OPERATION
2 - 15
2.7 Integrated Sampling Pump
The UltraRAE Compound Specific PID monitor includes an
integrated sampling pump. This is a diaphragm type pump that
provides 400-500 cc per minute flow rate (with no tube in
place). Connecting a 1/4 inch Tygon tubing with 1/8 inch
inside diameter to the gas inlet port of the UltraRAE, this pump
can pull in air sample from 200 feet away horizontally, or 90
feet vertically, at 3 feet per second flow speed.
The pump is turned on when a measurement is manually started
by the operator and turns off automatically at the completion of
the sample.
If liquid or other objects are pulled into the inlet port filter,
causing the pump to stall, the monitor will detect the
obstruction and shut down the pump immediately. The alarm
will be activated and a flashing error message “Pump” will be
also displayed on the LCD display.
The user needs to acknowledge the pump shut off condition by
clearing the obstruction and pressing the
[Y/+]
key to re-start
the pump.
