Environmental Express AutoBlock II - Manual (Page 40)

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Section 8: AutoBlock Safety Features
Your AutoBlock is designed with numerous safety features. Although these safety
features are well designed, there can be situations not addressed by safety
features and/or AutoBlock safety features may fail. Therefore always use caution
when operating the AutoBlock, and never operate the AutoBlock without properly
trained personnel nearby.
Following is a partial list of AutoBlock safety features. Many of these features
are discussed in greater detail in other sections of the manual. If an alarm
activates and you have concerns, contact technical support at Environmental
Express.
(1) Pressure Sensor
A pressure sensor is located in the digestion chamber. During digestions
this sensor continually monitors air pressure inside the chamber. If the
acrylic door is opened or if the exhaust fan quits functioning properly, the
pressure sensor will cause an alarm to sound.
(2) Leak detector
A leak detector is located near the pump and splitter in the rear of the
AutoBlock. Should a leak occur in this compartment, an alarm will sound,
and the digestion method will be aborted. To reset the leak detector, it
must be free of liquids. Dry the metal screen with a hair drier. It may be
necessary to disassembly the screens and dry them if acid or other higher
temperature liquids have entered the area. Add 20 ml of DI in the manual
mode (to the drain) while inspecting the detector area for any leaking
liquids. If the alarm sounds again inspect carefully. A fine mist will cause
the alarm to go off. It may not be a drip or spray. Fix any leaking parts.
See figure 1 and figure 2 at the end of the manual for re-assembly of the
leak detector (page 44-45).
(3) Overheat Shutoff
Should the AutoBlock overheat, it will automatically shut off.
(4) PDA disconnect alarm
If the PDA is removed from the PDA cradle while ON, it will sound an
alarm.
(5) Abort button
The Abort button can be used anytime during a method to stop the
AutoBlock.