SM-BioIIAdvancePlus-EN-1812
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9.
Place the anemometer at 270mm high of the shelves, over each point (take all readings
with the anemometer in the same direction and without covering any hole).
10.
Take all the reading velocity needed and enter the average velocity.
11.
Once again, take 5 exhaust readings, calculate and enter the new average inflow
velocity.
12.
Enter the new average impulsion velocity measured in the same condition as points 8
and 9.
13.
Entering the previous value the cabinet is adjusted to work at laminar down flow velocity
defined in the set points. The display shows you the values of extraction flow, laminar
down flow & inflow.
The only way we can change the inlet air velocity is through the extraction regulators
(see figures in point nº2). Opening, we increase the inlet air velocity and closing we
decrease de inlet air velocity.
IMPORTANT: IF WE CHANGE THE OPENING OF THE EXTRACTION REGULATOR,
WE WILL HAVE TO RECALIBRATE THE CABINET FROM THE POINT 5
14.
Advance 3 & 4
: If inlet air velocity is between 0.55 m/s and 0.66 m/s, the cabinet is
alright calibrated.
If the inlet air velocity is smaller than 0.55 m/s we need to increase the incoming air
speed, we will open the extraction regulator and recalibrate the cabinet from the point 5.
If the inlet air velocity is bigger than 0.66 m/s we need to decrease the incoming air
speed, we will close the extraction regulator and recalibrate the cabinet from the point 5.
Advance 6
: If inlet air velocity is between 0.50 m/s and 0.60 m/s, the cabinet is alright
calibrated.
If the inlet air velocity is smaller than 0.50 m/s we need to increase the incoming air
speed, we will open the extraction regulator and recalibrate the cabinet from the point 5.
If the inlet air velocity is bigger than 0.60 m/s we need to decrease the incoming air
speed, we will close the extraction regulator and recalibrate the cabinet from the point 5.
If the cabinet is alright calibrated we can switch it off.
15.
After calibrating the cabinet we have to check that it works correctly. Switch on the
cabinet (the front glass should be in the working position). Go to the technical service
menu where air velocities appear. Wait at least 5 minutes.
16.
Take 5 extraction air velocity values. The extraction average value of the 5 velocity
readings should be the same as shown in the display ± 0.05 m/s that is the measuring
error of the unidirectional anemometer.
V
exhaust display
± 0.05 m/s = V
average exhaust
17.
Measure the impulsion air speed (take the values in the same points as calibration
mode). The average impulsion speed should be between 0.34 m/s and 0.36 m/s.
0.34≤V
average impulsion speed
≤0.36
ACCEPTANCE CRITERIA
The cabinet is calibrated if permitted extraction and impulsion speed values are satisfied
according points 16 and 17.
If conditions are not satisfied we proceed to calibrate the cabinet again from point 1.
