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FAQs FAQ: Performance & Specifications Performance and specifications 1. What are the AABB, ANRC, FDA criteria that apply to your blood bank, plasma, and red cell freezers? 2. When should I consider purchasing a CO2 or LN2 backup system? 3. Can I run any equipment on the inside of my freezer? 4. In what room temperature range will the ULT freezer work? 5. Are your products UL listed? 6. Do you offer Certificates of Calibration? 7. On my CO2 incubator, which is better, an infrared or a thermal sensor? Why? 8. Can I use the inventory racks from my old brand of freezer in my new Harris or Puffer Hubbard unit? 9. Where can I find the weight and dimensions for product with and without ship information? 10. How long can I expect the unit to last? 11. How can I get a spec sheet for your product? 12. Do the two compressors on my -85°C ultra low work together, or is one a backup? 13. What will my plug look like? 14. What is the voltage of my unit, and what are its electrical requirements? 1. What are the AABB, ANRC, FDA criteria that apply to your blood bank, plasma, and red cell freezers?
- Updated: January 27, 2000
2. When should I consider purchasing a CO2 or LN2 backup system? Anytime critical samples are being stored between -40°C and -150°C, a backup system should be considered. The typical temperature range for CO2 is -40°C to -75°C, while liquid nitrogen is used as a back-up for temperature lower than -75°C. In the event of a power outage, system failure, or other unforseen situation, a backup system will provide the necessary means to maintain the ultra-low temperatures within the freezer. (This system does require a customer supplied CO2 supply.) The backup system operates off a continuously recharged battery. Typical battery life, once the system is activated, is between 50-70 hours at -70°C.
- Updated: January 27, 2000
3. Can I run any equipment on the inside of my freezer? Yes, if heat output is not excessive (ie. ~100W in a -80°C product). For example any lights, motors, or mechanical actions may load the refrigeration system beyond it's capability to maintain the rated temperature. Puffer Hubbard Chromatography refrigerators are designed with reserve capacity for equipment. Individual units may vary depending on specific cabinet features, product loading and operating conditions. Please call Technical Support at 800-438-4851 or 828-658-2576 for the reserve capacity specific to your unit.
- Updated: January 27, 2000
4. In what room temperature range will the ULT freezer work? The equipment is designed for use in a room temperature range of 59°F-90°F, 15°C-32°C. Use outside this range can reduce freezer performance, increase power consumption, and may reduce the freezer life. It is also important to allow a minimum of six (6) inches clearance at all sides, front to back and side to side as well as at the top, for proper ventilation.
- Updated: January 27, 2000
5. Are your products UL listed? In most cases our models are UL listed, and all of our products are built to UL standards. For information on specific models, please contact us at 800-221-4201 or 828-658-4455.
- Updated: January 27, 2000
6. Do you offer Certificates of Calibration? A Certificate of Calibration provides the actual unit display and center air temperature readings along with ambient temperature at test and our GSLE Instrument Serial Number. A request for Certificate of Calibration at time of order must be entered as a line item on the PO. It is Part No. 6916-2. If you need a Certificate after unit has been shipped, order Part No. 6916-7 from the Harris Sales Department at 800-221-4201 or 828-645-4455. In both cases, you will need to specify the model number and include a serial number if possible. There is a nominal fee for both. *Note: We cannot provide a Certificate of Calibration for units beyond 1 year of the manufactured date, nor do we provide certificates for explosion proof or flammable storage units.
- Updated: February 2, 2000
7. On my CO2 incubator, which is better, an infrared or a thermal sensor? Why? Both systems use a sensor assembly positioned above the interior chamber. A small blower moves interior air gently across the sensor to compare actual CO2% against setpoint. Infrared is best if you will be changing the temperature regularly; it is less sensitive to humidity. The thermal sensor is good for constant temperature settings. This patented humidity-compensated sensor prevents drift due to temperature and humidity changes when the door is opened.
- Updated: January 27, 2000
8. Can I use the inventory racks from my old brand of freezer in my new Harris or Puffer Hubbard unit? Although the space utilization may not be optimal as provided with GSLE racks, old racks may be suitable. Measure the old racks and compare the size with the new freezer's interior dimensions found in the spec sheet or product literature. Also note that some shelves are adjustable.
- Updated: January 27, 2000
9. Where can I find the weight and dimensions for product with and without ship information? The product literature and information provided in the Catalog section of this Web site provide interior and exterior dimensions, as well as weight for UNCRATED, domestic shipments. This information can be easily converted for international shipments by using the following conversions: lbs. x .4536 = kg; in. x 2.54 = cm. Due to periodic changes in packaging, please contact our Customer Service Department at for the most recent CRATED weights and dimensions for domestic and international shipments.
- Updated: January 27, 2000
10. How long can I expect the unit to last? Typical design life ranges from ten to twenty (10-20) years, depending on operating conditions (excessively warm ambient temperatures, clogged condensers, etc.), preventive maintenance and application among a number of other variables. GSLE has been manufacturing units since 1938.
- Updated: January 27, 2000
11. How can I get a spec sheet for your product? Product specifications are available in our printed literature and also at our Catalog section of this Web site. If you are unable to find what you need, please call your authorized GSLE sales representative or dealer organization.
- Updated: January 27, 2000
12. Do the two compressors on my -85°C ultra low work together, or is one a backup? The compressors work together in a two stage system on Harris -85°C chest and upright freezers and can not operate independently.
- Updated: February 1, 2000
13. What will my plug look like? Line Cord Plug Reference Charts are available in the product literature as well as in the electical information page of this Web site.
- Updated: January 27, 2000
14. What is the voltage of my unit, and what are its electrical requirements? Product specifications and electrical requirements are listed on the product catalog and on the appropriate catalog page of this Web site.
- Updated: January 27, 2000
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