Hach sc1000 User Manual

81
Advanced Operations
Relation between input current and calculated concentration
Figure 50 shows the output current depending on the process value, the set low value
and the set high value with an output range of 0
–20 mA.
The output current (OC) is a function of the process value (PV).
The output current is determined by formula (1):
(1)
where:
OC=Output current
PV=Process value
LV=Low value
HV=High value
Figure 50 Output current with an output range of 0
–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 20 mA
4 High value (HV)
OC f(PV) (PV-LV)
20 mA
HV-LV
-----------------
×==

Hach sc1000 Specifications

General

Operating Temperature	-20 to 60 °C (-4 to 140 °F)
Inputs	Up to 2 digital or analog sensors
Outputs	2 analog, 2 relay
Communication	Modbus
Power Supply	100-240 VAC
Enclosure Rating	IP66, NEMA 4X