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Safety Precautions
Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/.
Warning Indications
Indicates a potentially hazardous situation
CAUTION
which, if not avoided, may result in minor or
moderate injury or in property damage.
Precautions for Safe
Supplementary comments on what to do or
Use
avoid doing, to use the product safely.
Precautions for
Supplementary comments on what to do or
Correct Use
avoid doing, to prevent failure to operate,
malfunction, or undesirable effects on
product performance.
Meaning of Product Safety Symbols
Used to warn of the risk of electric shock under
specific conditions.
Used for general prohibitions for which there is no
specific symbol.
Used to indicate prohibition when there is a risk of
minor injury from electrical shock or other source if
the product is disassembled.
Used for general mandatory action precautions for
which there is no specified symbol.
CAUTION
Electrical shock may cause minor injury.
Do not touch terminals while electricity is being supplied.
There is a risk of minor electrical shock, fire, or device failure.
Do not allow any pieces of metal, conductors, or cutting chips
that occur during the installation process to enter the product.
Explosions may cause minor injuries. Do not use the product
in locations with inflammable or explosive gases.
There is a risk of minor electrical shock, fire, or device failure.
Do not disassemble, modify, repair, or touch the inside of the
product.
Loose screws may cause fires. Tighten terminal screws to the
specified torque of 0.49 to 0.59 N·m.
Use of excessive torque may damage the terminal screws.
Tighten terminal screws to the specified torque of 0.49 to 0.59
N·m.
If the setting does not match the element to be monitored, the
product may behave unexpectedly and damage the machine
or cause accidents. Set the K8AK-TH as described below.
• Adjust each set value on the K8AK-TH correctly for the
element that is to be monitored.
• Turn OFF the power to the K8AK-TH before you change
the switch settings on the side panel. The switch
settings made on the side panel take effect when the
power is turned ON.
If the K8AK-TH fails, the monitoring alarms and alarm outputs
may fail to operate. This may result in physical damage to the
facilities, equipment, or other devices that are connected to it.
To reduce this risk, inspect the product regularly. To make the
product fail-safe, take alternative safety measures, such as the
installation of monitoring devices on a separate circuit.
Use of the product beyond its life may result in contact welding
or burning. Make sure to consider the actual operating
conditions and use the product within its rated load and
electrical life count. The life of the output relay varies
significantly with the switching capacity and switching
conditions.
Precautions for Safe Use
1. Do not use or store the product in the following locations.
• Locations subject to water or oil
• Locations subject to direct radiant heat from heating equipment
• Outdoor locations or under direct sunlight
• Locations subject to dust or corrosive gases (particularly
sulfurizing gases, ammonia, etc.)
• Locations subject to rapid temperature changes
• Locations prone to icing and dew condensation
• Locations subject to excessive vibration or shock
• Locations subject to wind and rain
• Locations subject to static electricity and noise
• Habitats of insects or small animals
2. Use and store the product in a location where the ambient
temperature and humidity are within the specified ranges. If
applicable, provide forced cooling.
3. Mount the product in the correct direction.
4. Check terminal polarity when wiring and wire all connections
correctly. The power supply terminals do not have polarity.
5. Do not wire the input and output terminals incorrectly.
6. Make sure the power supply voltage and loads are within the
specifications and ratings for the product.
7. Make sure the type of the thermocouple matches the input type
that the K8AK-TH is designed for.
8. If you need to extend the length of the lead wires on the
thermocouple to use with the K8AK-TH, make sure to match the
type of thermocouple and always use compensating conductors.
9. To extend the lead wires on the platinum resistance thermometer
that is used with the K8AK-TH, use lead wires with a low
resistance (5 Ω or less per wire), and make the resistance equal
on all three lead wires.
10.Make sure the crimp terminals for wiring are of the specified size.
11.Do not connect anything to terminals that are not being used.
12.Use a power supply that will reach the rated voltage within 1
second after the power is turned ON.
13.After you turn ON the power, it takes 2 seconds for the outputs of
the K8AK-TH to stabilize. Take this time into account when you
design the control panel.
14.Allow at least 30 minutes for the K8AK-TH to warm up. During this
time, the temperature measurements will be incorrect.
15.Keep wiring separate from high voltages and power lines that
draw large currents.
Do not place product wiring in parallel with or in the same path as
high-voltage or high-current lines.
16.Do not install the product near equipment that generates high
frequencies or surges.
17.The product may cause incoming radio wave interference. Do not
use the product near radio wave receivers.
18.Install an external switch or circuit breaker and label it clearly so
that the operator can quickly turn OFF the power supply.
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