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Teledyne API - T100 UV Fluorescence SO2 Analyzer EPA Protocol Calibration
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10.5. DYNAMIC MULTIPOINT SPAN CALIBRATION
Dynamic calibration involves introducing gas samples of known concentrations to an
instrument in order to record the instruments performance at a predetermined sensitivity
and to derive a calibration relationship. A minimum of three reference points and one
zero point uniformly spaced covering 0 to 90 percent of the operating range are
recommended to define this relationship.
The analyzer's recorded response is compared with the known concentration to derive
the calibration relationship.
To perform a precision check, the instrument set up, sources of zero air and sample gas
should conform to those described in Section 9.2.
Fo
llow the procedures described in Section 9.2 for calibrating the zero points.
For each
mid point:
Wait until
STABIL falls
below 0.5 ppb.
This may take
several minutes.
SAMPLE STABIL=X.XXX PPB SO2 =XXX.X
< TST TST > CAL CALZ CALS SETUP
Record the SO
2
reading as
displayed on the
instrument’s front
panel
ACTION:
Allow calibration gas diluted to proper concentration for
Midpoint N to enter the sample port
SAMPLE RANGE = 500.000 PPB SO2 =XXX.X
< TST TST > CAL SETUP
SAMPLE STABIL=X.XXX PPB SO2 =XXX.X
< TST TST > CAL SETUP
Set the Display to show the
STABIL test function.
This function calculates the
stability of the SO
2
measurement
SPAN CAL M RANGE = 500.0 PPB SO
2
XXX.X
< TST TST > ZERO SPAN CONC EXIT
ACTION:
Allow Calibration Gas diluted to
proper concentration for
Midpoint N+1 to enter the sample
port
Press EXIT to
Return to the
Main SAMPLE
Display
Figure 10-1: Dynamic Multipoint Span Calibration
06807C DCN6650