Pneumatic Connections: Basic Configuration; Figure 2-13. Gas Line Connections For The T400 Analyzer - Basic Configuration - Teledyne T400 User Manual

C
ALIBRATION
Span gas is specifically mixed to match the chemical composition of the type of gas
being measured at near full scale of the desired measurement range. Because ozone (O
quickly breaks down into molecular oxygen (O
in precisely calibrated bottles like other gases.
If the T400 analyzer is not equipped with the optional internal zero air generator (IZS), an
•
external O
Also, some applications, such as EPA monitoring, require multipoint calibration checks
•
where Span gas of several different concentrations is needed.
In either case, we recommend using a Gas Dilution Calibrator such as a TAPI Model T700
•
with internal photometer option.
In the case of O
it is recommended that you use a span gas with an O
reporting range for your application.
EXAMPLE:
If the application is to measure between 0 ppm and 500 ppb, an appropriate span gas
•
would be 450 ppb.
If the application is to measure between 0 ppb and 1000 ppb, an appropriate span gas
•
would be 800 ppb.

2.3.2.1 PNEUMATIC CONNECTIONS: BASIC CONFIGURATION

MODEL 701
Generator
calibrator is not already vented
Figure 2-13. Gas Line Connections for the T400 Analyzer – Basic Configuration
083730400A DCN8130
(S ) G
PAN AS
generator capable of supplying accurate O
3
measurements made with the Model T400 photometric ozone analyzer,
3
VENT
here if input
is pressurized
Gas Dilution
Calibrator
Zero Gas
VENT
here if output of
Teledyne API – Model T400 O
), this calibration gas cannot be supplied
2
calibration mixtures must be used.
3
concentration equal to 90% of the
3
Source of
SAMPLE GAS
Removed during
calibration
SAMPLE
EXHAUST
Instrument Chassis
SPAN
ZERO AIR
DRY AIR
Analyzer
3
)
3
39