Schmidt SS 20.700, Инструкция по эксплуатации

Страница: 6 / 36

Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.700 Page 6
3 Mounting instructions
General information on handling
The flow sensor SS 20.700 is a precision instrument with high measuring
sensitivity. In spite of the robust construction of the sensor head, soiling of
the sensor elements can lead to distortion of measurement results (see
also chapter
8 ).
During procedures such as transport, installation or dismounting of the
sensor that facilitates soiling as well as represent a mechanical load on
the sensor head, it is generally necessary to attach the enclosed protec-
tive cap of
SCHMIDT Technology to the sensor head and remove it only
during operation.
To avoid soiling and mechanical stress on the sensor head, the
protective cap should be placed over it during transport or instal-
lation.
Mounting method
The sensor SS 20.700 can be mounted only by means of a compression
fitting which supports the sensor tube and ensures frictional clamping. The
compression fitting as well as a pressure protection kit is included in the
scope of delivery.
Due to the variety of applications the compression fitting exists in different
versions. On the one hand they are determined by the design of the ex-
ternal thread (order option: G½ or R½), on the other hand by the materials
and properties of the sealing:

Standard: O-Ring (NBR)

Oxygen (O
2
): O-Ring (FKM, BAM approved)

Grease-free: Clamping ring (stainless steel)
Systems with overpressure
The SS 20.700 is designed for a maximum working pressure of 16 bar.
As long as the medium to be measured is operated with overpressure,
make sure that:

There is no overpressure in the system during mounting.
Mounting and dismounting of the sensor can be carried out
only as long as the system is
in a depressurized state .

Only suitable pressure-tight mounting accessories are used.

Appropriate safety measures are installed to avoid unintended discard-
ing of the sensor due to overpressure. If other accessories than the
delivered pressure protection kit or alternative mounting solutions are
used, the customer must ensure the corresponding safety measures.