Model 405 nm NO
2
/NO/NO
x
Monitor Manual Rev. D
13
4.2. To Start Logging Data
Select the
Dat
submenu from the Main Menu using the Select switch. The display will
now show:
Data 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 be asked whether you want to overwrite the
data stored in the logger:
This will overwrite
all existing data.
Are you sure?
No Yes
If you select yes and 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 before restarting 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
Dat Menu
. To start data acquisition,
select
and click to return to the main
Menu
and the select
to begin making
measurements.
When measurements resume, the display might read:
NO2= 34.8 ppb
---------------------------------------------
LOG=193:0
Tsc=112
14:49
04/07/2015
where the
NO2
(or
NO
) is the most current measurement of that species,
LOG
is the
current log number (193 in this case),
Tsc
is the temperature of the NO
2
scrubber, the
time of the measurement is 14:49 (2:49 pm on 24-hr clock) and the date is 7 July 2015
(European style).
The “0” in “193:0” refers to the number of 5-second data points that
have been measured so far for inclusion in the next average to be displayed and
logged
(in this case, “0” is displayed because no averaging has been selected). After
5 seconds, as an example, the display will be replaced by:
NO2= 33.7 ppb
-----------------------------
CF=1525 O3F=75
T=35.2 P=985.7
