TEL AFA4000/2, Installation And Operating Manual

Page: 13 / 177

AFA4000/2 Airflow Monitor / p.13
3.1.2 Display features
The airflow monitor displays the following features:
•
The digital display is a backlit, full colour high resolution graphic unit with a visual
display area of approximately 70 x 52 mm. The display operates through the software
allowing the generation of figures, words and icons. You can choose either blue or
black for the background colour of the display.
•
Using the alarm keypad, you can configure the display to show the fume cupboard
velocity in
m/sec or fpm . Alternatively, you can configure the display to show AIR
FAIL / AIR SAFE continuously.
The colour of the velocity on the display screen changes when in an alarm condition, to
the following:
•
Air Safe Green
•
Low/ High Air Alarm Red
•
Warning Air Alarm Amber
An ‘event time line’ segmented into 60 x 1 minute segments scroll across the display
(when enabled). The event time line is displayed as a graphical scale ranging over 0-1.00
m/sec that progresses across the screen, representing the airflow value at each segment.
The segment colour changes, as above, if the value is in the range of an airflow alarm.
•
The alternative to the event time line is a dynamic ‘bar graph’ representing the
airflow velocity.
The display shows an up and down arrow icon, , in the bottom right hand corner of
the screen when an input function is set to
Hi / Lo (2 speed operation). The up arrow
indicates High speed and the down arrow indicates Low speed.
•
The display shows a Horn icon (with a line across it) when the audible alarm is muted.
• The display backlight dims to save energy when the following functions are in use:
•
Fan Off activated- display backlight dims until Fan On is selected.
Backlight brightens to normal level when you access the Set Up or Diagnostics
menus.