Teledyne T200 Operation Manual page 50

Getting Started
ATTENTION
Venting Pressurized Gas:
Dust Plugs:
I
MPORTANT
3.3.2.1. ABOUT ZERO AIR AND CALIBRATION (SPAN) GAS
Note
Note
48
Teledyne API – T200 NO/NO
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
In applications where any gas (span gas, zero air supply, sample gas) is received
from a pressurized manifold, a vent must be provided to equalize the gas with
ambient atmospheric pressure before it enters the analyzer to ensure that the
gases input do not exceed the maximum inlet pressure of the analyzer, as well as
to prevent back diffusion and pressure effects. These vents should be:
• at least 0.2m long
• no more than 2m long
• vented outside the shelter or immediate area surrounding the instrument
Remove dust plugs from rear panel exhaust and supply line fittings before
powering on/operating instrument. These plugs should be kept for reuse in the
event of future storage or shipping to prevent debris from entering the
pneumatics.
Leak Check:
Run a leak check once the appropriate pneumatic connections have been
made; check all pneumatic fittings for leaks using the procedures defined in
Section 11.3.12.1.
Zero air and span gas are required for accurate calibration.
Zero air and span gases must be supplied at twice the instrument's specified
gas flow rate. Therefore, the T200 zero and span gases should be supplied to
their respective inlets in excess of 1000 cc3/min (500 cc3/min x 2).
Z A
ERO IR
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
vapor.
Moderate amounts of NH3 and H2O can be removed from the sample gas stream
by installing the optional sample gas dryer/scrubber (see Section 3.3.2.6).

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 (N2) could be used as a zero gas for applications where NO
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.
/NO Analyzer Operation Manual
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