Teledyne Microscope & Magnifier GFC7000E 用户手册
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.
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.