Added: Apr 22, 2008 1:45 pm
MSHA IS SEEKING QUOTES FOR THE FOLLOWING:
QTY. 1 ESX-4CA PLATINOUS TEMPERATURE & HUMIDITY CHAMBER
QTY. 1 DRY AIR PURGE
QTY. 1 WATER FILTER SYSTEM FOR HUMIDITY SUPPLY
QTY. 1 HUMIDITY WATER SUPPLY TANK
QTY. 1 INNER GLASS DOOR WITH FOUR OPERATION PORTS (NO OUTER WINDOW/LIGHT)
QTY. 1 CABLE PORT, 2 DIAMETER WITH TWO FLEXIBLE SILICONE PLUGS
Below are specifications for Environmental Chamber:
1. Temperature Range: -73C to +150C
2. Humidity Range: 10 to 90%
3. Load: The test specimen dimensions vary; the chamber is used for approval testing of gas detectors used in underground mining. The largest system has included components (non-portable) that weigh up to 40lbs; heat output of specimens is not specified, but all external surfaces of tested equipment is routinely carried by, or manipulated by hand (surfaces certainly less than 40C).
4. Heating Rate: Rapid changes in temperature not needed, either up or down. Test procedures allows 1 hour between tests, which are conducted at 5 F intervals. In other words, we allow the samples to soak for 1 hour after the air temperature has stabilized.
5. Cooling Rate: See above
6. Power: 220VAC/60Hz [Single or 3-Phase OK]
7. Interior size: 27 to 32 cubic feet
8. Exterior size: Size limitations: The door to get into the lab is 93 by 84 . The lab height is ~12 feet.
9. Facilities: Water Reservoir for humidity supply (plumbed line available, but reservoir desired)
10. Test standards: Most tests are custom from Title 30 CFR Parts 22 and 27. See http://www.msha.gov/30cfr/22.0.htm and http://www.msha.gov/30cfr/27.0.htm. The standard test procedures can be found at http://www.msha.gov/TECHSUPP/ACC/StandardTestProcs/ASTP2203.pdf, http://www.msha.gov/TECHSUPP/ACC/StandardTestProcs/ASTP2228.pdf, http://www.msha.gov/TECHSUPP/ACC/StandardTestProcs/ASTP2229.pdf. The chamber will be used for custom tests of equipment recovered from mine explosions; low humidity (approximately 10%RH) may rarely be desirable.
11. Controller: Programmable
12. Window: Observation Window (or equivalent)
13. Communication: Serial (RS-232, RS485, USB, etc.) OR parallel (GPIB), OR analog outputs of temperature and humidity
13. # of Access Ports One 2 Port for electrical cords and gas tubing
14. Gloves port: One set (or equivalent)
15. Shelves: One set (see Load above)
16. Interior light: One (if necessary for visibility)
PLEASE PROVIDE QUESTIONS VIA E-MAIL BY 04/28. NO PHONE CALLS WILL BE ACCEPTED.
ITEM NUMBER PROVIDED BY ESPEC NORTH AMERICA. PLEASE QUOTE BRAND NAME OR EQUIVALENT.
