Dynamic Multipoint Calibration Check - Teledyne 400E Instruction Manual

Model 400E Ozone Analyzer
Instruction Manual
For each midpoint:
WAIT 10
MINUTES
Or until the
reading
stabilizes and
the SPAN button
is displayed
Plot the analyzer responses versus the corresponding calculated concentrations to
obtain the calibration relationships. Determine the straight line of best fit
(y = mx + b) determined by the method of least squares (e.g., see Appendix J of
Volume I of the Q.A. Handbook
After the best-fit line has been drawn, determine whether the analyzer response is
linear. To be considered linear, no calibration point should differ from the best-fit
line by more than 2% of full scale.

8.4. Dynamic Multipoint Calibration Check

The EPA-prescribed calibration procedure is based on photometric assays of O
concentrations in a dynamic flow system. It is based on the same principles that
the M400E uses to measure ozone. The theory is covered in Section 10 of this
manual.
Since the accuracy of the calibration standards obtained by this calibration
procedure depends entirely on the accuracy of the photometer, it is very important
that the photometer is operating properly and accurately. The fact that the
photometer makes a ratio measurement (I/I
measurement eases this task.
P/N 04316 Rev: B
ACTION:
Allow Calibration Gas diluted to
proper concentration for Midpoint N
SAMPLE RANGE = 500.0 PPB
CALS
< TST TST > CAL CALZ
ZERO CAL M RANGE = 500.0 PPB
< TST TST > ZERO SPAN CONC
6
).
EPA Protocol Calibration
O3 =XXX.X
SETUP
Record the O
reading as
displayed on the
O3 =XXX.X
instrument's front
panel
EXIT
Press EXIT to
Return to the
Main SAMPLE
Display
Allow Calibration Gas diluted to
proper concentration for
) rather than an absolute
o
3
ACTION:
Midpoint N+1
3
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