Page 10 of 24
V2.0
II. Basic Operation
Six control keypads are used to operate the instrument:
,
RUN/STOP
,
ENTER
,
BACK
,
,
. Each button controls the following features:
•
Power button
: While the unit is off, press and hold the power button for
approximately 2 seconds to turn on the instrument. While the unit is on, press and
hold the power button for approximately 2 seconds to turn off the instrument. If the
instrument is not taking measurements it will automatically power off after 5 minutes
of inactivity.
•
RUN/STOP
: Start or stop measuring/sampling.
•
: Move the cursor to select desired screen or item.
•
ENTER
: Confirm the current selection, enter a parameter, or save the current
sampling value.
•
BACK
: Change the concentration unit while the unit is measuring or return from the
current selection.
The side of the enclosure includes
•
USB Interface: Connect the USB interface to a computer for data downloading or data
logging.
•
POWER port: An AC adapter plug-in port: 5 VDC @ 1 A.
•
Charge Status LED: LED flashes during charge cycle and becomes steady after the
charge cycle is finished.
2.1 Measuring Screen
The Measure screen, shown in
, is the main screen of the instrument as it is used
for sampling formaldehyde. The Indicator Display in the upper left corner shows immediate
information about the sample time, sound options, and alarm settings of the instrument. As
