Teledyne 402REU - Hydrocarbon analyzer - Manual (Page 29)

Total Hydrocarbon Analyzer Operations
4-5 Teledyne Analytical Instruments
2. Set the zero gas tank regulator to 30 psig (or a pressure
which matches the sample pressure) and adjust the instrument
sample regulator until its (sample) pressure gauge reads the
recommended sample pressure (except that zero gas is
flowing rather than sample). See Figure 4-2.
3. Adjust the bypass flow to 0.3-1.0 SCFH.
4.5.3 Span Gas
1. Set the gas selector valve to the SPAN position.
2. Set the span gas tank regulator to 30 psig or to match the
sample pressure.
3. Observe that the instrument sample pressure gauge still
reads the recommended sample pressure and that the bypass
flowmeter reads from 0.5 to 1.0 SCFH.
Figure 4-2: Setting the Air, Fuel and Sample Pressure