6
supplied when purchased, for the user to
program.
Transducer sets are positioned in the guide
rail, to help correctly align the transducer
blocks along the pipe axis. Both the ‘A’ and ‘B’
guide rails have two transducer blocks. One is
fixed and the other is moveable and slides
along the scale to enable the user to set the
separation distance (See figure 4, page 2).
The instrument calculates the separation
distance when the application information has
been entered. The fixed sensor can be
identified because it is slightly longer and has
two connections as opposed to the floating
block only having one connection.
Each guide rail should be mounted on the
surface of the pipe using the hardware
provided. Magnetic attachments are available
as an option with the ‘B’ guide rail.
Transducer set ‘A’
Supplied as standard for use on pipes 13mm
to 89mm inside diameter. After applying the
grease, attach to the pipe using the ball chain
and spring attachment. Magnets are not
available for this guide rail.
Transducer sets ‘B’ and ‘C’
The ‘B’ guide rail is attached to the pipe using
the chains provided. Two types of transducer
block fit into the ‘B’ guide rail. The ‘B’
transducers are used on pipes from 90mm to
1000mm. The ‘C’ transducers measure double
the velocity range of the ‘B’ transducers on
pipes from 300mm to 2000mm inside
diameter. Magnetic attachments are available
to fit onto this guide rail.
Transducer Kit ‘D’
The ‘D’ transducers are for use on pipes from
1000mm to 5000mm, and supplied with their
own guide rail and mounting hardware. They
are aligned in the same way as other
transducer sets (i.e. Reflex or Diagonal mode)
with the separation distance being measured
from the front edge of the block. The
transducers are made from perspex with a
maximum operating range up to +80°C. It is
not necessary or possible to attach the
Prop/Temp cable to the ‘D’ sensors.
Separation Distance
The instrument calculates the separation
distance when all the parameters have been
entered. The fixed transducer must be in
contact with the pipe surface when a
propagation measurement needs to be made.
The next stage is for the second or moveable
transducer to be placed on the pipe, at the
required separation distance. Screw down onto
the pipe surface making sure not to over
tighten, as it may force the fixed sensor off the
pipe wall - finger tight is sufficient!
The separation distance is the distance
between the front edge of each sensor block.
See Figure 3, page 2, for an example in reflex
mode. Connections are made via the IP66
connectors between the sensor block and the
electronics.
Attaching The Transducers
Attach the guide rail to the pipe using the
hardware provided.
Figure 8 – Reflex Mounting Hardware –
Transducer set ‘A’
Figure 9 - Reflex Mounting Assembly -
Transducer sets ‘B’ and ‘C’
