YOKOGAWA vigilantplant DPharp EJX Series, Руководство пользователя

Страница: 22 / 56

IM 01C25H01-01E 4-3
4. INSTALLATION
IMPORTANT
The transmitter should be installed at least 600
mm below the high pressure (HP) process
connection to ensure a positive head pressure of
fill fluid. Pay special attention to vacuum applica-
tions. If it can not be installed at least 600 mm
below the HP process connection, please use
the equation below:
h=
⫻
7.5
⫻
10
–3
[mm]
(P–P0)
⫻
dHg
ds
h: Vertical height between the HP process
connection and the transmitter (mm)
h
≤
0: Install the transmitter at least h (mm)
below the HP process connection
h>0: Install the transmitter at most h (mm)
above the HP process connection
P: Pressure in the tank (Pa abs)
P0: Minimum working pressure limit of the
transmitter (Pa abs)
If the ambient temperature range is
–10 to 50
°
C.
2951 (Wetted parts material code SW,
SE and SY)
3185 (Wetted parts material code TW)
4573 (Wetted parts material code HW)
3810 (Wetted parts material code UW)
ds: Specific gravity of fill fluid (at 25
°
C), refer to
table 8.1 on section 8.1 Standard Specifi-
cations.
dHg:Specific gravity of the Mercury 13.6
(at 25
°
C)