Siemens 7MF8.23 Series - Page 13

SITRANS P300 (7MF8.23.. 7MF8.24.. 7MF8.25..)
A5E03434759-01, 08/2011
13
Note
Protect the transmitter from:
● Direct heat
● Rapid temperature changes
● Severe soiling
● Mechanical damage
● Direct sunlight
NOTICE
The enclosure may only be opened for maintenance, local operation or to make electrical connections.
The installation location is to be as follows:
● Easily accessible
● As close as possible to the measuring point
● Vibration-free
● Within the permitted ambient temperature values
Installation configuration
The transmitter can only be used in non-pressurized vessels for level.
Installation height
0(
0$
S
K
R
K
X
Level of non-pressurized vessel
Formula:
Zero point: p
MA =
ρ · g · H
U
Full-scale value: p
ME =
ρ · g · H
O
MA Zero point Δp
MA
Limit point to be adjusted
ME Limit point Δp
ME
Limit point to be adjusted
p Pressure ρ Density of the measured medium in the
container
h
U
Start-of-scale value g Acceleration due to gravity
h
O
Full-scale value
Note
Select the height of the container flange for recording of the transmitter (
measuring point ) such that the lowest level to be
measured is always over the flange or at its upper edge.