7.0 Quick Start Installation
Follow the instructions below for installing and commissioning the unit. :-
1. Fit the alarm to the Fume Hood using the cut-out details provided with the
unit --- see page 11 to 13
2. Plug in the power adapter to a Mains AC power socket and connect the
flying lead to the alarm unit --- see typical connection diagram on
page 15
4. Power up the unit and wait at least 30 secs while the sensor temperature
stabilises.
During this time the Red & Green LEDs will both be on ( not flashing )
If the unit has not been previously calibrated the Red & Green LEDs will
begin to flash on/off at the end of the 30 sec start up time delay but the
audible alarm will not sound.
If the alarm has been calibrated it will go into normal operation.
5.
Calibration :-
Alarm Point Capture
( Factory default )
a. Open the Sash to the normal operating height and adjust the face
velocity to the Low Air alarm value using a calibrated instrument to
check the value.
b. Press and hold the Enter button for 5 secs to go into the Calibration
mode. This is indicated by both Red and Green LEDS flashing on/off
together with the audible alarm sounding ( ‘Beep’ on/off 4 times every
1 sec ).
c. To initiate the alarm point calibration press and hold the ENTER and
the SET button at the same time. The unit will then sample the airflow
for a 5 sec period during which time the Green LED goes off and the
Red LED flashes on/off. The audible alarm continues to sound during
this period and if the sampling is successful will give a two tone beep
at the end of the period and the unit will then go automatically into the
Run mode.
If the buttons are released during the sampling period or if the airflow
is fluctuating more than the pre-set value the audible alarm will give a
lower frequency buzzing sound for a short period and then go back
into the calibration mode. If this occurs re-press the ENTER and SET
buttons to repeat the airflow sampling.
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