Precautions On Safety; Alarm Symbols - Toho Electronics TTM-339 Operation Manual

1.Precautions on the use of the products
Ensure to read this manual before using the equipment. Take care to understand the following for the safe use of the equipment.
Ensure this manual to be in hands of a person using the equipment.

★ Precautions on safety

Alarms are defined and categorized into either one of four groups in this manual, depending on degrees of importance or risk
in terms of the safe use of the equipment or prevention of accident or damage on the equipment. For each alarm, symbol is
assigned as shown below.

★ Alarm symbols

Improper handling of the equipment
may cause fatality or serious injury for
Danger
an impending reality.
Improper handling of the equipment
Warning
may cause fatality or serious injury.
An alarm categorized in the group of Caution may still yield to serious result, depending on circumstances.
Any symbol for the four groups intends to raise user's attention for important description. Carefully observe it.
General caution, warning or
prohibition without
particularity.
Possible injury caused by touching a
particular portion of the equipment
under specific conditions.
Hazard of an electric shock
under specific conditions
Improper wiring to the equipment may cause a failure, such as fire. Upon completion of wiring, ensure to verify the
proper wiring before turning on electricity.
Do not turn on electricity until all wiring is complete. Do not touch portions of high voltages such as power supply
terminals, as an electric shock may be resultant.
Install appropriate protective circuits externally if a failure or abnormality of the equipment may seriously affect related
systems.
Do not use the equipment out of the specified range, as it may fail or catch fire.
Do not under any circumstance to modify or disassemble the equipment, as a failure may be caused, resulting fire or an
electric shock.
Do not use the equipment in ambience of flammable or explosive gases.
Do not use the vacant terminals for wiring.
Do not use a pointed object to operate keys.
Do not turn on the power supply until wiring is fully complete in order to prevent an electric shock, failure or
malfunctioning. For replacing a component connected on the equipment, ensure to turn off the power supply. For
turning back on the power supply, do so after all wiring is complete.
Ensure not to trap heat in the space surrounding the equipment in order to provide sufficient heat release.
Do not put a metal piece or similar inside the equipment. A fire, an electric shock or failure may be caused.
The equipment is designed for instrumentation. For its use in environments of high voltages or intense noises, take
appropriate measures on the side of user's equipment.
The equipment is designed for controlling physical values, such as temperatures, on general industrial facilities. Do not
use it for subjects of control that may seriously affect human life.
Caution
Reminder
Instruction on ground connection
for the equipment with safety
grounding terminals.
Unspecific behaviors
of general users.
Hazard of injury due to high
temperature under specific conditions
Warning
Caution
- 2 -
Improper handling of the equipment
may cause injury or physical damage
on it.
Care should be taken for ensuring
safety.
Hazard of pinched fingers on a
particular portion of the
equipment.
Hazard of injury such as an electric
shock due to disassembling or
modification of the equipment
Hazard of burst under
particular conditions.