Teledyne 9110T - Nitrogen Oxides Analyzer - Manual (Page 80)

Model 9110T NOx Analyzer Getting Started
Teledyne Analytical Instruments 80
VERIFYING THE EXPECTED NO
X
AND NO SPAN GAS CONCENTRATION
I
MPORTANT I MPACT ON R EADINGS OR D ATA
Verify the PRECISE Concentration Value of the SPAN gases
independently.
If you supply NO gas to the analyzer, the values for expected NO and
NO
x
MUST be identical.
The NO
x
and NO span concentration values automatically defaults to 400.0 PPB and it is recommended
that calibration gases of that concentration be used for the initial calibration of the unit.