9
４．HOW TO USE
４ − １ ． Before operation
Be sure to keep cautional items of use not only for first user but for already experienced staff.
If not keep these cautional items, the unit may be defective and correct gas detection may not
be performed.
４ − ２ ． Mounting/dismounting procedures
When mounting/dismounting indicator/alarm unit and buzzer unit for RM-590 series, make following
procedures.
（１）Mounting method
・Open the front cover of indicator/alarm unit and buzzer unit.
・Confirm that the power switch is at OFF
・With the disengagement lever at down position, mount into the case.
（Confirm that the edge connector is put in firmly）
・Confirm that the disengagement lever is turned upward when indicator/alarm unit and buzzer
unit are mounted into the case firmly.
・After confirmation of lever position, put ON the power switch, and then, close the cover.
（２）Removal of the unit
・Open the front cover of indicator/alarm unit and buzzer unit.
・Confirm that the power switch is at OFF.
・Push disengagement lever down to release the lock.
・Pull out the unit from the case.
・Turn the lever upward and close the cover.
Mounting/dismounting of indicator/alarm unit and buzzer unit
shall be done according to the above procedures. If not,
stopping metal of the unit may be transformed and the cover can
not be closed.
CAUTION
