
Teledyne API – T101 Operation Manual EPA Protocol Calibration
195
7.5. DYNAMIC MULTIPOINT SPAN CALIBRATION
Dynamic calibration involves introducing gas samples of known concentrations to an
instrument in order to record the instrument’s 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 6.2.
Follow the procedures described in section 6.2 for calibrating the zero points.
For each mid point:
SPAN CAL M RANGE = 500. 0 PPB SO2X. XXX
< TST TST > ZERO SPAN CONC EXIT
Wait unt il
SO2 STB falls
below 0.5 pp b.
This may take
several minutes.
SAMPLE SO2 STB=X.XXX PPB SO2 =X.XXX
< TST TST > CAL CALZ CALS SETU P
Record the SO2
reading as
displayed on the
instrument’s front
panel
Press EXIT to
Return to the
Main SAMPLE
Display
ACTI ON:
Allow Calibration Gas diluted to
proper con centra tion for
Midpoint N+1 to enter the sample
port
A
CTION:
Allow cal ibra tion gas di luted t o proper concent ration f or
Midpoin t N to ente r the samp le port
SAMPLE* RANGE = 500.000 PPB SO2 =X.XXX
< TST TST > CAL SETUP
SAMPLE SO2 STB =X.XXX PP B SO2 =X.XXX
< TST TST > CAL SETUP
Set the Display to show the
SO2 STB test function.
This fu nction calcula tes the
stabi lity of the SO2
measu rement
07266B DCN6485