15
15
SECTION 4
Normal Operation
Power Up Sequence
On power up, the digital display is initialized and every segment of the
display turned on for two seconds. All three of the LEDs and the horn
are also activated.
After the two seconds has expired, the three LEDs and the horn will
turn off. The version number of the firmware will then be displayed for
two seconds.
Run Mode
An electronic bargraph travels horizontally through universally
recognized red (danger), yellow (caution) and green (safe) colored
zones as the flow velocity changes. Corresponding large colored LEDs
also illuminate.
The green LED indicates a normal airflow condition. The yellow LED)
indicates that the airflow is within the caution zone between normal
and low alarm. The red LED indicates an airflow alarm.
These Good, Caution, and Alarm zones are determined by a user
programmed low alarm set point and set point offset. If the digits are
enabled, the digital display shows the air flow velocity measurement
either feet per minute (fpm) or meters per second (m/s). Over range
measurements are shown as Hi. Under range measurements are shown
as Lo.
