16 266CRH / 266CRT, 266CSH / 266CST MULTIVARIABLE PRESSURE TRANSMITTER | OI/266CXX/MODBUS-EN REV. A
6 Installation
Mounting
Before installing the pressure transmitter, check whether the
device design meets the requirements of the measuring point
from a measurement technology and safety specifications point
of view.
This applies in respect of the:
• Measuring range
• Overload resistance
• Temperature
• Explosion protection
• Operating voltage
The suitability of the materials must be checked as regards their
resistance to the media.
This applies in respect of the:
• Gasket
• Process connection, separating diaphragm, etc.
In addition, the relevant directives, regulations, standards, and
accident prevention regulations must be observed (e. g.,
EN 61140, EN 61010, IEC 60364, EN 60079-14, DIN 19216,
VDI/VDE 3511 Bl.5, etc.).
Measurement accuracy is largely dependent on correct
installation of the transmitter and, if applicable, the associated
impulse line(s).
As far as possible, the measuring setup should be free from
critical ambient conditions such as large variations in
temperature, vibrations, or shocks.
Note
If unfavorable ambient conditions cannot be avoided for reasons
relating to building structure, measurement technology, or other
issues, the measurement quality may be affected.
If a remote seal with capillary tube is installed on the
transmitter, the additional operating instructions for remote
seals and the related data sheets must be observed.
IP rating
The housing of the 266CRH / 266CRT, 266CSH / 266CST
pressure transmitters satisfies the requirements of IP degree of
protection IP 66 / IP 67 (NEMA 4X) in accordance with IEC 60529.
The first digit indicates the protection of the integrated
electronics against penetration of foreign objects, including
dust.
• The digit ‘6’ means that the housing is dust tight
(for example dust cannot penetrate).
The second digit indicates the protection of the integrated
electronics against the penetration of water.
• The digit ‘6’ means that the housing is watertight and can
even withstand a strong water jet under the specified
conditions.
• The digit ‘7’ means that the housing is watertight and can be
temporarily immersed at a specified pressure and for a
specific time, without water penetrating.
Factory settings
The pressure transmitter is factory configured according to the
customer’s order specifications.
Under normal conditions no additional settings are required.
The typical configuration includes:
• Number of the measuring point tag
• Calibrated span
• Configuration of the flow or liquid level calculation
• Configuration of the LCD display
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