YSI IQ SensorNet ViSolid Sensor 700 IQ - Manual (Page 35)

ViSolid
®
700 IQ (SW) Measuring
ba76040e04 05/2014 4 - 7
4.2.4 User calibration
The displayed values of total suspended solids are calculated with the
aid of the stored calibration data. In the mg/l TSS measuring mode, the
value mg/l SiO2 marked with "#" is displayed as the secondary mea-
sured value.
The determination of the calibration value pairs is carried out by refer-
ence measurements according to an independent procedure. At the
point of time of the calibration, the measuring medium should be in a
state representative of the later measurement (type and amount of
total suspended solids, coloration, etc.). The results from the calibration
are manually entered in the setting table of the ViSolid
®
700 IQ (SW).
Effect of the
measurement
environment on the
graph of the value pairs
TSS (laboratory) - SiO2
(ViSolid
®
700 IQ (SW) )
Graphs of the value pairs Explanations
Form 1
:
The graph has a gradient > 0 at every
point.
A calibration is possible for the whole
range.
Form 2 :
The graph has a gradient > 0 at every
point.
At very low levels of TSS, the effect of
the measurement environment leads
to slightly increased values of SiO2.
A calibration is possible for the whole
range.
Form 3 :
The graph has a gradient < 0 in the
range of smaller levels of TSS.
The effect of the measurement envi-
ronment leads to greatly increased val-
ues of SiO2 in the range of smaller
TSS below the point (A). A calibration
is only possible in the range TSS > A.
Form 4 :
The graph has a gradient < 0 in the
range of greater levels of total sus-
pended solids.
A calibration for matrix type 1 is only
possible in the range of TSS < B.
For measurements in the range of
TSS > B, select matrix type 2.
SiO2
[mg/l]
TSS [mg/l]
SiO2
[mg/l ]
TSS [mg/l]
SiO2
[mg/l ]
TSS [mg/l] A
SiO2 [mg/l]
TSS [mg/l] B