Model 306 Ozone Calibration Source Manual Rev. G-1
15
To stop data collection, press and hold in the Select switch on the Model 306
(alternatively, type
n
from the terminal emulator; see Section 5.2 below).
If you have a problem with your instrument, please collect a data file and email it to 2B
Technologies at
along with a description of the problem.
5.2
Operating the Instrument Remotely via the Serial Menu
The serial menu and serial commands can be used to control the functionality of the
Model 306 remotely. Establish the serial connections as noted in Section 5.1 above.
Start your terminal emulator (e.g., Tera Term or Hyperterminal) and when the
instrument temperature is set, you will be prompted to press “
Enter
” to access the
serial menu. (If your instrument is already generating a
serial data stream, enter “
n
”
and then “
Enter
” from the keyboard to access the serial menu.)
The following list describes the commands available through the serial menu interface:
run step
Starts the stored step program
output ozone
Continuous output of ozone selected
(prompts user to enter desired ozone concentration)
n
Skips to next concentration while running step,
or
Exits continuous output of ozone and enters hibernation mode
set lslope
Prompts user to enter new low slope (
≤ 300 ppb) in format x.xx
set hslope
Prompts user to enter new high slope (>300 ppb) in format x.xx
set lzero
Prompts user to enter new low zero
(in units of ppbv)
set hzero
Prompts user to enter new high zero
(in units of ppbv)
set steps
Prompts user to enter step program
(# of steps, time/step, concentration in ppbv for each step)
set hr
Prompts user to enter the hour that the step program will start each
day
(military time format, 24 = midnight; 0 to disable). Must set
instrument to hibernate (or power cycle the instrument) to execute
the step program at the new hour.
set time
Prompts user to enter time of day
(military format)
set date
Prompts user to enter date
(European format)
hibernate
Pump off, lamp off, maintains temperature control with heater on,
valve open to sample air
(waits for wakeup through serial port or select switch)
hibernate -nt
Pump off, lamp off, heater off, valve open to sample air
(waits for wakeup through serial port or select switch)
v
Adjusts the valve to allow calibration air from Model 306 into stream.
c
Adjusts the valve to allow sample air from sample inlet into stream.
l
Turns LCD backlight ON
o
Turns LCD backlight OFF
header
Describes the values in the serial data output
?
Displays this menu
x
Exits the serial menu.
