Campbell IRGASON Manual descargar pdf (Pagina 43)

IRGASON Integrated CO

O Open-Path Gas Analyzer and 3D Sonic Anemometer

TABLE 10-1. Output Modes for EC100 Instruction

Output

Mode

Data

Field

Description

Units

1 Ux m/s

2 Uy m/s

3 Uz m/s

4 Sonic Temperature ºC

5 Sonic Diagnostic Flag

Density mg/m

7 H

O Density g/m

0, 1, 2,

8 Gas Diagnostic Flag

9 Air Temperature ºC

10 Air Pressure kPa

Signal Strength

nominally 0.0 ≤ strength

≤1.0

1, 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. Tables 10-2 and 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

Acoustic signal has

dropped below threshold

1 0x2 2 High Amp

High-amplitude threshold

exceeded

2 0x4 4 Tracking Tracking error

3 0x8 8 Hi 3 Axis DC

Measured speed of sound

exceeds threshold

4 0x10 16 Acquiring

Sonic is re-acquiring

signals

5 0x20 32 Cal Mem Err

Head calibration memory

signature error

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 58 59

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