OM0133
9
4.0
Test Performance & Procedures
All equipment is thoroughly inspected at the NuAire Factory at the time of shipment. Quality control is
maintained by constant surveillance over the product, beginning at the receipt of purchased material and
concluding with a final inspection, which certifies the incubator performance to the specifications. In all instances
where product quality cannot be easily assessed on the end item, the product is inspected during sub-assembly
fabrication. The following test procedures are conducted on each cabinet and a copy of the test report is included
with each unit.
4.1 Visual
Inspection
4.1.1
Each incubator is visually inspected to insure that the interior is clean and free from scratches,
nicks, and burrs and that all welds, both interior and exterior are ground and polished smooth.
4.1.2
Painted surfaces are inspected to be free of scratches, nicks, insufficient covering, and runs.
4.1.3
The doors open and close freely without binding of the hinges. The gasket seals the inner glass
door tightly. The glass door is free of scratches.
4.2 Electrical
Tests
4.2.1
Electrical Leakage Test
All incubators are required to have primary-circuit filtering to meet EMC electromagnetic
compatibility regulations. Electrical leakage may exceed 0.5 milliampere provided the leakage
current does not exceed 1.0 milliamperes.
4.2.2
Dielectric Voltage - Withstand
1770 volts VDC ONLY is applied between dead metal parts and the hot/neutral power source
lead with no electrical breakdown using an Associated Research Model 4045AI or 3560D for 115
VAC units. 2100 volts VDC ONLY is applied for 230 VAC units.
4.2.3 Grounding
Continuity
The resistance between the green bonding conductor of the supply cord and any dead metal part
of the cabinet shall not exceed 0.10 ohms.
4.3 Functional
Tests
The following functional tests are performed on every unit at the end of a continuous 48-hour burn-in
period.
4.3.1 Control
Systems
All diagnostic functions are exercised to insure proper operation of control systems, components
and alarms.
4.3.2 CO
2
Control
Each unit is calibrated to function at a 5% CO
2
level. The concentration is checked with an
independent instrument. Each unit is monitored during the 48-hour burn-in period and only
accepted with zero failures.
4.3.3 CO
2
Recovery
Each unit is exercised for CO
2
recovery time at the end of the 48-hour burn in period. The door is
opened for 1 minute to deplete the CO
2
. After the door is closed, the unit shall recover to 5%
+0.2% within a 4-minute period.
4.3.4 Temperature
Each unit is monitored for stable temperature control over the 48-hour burn-in period 37
C.
4.3.5 Humidity
Each unit is subjected to the highest achievable RH during the 48-hour burn-in period and any
condensation problems corrected. Door and perimeter duty cycles are set at 40% and 45%
respectively for this test. These are the default settings from the factory.
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