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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
Ensure the mounting location corresponds to the following conditions:
• A minimum of dust, and an absence of corrosive gases
• No flammable, explosive gases
• No mechanical vibrations or shocks
• No exposure to direct sunlight, an ambient temperature of 0 to 50
(32 to 122 ) that does not
change rapidly, and no icing
• 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
• If the WCL-13A is installed within a control panel, the ambient temperature of the unit - not the
ambient temperature of the control panel - must be kept to under 50 . Otherwise the life of
electronic parts (especially electrolytic capacitors) of the unit will be shortened.
Note • Do not install this instrument on or near flammable material even though the case of this
instrument is made of flame-resistant resin.
2. Wiring Precautions
Caution
• Do not leave wire remnants in the instrument, because they could cause a fire or a malfunction.
• Use a solderless terminal with an insulation sleeve in which the M3 screw fits when wiring the
WCL-13A.
• Tighten the terminal screw using the specified torque. If excessive force is applied to the screw
when tightening, the terminal screw may be damaged.
• This instrument does not have a built-in power switch, circuit breaker or fuse.
It is necessary to install them near the controller.
(Recommended fuse: Time-lag fuse, rated voltage 250 V AC, rated current 2 A)
• For a 24 V AC/DC power source, do not confuse polarity when using direct current (DC).
• 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.
• Use a thermocouple and compensating lead wire according to the sensor input specifications
of this controller.
• Use the 3-wire RTD according to the sensor input specifications of this controller.
• When using a relay contact output type, externally use a relay according to the load capacity
to protect the built-in relay contact.
• When wiring, keep input wires (thermocouple, RTD, etc.) away from AC sources or load wires.
3. Operation and Maintenance Precautions
Caution
• It is recommended that auto-tuning be performed during the trial run.
• Do not touch live terminals. This may cause an electric shock or problems in operation.
• Turn the power supply to the instrument OFF when retightening the terminal or cleaning.
Working on or touching the terminal with the power switched ON may result in severe injury or
death due to electric shock.
• Use a soft, dry cloth when cleaning the instrument.
(Alcohol based substances may tarnish or deface the unit.)
• As the display section is vulnerable, do not strike or scratch it with a hard object or put
pressure on it.
