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２．IMPORTANT INSTRUCTION FOR THE SAFETY
２−１．Danger items
２−２．Warning items
This is not a explosion proof unit. Do not use it at hazardous area. Operation under such environment is very
dangerous.
DANGER
・ Detector head
Do not connect other detector head than designated combustible gas detector head.
If connected, you can not detect gas. Furthermore, this unit or other connected unit may be broken.
・ Power source
Before supplying the power, confirm that the power source is a designated voltage.
・ Necessity of protective grounding
Do not cut inside or outside wire for earth, nor disconnect the wire from earth terminal.
In any case, the unit becomes dangerous conditions.
・ Defect of protective function
Do not operate the unit if protective functions such as protective grounding or fuse are seems to be defective.
Also, before operating the unit confirm that there is no defect for protective functions.
・ Fuse
Use the designated rating (current, voltage, type) fuse to prevent fire.
Replacement of fuse shall be done after put off the initial power source and put off the power switch of this unit.
Do not use other fuse than designated one, nor make short circuit for fuse holder.
・ External connections
After making protective grounding firmly, connect to external control circuit or detection objective.
・ Responding to gas alarm
When detect high concentration gas than preset alarm level, it is very dangerous.
It is required to take an appropriate measures by customerʼs decision.
・ Operation in gaseous atmosphere
Do not operate this unit in an atmosphere where combustible/explosive gases or vapors may exist since
this is a non-explosion proof unit.
WARNING
