Operating Instructions

11
4 Mounting
VEGAPULS C 21 • Two-wire 4 … 20 mA/HART
58341-EN-191014
4 Mounting
4.1 General instructions
The instrument is suitable for standard and extended ambient condi-
tions acc. to DIN/EN/IEC/ANSI/ISA/UL/CSA 61010-1. It can be used
indoors as well as outdoors.
Note:
For safety reasons, the instrument must only be operated within the
permissibleprocessconditions.Youcannddetailedinformationon
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tting
•
Process seal
Process conditions in particular are:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasionandmechanicalinuences
4.2 Mounting versions
For a rigid mounting, a mounting bracket with opening for thread
G1½, e.g. from the VEGA product range, is recommended. The
mounting of the sensor in the bracket is carried out via a G1½ counter
nut of plastic. Take note of chapter "Mounting instructions" for the
recommended distance to the wall.
> 200 mm
(7.87
")
Fig. 5: Mounting via a mounting bracket
4.3 Mounting instructions
The emitted radar impulses of the radar sensor are electromagnetic
waves. The polarisation is the direction of the electrical wave compo-
nent. By turning the instrument in the mounting strap, the polarisation
canbeusedtoreducetheeectsoffalseechoes.
Ambient conditions
Process conditions
Mounting bracket
Polarisation