Page 12 - Shimadzu AA-7800 Series

Any User

Safety Technology for Flame AA Systems Simple and Easy-to-Use Furnace System

˙ Automatic Flame Extinguishing Function by Vibration Detection Sensor Replacing the Graphite Tube is Easy
A built-in sensor automatically extinguishes the flame when it detects vibration. That eliminates any worry in the event of an Furnace measurements require replacing the graphite
earthquake or other major shaking. tube. Thanks to the simple furnace structure, even
first-time users can replace the tube easily using a
specialized positioning jig. It is also easy to differenti-
ate between using different graphite tubes ideal for
given measurement applications.

Graphite Tube Positioning Jig Replacing the Graphite Tube

The device detects vibrations and automatically digests flames.
Automatic flame extinguishing Selecting the Graphite Tube
˙ Multi-Mode Automatic Gas Leak Check Function Pyro-coated graphite tube High-density graphite tube Platform tube
(P/N 206-50588-11) (P/N 206-50587-12) (P/N 206-50887-02)
If the power supply is ON and the flame is extinguished, this function automatically checks for gas leakage from fuel gas lines
Effective for elements that readily form Effective for low-boiling point elements Restricts chemical interference due to
inside the system’s gas control unit. If a gas leak occurs, an alarm sound is emitted and a warning is displayed in the window. carbides (Ni, Fe, Cu, Ca, Ti, Si, V, Mo, etc.). (Cd, Pb, Na, K, Zn, Mg, etc.). coexisting substances. Effective for the
analysis of environmental samples and
biosamples, such as sea water and
industrial waste.
˙ Automatic Flame Ignition and Extinguishing * Depending on the state of the sample, some other combinations may be appropriate.
The flame can be ignited or extinguished easily. Flashback is prevented by an Air-C2H2 flame priority ignition system.
˙ Automatic Air-N2O Switching Mechanism with Acetylene Flowrate Monitor
Once the Air-C2H2 flame is ignited, it automatically switches to an N2O-C2H2 flame. If C2H2 levels do not increase, due to a GFA-TV Graphite Furnace Camera (Optional)
solenoid valve problem, for example, then flashback is prevented by not switching to the support gas.
The camera can be used to confirm the sample injection position or sample drying status, which is helpful when evaluating or
optimizing the temperature program. The sharp image clearly shows the status inside the graphite tube.
˙ Acetylene Regulator Failure Detection Mechanism
Even if the acetylene gas cylinder regulator fails, this mechanism detects the abnormally high gas pressure to protect the
system by preventing the acetylene inlet solenoid valve from opening.

˙ Flashback Prevention by Pressure Monitor ˙ Automatic Gas Shutoff by Flame Monitor

˙ Instantaneous Power Interruption Detection ˙ Burner Misuse Prevention Mechanism
Mechanism and Safety System for Reigniting Flame

˙ Drain Tank Level Monitor

˙ Flame Retardant Materials Used ˙ Ignition Switches Designed for Safety GFA-TV Checking the Sample Injection Position Checking the Drying Status
Flame retardant materials (UL standard: 94V-0) are The switches are shaped to fit fingers and are
used for outer cover of the main unit and the located near the window. The mechanism is
atomizer. Outstanding design achieved while designed so that ignition requires pressing
ensuring safety. two switches simultaneously, which eliminates
the worry of accidental operation. Safety Technology for Furnace AA Systems
ɾ Cooling Water Flow Rate Monitor ɾ Argon Gas Pressure Monitor ɾ Furnace Block Cooling Check
˙ Tubing Parts with High Durability ˙ Clear Window ɾ Overcurrent Preventive Mechanism (Double-Checked by Circuit Protector and Optical Sensor)
and Joints with High Reliability Used The flame status can be checked via a large
window and the large opening provides easy
Tubing parts selected based on durability are
accessibility to the burner unit. Also, the window
connected using joints with high reliability.
closes automatically when released, so there is
no risk of forgetting to close the window.

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