Operation; Local Push Buttons Functionality (Option R1); Factory Settings; Configuration Types - ABB 266 HART Series Operating Instruction

8 Operation

8.1 Local push buttons functionality (option R1)

266 transmitters allow local adjustments via the on-board non
intrusive push buttons, when selected. The push buttons are
located under the identification nameplate. To gain access to
the local adjustments release the fixing screws of the
nameplate and rotate clockwise the identification plate.
Warning - Potential damage to parts. Operating the control
buttons with a magnetic screwdriver is not permitted.
1
2
3
Figure 47: Pushbutton functionalities

8.2 Factory settings

Transmitters are calibrated at the factory to full span (0 to URL)
or according to the customer's span if specified. The calibrated
range is provided on the name plate whereas the tag number
on the additional tag plate. The calibrated range and tag
number are provided on the name plate. If this data has not
been specified, the transmitter will be delivered with the
following configuration:
Parameter
Lower Range Value (LRV) (4 mA)
Upper Range Value (URV) (20 mA)
Output transfer function
Damping
Transmitter failure (alarm)
Optional LCD HMI scale
Important. All of the configurable parameters here on the left can
easily be modified either via the optional LCD HMI, with a HART
handheld terminal or a compatible software solution. Information
regarding flange type and material, O-ring materials, and filling
liquid type is stored inside the non-volatile memory of the device.

8.3 Configuration types

Pressure transmitters can be configured as follows:
— Configuration of the parameters for the lower and upper
range values (via Zero and Span push buttons), without
an integral LCD HMI.
— Configuration of the pressure transmitter using the
integral LCD HMI with keypad (menu-controlled).
— Configuration with a handheld terminal.
— Configuration using a PC/laptop via the graphical user
interface (DTM).
1 - Identification nameplate
2 - Zero pushbutton
3 - Span pushbutton
4 - Write-protection
pushbutton
4
Factory setting
Zero
Upper Range Limit (URL)
Linear
1 second
Upscale (21 mA)
1 line PV and output signal bargraph
8.4 Configuring the transmitter without an integral
LCD HMI
The "lower range value" and "span" parameters can be set
directly on the transmitter using the external or internal push
buttons.
The transmitter has been calibrated by the manufacturer based
on the order information. The tag plate contains information on
the "lower range value" and "upper range value" set. In general,
the following applies:
The first pressure value (e.g., 0 mbar) is always assigned to the
4 mA signal (or 0%), while the second pressure value (e.g., 400
mbar) is always assigned to the 20 mA signal (or 100%). To
change the transmitter ranging 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. Reducing station 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 impulse 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 1 second.
Important. In case of the 266 transmitter for absolute pressure
(266Vxx, 266Rxx, 266Axx and 266Nxx) with a measuring range less
than or equal 650 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. 30 minutes
for 266Vxx, 266Rxx and 266Nxx models and 3 hours for 266Axx
models after commissioning, until the sensor has stabilized to such
an extent that the specified accuracy can be maintained.
8.5 LRV and URV configuration (4 ... 20 mA ranging)
— Apply the pressure for the "lower range value" and wait
approx. 30 s until it has stabilized.
— Press the "Z" button (internal or external) for at least 5
seconds. This sets the output current to 4 mA.
— Apply the pressure for the "upper range value" and wait
approx. 30 s until it has stabilized.
— Press the "S" button (internal or external) for at least 5
seconds. This sets the output current to 20 mA.
— If required, reset the damping to its original value.
— Record the new settings. The respective parameter will
be stored in the non-volatile memory 10 seconds after the
"Z" or "S" buttons are last pressed.
Important. This configuration procedure only changes the
4 ... 20 mA current signal; it does not affect the physical process
pressure (PV value) also shown on the digital display or user
interface. To avoid potential discrepancies, you can use follow the
procedure below. After performing a correction, you must check the
device configuration.
2600T Series Pressure transmitters | OI/266/HART-EN Rev. M 35
8 Operation