Pressure Equipment Directive (Ped) (2014/68/Eu); Devices With Ps >200; Devices With Ps ≤200 Bar; Mounting A Dp Sensor Transmitter (266Dsh/266Mst/ 266Rst/266Drh/266Mrt/266Rrt) - ABB 266 HART Series Operating Instruction

5.4 Pressure Equipment Directive (PED) (2014/68/EU)

5.4.1 Devices with PS >200
Devices with a permissible pressure PS >200 bar have been
subject to a conformity validation. The data label includes the
following specifications: Pressure Equipment Directive (PED)
(2014/68/EU).
Figure 5: 266 nameplate with PED data
5.4.2 Devices with PS ≤200 bar
Devices with a permissible pressure PS ≤200 bar correspond
to article 3 paragraph (3). They have not been subject to a
conformity validation. These instruments were designed and
manufactured acc. to SEP Sound Engineering Practices.
5.5 Mounting a DP sensor transmitter (266DSH/
266MST/266RST/266DRH/266MRT/266RRT)
The pressure transmitter models 266DSH, 266MST and
266RST can be mounted directly on the manifold. A mounting
bracket for wall or pipe mounting (2" pipe) is also available as
an accessory. For models 266DRH, 266MRT and 266RRT
always mounting brackets should be used. Ideally, the pressure
transmitter should be mounted in a vertical position to prevent
subsequent zero shifts.
If the transmitter is installed inclined with respect to the
Important.
vertical, the filling liquid exerts hydrostatic pressure on the
measuring diaphragm, resulting in a zero shift. In such an event, the
zero point can be corrected via the zero push-button or via the "set
PV to zero" command. Please refer to the [configuration section] for
further details. For transmitters without diaphragm seals, please
read the following considerations on the Vent/Drain valves in the
following relevant paragraph.
Attention − Potential damage to transmitter.
Static differential pressure transmitter (266DSH.x.H) please always
open the equalization valve of the manifold (if installed) before
applying pressure to the transmitter. High Static pressure can
damage the sensor causing a zero shift and a serious decrease of
the total performance in terms of accuracy. In this case, please
perform a full sensor trim.
It is important to mount the transmitter and to lay the process
piping so that gas bubbles, when measuring liquids, or
condensate when measuring gases, will flow back to the
process and not enter the transmitter measuring chamber.
Optional Vent/drain valves (code V1/V2/V3) on the transmitter
are located on the sensor flanges.
The transmitter has to be positioned so that these drain/vent
valves will be located higher than the taps on liquid service in
order to allow the venting of entrapped gas or below the taps
on gas service in order to allow the air to vent off or
condensate to drain off. For safety reasons, take care of the
drain/vent valves position so that when the process fluid is
removed during the drain/vent operation it is directed down
and away from technicians. It is recommended to mount the
transmitter to prevent this possible source of damage for
unskilled operators.
Figure 6: Drain/vent valves configuration (respectively V1, V2, V3)
Important.
particularly useful information. It does not indicate a dangerous or
damaging situation.
Important.
please notice that the Vent/Drain valves can be configured only on
the process axis (V1).
In case of a High
This message indicates indicates operator tips or
In case of a High Static differential pressure transmitter,
2600T Series Pressure transmitters | OI/266/HART-EN Rev. M 13
5 Mounting