Veris Technologies VIS_NIR Spectrophotometer - Operating Instructions - Manual (Page 24)

Pub# OM17-NIR Shank
3-5
2) Data Acquisition--electronics – The collection of spectral and auxiliary data in the
field. Data is streamed to a file in a compact format.
Pressing LOG button or ESC key stores spectrum data as absorbance and auxiliary
data, which includes EC data, until LOG button or ESC key has been pressed again. 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 it program is in LOG mode. Whenever shank is
raised out of the soil, press LOG button or ESC key to stop logging, re-press LOG
button or ESC key to re-start logging when shank is in soil.
System will automatically collect a dark and reference every 10 minutes
—the next time
the LOG button or ESC key is pressed after a 10-minute period. Before re-starting at
the end of each round, check to make sure system isn’t collecting a dark and reference.
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 a reference, dark, then
transformed spectrum data as absorbance into the acquisition_samples file located in
the field directory.
When all data have been acquired press F12 or End to return to the main interface.
Soil EC is recorded simultaneously with NIR data, provided the unit is equipped with soil
EC coulter module, and cables are connected properly. When EC is being collected, EC
values will appear in the shallow and deep EC windows, as shown in Figure 10. 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.
Set depth so that EC coulters penetrate approximately 1.5"
Make sure the implement frame is level with the ground surface
Pull forward with shank in ground. The absorbance should not rise more than 0.1.