ABB 265GS Operating Instruction page 24

Design and function
Fig. 5 : 265A transmitter for absolute pressure (in this diagram, measuring ranges
≤ 400 mbar abs.)
1 Process connection
2 Measuring diaphragm
3 O-ring
4 Measuring capsule
5 Measuring equipment
6 Adjustment electronics
With HART devices, the 4 ... 20 mA output signal can be tested at the "TEST" terminals without
interrupting the signal circuit (this does not apply to fieldbus devices).
Use an ammeter with an internal resistance of < 10 Ω for this purpose. Switch the measuring
device directly into the output circuit for the purpose of configuring or calibrating the transmitter
(measuring the current).
It is possible to attach a tag in order to indicate the measuring points.
The "lower range limit value" and "upper range limit value" parameters can be set using "local"
buttons on the pressure transmitter. If required, these buttons can be locked using the write
protection switch.
The pressure transmitter may be equipped with an LCD display that can be read from the front
(optional, can also be retrofitted). The most important transmitter functions and data can be
externally parameterized and configured using the "local" control unit in conjunction with this
LCD display (see the section "Configuration").
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265Gx, 265Ax
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7 Write protection
8 Span
9 Lower range limit value
10Microprocessor-controlled electronics
11Output / Supply power
12Test instrument
M00036
IM/265Gx/Ax-EN-07