Dwyer PUX - Manual (Page 32)

7 - 3
7.2 Selection of detector
(1) Selection of mounting methods
There are 2 methods for mounting the detector; V method and Z method. For the mounting space, see
the following sketch.
Employ the Z method in the following cases.
• Mounting space need be saved (mounting space of the Z method is about one half of the V
method's).
• Turbid fluid such as sewage is to be measured.
• Pipe has mortar lining.
• A thick film of scale may have been formed on the inner surface of pipe because it is old.
(2) Detector selection standards
The Z method for large size sensor is recommended for outer diameter 300mm or more.
PSX2 D should be used as much as possible for pipes such as old pipes, cast iron pipes, and mortar
lining pipes, through which it is difficult for ultrasonic signals to pass.
Length of frame of each sensor
Frame
Length of frame of each sensor
L L
L: Mounting dimension
mounting dimension for
sensor displayed on the
SITE SETUP screen
D D
Detector
L=About D
V method
Detector
D
L=About D/2
Z method
V method Z method
Mounting method
Type Diameter Temperature
PSX2 B 13 100mm (V method) -40 +100
°
C
-40 +100
°
C
-40
+200
°
C
-40 +80
°
C
Detector
PSX2 A/E
50 350mm (V method)
300 400mm (Z method)
PSX2 HT
50 350mm (V method)
PSX2 D
200 3000mm (V method)
200
6000mm
(Z method)
300 400mm (Z method)
BULLETIN F-68