Net Radiometer (NR Lite2 or CNR4)

Configure the Moving Average, ComsTag, and LogField blocks for each variable, including Net Radiation. The NRLite2 outputs one variable. The CNR4 outputs five variables: RN is the output of the NetRad block; SWIN (shortwave incoming) is the second, SWOUT (shortwave outgoing) is the third, LWIN (longwave incoming) is the fourth, and LWOUT (longwave outgoing) is fifth.

Important: Each output from a multichannel sensor must be configured separately (see Multichannel Sensor).

Table 5‑2. Configuration for net radiometer.
  • Model: Select NR Lite2, CNR2, or CNR4
  • AIO Module: The Analog In/Out Module to which the sensor leads are connected.
  • Differential: Whether the signal is singled-ended or differential.
  • Component: Depending upon which model of sensor, choose the appropriate component.
  • AIO Channel: The AIO Channel that is reading the selected component.
  • Sensitivity: Sensitivity (slope that relates sensor output to the measured variable) of the selected component
  • Schedule: Controls when the software initializes the computation.
  • Schedule Time: An offset that specifies the time at which averaging starts.
  • Schedule Interval: How often averaging occurs.
  • Sample: Controls over the averaging period and interval.
  • Sample Interval: Time between samples.
  • Sample Duration: Duration of the averaging period.
  • Name: Used by the gas analyzer software to identify the variable type and units. See Table 4‑1 to interpret the first number and Table 4‑2 to interpret the second.
  • Prefix: Ignore this field.
  • Suffix: Ignore this field.
  • Right Digits: The number of digits to the right of the decimal (hard stop) for this variable.
  • Name: Recorded in the header of the data file. Default variable names are similar to GHG-Europe standards (see VariableID).
  • Record ID: Tells the datalogger to associate this variable with the Record ID in the LogRec block (see Custom Configurations). It should be the same in both places.
  • Sequence #: The column number in the sequence of variables.
  • Right Digits: Number of digits right of the decimal.
  • Format: The data that is output when logged data is viewed. Typically <val>.
  • Units: The units entered will override previous entries.
The Display block is used select data that gets displayed on the I2C Display. The data displayed is the last measured value for the block connected to the display block. The data is displayed at the requested precision (right digits) with the selected Label.
Units for the net radiometer are W/m2.
Select the variables in the FieldVar list.

Albedo (CNR4 only)

These blocks compute albedo (shortwave reflected / shortwave incoming) from measurements of the CNR4 Net Radiometer.

Table 5‑3. To record the albedo from CNR4 measurements.
The XY Function block (processing block) creates a function, which we use to compute Albedo. Select the x/y function. X is the shortwave upwelling measured by the the CNR4; Y is the shortwave downwelling measured by the CNR4.
  • Name: Used by the gas analyzer software to identify the variable type and units. See Table 4‑1 to interpret the first number and Table 4‑2 to interpret the second.
  • Prefix: Ignore this field.
  • Suffix: Ignore this field.
  • Right Digits: The number of digits to the right of the decimal (hard stop) for this variable.
  • Name: Recorded in the header of the data file. Default variable names are similar to GHG-Europe standards (see VariableID).
  • Record ID: Tells the datalogger to associate this variable with the Record ID in the LogRec block (see Custom Configurations). It should be the same in both places.
  • Sequence #: The column number in the sequence of variables.
  • Right Digits: Number of digits right of the decimal.
  • Format: The data that is output when logged data is viewed. Typically <val>.
  • Units: The units entered will override previous entries.
The Display block is used select data that gets displayed on the I2C Display. The data displayed is the last measured value for the block connected to the display block. The data is displayed at the requested precision (right digits) with the selected Label.

Temperature (CNR4 only)

Table 5‑4. To record temperature from the CNR4 measurements
Voltage measurement of module 2, channel 9 (white wire from CNR4).
  • Schedule: Controls when the software initializes the computation.
  • Schedule Time: An offset that specifies the time at which averaging starts.
  • Schedule Interval: How often averaging occurs.
  • Sample: Controls over the averaging period and interval.
  • Sample Interval: Time between samples.
  • Sample Duration: Duration of the averaging period.
Uses “CNR4Thermistor.bas” BASIC basic block, scheduled every one minute.
  • Time: An offset that specifies a delay between when the variable is measured and when it is logged.
  • Interval: This sets the time between logged values.
  • Name: Used by the gas analyzer software to identify the variable type and units. See Table 4‑1 to interpret the first number and Table 4‑2 to interpret the second.
  • Prefix: Ignore this field.
  • Suffix: Ignore this field.
  • Right Digits: The number of digits to the right of the decimal (hard stop) for this variable.
  • Name: Recorded in the header of the data file. Default variable names are similar to GHG-Europe standards (see VariableID).
  • Record ID: Tells the datalogger to associate this variable with the Record ID in the LogRec block (see Custom Configurations). It should be the same in both places.
  • Sequence #: The column number in the sequence of variables.
  • Right Digits: Number of digits right of the decimal.
  • Format: The data that is output when logged data is viewed. Typically <val>.
  • Units: The units entered will override previous entries.
The Display block is used select data that gets displayed on the I2C Display. The data displayed is the last measured value for the block connected to the display block. The data is displayed at the requested precision (right digits) with the selected Label.