Instruction manual

2 Installation
13
2.3.2 Connecting the sensor cable
Precautions for handling the sensor cable
The conductivity sensor cable is highly insulated. Follow the instructions below when handling
it.
z Do not wet the terminals of the cable or the terminal block, nor stain them with finger
marks or oil. Otherwise, the insulation of the cable is weakened.
If the insulation is weakened, the readout may become unstable. Keep the cable dry and
clean all the time.
If a terminal is stained, wipe the dirt off using alcohol or the like and dry the terminal well.
z Allow enough cable length for calibration, or inspection/replacement of the sensor.
z Wire the sensor cable and junction cables keeping them off any devices that may give
inductive interferences such as a motor or its cables.
Connection
The sensor cable has the following terminals.
Connect the cable to the terminal block as shown in the figure below. Making sure that each
terminal of the cable is connected to the counterpart of the block correctly.
1
：
Conductivity sensor terminal (1)
2
：
Conductivity sensor terminal (2)
T, T
：
Temperature compensation sensor terminal
E
：
Shielded wire
Terminal
block
Relay cable
C-5C
Sensor
Industrial conductivity
meter (HE-480C)
Relay box
CT-20EC