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Service Life
1. Use the product within the following temperature and humidity ranges:
Temperature:
−10 to 55°C (with no icing or condensation)
Humidity: 25% to 85%
If the product is installed inside a control board, the ambient temperature
must be kept to under 55
°C, including the temperature around the product.
2. The service life of electronic devices like Temperature Controllers is deter-
mined not only by the number of times the relay is switched but also by the
service life of internal electronic components. Component service life is af-
fected by the ambient temperature: the higher the temperature, the shorter
the service life, and the lower the temperature, the longer the service life.
Therefore, the service life can be extended by lowering the temperature of
the Temperature Controller.
3. When two or more Temperature Controllers are mounted horizontally close
to each other or vertically next to one another, the internal temperature will
increase due to heat radiated by the Temperature Controllers and the ser-
vice life will decrease. In such a case, use forced cooling by fans or other
means of air ventilation to cool down the Temperature Controllers. When
providing forced cooling, however, be careful not to cool down the termi-
nals sections alone to avoid measurement errors.
Measurement Accuracy
1. When extending or connecting the thermocouple lead wire, be sure to use
compensating wires that match the thermocouple types.
2. When extending or connecting the lead wire of the platinum resistance
thermometer, be sure to use wires that have low resistance and keep the
resistance of the three lead wires the same.
3. Mount the product so that it is horizontally level.
4. If the measurement accuracy is low, check to see if input shift has been set
correctly.
Operating Precautions
1. It takes approximately two seconds for the outputs to turn ON from after
the power supply is turned ON. Due consideration must be given to this
time when incorporating Temperature Controllers in a sequence circuit.
2. When using self-tuning, turn ON power for the load (e.g., heater) at the
same time as or before supplying power to the Temperature Controller. If
power is turned ON for the Temperature Controller before turning ON pow-
er for the load, self-tuning will not be performed properly and optimum con-
trol will not be achieved.
3. When starting operation after the Temperature Controller has warmed up,
turn OFF the power and then turn it ON again at the same time as turning
ON power for the load. (Instead of turning the Temperature Controller OFF
and ON again, switching from STOP mode to RUN mode can also be
used.)
4. Avoid using the Controller in places near a radio, television set, or wireless
installation. These devices can cause radio disturbances which adversely
affect the performance of the Controller.
Precautions for Correct Use
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