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Model GFC7000E Instruction Manual Operating Instructions
04584 Rev A1 62
6.7.6. Range Units
The MGFC7000E can display concentrations in parts per billion (10
9
mols per mol, PPB), parts per
million (10
6
mols per mol, PPM), micrograms per cubic meter (µg/m
3
, UG), milligrams per cubic
meter (mg/m
3
, MG) or percent (volume CO
2
/volume sample gas, %). Changing units affects all of
the display, analog outputs, COM port and iDAS values for all reporting ranges regardless of the
analyzer’s range mode.
NOTE
Concentrations displayed in mg/m3 and ug/m3 use 0°C, 760 mmHg for Standard
Temperature and Pressure (STP). Consult your local regulations for the STP used by
your agency.
Conversion factors from volumetric to mass units are:
CO
2
: ppb x 1.96 = µg/m3; ppm x 1.96 = mg/m3
To change the concentration units:
SETUP X.X
CONC UNITS: %
PPM PPB
UGM
MGM %
ENTER EXIT
SAMPLE RANGE = 500.00 PPB CO2=X.XXX
< 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
SAMPLE
ENTER SETUP PASS : 818
8 1 8 ENTR EXIT
Select the preferred
concentration unit.
EXIT returns
to the main menu.
ENTR
accepts
the new unit,
EXIT
returns
to the
SETUP
menu.
NOTE
Once the units of measurement have been changed the unit MUST be recalibrated, as
the “expected span values” previously in effect will no longer be valid. Simply entering
new expected span values without running the entire calibration routine is not
sufficient.