Important Information About Calibration Gases - Teledyne T400 User Manual

ATTENTION
Maximum Pressure:
Ideally the maximum pressure of any gas at the sample inlet should equal
ambient atmospheric pressure and should NEVER exceed
1.5 in-hg above ambient pressure.
Venting Pressurized Gas:
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
Dust Plugs:
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.
IMPORTANT
Run a leak check once the appropriate pneumatic connections have been
made; check all pneumatic fittings for leaks using the procedures
defined in Section 5.6.3.
See Figure 2-2 and Table 2-2 for the location and descriptions of the various pneumatic
inlets/outlets referenced in this section.
2.4.1.1

IMPORTANT INFORMATION ABOUT CALIBRATION GASES

Zero air and span gas are required for accurate calibration.
Z A
ERO IR
Zero air is a gas that is similar in chemical composition to the earth's atmosphere but
scrubbed of all components that might affect the analyzer's readings. If your analyzer is
equipped with an Internal Zero Span (IZS) or an external zero air scrubber option, it is
capable of creating zero air. For analyzers without an IZS or external zero air scrubber
option, a zero air generator such as the Teledyne API Model T701 can be used.
38
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
instrument.
Teledyne API – Model T400 O
LEAK CHECK
Analyzer
3
083730400A DCN8130