Teledyne 2750 - Portable turbine generator gas analzyer - Manual (Page 25)

Turbine Generator Gas Analyzer Installation
Teledyne Analytical Instruments 25
9. After successfully zeroing with CO
2
on the two ranges (air/CO
2
and H
2
/CO
2
) close the sample valve and disconnect the
CO
2
source. Replace with 100% air source. Make sure that the
pressure regulator is set at approximately 5 psig.
CAUTION: ALWAYS HAVE THE SAMPLE FLOW VALVE CLOSED
WHEN TURNING ON THE SAMPLE (OR CALIBRATION)
GAS SOURCE. FLOW RATES GREATER THAN 2.5
SCFH CAN DAMAGE THE SENSOR.
10. Allow the air to flow through the analyzer. Wait several minutes
before making any flow adjustments. Then set the gas flow to
0.5-1 SCFH using the flow control valve.
11. Set the calibration switch to the H
2
/air position and verify the
range selector is on H2/air. See Figure 3-6
Figure 3-6: Cal Switch in H2/AIR Position
12. Use the H
2
/air zero trim pot to zero that range by adjusting the
pot until the display reads zero. See Figure 3-7
Figure 3-7: H2/AIR Zero Trimpot