
IRGASON
®
Integrated CO
2
/H
2
O Open-Path Gas Analyzer and 3D Sonic Anemometer
TABLE 10-1. Output Modes for EC100 Instruction
Output
Mode
Data
Field
Description
Units
0, 1, 2,
1 Ux m/s
2 Uy m/s
3 Uz m/s
4 Sonic Temperature ºC
5 Sonic Diagnostic Flag
6
CO
2
Density mg/m
3
7 H
2
O Density g/m
3
8 Gas Diagnostic Flag
1, 2
9 Air Temperature ºC
10 Air Pressure kPa
11
CO
2
Signal Strength
nominally 0.0 ≤ strength
≤1.0
12
H
2
O Signal Strength
nominally 0.0 ≤ strength
≤1.0
2 13
Sample Cell Pressure
Differential
kPa
As shown in TABLE 10-1, all output modes give two diagnostic values: Sonic
Diagnostic Flag and Gas Diagnostic Flag. The values contain a bit field with
each bit representing a monitored condition. When a certain condition is
detected, the corresponding bit is set. The value remains set until the event that
caused the condition is no longer present. TABLE 10-2 and TABLE 10-3
describe the bits in the sonic diagnostic flag and the gas diagnostic flag,
respectively.
TABLE 10-2. Bits in the Sonic Diagnostic Flag
bit
hex
value
decimal
Name
Function
0 0x1 1 Low Amp Amplitude is too low
2 0x4 4 Tracking Poor signal lock
3 0x8 8 Hi 3 Axis DC
Delta temperature exceeds
limits
4 0x10 16 Acquiring
Acquiring ultrasonic
signals
5 0x20 32 Cal Mem Err
Sonic head calibration
signature error
35
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