TELEDYNE API T300M - Figure 2-20. T300 Pneumatic Connections - Option 50 H: Zero;Span

083730300A DCN8101 Getting Started 47
PRESSURE/SPAN
AIR/IZS
SAMPLE
EXHAUST
VENT/SPAN
Source of
SAMPLE GAS
Removed during
calibration
Calibrated
CO Gas
at span gas
concentration
VENT her e if input
is pressurized
Model 700 gas
Dilution
Calibrator
VENT
Instrument
Chassi s
Exhaust must be vented outside
of shelter or immediate area
sur rounding the instrument.
Figure 2-20. T300 Pneumatic Connections – Option 50H: Zero/Span
SAMPLE GAS SOURCE
Attach a sample inlet line to SAMPLE inlet port. The sample input line should not be
more than 2 meters long.
• Maximum pressure of any gas at the sample inlet should not exceed 1.5 in-Hg above
ambient pressure and ideally should equal ambient atmospheric pressure.
• In applications where the sample gas is received from a pressurized manifold, a vent must
be placed on the sample gas before it enters the analyzer.
CALIBRATION GAS SOURCES
SPAN GAS
• Attach a gas line from the source of calibration gas (e.g. a Teledyne API’s T700E Dynamic
Dilution Calibrator) to the SPAN inlet.
ZERO AIR
• Zero air is supplied internally via a zero air scrubber that draws ambient air through the IZS
inlet.
INPUT GAS VENTING
The zero air supply and sample gas line MUST be vented in order 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 and;
• Vented outside the shelter or immediate area surrounding the instrument.