2. Installation
Attach the brackets (2 units) on the fixed halls and tighten with a screwdriver.
Fixing torque is about 14.7N. cm (1.5kg.cm).
(Care should be taken not to tighten forcedly.)
Indoor use.
Altitude up to 2000m use.
Mains supply voltage fluctuations not to exceed 10 of the normal voltage.
Installation Categories
Pollution degree 2
3. Caution on terminal connections
Use a compensating cable with thermocouple.
For R.T.D input use a cable which is a small lead wire resistance and without resistance
difference to 3wires.
To avoid inductive noise to input wires separate from the power and output wires.
Keep input wires away from output wires and use shielded wires to earth.
If the wiring has noise, use the following step: connect a surge absorber to the conductor coil
side if the conductors are connected to the load output, such as the relay contact output.
Use an insulating transformer with a noise filter when the power suppy has much noise.
Noise filter should be mounted on a panel which has been earthed and the wiring between the
noise filter output and the instrument power terminals should be shorten.
It is effective to use a twisted cable for power supply against noise.
The heater power supply and the instrument power supply should be connected using the
same power suppy when a heater break alarm.
Time for preparation of contact output is required at power ON. When the output signal is used
for an extenal interlock circuit, connect a delay relay.
4. For load circuit connection
Use an extra relay when the frequency of operation is rather high. In this case, SSR output type
is Recommended.
Electromagnetic switch : Proportional cycle time is Min. 30 sec
SSR : Proportional cycle time is Min. 2 sec
Contact output life : Mechanical : Min. 10 million times (no load)
Electrical : Min. 100 thousand times (rated load)
SSR drive pulse voltage, DC 4~20mA are not insulated with internal circuit.
Use non-grounded sensor to R.T.D and thermocouple.
5. Caution on key operation / trouble
If alarm function is not set correctly, alarm output can not operate correctly a trouble.
Be sure to check the alarm operation.
If the input cable is disconnected, the display shows “ ”.
When replacing the sensor, please turn OFF the power supply.
6. Other
Do not use organic solvents such as alcohol, benzine when cleaning. (Use neutral detergent)
5
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