Teledyne T300, Operation Manual, Page: 72 / 426

Getting Started Teledyne API – Model T300/T300M CO Analyzer
70
3.3.2.7. PNEUMATIC CONNECTIONS FOR ZERO SCRUBBER/PRESSURIZED SPAN OPTION
Source of
SAMPLE GAS
Removed during
calibration
VENT
Calibrated
CO Gas
at span gas
concentration
(Adjust to 30
psig)
VENT
here if input
is pressurized
PRESSURE SPAN
ZERO AIR
SAMPLE
EXHAUST
VENT SPAN
Instrument
Chassis
Figure 3-25: Pneumatic Connections – Zero Scrubber/Pressurized Span Calibration Valves (Opt 50E)
S
AMPLE
G
AS
S
OURCE
Attach a sample inlet line to the 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.
C
ALIBRATION
G
AS
S
OURCES
S
PAN
G
AS
:
•
Attach a gas line from the pressurized source of calibration gas (e.g. a bottle of
NIST-SRM gas) to the span inlet.
•
Span gas can by generated by a T700 Dynamic Dilution Calibrator.
Z
ERO
A
IR
:
•
Zero air is supplied internally via a zero air scrubber that draws ambient air through
the ZERO AIR inlet.
I
NPUT
G
AS
V
ENTING
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.
A similar vent line should be connected to the VENT SPAN outlet on the back of the
analyzer.
06864B DCN6314