Greyline Portaflow PT400, Руководство пользователя

Страница: 11 / 47

Page 11 www.greyline.com
2.2 Transducer Attachment
The transducers are fitted to adjustable guide rails which are secured to the pipe using wrap-around chains and
mechanically connected together by a steel separation bar. The separation bar also acts as a ruler to allow the
distance between the transducers to be accurately set to the value determined by the Portaflow instrument.
When fitting the guide rails it is easiest to assemble them onto the separation bar and adjust to the required
separation distance before attaching them to the pipe.
2.2.1 Preparation
1. Before you attach the transducers you should first ensure that the proposed location satisfies the
distance requirements shown in Figure 2.1 otherwise the resulting accuracy of the flow readings may be
affected.
2. Prepare the pipe by degreasing it and removing any loose material or flaking paint in order to
obtain the best possible surface. A smooth contact between pipe surface and the face of the transducers is
an important factor in achieving a good ultrasound signal strength and therefore maximum accuracy.
2.2.2 Attaching the guide rails
Figure 2.2 Guide rail attachment
1. Slide the separation bar (D) into the front of the left hand guide rail, align the front edge of the
guide rail with ‘0’ on the ruler scale (E) and secure it in place by tightening the thumbscrew (C).
2. Slide the other end of the separation bar into the front of the right hand guide rail, align the front
edge of the guide rail to the required separation distance (obtained from the Portaflow instrument) on the
ruler (F), then secure it in place by tightening the thumbscrew.
A
B
C
D
E
F
G
A: Tensioning thumb-wheel.
B: Tension bar.
C: Separation bar securing
screw.
D: Separation bar.
E: Ruler scale (0).
F: Set Separation distance.
G: Securing chain.