Veris Technologies VIS_NIR Spectrophotometer Probe - Operating Instructions - Manual (Page 27)

OM17-P4000VIS-NIR
4-6
2. Data Acquisition – The collection of spectral and auxiliary data in the field. Data is
streamed to a file in a compact format.
Pressing the PROBE button stores spectrum data as absorbance and auxiliary data,
which includes EC data, the PROBE button key has been pressed again or the probe
pulled out of the ground. No data can be logged if there is no GPS signal or there is a
bad ref check. No data, including EC data, will be stored unless the program is in LOG
mode.
System will alert the user to take a dark and reference every 10 minutes
—the next time
the PROBE button is pressed after a 10-minute period.
If an extra dark and reference is desired, pressing F2 or Dark & Ref stores a new
reference and dark spectrum. Pressing F4 or sample will store transformed spectrum
data as absorbance into the acquisition_samples file located in the field directory.
Once all data has been acquired press F12 or End to return to the main interface.
Soil EC is recorded simultaneously with NIR data. When EC is being collected, EC
value will appear in the shallow window. The deep will be a -1 because it is not used
with the probe. Note: unit must be in Log mode for EC to be recorded. Also, see
Maintenance section for information on testing EC system output.
Before mapping complete the following:
Start system at least 20 minutes before starting to map to ensure the spectrometers
have stabilized
Make sure auxiliary sensor data is coming in (see Glossary for auxiliary sensor data
definition).
Make sure all auxiliary lights are green.
Complete all steps above. Make sure Reference Check (Ref Check) light is green, and
GPS data are being received.