UFM-50 Doppler Flowmeter
SENSOR COUPLING
For permanent or temporary bonding, the following
is
recommended:
Super Lube
®
(supplied)
Additional supply: order
U-F-M acoustic couplant, art. nr.
10030260
or your local home
improvement store.
The above are arranged in their order of preferred application.
c & d are only good for temporary bonding at room temperature.
DO NOT USE: Silicon RTV caulking compound (silicon rubber).
Use the PC4 pipe clamp (supplied) as illustrated on the
previous page. Apply
acoustic coupling paste
to the
coloured face of the sensor. A bead, similar to toothpaste
on a toothbrush, is ideal. Do not overtighten (crush the
sensor).
The sensor must be fixed securely to the pipe with coupling material
between the sensor face and the pipe. Sensor installation with
excessive coupling compound can result in gaps or voids in the
coupling and cause errors or loss of signal. Insufficient coupling
compound will create similar conditions.
Over time temporary coupling compounds (e.g. Petroleum Gel) may gradually sag away from the sensor
resulting in reduced signal strength and finally complete loss of signal. Warm temperatures, moisture
and vibration will accelerate this process.
Couplants
as supplied with the
U
FM
-50
(and available from
U-F-M
or home improvement stores) is recommended for semi-permanent installations.
P.
25
