WIKA PG43SA-S Betriebsanleitung Seite 13

5. Commissioning, operation
5.3 Mounting instructions for instruments with EHEDG and 3-A
Observe the following instructions, especially for EHEDG-certified
and 3-A-compliant instruments.
To maintain the EHEDG certification, one of the EHEDG-recom-
„
mended process connections must be used. These are marked
with the logo in the data sheet.
To maintain the conformity to the 3-A standard, a 3-A-compliant
„
process connection must be used. These are marked with the
logo in the data sheet.
Mount the instrument with minimal dead space and able to be
„
cleaned easily.
The mounting position of the instrument, welding socket and
„
instrumentation T-piece should be designed to be self-draining.
The mounting position must not form a draining point or cause a
„
basin to be formed.
With the process connection via an instrumentation T-piece, the
„
branch L of the T-piece must not be longer than the diameter D of
the T-piece (L ≤ D).
Special instructions for in-line versions
In-line access units (e.g. VARINLINE
„
T-pieces in horizontal pipes should be installed with a slight pipe
inclination for self-draining.
With in-line access units (e.g. VARINLINE
„
from the manufacturer and observe their installation instructions.
The welding sockets shall comply with EHEDG documents doc.
„
9 and doc. 35. With TIG welding, the surface quality must be Ra ≤
0.8 µm. The weld seams must be free from defects on the wetted
and non-wetted contact sides and must be butt welded.
For tank-mounted pressure measuring instruments the tank clean-
„
ing devices shall be positioned in such a way that the instrument
can be assessed and is perfectly cleaned.
WIKA operating instructions pressure gauge, PG43SA-S, PG43SA-C
) and instrumentation
®
), use the original seals
®
EN
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