercial line power or generator input power (CONUS units shipped with 120 VAC power cord only while OCONUS units shipped with both 120 and 220 VAC power cords). 3.2.2 Internal power interfa
22、ce connections. This interface allows power input and control from the power source to the DFU. Table II defines the interface between the power cable and DFU. The DFUs connector interfaces with the power cables AC output connector. The DFUs connector has male threads and 6 pins. The cables interfac
23、ing connector has female threads and 6 sockets. Connectors shall have an Ingress Protection (IP) number of 68 (dust tight and protected against immersion). Connector enclosures shall conform to rating 6P in NEMA Standard Publication 250 and IEC 60529. The DFUs power inlet connector will have a capti
24、ve cover to be used when DFU is not in operation. TABLE II. DFU power/ interface connector and pin-out. External Connector Reference Designator Connector Description MIL-SPEC Mating MIL-SPEC DFU Connector, 6-position MIL-DTL-38999 MIL-DTL-38999 Pin # Signal I/O Signal Bus 1 120 VAC I 220 VAC POWER 2
25、 NEUT I 120 VAC POWER 3 GND I GND 4 240 VAC I NC 5 NEUT I Neutral 6 GND I NC Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59777A 5 3.2.3 Manifold, air intake. a. Air sampled from external environment is drawn through the air intake manifold by
26、 negative pressure and induced airflow generated by the blower. The air intake manifold shall be located on the top of the Type I DFU for the most representative sample. The manifold shall provide an air routing path through 2 filter cartridges installed by the operator within the manifold. b. The m
27、anifold shall mate to a fitting on case (enclosure) to form a sealed air path. The manifold shall mount vertically to a “female” bayonet-type fitting in the top of the DFU case. The manifold shall feature a “male” bayonet-type fitting to lock the manifold in place by pushing down 1.9 cm ( inch) and
28、rotating 25 degrees in either direction. c. When DFU is not is use, a captive cover shall be capable of sealing intake of manifold and preventing debris from entering manifold. 3.2.4 Filter interface. a. Filter diameter shall be 47.0 mm (1.85 inch) for interface with filter cartridge. Deviations may
29、 be allowed if it is demonstrated that no air circumvents filter. b. Each filter shall be easy to insert, remove, and secure in place using filter cartridge. 3.2.5 Filter cartridge. a. DFU kit shall contain 4 filter cartridges. Two are installed during operation. b. Construction material shall be re
30、sistant to particle accumulation and cleaning fluids. c. Each filter cartridge shall be capable of holding a single filter membrane or rubber stopper. d. Each filter cartridge shall slide horizontally into side of manifold prior to use. e. Each filter cartridge shall slide horizontally outward and b
31、e packed in the DFU case while not in use. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59777A 6 3.2.6 DFU consumables. Table III gives a brief description of each of the mission consumables. For spare part description, see 3.4.4. TABLE III. D
32、FU mission consumables Consumable Description Function and interface Conical Tube of PBS Contains Phosphate Buffer Solution (10 ml minimum) To transfer bio material particles to liquid medium. To allow mechanical agitation. Filter Pack Contains 3 filters To provide replacement filters for use during
33、 dry sample collection. Dry Filter Unit Sampling Kit Each kit contains pipet, latex gloves, whirl bags, and filter pack To provide materials necessary for dry sample collection and conversion to wet sample for analysis. Hand Held Assay (HHA) A device containing numerous inoculation strips which may
34、be wetted and optically scanned To identify the type of biological material present. 3.2.7 Internal interface characteristics for Type II DFU. The Type II DFU shall use the basic components of the Type I DFU. Type I DFU components shall be contained within a larger, weather-resistant, secondary encl
35、osure whose size is 55.9 cm wide by 42.2 cm deep by 81.3 cm high, plus or minus 0.1 cm, (22.0” wide by 16.6” deep by 32.0” high, plus or minus 0.04”) without pre-separator stack. A stack shall be mounted on top of the enclosure. A special air inlet pre-separator with shroud on top of the stack is in
36、tended to prevent the entrance of precipitation, sand, and debris (e.g. leaves, insects). Total height of Type II DFU with stack and shroud shall be 2.7 meters (9.0 feet). 3.3 Environmental characteristics. The DFU (Type I and II) shall operate and deploy without degradation under the following clim
37、atic conditions: a. Operating temperatures of -28 to 60C (-20 to 140F). b. Storage temperatures of -39 to 62C, indefinite time. c. Altitudes of up to 2.44 km (8000 ft) above sea level. d. Solar radiation. e. 5 to 95% relative humidity. Provided by IHSNot for ResaleNo reproduction or networking permi
38、tted without license from IHS-,-,-A-A-59777A 7 The Type II DFU shall be resistant to extreme external conditions such as wind, rain, snow, corrosion, sand and large dust particles. It must prevent such naturally occurring substances and other debris from restricting filter airflow. 3.4 Support and o
39、wnership characteristics. 3.4.1 Security. The Type II DFU shall be able to be secured, preventing any unauthorized movement or entry into the unit. Additionally, the filters or samples collected shall be protected from removal, tampering, or access by unauthorized personnel. 3.4.2 Safety. a. The DFU
40、 sampler shall be safe for transport, storage, assembly, operation, and disposal throughout its life cycle. It shall be capable of unrestricted air, highway, rail and marine transport worldwide. b. The DFU shall be certified by UL and shall have a UL approved marking. Consider electrical, shock and
41、fire hazards and degree of protection afforded by enclosures in various environments. 3.4.3 Reliability. Time to failure of DFU shall not be less than 2 years of calendar time or 14016 hours of continuous operation (assuming 24 operating hours per day and 80% utilization). Consumable replacement is
42、not counted as a failure. 3.4.4 Maintainability. Parts identified as spare parts shall be easily replaced. Spare parts need not be identical but shall be interchangeable in terms of form, fit and function. Performance and reliability of any spare part shall be at least as high as the one being repla
43、ced. The following parts of the DFU kit are identified as spare parts and must be available: Type I: Intake manifold Filter pack Filter cartridge Gasket/o-ring kit Cable (120 VAC) Cable (220 VAC) Dry filter unit sampling kit Provided by IHSNot for ResaleNo reproduction or networking permitted withou
44、t license from IHS-,-,-A-A-59777A 8 Type II: Outer enclosure Air inlet pre-separator and stack Intake manifold Filter pack Filter cartridge Gasket/o-ring kit Cable (120 VAC) Cable (220 VAC) Dry filter unit sampling kit 3.4.5 Markings. 3.4.5.1 Hazard warnings. If any use conditions create a health ha
45、zard potential, the equipment shall have appropriate hazard warning labels in accordance with 29 CFR 1910.1200. 3.4.5.2 Identification markings. Markings on the outside surface of DFU case shall include the name (Dry Filter Unit), model number, contract number, lot number, serial number, cage code,
46、and manufacturers name. Suggested position of labels is shown in Figure 1 and 2. FIGURE 1. Type I DFU with labels Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59777A 9 FIGURE 2. Type 2 DFU with labels Provided by IHSNot for ResaleNo reproducti
47、on or networking permitted without license from IHS-,-,-A-A-59777A 10 4. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use contaminant-free materials to the maximum extent practical. Materials at the time of disposal shall not be a Resource Conservation Recovery Act (RCRA) hazardo
48、us waste as defined in 40 CFR 261.21 - 261.24 or 40 CFR 261.33 (e) and (f). 5. PRODUCT CONFORMANCE. 5.1 Product conformance. The products provided shall meet the salient characteristics of this commercial item description, conform to the producers own drawings, specifications, standards, and quality
49、 assurance practices, and be the same product offered for sale in the commercial market. The Government reserves the right to require proof of such conformance. 5.2 Market acceptability. The DFU offered must have had the motor of the DFU sold to the Government or commercial market for at least 12 months. 5.3 Produ
