120-00011 Rev. New
Halimeter
PLUS User Manual
7/15/2020
10
during SENSOR STABILIZING mode.
When the startup timer elapses, the instrument
will automatically enter OFF MODE.
OFF MODE
In OFF MODE, the pump is turned off and the
screen showed on the right will be displayed.
This is the mode the Halimeter
PLUS should
be kept in when powered but not in use. To
advance to ON MODE from OFF MODE, press
the
ENTER
button. To return to the main menu
from OFF MODE, press the
STOP
button.
ON MODE
In ON MODE, the pump is turned on and the
sensor is allowed to stabilize to ambient air flow.
The screen shown on the right will be displayed.
Zeroing of the display is accomplished from ON
MODE (See section 5.1
for more on zeroing).
To advance to SAMPLE MODE from ON
MODE, press the
ENTER
button.
To return to
OFF MODE from ON MODE, press the
STOP
button.
SAMPLE MODE
In SAMPLE MODE, breath samples are taken
and data is stored. Upon entering SAMPLE
MODE, the first of 3 separate breath sample
cycles will begin automatically. Each cycle
consists of a 3-minute stabilization or
“HOLD”
period followed by a 35-second breath
sampling period. Peak ppb values are
displayed at the end of each breath sample period and the average peak value is
displayed at the end of the 3 complete cycles.
