Page 13 - Shimadzu AA-7000

Safety Functions for Flame-Specification Instruments
World first! –– flame extinguished automatically by vibration sensor
The flame is automatically extinguished when the new built-in sensor detects vibrations.
Instruments are completely safe during severe shaking caused by earthquakes.

Multimode automatic gas leak check
The fuel gas pipes inside the instrument gas controller are automatically
checked for gas leaks when the power is turned on and when the flame is
extinguished. Should a gas leak be detected, a warning buzzer sounds and a
warning is displayed on the screen.

Automatic flame ignition and extinguishing
Flame ignition and extinguishing operations are extremely simple. The
Air-C2H2 flame priority ignition mechanism prevents flashback.

Automatic Air-N2O switching system with acetylene flow-rate monitor
After the ignition of an Air-C2H2 flame, the flame automatically switches to
an N2O-C2H2 flame.
If the C2H2 flow rate does not increase due to solenoid valve trouble, for
example, switching to the support gas is disabled to prevent flashback.
The connected options and operation of safety mechanisms are
checked during instrument initialization.
Pressure monitor prevents flashback Automatic gas shut-off by flame monitor
Sudden power interruption detection and re-ignition safety measures Mechanism to prevent misuse of the burner
Drain tank level monitor

Safety Functions for Furnace-Specification Instruments

Cooling water flow rate monitor Argon gas pressure monitor Furnace cooling check
Overcurrent protection unit (double-checked by circuit protector and optical sensor)

Safety-Conscious Design
Flame-retardant materials Safe ignition switches
UL 94V-0-rated flame-retardant materials The switches perfectly fit finger contours and are positioned
are used for the instrument external near the window.
covers and atomizer unit. This superior To prevent inadvertent operation, both switches must be
design pays due consideration to safety. pressed simultaneously to start ignition.

Durable pipes and reliable couplings Clear window
All pipes are selected for durability and The large window permits observation of the flame, and the
used with highly reliable couplings. burner can be easily accessed through the large opening.
The window closes when released to eliminate the chance
of it being left open.

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