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M300EU OPERATING INSTRUCTIONS M300EU
Addendum to M300E/EM Manual P/N 04288
6.3.6. SETUP Æ RNGE Æ UNIT: SETTING THE REPORTING RANGE UNIT
TYPE
The M300EU can display concentrations in ppb, ppm, ug/m
3
, mg/m
3
units. Changing units affects all of the COM
port values, and all of the display values for all reporting ranges.
To change the units of measure press:
SETUP X.X CONC UNITS:PPB
PPB PPM UGM MGM ENTR EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SAMPLE RANGE=50.000 PPM CO= XXXX
<TST TST> CAL SETUP
SETUP X.X RANGE MODE MENU
MODE SET UNIT EXIT
Toggled these keys to
select the units of
measure for the
reporting ranges
EXIT discards the new
setting
ENTR accepts the
new setting
NOTE
Concentrations displayed in mg/m
3
and ug/m
3
use 0°C , 760 mmHg for Standard Temperature and
Pressure (STP).
Consult your local regulations for the STP used by your agency.
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.
The following equations give approximate conversions between volume/volume units and
weight/volume units:
CO ppb x 1.25 = CO ug/m
3
CO ppm x 1.25= CO mg/m
3
28 05831 Rev. 01