Mounting Instructions - Siemens SITRANS LG260 Operating Instructions Manual

Installation position
Type of vessel
12
the process conditions in chapter "Technical data" of the operating
instructions or on the type label.
Hence make sure before mounting that all parts of the instrument ex-
posed to the process are suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
Process fitting
•
Process seal
Process conditions in particular are:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasion and mechanical influences
4.2

Mounting instructions

Mount SITRANS LG260 in such a way that the distance to vessel
installations or to the vessel wall is at least 300 mm (12 in). In non-
metallic vessels, the distance to the vessel wall should be at least
500 mm (19.7 in).
During operation, the probe must not touch any installations or the
vessel wall. If necessary, fasten the probe end.
In vessels with conical bottom it can be advantageous to mount the
sensor in the center of the vessel, as measurement is then possible
nearly down to the lowest point of the bottom. Keep in mind that
measurement all the way down to the tip of the probe may not be pos-
sible. The exact value of the min. distance (lower dead zone) is stated
in chapter "Technical data" of the operating instructions.
Fig. 2: Vessel with conical bottom
Plastic vessel/Glass vessel
The guided microwave principle requires a metallic surface on the
process fitting. Therefore, in plastic vessels, etc., use an instru-
ment version with flange (from DN 50) or place a metal sheet
(ø > 200 mm/8 in) beneath the process fitting when screwing it in.
Make sure that the plate has direct contact with the process fitting.
SITRANS LG260 - Operating Instructions PBD-51041061