Thermo Scientific 1300 Series, User Manual

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1300 Series A2 1-3 Thermo Scientific
Section 1
Description
Digital Airflow Verification (DAVe)
Independent monitoring of inflow and downflow air velocities
guarantees that product and personnel protection remain
uncompromised. Airflow monitoring determines the velocity of the
airflow in the sample chamber as well as the inflow velocity of air
through the exhaust opening. As soon as airflow velocities rise above or
fall below a specified safety value, an audible and a visual alarm is
activated.
Window position monitoring
The position sensors detect the size of the front window opening and
indicate whether the window is open to the specified work position,
closed (energy saving) or in an unsafe intermediate position.
Thermo Performance Factor
The Thermo Performance Factor (PER) is a value that indicates the
safety status of the cabinet. This value is calculated from data
determined by HEPA filter loading, airflow status and values captured
during certification. This data is entered into a parameter list of the
control software and interconnected. The result is indicated on the
display by LEDs.
On certification by qualified personnel with a new HEPA filter, the
performance factor of the unit is indicated by green-green LEDs. As the
unit ages with use, the colors change. Red-red is unacceptable and the
unit should not be used. Any questions as to the safety of the unit
should be resolved before use.
Safety Systems
(continued)