Model 405 nm NO
2
/NO/NO
x
Monitor Manual Rev. D
23
d
Turns the LCD backlight on.
f
Turns the LCD backlight off.
p
Performs the LED test.
i
Adaptive filter - Change Difference (ppb).
q
Adaptive filter - Percent (%).
k
Adaptive filter - Long Average (number of points).
m
Adaptive filter - Short Average (number of points).
h
Output the serial header.
?
Output this help menu.
x
Exits the serial menu.
Status Byte
The current measurement mode can be determined from the status byte in each serial
data line. The following describes all combinations of the status byte and the
corresponding measurement mode:
80 = Measuring NO
2
and NO
10 = Measuring NO
2
20 = Measuring NO
81 = Measuring NO
2
and NO Zero
11 = Measuring NO
2
Zero
21 = Measuring NO Zero
