MAGEE Scientific AE33 User Manual page 19

Aethalometer
Model AE33
AIR PUMP
The air pump pumps the measured air through the inlet connector, directly to the
measurement chamber. It is one of the main components in the system.
FLOWMETERS
Two flow-meters measure the airflow in different points in the system. One of them is used
also in the air flow regulation loop.
SOLENOID VALVES
Three solenoid valves are used to switch the airflow trough different airflow paths when the
instrument is set in different operating modes like measure, tape advance or similar.
CHAMBER LIFT MECHANISM
The chamber lift mechanism allows the measurement chamber to be lifted manually or
electromechanically. During tape advance the automated chamber lift procedure is invoked.
During tape replacement the manual chamber lift procedure can be engaged. The manual
chamber lift mechanism features also a special locking mechanism which simplifies the tape
replacement or chamber cleaning procedure. The main electronic components of the chamber
lift mechanism are the stepper motor and the chamber lift position sensor.
TAPE ADVANCE MECHANISM
The advance mechanism allows the instrument to perform automatic tape advances during
measurements. The main electronic parts of the tape advance mechanism are a stepper motor
and the two tape sensors.
ROLL-ON and UN-ROLL TAPE SPOOLS
The roll-on and the un-roll tape spools hold the measurement tape. During automated tape
advance the tape unrolls from the un-roll spool and rolls on the roll-on spool. If the un-roll
____________________________________________________________________________________________________________
User's manual – Ver. 1.53 July 2015 19/75