Endress+Hauser Hart Cerabar PMP71B, Руководство по эксплуатации

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Technical data Cerabar PMP71B HART
76 Hauser
Fill fluid Density
1)
kg/m
3
Vegetable oil 920
Inert oil 1900
1) Density of the diaphragm seal fill fluid at 20 °C (68 °F).
The calculation of the operating temperature range of a diaphragm seal system depends
on the fill fluid, capillary length and capillary internal diameter, process temperature and
oil volume of the diaphragm seal. Detailed calculations, e.g. for temperature ranges,
negative pressure and temperature ranges, are done separately in the Applicator
" Sizing Diaphragm Seal ".
A0038925
Oxygen applications (gaseous)
Oxygen and other gases can react explosively to oils, grease and plastics. The following
precautions must be taken:
• All components of the plant, such as the measuring devices, must be cleaned according
to national requirements.
• Depending on the materials used, a certain maximum temperature and a maximum
pressure must not be exceeded for oxygen applications.
Cleaning of the measuring device (not device accessories) is offered as an optional service.
• p
max
: depends on the lowest-rated element, with regard to pressure, of the selected
components: over pressure limit (OPL) of the sensor, process connection (1.5 x PN) or fill
fluid (80 bar (1 200 psi))
• T
max
environment: 60 °C (140 °F)
Standard measuring device (without a diaphragm seal)
• Process connections with internal process isolating diaphragm:
–40 to +125 °C (–40 to +257 °F); 150 °C (302 °F) for max. one hour)
• Process connections with flush mount process isolating diaphragm:
• Thread (ISO228, ASME, metric DIN13) and flanges (EN, ASME, JIS):
–40 to +100 °C (–40 to +212 °F)
• Exceptions with seal supplied (M20 x 1.5, G1/2 DIN3852):
–20 to +85 °C (–4 to +185 °F)
Measuring devices with a diaphragm seal
• Depends on diaphragm seal and fill fluid: –70 °C (–94 °F) up to +400 °C (+752 °F)
• A4 screws of process connection, threaded separator: T
min
–60 °C (–76 °F)
• Observe the maximum gauge pressure and maximum temperature