Ultraflux UF 801-P, Руководство пользователя

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In case of turbulent to laminar flow transition risk (very rare with water), we
give some complementary recommendations in Expert menu.
5.3 Probes Coupling :
Clean the pipe at location for the probes : take into account the probe
distance and consider also the distance for the probe support or ruler.
This cleaning can be done simply with a paper tissue or an old cloth piece. If the
pipe is very dusty, use a metallic brush.
No need to remove good paintwork .
If paintwork is flaking off , remove it with a brush or a scrapper: the air gap
under the paint will stop ultrasonic transmission.
Use the right gel for actual conditions . Blue Gel is for ambient temperature
and temporary measurements. In wet or rainy conditions, it could be better to use
grease (electro-mechanical).
Spread some gel over the measurement points and apply gel on each
probe face .
Attach probes to the pipe with straps or better use the probe support.
Ensure the gel interface between each probe and the pipe is continuous .
Avoid slipping the probe: this may break the coupling film.