Table 10-3: Bits in the Gas Diagnostic Flag
bit
hex value
decimal
Name
Function
16
0x10000
65536
CO
2
I
o
Var
Moving variation in CO
2
I
o
exceeds limits
17
0x20000
131072
H
2
O I
o
Var
Moving variation in H
2
O Io exceeds limits
18
0x40000
262144
CO
2
I
o
Ratio
CO
2
signal level too low
19
0x80000
524288
H
2
O I
o
Ratio
H
2
O signal level too low
20
0x100000
1048576
Cal Mem Err
Gas head calibration signature error
21
0x200000
2097152
Heater Control
Heater control error
22
0x400000
4194304
Diff Pressure
Differential pressure exceeds limits
10.3 EC100Configure() instruction
EC100Configure()
provides a third option, beside the
ECMon
software and
Device
Configuration Utility
, for retrieving and modifying settings.
ECMon
and
Device Configuration
Utility
are user-interactive, whereas the
EC100Configure()
instruction allows automated
control under CRBasic data logger programming.
EC100Configure()
is a processing instruction. Whether running in pipeline mode or
sequential mode, the data logger will execute the instruction from the processing task. This
functionality allows
EC100Configure()
to be placed in conditional statements. Running from
the processing task has ramifications when attempting to execute
EC100Configure()
while
other SDM instructions are executing in pipeline mode.
EC100Configure()
locks the SDM
port during the duration of its execution. If the pipelined SDM task sequencer needs to run while
the SDM is locked, it will be held off until the instruction completes. This locking will likely result in
skipped scans when reconfiguring an IRGASON.
For the IRGASON to save settings, it must go through a lengthy write-read-verify process. To
avoid saving the settings after each set command, the resulting code can be used to determine if
any settings were modified from their original value. When a change is detected, the save
settings command (command code 99) can then be sent to the IRGASON. The
DestSource
parameter variable should be set to 2718 to save the settings. The reception of this command is
acknowledged, but since it takes up to a second to complete, a successful return code does not
mean that all data were successfully written to the appropriate non-volatile memory.
The instruction syntax is:
EC100Configure
(Result, SDMAddress, ConfigCmd, DestSource)
IRGASON® Integrated CO
2
/H
2
O Open-Path Gas Analyzer and 3D Sonic Anemometer
49
Summary of Contents for IRGASON
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