Teledyne 9700 instruction manual Flue Gas Analysis System

Flue Gas Analysis System Operation 4

If, on the other hand, reliable analysis, free of instrument distortion, is required from the very onset of operation, TBE/AI recommends a 24 hour run-in period before operational calibration and service .

In either case, emlploy the following procedure:

(1)Set the analyzer RANGE switch to the 0–25% position. Power has now been applied to the instrument circuitry and to the sample pump.

(2)Rotate the sample-caibration selector valve so that calibration or span gas is being delivered to the analyzer.

Note: When the valve is rotated so that the handle index faces the inside of the case (open port), atmosplleric air is drawn in by the pump and flows through the oxygen analyzer. Be sure that the valve is returned to the sample inlet position after calibration is completed. Never leave the valve in the half-way (closed) position with the pump running.

(3)Allow air to flow through the unit for 3 to 5 minutes.

(4)Unlock and adjust the SPAN control until the meter pointer is

in coincidence with the CAL mark (20.9% O2) on the meter scale. Relock the SPAN control.

(5)Rotate the selector valve so that sample gas is flowing through the analyzer.

(6)Select the range of analysis that will provide the best possible resolution of the oxygen content of the sample gas.

(7)Allow sample gas, not calibration air, to flow through the analyzer for the duration of the equilibration period.

Note: It is particularly vital to the condition of the A-3 cell employed in flue gas (or high CO2 content applications) that the cell not be exposed to a CO2 free environment for a prolonged period of time.

TELEDYNE BROWN ENGINEERING 4-3

Analytical Instruments