Model 106-H Ozone Monitor Manual Rev. D-2
10
for example, where the most recent average value of ozone computed is 3.53 wt% O
2
(note, because of character limits, only “wt” is displayed), the time of the measurement
is 3:07 p.m. and the date is 19 July 2017.
Note that entering the menu will interrupt the averaging interval that is in progress,
and the averaging interval will start over when the menu is exited and measuring is
resumed.
Averaged data may be logged, thereby greatly extending the length of time that the
internal data logger can be used (see next section).
3.6.2
To Log Data
Data may be logged in the internal data logger. Up to 32,736 data lines containing log
number, ozone concentration, internal (cell) temperature, internal (cell) pressure,
reference photodiode voltage, sample photodiode voltage, date, and time may be
stored in internal memory. Measurement output of 2 s, and averaging options of 10 s,
1 min, 5 min and 1 hr may be selected from the menu (see below), thereby allowing
the instrument to operate and log data for 18 hours, 3.8 days, 22.7 days, 113 days
and 3.7 years, respectively, before filling the memory.
To begin logging data, select the
Dat
submenu from the Admin Menu using the Select
switch. The display will now show
Dat Menu
Xmt Log End
To start logging data, rotate the Select switch to move the cursor to
Log
and click to
select the logging mode. You will then receive the prompt:
Overwrite Data?
No Yes
Warning: If you start logging, all data previously stored in the logger will be
irretrievably lost.
If you have data in the logger that you want to keep, be sure to
download it (see Section 3.14 below) before starting logging.
Click on
Yes
if you are sure you want to start logging new data. This will return you to
the
Dat
submenu. Click on
to return to the Admin Menu, click on
again to reach
the Main Menu, and click on
again to exit the Main Menu and start making
measurements. Note that “
” always takes you up one level in the menu.
When data are being logged, the log number and number of new measurements
made for the next average (minus 1) are displayed in place of the data and time; e.g.,
Avg O3= 3.53 wt
Log= 193:4
where
Avg O3
is the average ozone value most recently written to the logger, and the
current log number is 193.
(Note that when the average is displayed, the units are
truncated. Refer to the instantaneous reading for the full units of wt% O
2
, wt% air,
g/m
3
, etc.)
The “4” in 193:4 refers to the number of 2-s data points that have been
