E5CZ-R2T datasheet(60/64 Pages) OMRON

60 / 64 page

E5EZ-PRR

17.When using PID operation (self-tuning), turn ON the power supply

to the load (e.g., heater) at the same time or before turning the

power supply to the Temperature Controller ON. If power is turned

ON for the Temperature Controller before turning ON power

supply to the load, self-tuning will not be performed properly and

optimum control will not be achieved.

18.Design the system (e.g., control panel) to allow for the 2 seconds

of delay required for the Temperature Controller's output to

stabilize after the power is turned ON.

19.A switch or circuit breaker should be provided close to this unit.

The switch or circuit breaker should be within easy reach of the

operator, and must be marked as a disconnecting means for this

unit.

20.Approximately 30 minutes is required for the correct temperature

to be displayed after turning the power supply to the Temperature

Controller ON. Turn the power supply ON at least 30 minutes prior

to starting control operations.

21.When extending the thermocouple lead wires, always use

compensating conductors suitable for the type of thermocouple.

Do not extend the lead wires on a platinum resistance

thermometer. Use only low-resistance wire (5

Ω max. per line) for

lead wires and make sure that the resistance is the same for all

three wires.

22.When drawing out the Temperature Controller from the case, do

not apply force that would deform or alter the Temperature

Controller.

23.When drawing out the Temperature Controller from the case to

replace the Temperature Controller, check the status of the

terminals. If corroded terminals are used, contact faults with the

terminals may cause the temperature inside the Temperature

Controller to increase, possibly resulting in fire. If the terminals are

corroded, replace the rear case as well.

24.When drawing out the Temperature Controller from the case, turn

the power supply OFF first, and absolutely do not touch the

terminals or electronic components or apply shock to them. When

inserting the Temperature Controller, do not allow the electronic

components to come into contact with the case.

25.Static electricity may damage internal components. Always touch

grounded metal to discharge any static electricity before handling

the Temperature Controller. When drawing out the Temperature

Controller from the case, do not touch the electronic components

or patterns on the board with your hand. Hold the Temperature

Controller by the edge of the front panel when handling it.

26.Do not use paint thinner or similar chemical to clean with. Use

standard grade alcohol.

27.Use tools when separating parts for disposal. Contact with the

sharp internal parts may cause injury.

Precautions for Correct Use

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 determined 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 affected 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 service 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 terminals

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 power for the load, self-tuning will not be

performed properly and optimum control 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 installing. These devices can cause radio disturbances

which adversely affect the performance of the Controller.

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