Model 202 Ozone Monitor Manual Rev. J-4
11
clockwise or counterclockwise to move the cursor under the first letter of one of the
other submenus. To select a particular submenu, move the cursor under the first
letter of the submenu and click (press in) the Select button. To exit the Main Menu
and begin making measurements again, select and click on the right arrow (
).
3.9.
To Log Data Using the Internal Data Logger
Select the
Dat
submenu from the Main Menu using the Select button. The display will
now show:
Data Menu
Xmt Log End SD
To start logging data using the internal data logger, rotate the Select switch to move
the cursor to
Log
and click to select the logging mode. You will then be asked
whether you want to overwrite the data stored in the logger:
Overwrite Data?
No Yes
If you select yes and start logging, all data previously stored in the logger will be
irretrievably lost.
Caution: If you have data in the logger that you want to keep, be sure to download it
before starting logging.
If you are ready to start logging, then select
Yes
by moving the cursor under
Yes
and
clicking. Either selection will return you to the
Main Menu
. To start data acquisition,
select
and click.
The Ozone Monitor will then alternately display every five seconds: 1) the ozone
measurement and log number and 2) the ozone measurement, internal temperature,
and internal pressure. For example, the display might read:
O3= 56.7 ppb
T=305.6 P=730.4
where the ozone value is the most current ozone measurement, and T and P are the
cell temperature and pressure (in units of K and torr, in this case). After 5 seconds
(midway between the next 10-s measurement cycle), the display will be replaced by:
O3= 56.7 ppb
Log= 193:0
where
O3
is the ozone value most recently written to the logger, and the log number is
193.
If averaging has been selected (see
To Average Data
, Section 3.13), then the above
display will be replaced by:
Avg O3=56.7 ppb
Log= 193:4
