Model 306 Ozone Calibration Source Manual Rev. G-1
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This process is repeated until the target concentrations are set for all of the steps in
your program. These steps may span the full range of the instrument, from 0 to 1000
ppbv, if desired.
This program resides in memory until the next time you choose to change it.
4.2.3 Scheduler Submenu
Choosing the
Sch
submenu from the
Cfg
menu, allows one to schedule a once-daily
execution of the step program defined in Section 4.2.2. This could be used, for
example, to carry out a daily autocalibration of an ozone monitor. Choosing
Sch
results in the following submenu:
Sch Menu
Auto Cal Hr = x
where x is the time (hour) to commence the step program, in military units (24 =
midnight). To turn off the scheduler
function, use the select switch to scroll to “OFF.”
Important: After setting the scheduler hour, the user needs to power cycle the Model
306 off and back on, and leave it in the warm-
up menu (it reads “temp set press
select
” when the photolysis chamber is at temperature). If not left in this state, the
scheduled step program will not run.
4.2.4 Date/Time Submenu
From the
Cfg
menu, select the
D/T
submenu. The display will read, for example:
D/T:
14:32:21
17/10/2016
meaning that it is 21 seconds after 2:32 p.m. on October 17, 2016 (military time and
European date). To change a number in the date and time, rotate the Select switch to
underline the numeral you want to change. A single click then causes a blinking
cursor to cover that numeral. The number can then be changed by rotating the Select
switch. Once the number is correct, click on the Select switch to turn off the blinking
cursor. You may now rotate the Select switch to choose another numeral to change.
Once the time and date is correct, clicking on
will set the internal clock to that time
and return the display to the
Cfg
menu. As in setting a digital watch, the seconds
should be set in advance of the real time since the clock starts to run again only when
the set time is entered; in this case by clicking on
.
4.3
Ozone Menu (O3)
You may choose to output a constant ozone concentration by choosing
O3
from the
main menu. Upon clicking on
O3
, the following submenu will appear:
Select Amount
O3= xxxx
You may change the desired target ozone concentration by selecting xxxx and
rotating the select switch to choose a value. To start producing that concentration of
ozone, click on
. The instrument will now output the selected concentration of
