View source for Super Site LI7200 Recalibration

===Tools required in field for instrument removal===
* Large crescent wrench to remove 1 meter air intake rod
* Flat head Campbell Screwdriver to remove chamber pressure line
* possibly pliers though crescent wrench has worked fine to remove line running to air pump
* a couple of different #2 phillips (long to get started and then short for turning) to remove the phillips at the base

===Lab cleanup===
* polish laser glass
* check Thermocouples (T_in)

===Lab Procedure===
# Power up the head and let it run 20-30 minutes
# connect up the Nitrogen and let it run for 20-30 minutes and the instrument will stabilize
# connect up the first standard and let it run 5-10 minutes and then set the point
# connect the dew point generator and after things stabilize then set the first dewpoint
# move the settings on the dewpoint generator to the high point and then after things stabilize measure set point 2
# connect the second standard and let it run 5-10 minutes and then set the second set point.

===Extra Advice===
It only takes a couple minutes to stabilize the CO2 and N, but you should power up the head and run it for 20-30 min first.  The dew point can take a long time, use the graph feature to monitor.  Make sure you choose a dewpoint well below the ambient temp and make sure that all the hoses and instruments are roughly the same temperature.  Or else you'll get condensation and be really frustrated.

Ameriflux is now recommending that you just do a single span not the dual span, and then check with ambient.  But this is up to the Jamstec folks on how to run their calibrations.  I'm now using a CO2 span of 550ppm or so, and checking with an ambient of 405.  I use a dewpoint of 10 or 12C for span.
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