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Diagnostic Functions
The Diagnostic Functions provide the user with a method by which the functionality
of the monitor system can be established by manually reading input status and
manipulating outputs. Once activated, Diagnostic Functions will cause all calculation
and alarming activities to halt. If left performing Diagnostic Functions for more that
fifteen minutes, the monitor will exit Diagnostic Functions and return to normal
operation and HOME. Below is a brief description of the Diagnostic Functions.
Test Analog Inputs
When in this mode, the user will be able to view the Transducer Input Current (mA),
the Transducer Enclosure Temperature Sensor Resistance (ohms), and the Outdoor
Air Temperature Sensor resistance (ohms).
Test Digital Input
When this mode is indexed, the user can view the status of the digital input contact
as OPEN or CLOSED.
Test Analog Output #1
When indexed this function will cause the 4-20mA Output (CFM OUT) to step from 4
ma, to 12 mA, to 20 mA, and repeat successively in 3-second intervals.
Test Analog Output #2
When indexed this function will cause the 4-20mA Output (TEMP OUT) to step from
4 ma, to 12 mA, to 20 mA, and repeat successively in 3 second intervals.
Test Contact Output
-
When activated this function will cause the Alarm Contacts to toggle successively
from energized to de-energized every five seconds.
Test Zero Valve
Five seconds after indexing this function, the Auto-Zero Valve shall energize for ten
seconds and the display will show the uncorrected pressure from the transducer.
After five seconds more this sequence will repeat. The most current value of offset
pressure will also be displayed for informational purposes.
Check Registers
This function allows you to index through all of the registers in sequential order.
