Configuration
50 265Gx, 265Ax IM/265Gx/Ax-EN-07
7.3 Configuring the parameters without an LCD display
The "Lower Range Value" and "Process Variable" parameters can be set directly on the
transmitter using the buttons. The transmitter has been calibrated by the manufacturer based on
the order information. The name plate contains information on the "Lower Range Value" and
"Upper Range Value" set.
In general, the following applies:
The 1st pressure value (e.g., 0 mbar) is always assigned to the 4 mA signal, while the 2nd
pressure value (e.g., 400 mbar) is always assigned to the 20 mA signal.
To reset the transmitter, apply the pressure for the "lower range value" and "upper range value"
to the measuring equipment. Make sure that the measuring limits are not exceeded.
IMPORTANT (NOTE)
Reducing stations with adjustable pressure and reference displays can be used as pressure
generators.
When making the connection, please ensure that there are no residual fluids (for gaseous
testing materials) or air bubbles (for fluid testing materials) in the connection lines, since these
can lead to errors during inspection.
Any potential measuring error for the pressure generator should be at least three times smaller
than the desired measuring error for the transmitter.
It is recommended that the damping is set to zero using the button and LCD display, or the
graphical user interface (DTM). The set time constant must be known for this purpose.
IMPORTANT (NOTE)
In the case of the 265A transmitter for absolute pressure with measuring ranges of ≤ 400 mbar
abs., please be aware that the measuring equipment will have been overloaded by the
atmospheric pressure due to the long periods of transport and storage involved. For this
reason, you will need to allow a starting time of approx. 3 hours after commissioning, until the
sensor has stabilized to such an extent that the specified accuracy can be maintained.
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