Campbell-scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC1 Instrukcja Użytkownika Pobierz pdf (Strona 48)

EC155 CO

and H

O Closed-Path Gas Analyzer

TABLE 10-1. Output Modes for EC100 Instruction

Output

Mode

Data

Field

Description

Units

0, 1, 2,

m/s

2 Uy m/s

3 Uz m/s

Sonic Temperature

ºC

5 Sonic Diagnostic Flag

µmol/mol

7 H

O mmol/mol

8 Gas Diagnostic Flag

1, 2

9 Air Temperature ºC

10 Air Pressure kPa

Signal Strength

nominally 0.0 ≤ strength

≤1.0

O Signal Strength

nominally 0.0 ≤ strength

≤1.0

2 13

Sample Cell Pressure

Differential

kPa

As shown, all output modes give two diagnostic values, the Sonic Diagnostic

Flag and the 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 below

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

1 0x2 2 High Amp Amplitude is too high

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

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 69 70

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