Precautions for Safe Use
8
Digital Temperature Controllers (Simple Type) User’s Manual (H211)
Precautions for Safe Use
Be sure to observe the following precautions to prevent operation failure, malfunction, or adverse
affects on the performance and functions of the product. Not doing so may occasionally result in unex-
pected events. Use the product within the specifications.
• The product is designed for indoor use only. Do not use or store the product outdoors or in any of the
following locations.
Locations directly subject to heat radiated from heating equipment.
Locations subject to splashing liquid or oil atmosphere.
Locations subject to direct sunlight.
Locations subject to dust or corrosive gas (in particular, sulfide gas and ammonia gas).
Locations subject to intense temperature change.
Locations subject to icing and condensation.
Locations subject to vibration and large shocks.
• Use and store the Digital Controller within the rated ambient temperature and humidity.
Gang-mounting two or more Digital Controllers, or mounting Digital Controllers above each other may
cause heat to build up inside the Digital Controllers, which will shorten their service life. In such a
case, use forced cooling by fans or other means of air ventilation to cool down the Digital Controllers.
• To allow heat to escape, do not block the area around the product. Do not block the ventilation holes
on the product.
• Be sure to wire properly with correct polarity of terminals.
• Use the specified size of crimped terminals (M3, width of 5.8 mm or less) for wiring. To connect bare
wires to the terminal block, use copper braided or solid wires with a gage of AWG24 to AWG18
(equal to a cross-sectional area of 0.205 to 0.8231 mm
2
). (The stripping length is 6 to 8 mm.) Up to
two wires of the same size and type, or two crimped terminals can be inserted into a single terminal.
• Do not wire the terminals that are not used.
• To avoid inductive noise, keep the wiring for the Digital Controller's terminal block away from power
cables that carry high voltages or large currents. Also, do not wire power lines together with or
parallel to Digital Controller wiring. Using shielded cables and using separate conduits or ducts is
recommended.
Attach a surge suppressor or noise filter to peripheral devices that generate noise (in particular,
motors, transformers, solenoids, magnetic coils or other equipment that have an 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 Digital Controller.
Allow as much space as possible between the Digital Controller and devices that generate powerful
high frequencies (high-frequency welders, high-frequency sewing machines, etc.) or surge.
• Use this product within the rated load and power supply.
• Make sure that the rated voltage is attained within 2 seconds of turning ON the power using a switch
or relay contact. If the voltage is applied gradually, the power may not be reset or output malfunctions
may occur.
• Make sure that the Digital Controller has 30 minutes or more to warm up after turning ON the power
before starting actual control operations to ensure the correct temperature display.
• When executing self-tuning, turn ON power for the load (e.g., heater) at the same time as or before
supplying power to the Digital Controller. If power is turned ON for the Digital Controller before turning
ON power for the load, self-tuning will not be performed properly and optimum control will not be
achieved.
To Next Page
Loading...
Need help?
General
