Zero Air; Calibration (Span) Gas - Teledyne T200 User Manual

The method for performing an initial calibration for the analyzer differs between the
standard instrument and those with options.
• See Section 4.2.1 for instructions for initial calibration of the analyzer in its base
configuration.
• See Section 4.2.2 for information regarding setup and calibration of the analyzer with
Z/S Valve options.
Note
Z A
ERO
Zero air or zero calibration gas is similar in chemical composition to the measured medium
but without the gas to be measured by the analyzer. For the T200, this means zero air should
be devoid of NO, NO
Note
If your application is not a measurement in ambient air, the zero calibration gas should
•
be matched to the composition of the gas being measured.
• Pure nitrogen (N
measured in nitrogen.
If your analyzer is equipped with an external zero air scrubber option, it is capable of
•
creating zero air from ambient air.
For analyzers without the external zero air scrubber, a zero air generator such as the
•
Teledyne API's Model T701 can be used. Please visit the company website for more
information.
C
ALIBRATION
Calibration gas is specifically mixed to match the chemical composition of the type of gas
being measured at near full scale of the desired reporting range. To measure NO
analyzer, it is recommended that you use a span gas with an NO concentration equal to
80% of the measurement range for your application.
EXAMPLE:
• If the application is to measure NO
appropriate span gas would be 400 ppb.
• If the application is to measure NO
appropriate span gas would be 800 ppb.
92 Teledyne API T200 NO/NO
Zero air and span gases must be supplied at twice the
instrument's specified gas flow rate. Therefore, the zero and span
gases should be supplied to their respective inlets in excess of
1000 cc/min (500 cc/min x 2).
IR
, CO , NH or H
2 2 3
Moderate amounts of NH
sample gas stream by installing the optional sample gas
dryer/scrubber (see Section 2.3.2.6).
) could be used as a zero gas for applications where NO
2
(S ) G
PAN AS
/NO Analyzer with NumaView™ Software
2 x
O vapor.
2
and H O can be removed from the
3 2
in ambient air between 0 ppb and 500 ppb, an
X
in ambient air between 0 ppb and 1000 ppb, an
X
is
X
with the
X
083730200A DCN7962