Campbell-scientific CPEC200 Closed-Path Eddy-Covariance System Uživatelský manuál stáhnout pdf (Strana 86)

Appendix C. Output Variables

TABLE C-4. Values stored in table message_log

Compile

Switch

Variable

Name

Units

Description

valve_number

Valve number (0 to 6);

determines which zero/span

valve is selected

press_offset

kPa

Sample cell pressure measured

with no flow; used to infer valve

flow

valveTctl_ON

Boolean flag: True if valve

module temperature control is

enabled

valve_flow

LPM

Zero/span flow

valve_tmpr

ºC

Temperature of the valve

module

V, S

scrub_tmpr

ºC

Temperature of the scrub

module

V, S

scrub_press

kPa

Pressure measured at the scrub

pump outlet

buff_depth

Number of scans in the pipeline

buffer that have not yet been

processed (a copy of BuffDepth

from the Status table)

config_history

The user may change the configuration of the CPEC200 program at any time,

as discussed in Section 5.4, Configure the Program. All the configuration

variables and compile switches are written to the config_history table at

startup, when a configuration variable is changed, and once a day at 15 minutes

past midnight. This provides a historical record to be used as a troubleshooting

aid.

The values stored in table config_history are shown in TABLE C-5.

TABLE C-5. Values stored in table config_history

Variable Name

Units

Description

TIMESTAMP

Date and time the record was written

RECORD

record number

BATT_LOWLIMIT

CPEC200 will power down if supply voltage falls below this limit

BATT_DEADBAND

CPEC200 will power up if supply voltage rises this much above

the lower limit

SONIC_AZIMUTH

degrees

Angle between true north and the direction the CSAT3A is

pointing

BANDWIDTH

EC100 digital filter bandwidth

AMB_PRESS_NOMINAL

kPa

Nominal ambient pressure for CPEC200 elevation

PUMP_SETPT

LPM

Flow setpoint for sample pump speed control

CAL_INTERVAL

min

Time between automatic zero/span sequences

CAL_TIMEOFFSET

min

Time offset for starting automatic zero/span sequences

ZERO_TIME

Time to flow zero gas

SPAN_TIME

Time to flow CO

span gas

CAL_FLOW_SETPT

LPM

Flow setpoint for zero/span

C-10

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 111 112

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