Between the measuring points, no
vacuum
H
2
≤ 7 m (23 ft), for halocarbon oil, however only H1
≤ 4 m(13.1 ft)
Start of scale value:
p
MA
= ρ
FL
* g * H
U
- ρ
oil
* g * H
V
Full scale value:
p
ME
= ρ
FL
* g * H
O
- ρ
oil
* g * H
V
Legend
p
MA
Start of scale value to be adjusted
p
ME
Full scale value to be adjusted
ρ
FL
Density of the measured medium in the container
ρ
oil
Density of the filling oil in the capillary line of the remote seal
g Local gravitational acceleration
H
U
Start of scale value
H
O
Full scale value
H
V
Gland distance
5.5 Removing
WARNING
Incorrect disassembly
The following risks may result from incorrect disassembly:
- Injury through electric shock
- Risk through emerging media when connected to the process
- Risk of explosion in hazardous area
In order to disassemble correctly, observe the following:
● Before starting work, make sure that you have switched off all physical variables such as
pressure, temperature, electricity etc. or that they have a harmless value.
● If the device contains hazardous media, it must be emptied prior to disassembly. Make
sure that no environmentally hazardous media are released.
● Secure the remaining connections so that no damage can result if the process is started
unintentionally.
Installing/mounting
5.5 Removing
SITRANS P320/P420 (mA/HART)
54 Operating Instructions, 06/2018, A5E44852162-AA
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