Teledyne API - Model T200H/T200M Operation Manual
Operating Instructions
95
4.8. SETUP
RNGE: RANGE UNITS AND DILUTION
CONFIGURATION
This Menu is used to set the units of measure to be associated with the analyzer’s
reporting ranges (see Section 4.13.4.2 for more information on reporting ranges vs.
physical ranges) and for instruments with the sample gas dilution option operating, to set
the dilution ratio.
4.8.1. RANGE UNITS
The T200H/M can display concentrations in parts per million (10
6
mols per mol, PPM)
or milligrams per cubic meter (mg/m
3
, MGM). Changing units affects all of the display,
COM port and DAS values for all reporting ranges regardless of the analyzer’s range
mode. To change the concentration units:
SAMPLE
A1:NXCNC1= 100.0 PPM
NOX=XXX.X
< TST TST > CAL
SETUP
SETUP X.X
PRIMARY SETUP MENU
CFG DAS
RNGE
PASS CLK MORE
EXIT
SETUP X.
RANGE CONTROL MENU
UNIT
DIL
EXIT
SETUP X.X
CONC UNITS: PPM
PPM
MGM
ENTER
EXIT
Select the preferred
concentration unit.
SETUP X.X
CONC UNITS: MGM
PPM 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 T200H/M:
NO: ppm x 1.34 = mg/m
3
NO
2
: 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 recalibrating the analyzer after any change from a volumetric to a mass unit
or vice versa.
Note
In order to avoid a reference temperature bias, the analyzer must be recalibrated
after every change in reporting units.
07270D DCN7141