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3
Measuring principle
Turbidity Checker TC-Mi uses a method of 90 degree scattered light. In
this method, a light source illuminates the surfaces of matter suspended
in the water, and the light is scattered by these surfaces is detected by
a photo element installed at an angle of 90 degrees from the light axis
of the measured light. The turbidity is determined by the amount of the
scattered light.
Measuring light
Light source
10
Measured water
Suspended matter
Scattered light
Photo element
4
Installation
1
Installing TC-Mi unit
Before installation, remove the cable from the power
supply, and after completion, wire the power supply
cable.
denotes "Prohibited action"
• The TC-Mi unit must be installed at the place
which is well-ventilated, and is not exposed to
direct sunlight.
• The signal output cable and the power cable
must not be bound together or put in the same
cable clamps.
denotes "Required action"
• For wiring the unit, use the bundled cable
clamps.
• Securely tighten the panel fixing screws. When
the screws are loose, sufficient protection
cannot be obtained.
Keep the Power off during
installation and wiring
operations.
• Make sure that TC-Mi is not
energized before installing
and wiring.
Turn OFF the power switch.
Disconnect the power cable
from the outlet.
Otherwise, it could result in
fire, electric shock, and
damage.
11
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