MODIFICATION
66 -- Environmental Chamber for a Diffractometer
- Notice Date
- 3/3/2010
- Notice Type
- Modification/Amendment
- NAICS
- 334519
— Other Measuring and Controlling Device Manufacturing
- Contracting Office
- Department of Commerce, National Institute of Standards and Technology (NIST), Acquisition Management Division, 100 Bureau Drive, Building 301, Room B129, Mail Stop 1640, Gaithersburg, Maryland, 20899-1640
- ZIP Code
- 20899-1640
- Solicitation Number
- SB1341-10-RQ-0083
- Archive Date
- 3/25/2010
- Point of Contact
- Joni L Laster, Phone: 301-975-8397, Carol A. Wood, Phone: 301-975-8172
- E-Mail Address
-
joni.laster@nist.gov, carol.wood@nist.gov
(joni.laster@nist.gov, carol.wood@nist.gov)
- Small Business Set-Aside
- Total Small Business
- Description
- The purpose of this amendment is to respond to technical questions submitted, incorporate technical changes, and extend the due date for quotations. 1. The following questions and responses are hereby provided. Question 1) What is the air flow requirement of the chamber exhaust/cooling fan --or-- what is the estimated heat dissipation from the Diffractometer? Answer: The chamber exhaust/cooling fan must be capable of moving at least 100 cubic feet of air per minute. Question 2) What is your anticipated temperature control tolerance (+) of the chamber exhaust air? Specification states the temperature controller/monitor needs to have a 0.05C sensitivity, is 0.05C your control tolerance? Answer: It is required that the temperature stability of the chamber will be ten times better than the temperature stability of the laboratory; e.g., if the laboratory temperature varies by 2.5°C in a one hour period, the chamber temperature must vary by 0.25°C or less over the same period. There is no humidity control specification for the system. The final operating temperature of the chamber must be between 20°C and 25°C. Please reference changes to specification 3 below. Question 3) Can you clarify the requirement "20' of cable tray hung from the ceiling"? a. If the chamber is less than 12' long, are there two rows of cable tray? (What is the layout) b. Are they mounted directly to the ceiling or are they to hang down to certain height? c. Is this "tray" standard removable cover wireway, or hinged door type wireway, or just an open channel...any special requirement or size? Answer: The cable tray shall be two lengths each 10' long. The cable tray shall be suspended from the ceiling by rods or cables so that the cable tray is at least 6'6" but not more than 6'10" from the floor. The cable tray shall be of open channel type. Please reference changes to specification 6 below. The Contractor shall specify the proposed type, materials and construction of the channel. Question 4) Do you have a stock/manufacturer number in mind? Answer: No Question 5) What temperature range? Answer: Refer to answers to questions 7 and 8 herein Question 6) Any humidity required? Answer: No Question 7) Lowest temperature? Answer: The lowest temperature the chamber shall reach is 20°C. Please see changes to specification 3 below. Question 8) Highest temperature? Answer: The highest temperature the chamber shall reach is 25°C. Please see changes to specification 3 below. Question 9) Are you doing steady state testing or ramping up and down ( if so how fast)? Answer: No, Does not apply Question 10) What is the chamber to be used for? Answer: Please read the required specifications, this is addressed Question 11) What are the desired temperature range and/or set-points? Answer: Please see changes to specification 3 below Question 12) Is humidity control required? Answer: Please read the required specifications, this is addressed Question 13) If humidity is controlled, what are the desired humidity range/set-points -and at what temperature(s)? Answer: Please read the required specifications, this is addressed Question 14) What range of control of these variables is required? (Tight or critical control?) Answer: Please read the required specifications, this is addressed Question 15) Are there uniformity requirements, or an operational standard the chamber must comply with? Answer: Please read the required specifications, this is addressed Question 16) What storage capacity (what size of chamber) are you looking for? Answer: Please read the required specifications, this is addressed Question 17) Is there a significant heat (or other) load to consider, or chemical or electrical reaction that will be taking place within the chamber? Any running machinery? Batteries or Aerosols? Answer: Please read the required specifications, this is addressed Question: 18) If live specimens will be placed in the chamber, please specify the type, so that screening, venting, decontamination, noise-proofing, and corrosion-proofing options may be addressed. For insect-rearing and plant growth, please allow us to quote lighting and humidity options designed to meet your specific requirement. Answer: This is not relevant to the Government's requirement Question 19) Where is the chamber to be delivered and installed, geographically? Answer: Please read the required specifications, this is addressed Question 20) Will the chamber itself be located within a controlled environment, such as a lab or office space? Are there any space constraints that we should consider? Answer: Please read the required specifications, this is addressed Question 21) When is the chamber needed? Are there any time constraints we should be aware of? Answer: Please read the required specifications, this is addressed Question 22) How many doors are preferred? How many shelves? Answer: Please read the required specifications, this is addressed Question 23) Please note that models with all stainless steel construction are recommended for highly corrosive and high humidity applications. Answer: This is the Contractor's determination Question 24) Will there be a clean water line/compressed air line available to the chamber? Answer: Yes, water and air will be available Question 25) Please state your voltage requirements, if known, or different from the standard 115/120V. Plugs provided are standard household NEMA 5-15 type. Answer: Please read the required specifications, this is addressed Question 26) Are you interested in adding any logging or monitoring equipment to the control system, such as a chart recorder? Answer: Please read the required specifications, this is addressed Question 27) Regarding freezers-Is this for stability storage? Or will a slight defrost tolerance be acceptable? Answer: Not a freezer, does not apply to this equipment Question 28) If ramping or cycling capability is requested-Please let us know your test or cure regimen, as well as initial loading statistics (mass, composition, weight, temperature, etc.), so that we may offer optimal settings and confirm performance as required. Answer: No ramping required Question 29) How many chambers are you planning to purchase? Answer: Please read the required specifications, this is addressed 2. Line Item 0001 is hereby amended to incorporate changes to the technical specifications as follows: 2.1 Specification 3 is hereby amended as follows: FROM: 3. Temperature Control: The temperature inside the chamber shall be controlled by drawing the main lab air through the chamber using a circulation exhaust fan. The operating temperature of the chamber shall be dependent on the temperature of the air in the main lab, the heat generated by the diffractometer, and how much air is drawn through the chamber. The Contractor shall provide a method whereby the temperature of the chamber can actively be controlled by monitoring the temperature of the exhaust air and controlling the speed of the fan. The sensitivity of the temperature monitor shall be ±0.05°C or better. Preference will be given to greater sensitivity. The temperature controlling system shall be software controlled and shall be able to provide a record of the chamber temperature which shall be available by direct data transfer to a computer through a COM port or USB port. The software shall be off-the-shelf software that shall record automatically, every minute, and directly download. The temperature controlling system provided shall work with a personal computer running Windows XP. The Contractor shall provide the necessary cable. It must be possible to disable the active temperature control and directly control the speed of the fan using the software control. A personal computer is not required to be provided as part of the temperature control system. The Government will provide a personal computer with the serial parallel and USB ports. TO: 3. Temperature Control: The temperature inside the chamber shall be controlled by drawing the main lab air through the chamber using a circulation exhaust fan. The operating temperature of the chamber shall be dependent on the temperature of the air in the main lab, the heat generated by the diffractometer, and how much air is drawn through the chamber. The heat generated by the diffractometer cannot be accurately assessed because the x-ray tubes, which are the main source of heat, are water cooled so much of the heat generated by them is removed from the chamber by the chilled water line. The temperature of the chamber shall be actively controlled by monitoring the temperature of the exhaust air and controlling the speed of the fan. The sensitivity of the temperature monitor shall be ±0.05°C or better. Preference will be given to greater sensitivity. The temperature of the laboratory at a single position near the chamber can be monitored. It is required that the temperature stability of the chamber will be ten times better than the temperature stability of the laboratory; e.g., if the laboratory temperature varies by 2.5°C in a one hour period, the chamber temperature must vary by 0.25°C or less over the same period. There is no humidity control specification for the system. The final operating temperature of the chamber must be between 20°C and 25°C The temperature controlling system shall be software controlled and shall be able to provide a record of the chamber temperature and the laboratory temperature which shall be available by direct data transfer to a computer through a COM port or USB port. The software shall be off-the-shelf software that shall record automatically, every minute, and directly download. The temperature controlling system provided shall work with a personal computer running Windows XP. The Contractor shall provide the necessary cable. It must be possible to disable the active temperature control and directly control the speed of the fan using the software control. A personal computer is not required to be provided as part of the temperature control system. The Government will provide a personal computer with the serial parallel and USB ports. 2.2 Specification 4 is hereby amended as follows: FROM: 4. Air Handling: The chamber shall have one (1) ball bearing exhaust fan mounted centrally on top of the chamber connected to one or more exhaust port holes in ceiling of the chamber. The fan shall not generate more than 55 dB of noise. The fan shall draw air through the chamber from four intake grilles located within 1 foot of the floor. The grilles shall have an area of 0.5 to 1 sq ft. Two of the grilles shall be located on the front wall of the chamber (side with door) and two of the grilles will be located on the opposite wall. All grilles shall have adjustable air intake louvers adjustable from the inside of the chamber. TO: 4. Air Handling: The chamber shall have one (1) ball bearing exhaust fan mounted centrally on top of the chamber connected to one or more exhaust port holes in ceiling of the chamber. The chamber exhaust/cooling fan must be capable of moving at least 100 cubic feet of air per minute through the chamber. The fan shall not generate more than 55 dB of noise. The fan shall draw air through the chamber from four intake grilles located within 1 foot of the floor. The grilles shall have an area of 0.5 to 1 sq ft. Two of the grilles must be located on the front wall of the chamber (side with door) and two of the grilles must be located on the opposite wall. All grilles shall have adjustable air intake louvers adjustable from the inside of the chamber. 2.3 Specification 6 is herby amended as follows: FROM: 6. Cable feed through and interior cable trays. The Chamber shall have all of the following: (a) Three (3) 2" and one (1) 3" (inside diameter) PVC sleeved port holes through side walls; (b) Approximately 20' of cable tray hung from the ceiling. TO: 6. Cable feed through and interior cable trays. The Chamber shall have all of the following: (a) Three (3) 2" and one (1) 3" (inside diameter) PVC sleeved port holes through side walls; (b) 20' of cable tray hung from the ceiling. The cable tray shall be two lengths each 10' long. It shall be suspended from the ceiling by rods or cables so that it is at least 6'6" but not more than 6'10" from the floor. It shall be of open channel type. The proposed type, materials and construction of the channel shall be specified. 3. The required submissions are hereby amended to add the following requirement to Paragraph 1 which reads "For the purpose of evaluation of Technical Capability, quoters shall submit all of the following:" ADD: "e. The Contractor shall specify the proposed type, materials and construction of the channel." 4. The due date for quotations is hereby extended as follows: FROM: March 5, 2010 at 3:30 PM Eastern Time TO: March 10, 2010 at 3:30 PM Eastern Time
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/DOC/NIST/AcAsD/SB1341-10-RQ-0083/listing.html)
- Place of Performance
- Address: 100 Bureau Drive, Gaithersburg, Maryland, 20899, United States
- Zip Code: 20899
- Zip Code: 20899
- Record
- SN02081998-W 20100305/100303235020-4dc90a012dc18231ee050a2b59996e84 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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