Model 9060Z Manual
Probes can be mounted at any angle. However, if the probe is to be mounted on a vertical duct wall, it is better to angle the probe (approx. 15°) down to avoid process condensation inside the cold end of the probe. If there are any particulates in the flue gas, a filter can be omitted by pointing the probe vertically downwards. Otherwise the transmitter can be configured to automatically purge the filters,
or they can be replaced periodically.
Oxygen Probe Mounting
CAUTION
It is important that there is no air in leakage upstream of the oxygen sensing point otherwise there will be a high oxygen reading.
If the probe is to be installed on a bend in the flue, it is best located on the outer circumference of the bend to avoid dead pockets of flue gas flow. While the standard 9060 probe with a ‘U’ length of 250 mm (10”) will suit most low temperature flue applications, it is occasionally necessary to have a longer probe with the sensing tip in the centre of the flue gas stream.
Although it is rare, occasionally a probe may sense oxygen vastly differently from the average reading in the flue gas. If it occurs, then the probe should be moved, or a longer probe installed. This phenomenon is normally caused by stratification of the flue gas.
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