Safety Precautions
This section provides precautions to enable you to use the product safely and correctly and to
prevent injury and damage. The terms of DANGER, WARNING, and CAUTION indicate the
degree of imminency and hazardous situation. Read the precautions carefully as it contains
important safety messages.
WARNING
To connect any load exceeding the contact capacity or any induction load (e.g., a motor or a pump),
be sure to use a power relay exceeding the load rating.
If there is a possibility of a lightning strike, install an arrester on the output side of the converter and on
the side of receiving instruments.
Be sure to ground the grounding terminal (class D grounding).
Electric shock hazard
Be sure to check that no power is supplied before starting work.
The air contained in the covered biological processing tank is of a low oxygen concentration, so there
is the danger of suffocation.
CAUTION
If the instrument's power source is OFF, the C-NC contact is short-circuited. Therefore, be careful
about the connection of any load.
If there is corrosive gas in the installation environment, send clean instrumentation air from the air
purge inlet to the device.
Since the operation of the device at any voltage outside the rated range can cause damage to the
unit, confirm the power supply voltage.
Do not turn the sensor head (tip part). Otherwise, the detector may be damaged.
Do not drop anything in the biological processing tank, such as a MLSS detector, tools, and
holdbacks. Perform your work carefully.
The sensor head is not provided with a protective cover against drop impact.
Handle the sensor head with care when taking it out in air.
