52
Agilaire 8872 Manual
Chapter 2 Configuration
Validation and Flags
Flags in AirVision can generally come from the data source (data logger, instrument), or applied
later via data editing.
For data coming from data loggers (8816, 8832, or 8872), the flag list and sources of the flags
are as follows. Flags are listed below in order of priority (from the data logger’s perspective).
Some flags are ‘instantaneous’ flags applied to readings (and visible on all resultant averages),
while some flags are only applied to the particular average interval they are set for, like a high
or low limit. Flags in
red
will invalidate the readings for the period the condition exists.
FLAG TYPE
DESCRIPTION
SOURCE OF FLAG
<
Average
Insufficient data for
valid average
Automatically applied by logger if less
than 75% or defined % valid in Validation
Settings.
>
Average
Sufficient data for valid
average, but some
data missing
Automatically applied by logger if
> 75% (or user defined threshold) but
< 100% of readings valid.
P
Instantaneous
Power failure
Power failure experienced (invalidates
one base average).
D
Instantaneous
Channel Offline
Channel disabled via user interface
(Logger Toolbox in 8872).
T
Instantaneous
Out Of Control due
to bad Cal
Normally a CEM feature, if cal drift
> OOC limit set in Calibration program,
then channel invalid until a good cal is
passed.
F
Instantaneous
Boiler Offline (CEM)
Normally CEM feature, boiler is
considered offline based on status input
pattern configured in Validation settings.
B
Instantaneous Bad Instrument
Stations
Instrument is considered offline based on
configured status input pattern. Will also
appear during periods of Modbus or
RS-232 communication ‘dropouts’
between logger and instrument.
C
Instantaneous Instrument in
Calibration
Logger running calibration program affect-
ing this instrument/channel.
M
Instantaneous Instrument in
Maintenance
Channel disabled via user interface
(Logger Toolbox in 8872) or via
configured status input.
O
Instantaneous Analog Overrange
Single reading > full scale of analog
range, invalidates the base average.
