PureAire Monitoring Systems, Inc.
21
5.5 Entering the Menus
The
Air Check
O
2
monitor is supplied with main menus with sub menus to adjust mA outputs, alarm
relay settings, sensor adjustments and zero suppression for toxic and corrosive gas sensor cells.
5.5.1 Set 4-20mA loop
This main menu will permit the adjusting of the 4mA and 20mA output from the Air
Check O
2
Monitor. It also provides a function that will send an actual output between
4mA and 20 mA to test any remote control and alarm system attached to the O
2
monitor.
NOTE
:
To read the mA output, Air Check O
2
monitor must either be connected to a
remote PLC controller or SCADA system. You can also connect the Air Check O
2
monitor to a volt meter to read the mA output. Please consult PureAire for more
information.
From this main menu, pushing the joystick to the right will select the sub menu and the
digital display will scroll the following:
This is the menu at which to adjust the 4mA output being sent from the Air Check O
2
Monitor.
To change this value, push the joystick right to display the 4 mA setting. The display
will indicate a value between 0 and 255 counts. Pushing the joystick up increases the
value and pushing the joystick down decreases the value. The 4mA output being sent
from the Air Check O
2
monitor will change as the number on the digital display
changes. Press
ENTER
to accept the value.
Push the joystick to the left brings you back to the pervious Main menu. The digital
display will scroll the following:
Push the joystick down to access the next sub menu;
Set 20mA Span will scroll.
.Set 4-20mA loop..
20.9%
..Set 4mA zero…
20.9%
255
20.9%
...Set 4mA zero…..
20.9%
...Set 20mA Span…
20.9%
