PureAire Monitoring Systems, Inc.
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5.5 Entering the Menus
The
CO
2
monitor is supplied with main menus with sub menus to adjust mA outputs and alarm relay
settings.
5.5.1 Set 4-20mA loop
This main menu will permit the adjusting of the 4mA and 20mA output from the
CO
2
monitor. This menu will provide the function that will send an actual output
between 4mA and 20 mA to test any remote control and alarm system attached to the
CO
2
monitor.
NOTE
:
To read the mA output, CO
2
monitor must either be connected to
a remote PLC controller or SCADA system. You can also connect the CO
2
monitor to a DC ammeter 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 CO
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 CO2 monitor will change as the number on the digital display
changes.
Push the joystick to the left to enter the value and bring 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..
..Set 4mA zero…
128
470PPM
...Set 4mA zero…..
...Set 20mA Span…
