Campbell Scientific CPEC200 Closed-Path Eddy-Covariance System - Manual (Page 83)

Appendix C. Output Variables
TABLE C-3. Values stored in table zero_ span
Compile
Switch Variable Name Units Description
V panel_tmpr_Avg ºC Average datalogger wiring panel temperature
V BattVolt_Avg V Average supply voltage
V BattVoltOK_Avg Fraction of time the system was not shut down because the
supply temperature had dropped below the limit
V slow_samples Number of samples included in the average for values
measured in the slow scan
V ValveTmprOK_Avg Fraction of time the valve module temperature was within its
operating range
V valve_tmpr_Avg ºC Average valve module temperature
V valve_heat_Avg Fraction of time the valve module heater was on
V valve_fan_Avg Fraction of time the valve module fan was on
V, S scrub_press_Avg kPa Average pressure at the scrub pump outlet
V, S ScrubTmprOK_Avg Fraction of time the scrub module temperature was within its
operating range
V, S scrub_tmpr_Avg ºC Average scrub module temperature
V, S scrub_heat_Avg Fraction of time the scrub module heater was on
V, S scrub_fan_Avg Fraction of time the scrub module fan was on
message_log
The message_log table stores a record that includes a text message as well as
several variables that describe the state of the system when the record is
written. It notifies the user of a significant event, such as a change to a
configuration variable or events related to a zero/span sequence.
Public variable latest_note shows the latest message written to the
message_log table. After one minute the text in latest_note is marked as old,
but is still displayed.
Some of the messages relate to the system configuration variables. The first
message, written when the program starts up, will be either:
• Using configuration variables from sys_conf_var.dat
or:
• Using default configuration variables
This is normally followed by:
• System configuration saved
This message is also written any time the configuration is saved: once per day
at 15 minutes past midnight and any time a configuration variable is changed.
Most of the messages are related to the Zero/Span sequence. When the
sequence starts and stops normally, the following messages are displayed.
• Zero/Span sequence started
• Zero/Span sequence completed
C-7