Teledyne T300, Руководство по эксплуатации, Страница: 109 / 426

Teledyne API – Model T300/T300M CO Analyzer Setup Menu
107
5.4.4. RANGE UNITS
The T300/T300M can display concentrations in parts per million (10
6
mols per mol,
PPM) or milligrams per cubic meter (mg/m
3
, MG). Changing units affects all of the
display, COMM port and DAS values for all reporting ranges regardless of the
analyzer’s range mode. To change the concentration units:
The following equations give
approximate conversions
between volume/volume units
and weight/volume units:
CO
CO ppb x 1.25 = CO ug/m
3
CO ppm x 1.25 = CO mg/m
3
SAMPLE RANGE=50.0 PPM CO=XX.XX
<TST TST> CAL SETUP
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
SETUP X.X RANGE MODE MENU
MODE SET UNIT DIL EXIT
SETUP X.X RANGE MODE:SNGL
SNGL DUAL AUTO ENTR EXIT
Toggle these buttons
to select the units of
measure for the
reporting ranges.
EXIT discards the new
setting.
ENTR accepts the
new setting.
I
MPORTANT
I
MPACT ON
R
EADINGS OR
D
ATA
In order to avoid a reference temperature bias, the analyzer must be
recalibrated after every change in reporting units.
I
MPORTANT
I
MPACT ON
R
EADINGS OR
D
ATA
Concentrations displayed in mg/m3 and ug/m3 use 0
° C
and 760 mmHg for
Standard Temperature and Pressure (STP). Consult your local regulations
for the STP used by your agency.
(Example: US EPA uses 25
o
C as the reference temperature).
Once the Units of Measurement have been changed from volumetric (ppb or
ppm) to mass units (µg/m3 or mg/m3) the analyzer 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.
This will also counteract any discrepancies between STP definitions.
06864B DCN6314