Data file structure

After a data file is exported from the computer software as a tab-delimited or comma-delimited text file, it can be imported into a spreadsheet application. Data are organized into groups as indicated in the first row. The second row contains the data label, and the third row contains additional information such as unit, format, or equation.

The fluorometer, leaf angle, and GPS groups will be absent from the data files of previous LI-600 models without those features.

Groups, variables and units

To view a variable's unit of measure or format, see the third row of the data table as imported into a spreadsheet application. The example below shows information in the fluorometer configuration group.

Groups, labels and descriptions

Following is a list of groups and labels in each data file, and the description for each label. See Flash files for information on flash files. The tables are organized as follows.

Group
label	Description

System

The System group consists of five parameters for each measurement. Time and Date are set manually in Settings or synced from GPS (recommended) on the device. See Settings and Clocks.

SYS
Obs#	Observation/record number
Time	Time of observation: HHMMSS
Date	YYYYMMDD
configName	Configuration name
configAuthor	Configuration author

User Defined

The User Defined group contains the remarks and labels created in Configuration Management in the computer software. See Remarks and Data Labels for configuring them. See Taking a measurement for adding them to measurements. At least one label must be formatted as a barcode to enable the barcode scanner.

USERDEF
remark	Mark reason -alphanumeric
barcode	Label 1 barcode, list, or number
	Label 2 barcode, list, or number
	Label 3 barcode, list, or number

Porometry

The Porometry Group contains the data collected from the LI-600 porometer.

PORO
gsw	Stomatal conductance
gbw	One-sided boundary layer conductance
gtw	Total conductance
E_apparent	Transpiration
VPcham	Chamber vapor pressure
VPref	Reference vapor pressure
VPleaf	Leaf vapor pressure
VPDleaf	Vapor pressure deficit
H2O_r	Reference H2O mole fraction
H2O_s	Chamber H2O mole fraction
H2O_leaf	Leaf H2O mole fraction
leaf_area	Leaf area in cm2
leaf_width	Leaf width in mm

Fluorometry

The Fluorometry Group contains the data collected from the LI-600 Fluorometer.

FLUORO
flashID	Flash file ID
Fo	Minimum fluorescence in dark
Fm	Maximum fluorescence in dark
Fv/Fm	Quantum efficiency in dark
Fs	Minimum fluorescence in light
Fm'	Maximum fluorescence in light
PhiPS2	Quantum efficiency in light
PS2/1	Ratio of PSII to PSII absorptance
abs	Leaf light absorptance
ETR	Electron transport rate
TRANS	Transmission factor

Sensor

The Sensor group contains the values recorded by the relative humidity, temperature, flow, pressure, and PAR sensors as well as the battery voltage. The output in the SENSOR group is calculated from the SENSOR_V and calibration coefficients determined at the factory.

SENSOR
rh_s	Sample relative humidity
rh_r	Reference relative humidity
Tref	Block reference temperature
Tmeas	IRT leaf (sample) temperature
Tleaf	Calculated leaf temperature
P_atm	Atmospheric pressure
flow	Flow rate to cuvette
flow_s	Exhaust flow leaving cuvette
leak_pct	Flow percent leak
Qamb	Ambient light
batt	Battery voltage

Leaf angle

The leaf angle group contains measurements from the magnetometer, accelerometer, GPS, and calculated variables. See Leaf angle and GPS. This group will not be included in data files from instruments without an accelerometer/magnetometer.

LEAF_ANGLE
pitch	Slope from horizontal
roll	Rotation from horizontal
heading	Rotation from North
angle_inc_leaf	Angle of incidence between the leaf and the sun
direct_pct	Proportion of direct irradiance incident on leaf
slope_leaf	Leaf inclination from horizontal
az_leaf	Leaf rotation from south
dec_solar	Angular position of sun with respect to equator
az_solar	Solar rotation
zenith_solar	Solar zenith angle

GPS

The GPS group contains the GPS coordinates, altitude, number of satellites, and horizontal dilution of precision. For important information about GPS time, see Clocks. This group will not be included in data files from instruments without a GPS receiver.

GPS
gps_time	YYYYMMDD
gps_date	HHMMSS
latitude	Latitude
longitude	Longitude
altitude	Altitude (meters)
gps_sats	Number of GPS satellites
gps_HDOP	GPS horizontal dilution of precision

Match

The Match group records the time and date of the RH sensor matching and the sensor correction. See Measurement Settings, and Taking a measurement

MATCH
match_time	Match time
match_date	Match date
rh_adj	Relative humidity sensor correction
type	Valved (0) or serial (1) match

Stability

The Stability group records the measurement stability of stomatal conductance(gsw), slope, and fluorescence (flr) at 1, 2, and 4 seconds. See Taking a measurement, step 6.

STABILITY
gsw1sec	Stomatal conductance at 1 sec
gsw2sec	Stomatal conductance at 2 sec
gsw4sec	Stomatal conductance at 4 sec
flr1sec	Slope and fluorescence at 1 sec
flr2sec	Slope and fluorescence at 2 sec
flr4sec	Slope and fluorescence at 4 sec

Porometer configuration

See Measurement Settings.

P_CONFIG
auto	Auto mode (0 for LI-600N)
flow_set	Flow set point
gsw_limit	gsw slope limit
gsw_period	gsw period
aw	Area to width conversion factor
Bla	Boundary layer coefficient a
Blb	Boundary layer coefficient b
Blc	Boundary layer coefficient c
Bld	Boundary layer coefficient d
Ble	Boundary layer coefficient e
chamber	Standard (0) or Needle (1)

Fluorometer configuration

See Measurement Settings.

FL_CONFIG
dark	Dark adapted or not
flash_type	Flash type
flash_intensity	Flash intensity
modrate	Modulation rate
flr_limit	Flr slope limit
flr_period	Flr period
P1_dur	MPF phase 1 duration
P2_dur	MPF phase 2 duration
P3_dur	MPF phase 3 duration
P1_Fmax	Phase 1 maximum fluorescence
P2_ramp	Phase 2 ramp depth
P2_slp	Phase 2 regression slope
P3_Fmax	Phase 3 maximum fluorescence
P3_Pred	Phase 3 predicted fluorescence
P3_DeltaF	Phase 3 measured–phase 3 predicted

Sensor voltage

The Sensor Voltage group reports the voltage for each of the sensors. The output in the SENSOR group is calculated from the SENSOR_V values and calibration coefficients determined at the factory.

SENSOR_V
v_humA	Reference RH sensor (poro)
v_humB	Sample RH sensor (poro)
v_flowIn	Inlet flow sensor (poro)
v_flowOut	Outlet flow sensor (poro)
v_temp	Thermistor (poro)
v_irt	IRT target temperature (poro)
v_pres	Pressure sensor (poro)
v_par	Quantum sensor (poro)
v_F	De-modulated fluorescence (fluoro)
i_LED	LED current (optional) (fluoro)

User calibrations

See Calibrating the sensors, and Drop-down menu.

USERCAL
b_rhr	Ref RH sensor zero intercept (poro)
m_rhr	Ref RH sensor slope (poro)
span_rhr	Ref RH sensor span (poro)
b_rhs	Sam RH sensor zero intercept (poro)
m_rhs	Sam RH sensor zero slope (poro)
span_rhs	Sam RH sensor span (poro)
z_flowIn	Flow in zero (poro)
z_flowOut	Flow out zero (poro)
z_quantum	Quantum sensor zero (poro)
z_flr	Fluor zero (optional) (fluor)

Metadata

The metadata for each measurement includes instrument and sensor serial numbers, embedded firmware version, and when the configuration was last updated. Metadata for each data file can be viewed in the LI-600 computer software. See Local Files.

META
flashId	Flash ID (fluoro)
lciSerNum	Instrument serial#
lcpSerNum	Porometer serial#
lcfSerNum	Fluorometer serial#
lcrhSerNum	RH sensor serial number
version	Embedded version
configUpdatedAt	Configuration update date

Flash files

Flash files are fluorometer data files. If a data file contains fluorometer measurements, a flash file for each measurement is downloaded and included in the .zip file exported from the computer software. See Measurement Settings.

Flash Files
flashId	Flash file ID
time	HHMMSS
date	YYYYMMDD
lciSerialNumber	Instrument serial#
lcpSerialNumber	Porometer serial#
lcfSerialNumber	Fluorometer serial#
Fm	Fm
Fo	Fo
Fv/Fm	Fv/Fm
Fm'	Fm'
Fs	Fs
PhiPS2	ΦPSII
LightIntensity	Light intensity