Requests At Installation; To Ensure Prolonged Use; To Reduce The Influence Of Noise; To Ensure High-Precision Measurement - Omron E5GN User Manual

2.3 Requests at Installation

JTo ensure
prolonged use
JTo reduce the
influence of noise
JTo ensure
high–precision
measurement
Use the temperature in the following operating environment:
Temperature : -10 to +55°C (icing and condensation not allowed)
Humidity : 25 to 85%
When the temperature controller is incorporated in a control panel, make
sure that the controller's ambient temperature and not the panel's ambi
ent temperature does not exceed 55°C.
The life of electronic equipment such as temperature controllers is in
fluenced not only by the life determined by the relay switching count but
also by the life of the electronic components used internally. The service
life of components is dependent on the ambient temperature: the higher
the ambient temperature becomes, the shorter the service life becomes,
and vice versa. For this reason, the service life of the temperature control
ler can be extended by lowering its internal temperature.
Gang-mounting two or more temperature controllers, or mounting temper
ature controllers above each other may cause heat to build up inside the tem
perature controllers, which will shorten their service life. When mounting
temperature controllers like this, forced cooling measures such as a cooling
fan for cooling the temperature controllers must be taken into consideration.
Prevent only the terminal block from being cooled. Otherwise, this may
result in a measurement error.
To reduce induction noise, the leads on the temperature controller's ter
minal block must be wired separately from large-voltage/large-current
power leads. Also, avoid wiring leads in parallel with power leads or in the
same wiring path. Other methods such as separating conduits and wiring
ducts, or using shield wire are also effective.
Attach a surge absorber or noise filter to peripheral equipment that gener
ates noise (in particular, motors, transformers, solenoids, or other equip
ment that has a magnetic coil or other inductance component).
When a noise filter is used at the power supply, first check the voltage or
current, and attach the noise filter as close as possible to the temperature
controller.
Also, install the temperature controller as far away as possible from equip
ment that generates strong, high frequency (e.g. high-frequency welders,
high-frequency sewing machines) or surges.
When the thermocouple leads are extended, be sure to use a compensating
lead wire matched to the type of thermocouple.
When the platinum resistance detector leads are extended, use the lead
having the smallest resistance to equalize the resistance of the three leads.
Install the temperature controller so that it is horizontal.
If there is a large error in the measurement values, make sure that input
compensation has been set correctly.
Requests at Installation 2.3
2–7