DOCUMENT NO: M40 ISSUE NO: 3 ISSUE DATE: 11/07/18
12
CALIBRATION
(SHOULD ONLY BE UNDERTAKEN BY A SUITABLY QUALIFIED PERSON)
1.
Remove the outer front fascia panel by removing the four Allen screws.
2.
Open the hinged acrylic front window.
3.
Hinge down the upper baffle by unscrewing and removing the two thumbscrews at
the front.
4.
Switch on the fume cupboard and cover approximately two thirds of the pre-filter
area at the top inside of the enclosure with a suitable piece of paper or card.
5.
If the red warning light comes on, rotate pressure switch adjuster screw (see photo)
anticlockwise until it goes out, then slowly rotate it clockwise until the red warning
light just comes on.
If the red waning light doesn’t come on, rotate the adjuster screw clockwise until
the light just comes on.
6.
Remove paper or card and check that the light goes out. Repeat steps 4 and 5
until this is achieved.
7.
Switch off the fume cupboard and remove the paper/card covering the pre-filter.
8.
Raise the hinged baffle, refit the thumbscrews, and fold down the front window.
9.
Refit the front fascia panel.
