-850c deep freezer with liquid co2 supply and installation of -850c deep freezer with liquid co2 , deep freezer with liquid carbon dixide , technical specifications • upright ultra-low temperature freezer • programmable operating temperature from –50 °c up to –85°c with 1°c increment • capacity – 540-570 lit or above • fully programmable microprocessor controlled with membrane keypad, eye level control panel and led disply • control panel must have battery back-up and pass word protection security for unauthorized tampering of freezer settings • automated vent port for quick re-access to samples • insulation-poly urethane foam (puf) • exterior- scratch and rust resistance powder coated steel • interior - polished stainless-steel grade 304 2b • shelves – minimum 5 nos with individual doors and tight sealing to prevent temperature loss. shelf design should promote efficient and consistent air circulation in the chamber and rounded metal rims at the shelf edges • outer door with reinforced tight sealing with locking facility. • silence level/noise level (at -80 °c)- 60.0 db or lesser • system should have battery powered back-up circuit; in case of power failure, the battery should supply power to the alarms and display for up to 72 hrs. • alarms - audible and visible alarms for temperature, power failure, system failure, battery low etc., and it also have remote alarm port for connection to an auto dialer. • refrigeration system - hfc-free, cfc-free, hcfc-free non-flammable refrigerants and green natural hc gas based refrigeration system (two stage compressor system). • freezer should have heavy duty wheels for easy shifting/movement • electrical requirement – 230 v/50 hz, 10 amps. single phase. freezer must have iso 9001 standard quality test requirements and iec 61010 electrical safety ce certified. • back up – liquidco2 backup system with connectors, controllers and4 nos of 47 lit water capacity filled liquid co2 cylinders • racks and boxes (approx.- 2 inch) for storing samples for 2 compartments. • warranty – 5 year comprehensive maintenance contract provide details of minimum 30 installation with in kerala with satisfactory certificates form customers.