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1. Installation precautions
Caution
This instrument is intended to be used under the following environmental
conditions (IEC61010-1): Overvoltage category , Pollution degree 2
Mount the controller in a place with:
• A minimum of dust, and an absense of corrosive gasses
• No flammable, explosive gasses
• Few mechanical vibrations or shocks
• No exposure to direct sunlight, an ambient temperature of 0 to 50 (32 to 122 )
that does not change rapidly
• An ambient non-condensing humidity of 35 to 85%RH
• No large capacity electromagnetic switches or cables through which large current is
flowing
• No water, oil or chemicals or where the vapors of these substances can come
into direct contact with the unit
Note: Although the case of this instrument is made of flame-resistant resin, do not install
this instrument near flammable material.
Avoid setting this instrument directly on flammable material.
2. Wiring precautions
Caution
• Use the solderless terminal with an isolation sleeve that fits to the M3 screw when
wiring the PCD-33A.
• The terminal block of this instrument is designed to be wired from the left side.
The lead wire must be inserted from the left side of the terminal, and fastened with
the terminal screw (M3).
• Tighten the terminal screw (M3) within the specified torque.
If excessive force is applied to the screw when tightening, the screw (M3) or case
may be damaged.
• Do not apply a commercial power source to the sensor which is connected to
the input terminal nor allow the power source to come into contact with the
sensor, as the input circuit may be burnt out.
• This controller has no built-in power switch or fuse. It is necessary to install them
near the controller.
(Recommended fuse: Time-lag fuse, Rated voltage 250V AC, Rated current 2A)
• When using a 24V AC/DC for the power source, do not confuse the polarity when
it is DC.
3.Running and maintenance precautions
Warning
• It is recommended to perform PID auto-tuning during trial run.
• Do not touch live terminals. This may cause electric shock or problems in operation.
• Turn the power supplied to the instrunment OFF before retightening the terminal.
Working or touching the terminal with the power switched ON may result in severe
injury or death due to Electric Shock.
• Be sure to turn OFF the power to the PCD-33A before cleaning.
• Wipe the instrument using a soft dry cloth.
(If paint thinner is used for wiping, the instrument may be deformed or discolored.)
• The display part is vulnerable. Do not strike it with hard objects or press hard
on it.
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