9
A higher value is taken with the sash partially closed and this is also
‘captured’ by the alarm. From these two known points the alarm will track
the face velocity over the whole range of the hood face velocities
.
Before starting the calibration of the alarm please read the ‘Calibration
Notes ‘ below.
When you are ready to start the calibration proceed as follows :-
a.
In the Setup Menu select ‘CALIBRATION’ and press the ENTER
button
b.
At this stage you will be requested to enter the PASSWORD. Use
the +/- buttons to select the individual digits in turn and press
ENTER for each digit.
If the password is correct the unit will go to the Calibration mode. If
the password is not correct you will be requested to try again --- on
the third wrong password entry the calibration menu will lock out for
10 mins
NOTE:- If you enter the Calibration Menu by accident :-
press the + & - buttons at the same time to escape back to the
Main Menu
c.
When in the calibration mode follow the instructions on the display
screen to carry out the calibration of the unit. See ‘Calibration
Notes’ below for hints on successful calibration.
d.
When the calibration is complete the unit will return to the Main
Menu.
e.
From the Main Menu use the +/- buttons on the alarm face select ‘
RUN ’ and then press the ENTER button.
The unit will now function and display the measured Fume Hood face
velocity
Note:-
To re-enter the Menu functions press and hold the ENTER button until
the Main Menu appears on the display
