ABB 266 DDS, Manual

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2 6 6 DDS H A RT |
P R E SSU R E T R A N SM I T T ER S | O I/ 2 6 6 D DS - EN R E V. B 23
Local display
The displays feature a LCD dot matrix for clear visualizations.
Here after a view with the HART short tag (1) is shown in the
upper left corner by maximum 8 characters.
The value (2) is displayed with 5 digits, sign and decimal point,
for one line visualization or with 8 digits, sign and decimal
point, for two lines visualization.
The engineering unit (3) can be anyone of HART list.
A bargraph (4) also provide a different format of indication with
relevant percentage for a selectable variable.
The polarity symbol (5) is displayed when high/low pressure
sides of a differential pressure transmitter are configured to
work as “reverse” action, via HART command. Once the
transmitter is connected to the process, it is possible to change
via software the polarity of the process connection instead
than mechanically reverse the impulse lines.
The lock symbol (6) appears when the write protection is
enabled or either the local operation has been disabled or the
device lock has been activated via relevant HART commands.
The ID of variables (7) is a kind of acronym which identifies the
variable currently displayed, with following possibilities.
ID Description
PDP Pressure value before transfer function/linearization
ENG Measured value after transfer function (scaled output)
OUT Analog current value in mA
PV% Analog output in percentage of calibrated range
TZ1 Counter of totalizer 1
TZ2 Counter of totalizer 2
BCH Batch counter
ST Sensor teperature
SP Static Pressure
HMI Measured value after dispaly scaling (HMI transfer function and
scaling)
Installing/Removing the LCD display
• Unscrew the housing cover of the communication board/LCD
side.
With an Ex d / Flameproof design, please refer to the
section “Securing the housing cover in flameproof areas”.
• L1/ display versions can be installed in different positions
(90° rotations) and shall be removed as per instructions listed
at dedicated paragraph.
Retighten the housing cover until is hand-tight. If necessary,
refer to the section “Securing the housing cover in
flameproof areas”.
Picture shows L1 display version, cover is dimensionally
different (short) but features the same threads and requires
the same installation practices.
Securing the housing cover in flameproof
areas
Each of the front faces of the electronics housing features a
locking screw (hex-head socket screw) on the bottom side.
• Install the housing cover to the housing by hand-tightening it.
• Turn the locking screw counterclockwise to secure the
housing cover. This involves unscrewing the screw until the
screw head stops at the housing cover.
Figure 19 - Windowed front cover and LCD display
IMPORTANT
IMPORTANT
IMPORTANT