Endress+Hauser Cerabar M PMC41, Техническая информация

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Cerabar M
Hauser 25
4...20 mA HART, PROFIBUS PA
Operating conditions (installation)
General installation
instructions • The position-dependent zero point shift can be corrected directly at the device by means of a key or a
potentiometer. Diaphragm seals also shift the zero point, depending on the installation position
(
→
see also Page 65, "Installation instructions, diaphragm seal systems" section).
• Hauser offers a mounting bracket for installing on pipes.
→
See also Page 26, "Wall and pipe-
mounting" section.
• The onsite display can be rotated in 90° stages.
• Devices with EHEDG approval: these devices must be installed in accordance with the Hygienic Equipment
Design Criteria to meet the requirements of EHEDG.
• For PMP46, PMP48: see Page 65, "Installation instructions, diaphragm seal system" section.
Measuring arrangement for
devices without a diaphragm
seal – PMC41, PMC45,
PMP41, PMP45 Cerabar M devices without diaphragm seals are mounted as per the norms for a manometer (DIN EN 839-2).
We recommend the use of shutoff devices and siphons. The orientation depends on the measuring application.
Pressure measurement in gases
• Mount Cerabar M with shutoff device above the tapping point so that any condensate can flow into the
process.
Pressure measurement in steam
• Mount Cerabar M with siphon above the tapping point.
The siphon reduces the temperature to almost ambient temperature.
• Fill the siphon with liquid before commissioning.
Pressure measurement in liquids
• Mount Cerabar M with shutoff device below or at the same level as the tapping point.
• Do not mount the device at the following positions:
In the fill curtain, in the tank outlet or at a point in the container which could be affected by pressure pulses
from an agitator or a pump.
Mounting with temperature
isolator Hauser recommends the use of temperature isolators in the event of constant extreme fluid
temperatures which lead to the maximum permissible electronics temperature of +85°C (+185°F) being
exceeded.
Depending on the filling oil used, Cerabar M devices with temperature isolators can be used for maximum
temperatures of up to 260°C (+500°F).
→
For the temperature application limits of filling oils, see Page 60,
"Diaphragm seal filling oil" section.
To minimize the influence of rising heat, Hauser recommends the device be mounted horizontally or
with the housing pointing downwards.
The additional installation height also brings about a zero point shift of maximum 21 mbar due to the
hydrostatic column in the temperature isolator. You can correct this zero point shift.
P01-PMP4xxxx-11-xx-xx-xx-006
–10...+60 °C
(+14 to +140°F)
–40...–10 °C, +60...+85 °C
(-40 to +14°F, +140 to +185°F)
+85...+125 °C (+185 to +257°F)
(only PMP45)
% of URL/10 K
X
⎯ ⎯
•
±
0.08
⎯
X
⎯
•
±
0.1
⎯ ⎯
X •
±
0.12
PMP46, PMP48: the data apply to the transmitter without a diaphragm seal or capillary line.
ma x. 115