Campbell-scientific CPEC200 Closed-Path Eddy-Covariance System Manuale Utente Pagina 71
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Appendix B. Public Variables
Some of the variables in the CPEC200’s CRBasic program are included in the
Public table. These public variables may be displayed or edited with a
keyboard display or PC. Other program variables are hidden from the user to
reduce clutter in the Public table. Many of these public variables are saved in
the output tables. Some of the public variables allow the user to set the
operation of the system or to give diagnostic information. The intended usage
of the public variables is categorized as follows:
IRGA measured by the EC155 gas analyzer
SONIC measured by the CSAT3A sonic anemometer
DIAG diagnostic
USER user setting
INFO provides information on system status
INFO/USER conditional user setting (may set if the sequence is stopped)
CONFIG system configuration parameter - saved in file sys_conf_var.dat.
Most of the public variables are defined all the time, but some are dependent
on compile constants. The public variables are listed in TABLE B-1.
TABLE B-1. CPEC200 public variables
When Defined
Usage
Variable Name
Units
Description
always
TIMESTAMP
TS
Date and time the record was
measured
always
RECORD
RN
Record number
always
DIAG
latest_note
Latest note written to the
message_log table
always
DIAG
mode_status
Operating state of the
CPEC200
always
DIAG
cpec_status
Overall status of the CPEC200
always
DIAG
irga_status
Status of the EC155
always
DIAG
sonic_status
Status of the CSAT3A
always
DIAG
pump_status
Status of the sample pump
always
DIAG
valve_status
Status of the valve module
always
DIAG
EC_mode
Boolean flag: True if the pump
is on and no zero/span
sequence is running
always
DIAG
diag_cpec
CPEC200 diagnostic word
always
DIAG
irga_OK
Boolean flag: True if no
problems are detected with the
EC155
always
DIAG
sonic_OK
Boolean flag: True if no
problems are detected with the
CSAT3A
always
DIAG
pump_flow_OK
Boolean flag: True if the pump
flow is within its normal range
always
SONIC
Ux
m∙s
-1
Wind velocity X component
always
SONIC
Uy
m∙s
-1
Wind velocity Y component
always
SONIC
Uz
m∙s
-1
Wind velocity Z component
B-1
- INSTRUCTION MANUAL 1
- Limited Warranty 3
- Assistance 4
- Precautions 5
- Table of Contents 7
- Figures 9
- 1. Introduction 11
- 2. Cautionary Statements 11
- 4. Overview 12
- 3. Initial Inspection 12
- 4.1.2 Optional Components 14
- 4.1.3 Common Accessories 18
- 4.1.4 Support Software 20
- 4.1.5 Replacement Parts 21
- 4.2 Theory of Operation 23
- 4.2.3 Valve Module 24
- 4.2.4 Pump Module 26
- 5. Installation 27
- 5.1 Mounting 28
- 5.1.3 Install EC Sensors 29
- 5.2 Plumbing 31
- 5.2.2 Zero/Span 32
- 5.3 Wiring 33
- 5.3.2 EC Sensor Cables 34
- 5.3.3 Pump Module Cable 37
- 5.3.4 Apply Power 37
- 5.4 Configure the Program 38
- 5.5 Verify Proper Operation 42
- 6. Zero and Span 43
- 6.2 Automatic Zero and Span 44
- 6.3 Manual Zero and Span 45
- 7.1 Enclosure Desiccant 50
- 7.2 EC155 Intake Filter 50
- 7.3 EC155 Windows 50
- 8. Repair 51
- A.1 Overview 53
- A.2 Status Text Variables 53
- Appendix D. Control Bits 89
- Appendix E. Using Swagelok 91
- Fittings 91
- Back ferrule 93
- Front ferrule 93
- Power Adapter Kit 95
- G.1 Theory of Operation 99
- G.3 Installation 100
- G.4 Maintenance 101
- Appendix H. CPEC200 Pump 105
- Replacement 105
- H.3 Installation 108
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