Sensa Core ST-200 aQua, Руководство оператора

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ST-200 aQua
Operator’s Manual
57
SLOPE FACTOR:
Slope factor is used for multiplying the factor with the result obtained.
Figure 17
In the above graph, green line indicates the normal/reference state (All the control
levels lie with its range as per the Q.C sheet provided in the Q.C box) and red line
indicates the error/out-off state (Electrodes are reading either higher or lower).
After running all the three controls only, we can confirm that whether slope
factor/intercept should be added depending upon its readings.
In the above graph level-1, level-2 and level-3 of any parameter is reading on
higher side. In this case we have to add slope factor between 0.5 to 1. So, that level-1,
level 2 and level 3 results will be multiplied by that factor.
E.g.: In the above graph, when all the three Q.C levels are analyzed. We have got Na on
higher side. In this case, we have to insert slope factor of 0.92. Now, 0.92 will be
multiplied with the result of Na (e.g.: 130*0.92=119).
After adding slope factor we should run all the three controls and verify whether
selected parameter (parameter which needed correction) lie within its range. Slope factor
should be added and verified until the parameter lie in its range.
If level-1, level-2 and level-3 of Na is reading on lower side (i.e. reverse of above
case). Then, we have to add slope factor between 1to 1.5. So, that level-1, level 2 and level
3 results will be multiplied by that factor.
Y = m X + C
Where, m = slope. If we add slope factor from 0.5 to 1, then our output(Y) will be
decreased. Since, slope factor will be multiplied with X (obtained result). Similarly, if we
add slope factor from 1 to 1.5, then our output will be increased. Since, slope factor will
be multiplied with X (obtained result).
Note:
Slope factor ranges from 0.5 to 1.5 for Na, K, iCa, pH, Li, Cl parameters individually.