Pneumatic Operation; Sample Gas Flow; Figure 10-7: Model 300E Pneumatic Operation - Teledyne 300E Instruction Manual

Model 300E Carbon Monoxide Analyzer
Instruction Manual

10.2. Pneumatic Operation

10.2.1. Sample Gas Flow

.
From Sample
To
Exhaust Port
An internal pump evacuates the sample chamber creating a small vacuum that
draws sample gas into the analyzer. Normally the analyzer is operated with its inlet
near ambient pressure either because the sample is directly drawn at the inlet or a
small vent is installed at the inlet. There are several advantages to this "pull
through" configuration.
P/N 04288 Rev: A
It is important that the sample airflow system is both leak tight and not
pressurized over ambient pressure.
Regular leak checks should be performed on the analyzer as described in the
maintenance schedule, Table 9-1.
Procedures for correctly performing leak checks can be found in Section 9.5.
Port
PUMP

Figure 10-7: Model 300E Pneumatic Operation

CAUTION
Filter
Sample Chamber
Critical Flow
Orifice
THEORY OF OPERATION
Pressure Sensor
(Sample Pressure)
Flow Sensor
(Sample Flow)
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