NuAire NU-5710, Operation And Maintenance Manual

Page: 6 / 64

OM0249 Page 6 of 64
Rev 4 June/2020
2.0 Performance Parameters and Features
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Both the interior and exterior of the DHD are constructed of 18 to 16-gauge steel.
The interior is highly polished type 304 L 16 gage stainless steel, using crevice-free construction.
All exposed edges are deburred to insure no sharp edges.
The exterior is cold rolled 16 & 18 gauge steel finished in a powder coated polyurethane finish, which is resistant to
chemicals and easily cleaned using mild household detergents.
•
The DHD's microcomputer temperature control system has two temperature sensors located inside the chamber at the
back wall. The temperature sensors compare the values to a set point and execute a differential control algorithm that
energizes a solid-state switch, supplying power to the heaters.
•
Easily removable inner shelves and rails for sterilization.
•
Up to 16 shelves can be placed inside the chamber (4 shelves are shipped with each DHD).
•
Space-age high temperature material is used to insulate the inner chamber walls.
•
Foil heaters are directly attached to the chamber walls and the top and bottom surfaces of the inner chamber.
•
Most electronics, motors, pumps, and valves are fully accessible from the back of the unit.
•
Access to the filters and CO₂ sensor through the front of the incubator.
•
A CO
2
sample port is provided on the front panel just below the door to check the concentration of CO
2
in the chamber.
•
The CO
2
percentage is controlled by a solid-state gas infrared sensor using a single light source with dual wave length
detection, providing accurate monitoring of CO
2
.
•
Automatic recovery of the CO
2
level, after a 1 minute door opening, to 5.0 +.02/- 0.5% is in 5 minutes as average.
•
The outer door includes an internal radiant heater in order to minimize condensation on the inner glass door.
A magnetic outer door gasket helps to insure a tight seal against the cabinet.
•
The inner glass door is 3/16” tempered with smooth-ground edges and seals are tight against a silicone rubber gasket.
The door latch is cam action.
A momentary switch monitors the door position, the position being opened or closed.
•
All control electronics are protected with a circuit breaker that may trip at 110% of loading rating but will trip at 145%
of load rating in less than 2 seconds.
Should the circuit breaker open (pop-out button will appear), merely depress to reset.
•
The Incubator has factory-installed adjustable leveling legs to compensate for uneven laboratory surfaces.