PMC21 datasheet(23/48 Pages) EH

23 / 48 page

Cerabar PMC11, PMC21, PMP11, PMP21

Endress+Hauser

Installation

Installation conditions

• Moisture must not penetrate the housing when mounting the device, establishing the electrical

connection and during operation.

• Point the cable and connector downwards where possible to prevent moisture from entering (e.g.

rain or condensation water).

Influence of the installation

position

Any orientation is possible. However, the orientation may cause a zero point shift i.e. the measured

value does not show zero when the vessel is empty or partially full.

A0024708

Type

Process isolating

diaphragm axis is

horizontal (A)

Process isolating diaphragm

pointing upwards (B)

Process isolating diaphragm

pointing downwards (C)

PMP11

PMP21

Calibration position, no

effect

Up to +4 mbar (+0.058 psi)

Up to –4 mbar (–0.058 psi)

PMC11, PMC21

< 1 bar (15 psi)

Calibration position, no

effect

Up to

+0.3 mbar (+0.0044 psi)

Up to

–0.3 mbar (–0.0044 psi)

PMC11, PMC21

≥1 bar (15 psi)

Calibration position, no

effect

Up to +3 mbar (+0.0435 psi)

Up to –3 mbar (–0.0435 psi)

Mounting location

Pressure measurement

Pressure measurement in gases

Mount the device with shutoff device above the tapping point so that any condensate can flow into

the process.

A0021904

Device

Shutoff device

Pressure measurement in vapors

For pressure measurement in vapors, use a siphon. The siphon reduces the temperature to almost

ambient temperature. Mount the device with a shutoff device at the same height as the tapping

point.

Advantage:

only minor/negligible heat effects on the device.

Note the max. permitted ambient temperature of the transmitter!

PMC21 Datasheet(PDF) 23 Page - Endress+Hauser Group Services AG

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