Emerson Process Management rosemount 3300 series manual ODQJH&RQQHFWLRQRQ1ROHV, Plqgldphwhu

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00809-0100-4811, Rev AA October 2002

Rosemount 3300 Series

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Figure 3-3. Mounting in nozzles

NOZZLE MOUNT V3

+ 81= +

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The transmitter can be mounted in nozzles by using an appropriate flange. It

is recommended that the nozzle size is within the dimensions given in 7DEOH ￿￿￿. For small nozzles it may be necessary to increase the Upper Null

Zone (UNZ) in order to reduce the measuring range in the upper part of the tank. By setting the UNZ equal to the nozzle height, the impact on the

measurement due to interfering echoes from the nozzle will be reduced to a minimum. See also section ³'LVWXUEDQFHV￿DW￿WKH￿WRS￿RI￿WKH￿WDQN³￿RQ￿SDJH ￿￿￿￿.

Amplitude Threshold adjustments may also be needed in this case.

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Except for the Coaxial Probe the probe must not be in contact with the nozzle.

Table 3-4. Minimum nozzle diameter and maximum nozzle height (inch/mm)

'	4(100)	4(100)	> Probe diameter	6(150)	6(150)
'￿￿￿￿	2(50)	2(50)	> Probe diameter	2(50)(3)	2(50)
				1.5(38)(4)

52*=>￿;67￿￿,,￿￿￿￿￿￿￿￿￿*￿9￿￿￿￿￿?￿￿<:￿￿￿6￿￿=￿￿￿￿￿,,￿￿￿!￿￿(6) !￿￿￿&￿￿￿￿￿￿?￿￿￿￿￿￿￿￿￿￿￿￿!￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿,,￿￿￿!￿￿(6)				!￿￿	(6)	4(100) + D	(6)
+	4(100) + D	4(100) + D	-	4(100) + D

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