Download Model 42i NOx- User Manual

Operation
Calibration Menu
CALIBRATION:
>CAL NOx BACKGROUND
CAL NOx COEFFICIENT
CALIBRATE PRESSURE
ZERO/SPAN CHECK
RANGE
AVG
CALIBRATION:
>CAL NOx BACKGROUND
CAL HI NOx COEFFICIENT
CAL LO NOx COEFFICIENT
CALIBRATE PRESSURE
DIAGS ALARM
Calibrate NOx Background
RANGE
AVG
DIAGS ALARM
The Calibrate NOx Background screen is used to adjust the background, or
perform a “zero calibration”. Be sure the analyzer samples zero air until the
readings stabilize. The display shows the current NOx reading.
It is important to note the averaging time when calibrating. The longer the
averaging time, the more precise the calibration will be. For the most precise
calibration, use the 300-second averaging time. For more information about
calibration, see Chapter 4, “Calibration”.
•
In the Main Menu, choose Calibration > Calibrate NOx Background.
•
Press
to set the new reading to zero.
NOx BACKGROUND:
NOx:
CURRENTLY:
3.4
0.0 ?
ƒ SET NOx TO ZERO
RANGE
Calibrate NOx Coefficients
AVG
DIAGS ALARM
The span calibration screens are used to adjust the NOx span concentrations
while sampling span gas of known concentration.
The display shows the current NOx concentration reading and the current
NOx range. The next line of the display is where the NOx calibration gas
concentration is entered.
Thermo Fisher Scientific
Model 42i NOx Instruction Manual
3-23