ThermoFisher Scientific HERASAFE 2025, Operating Instructions Manual

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| Unit Description
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50161258 HERAsafe 2025
Chapter 4

Test hoses for the exhaust air unit [9] and the downflow unit [13] are under the work
plates.

Optional stands [12], adjustable in height and with fixed height.

Side slates with two sealed access openings [14]. These can be equipped with media
valves.

Internal outlets [15] for power supply of accessories.

Lighting device [16], equipped with 2 tubes, is mounted on the front window.

Workplate segments [10] with arm rests [11]. A one-piece workplate and special
work plates are available options..
Safety System
The safety system comprises a combination of protective and alarm systems that ensure
maximum personal and material protection.
Safety systems:

Vacuum-sealed air system
An air system in combination with HEPA filters for downflow and exhaust air forms
the basis of the safety system for personal and material protection.

Personal protection
Air aspired from the exterior along the entire working opening at a constant high
speed prevents that:

agents may leak through the working opening of the chamber.
As the exterior air pressure around the unit exceeds the pressure of the internal air
system, it is ensured that:

agents cannot be released to the exterior in the case of a leak in the cabinet
housing.

Product protection
A steady airflow within the air system ensures that:

a constant downflow allows the HEPA filters to remove contaminants so that the
samples are always surrounded by ultrapure air,

harmful particles are not carried over through the sample chamber (protection
from cross-contamination).
NOTE Test hoses
Do not remove the two test hoses for checking downflow and exhaust air.