Hach-Lange SC 1000 - Manual (Page 84)

82
Advanced Operations
The output current is determined according to formula (2) :
where:
OC=Output current
PV=Process value
LV=Low value
HV=High value
6.3.2 Current inputs menu
Note: The menus appear only if an input card is installed in the sc1000 controller.
The current input card can be used as an analog input card to measure an input current
in a range from 0
– 20 mA or 4 – 20 mA or it can be used as an digital input card. The
current input menu content depends on its use:
Figure 52 Output current with an output range of 4 – 20mA
1 Output current (OC) (y-axis) 5 Low value (LV)
2 OC=f(PV) 6 0 mA
3 Process value (PV) (x-axis) 7 4 mA
4 High value (HV) 8 20 mA
(2) OC = f(PV) =
16 mA
× (PV – LV) + 4 mA
HV – LV