YSI IQ S ENSOR N ET VARiON Plus 700 IQ User Manual
Page 34
Matrix adjustment, check and calibration
VARiON
®Plus
700 IQ
4 - 4
ba76000e01
01/2012
Practical instructions
Ammonium and nitrate have to be determined immediately after
taking the sample as the their content changes very quickly due to
the micro organisms that are present. It is best to take the sample
using a syringe filter for transport to the laboratory or to stabilize it
otherwise. When adding stabilizing solutions, the dilution factor has
to be taken into account.
While determining the reference concentrations in the lab (step 2),
you can use the sensor for control purposes again by switching the
maintenance condition off and thus releasing the linked outputs. The
sensor continues to use the data of the previous matrix adjustment
(or calibration). The reference voltages determined in step 1 will not
be lost. They remain stored until step 3 of the matrix adjustment is
completed. They do not have to be noted and entered again.
Use the Online help if you are unsure of anything during the matrix
adjustment.
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