Table 13-3: T200 Gas Flow Rates - Teledyne T200 Operation Manual

Teledyne API – T200 NO/NO
SAMPLE
GAS INLET
EX HA UST
GAS OUTLET
PUMP
Critical
Flow
Orifice's
Figure 13-7:

Table 13-3: T200 Gas Flow Rates

Location
Sample gas inlet of reaction cell
O supply inlet of reaction cell
3
Dry air return of Sample dryer
Vacuum manifold, Auto Zero port.
Vacuum manifold, Internal span gas
generator exhaust port
06858E DCN7057
/NO Analyzer Operation Manual
2 X
Converter
Orifice Dia.
0.010"
Orifice Dia.
0.004"
OZONE DRYER
Location of Flow Control Assemblies & Critical Flow Orifices
Controls rate of flow of sample gas into the
reaction cell.
Controls rate of flow of ozone gas into the
reaction cell.
Controls flow rate of dry air return / purge
air of the dryer.
Controls rate of sample gas flow when
bypassing the reaction cell during the Auto
Zero cycle.
Controls rate of flow of zero purge gas
through the optional Internal span gas
generator when it is installed.
The necessary 2:1 ratios across the critical flow orifices is largely exceeded by the
pumps supplied with the analyzer which are designed to accommodate a wide range of
possible variability in atmospheric pressure and age related degradation of the pump
itself. Once the pump does degrade the ratio between sample and vacuum pressures
may fall to less than 2:1. At this point, the instrument will display an invalid sample
flow rate measurement (XXXX).
NO/NO
X
VALVE
NO
COM
NC
NO
2
AUTOZERO
VALVE
NO
NC
O
3
COM
Cleanser
Orifice Dia. Orifice Dia.
0.010" 0.004"
PMT
Purpose
Principles of Operation
FLOW PRESSURE
SENSOR PCA
SAMPL E VACUUM
PRESS URE PRESS URE
SENSO R SENSO R
O FLOW
3
SENSO R
O
3
GENERATOR
O
3
Destruct
INSTRUMENT CHASSIS
Flow rate
Orifice
Diameter
(nominal)
0.010" (0.25 mm) 500 cm³/min
0.004" (0.10 mm) 80 cm³/min
0.004" (0.10 mm) 80 cm³/min
0.010" (0.25 mm) 500 cm³/min
0.003" (0.10 mm) 60 cm³/min
295