Cerabar M, Deltabar M, Deltapilot M Installation
Endress+Hauser 17
4.5.2 Installation instructions for devices with diaphragm seals –
PMP55
• Cerabar M devices with diaphragm seals are screwed in, flanged or clamped, depending on
the type of diaphragm seal.
• Please note that the hydrostatic pressure of the liquid columns in the capillaries can cause
zero point shift. The zero point shift can be corrected.
• Do not clean or touch the process isolating diaphragm of the diaphragm seal with hard or
pointed objects.
• Do not remove process isolating diaphragm protection until shortly before installation.
Improper handling!
Damage to the device!
‣ A diaphragm seal and the pressure transmitter together form a closed, oil-filled
calibrated system. The fill fluid hole is sealed and may not be opened.
‣ When using a mounting bracket, sufficient strain relief must be ensured for the
capillaries in order to prevent the capillary bending down (bending radius 100
(3.94 in)).
‣ Please observe the application limits of the diaphragm seal filling oil as detailed in the
Technical Information for Cerabar M TI00436P, "Planning instructions for diaphragm
seal systems" section.
In order to obtain more precise measurement results and to avoid a defect in the device,
mount the capillaries as follows:
‣ Vibration-free (in order to avoid additional pressure fluctuations)
‣ Not in the vicinity of heating or cooling lines
‣ Insulate if the ambient temperature is below or above the reference temperature
‣ With a bending radius of 100 mm (3.94 in).
‣ Do not use the capillaries as a carrying aid for the diaphragm seals!
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