Hach sc1000 - Manual (Page 88)

86
Advanced Operations
Figure 53 shows the output value depending on the input current, the set low value and
the set high value with an input range of 4 – 20 mA.
The output value (OV) is determined according to formula (4) :
(4)
where:
OV=Output value
IC=Input current
LV=Low value
HV=High value
Figure 53 Output value with an input range of 4 – 20 mA
1 Output value (concentration) (y-axis) 5 4 mA
2 OV=f(IC) 6 0 mA
3 Input current (x-axis) 7 Low value (LV)
4 20 mA 8 High value (HV)
OV f(IC)
HV-LV
16mA
----------------- (IC-4mA) × LV
+ = =