Campbell-scientific AP200 CO2/H2O Atmospheric Profile System Manual de usuario descargar pdf (Pagina 77)

Appendix C. Public Variables

Some of the variables in the AP200’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 directly by the IRGA

TAIR air temperature (defined only if N_AirTemps > 0)

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.

The public variables are listed in TABLE C-1.

TABLE C-1. Public Variables

Usage Variable Name Units Description

RecNum RN record number

TimeStamp TS date and time the record was measured

DIAG diag_AP200

AP200 diagnostic word (nonzero value indicates a

problem detected)

INFO interval_counter

number of scans since the start of this output interval (half

hour)

IRGA CO2 ppm CO

concentration measured by the IRGA

IRGA H2O ppt H

O concentration measured by the IRGA

IRGA cell_tmpr °C IRGA sample cell temperature

IRGA cell_press kPa IRGA sample cell pressure

IRGA Td_cell °C dewpoint temperature measured by the IRGA

INFO Td_ambient °C Td_cell, corrected to ambient pressure

DIAG sample_flow ml·min

-1

sample flow to the IRGA

USER STARTsequence set = to True to start the automatic valve sequence

USER STOPsequence set = to True to stop the automatic valve sequence

C-1

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 119 120

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Campbell-scientific AP200 CO2/H2O Atmospheric Profile System Manual de usuario Pagina 77