Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 71)

Model 9100EH Instruction Manual Operating Instructions
SAMPLE RANGE = 500.0 PPB NOX=X.X
< TST TST > CAL SETUP
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SETUP X.X RANGE CONTROL MENU
MODE SET UNIT EXIT
SETUP X.X CONC UNITS: PPM
PPM PPB UGM MGM ENTER EXIT
Select the preferred
concentration unit.
SETUP X.X CONC UNITS: UGM
PPM PPB UGM MGM ENTER EXIT
EXIT returns
to the main
menu.
ENTR accepts
the new unit,
EXIT returns
to the SETUP
menu.
Conversion factors from volumetric to mass units used in the M9100EH:
NO: ppb x 1.34 = µg/m 3 ; ppm x 1.34 = mg/m 3
NO
2
: ppb x 2.05 = µg/m 3 ; ppm x 2.05 = mg/m 3
Concentrations displayed in mg/m 3 and µg/m 3 use 0° C and 760 Torr as standard
temperature and pressure (STP). Consult your local regulations for the STP used by your
agency. EPA protocol applications, for example, use 25° C as the reference temperature.
Changing the units may cause a bias in the measurements if standard temperature and
pressure other than 0°C and 760 Torr are used. This problem can be avoided by recalibrat-
ing the analyzer after any change from a volumetric to a mass unit or vice versa.
CAUTION
In order to avoid a reference temperature bias, the analyzer must be recalibrated
after every change in reporting units.
6.5.7. Dilution Ratio
The dilution ratio is a software option that allows the user to compensate for any dilution of
the sample gas before it enters the sample inlet. Using the dilution ratio option is a 4-step
process:
• Select concentration units: Follow the procedure in Section 6.5.6.
M9110EH Rev 0 57