Configuration Of The Transmitter Without Integrated Lcd Display; Configuration Of Lrv And Urv (4 - ABB 2600T Series Operating Instruction

11.4 Configuration of the transmitter without integrated
LCD display
IMPORTANT (NOTICE)
The configuration possibilities described below
are only possible for the models 266Cxx with
switched off rake function and for the 266Jxx
models.
The parameters "start of measuring range" and "Span" are set
directly on the transmitter via the operating buttons. These
operating buttons are arranged under the rating plate///.
In order to operate the device locally, unscrew the fastening
screws of the rating plate, and swing the rating plate
clockwise to the side.
ATTENTION – material damage due to a
magnetic field!
The use of magnetic screwdrivers results in
damage of components.
Do not use a magnetic screwdriver to operate the
buttons.
The transmitter has been calibrated by the manufacturer
based on the order information. The set measuring range start
and measuring/// range end are specified on the identification
plate.
The following always applies:
— The first pressure value (e.g. 0 mbar) is always assigned to
the 4 mA signal (or 0%) and the second pressure value
(e.g. 400 mbar) is always assigned to the 20 mA signal
(or 100%).
— To make new settings on the transmitter "measuring range
start" and measuring range end" are specified on the
measuring cell as pressure. In this regard, measuring
range limits must not be exceeded.
IMPORTANT (NOTICE)
A reducing station with adjustable pressure and
reference display can be used as the pressure
generator.
For the connection, ensure that liquid residues (for gaseous
test materials) or air bubbles (for liquid test materials) are not
in the impulse line; liquid residue can cause measurement
errors in the test.
The possible measuring error for the pressure generator
should be at least three times less than the desired measuring
error for the transmitter.
It is required to set the damping to the value "zero".
11.4.1 Configuration of LRV and URV (4 ... 20 mA range)
1. Measuring range start pressure (4 mA) - specified by the
process or by a pressure generator. Pressure must be
stable and must be applied with high accuracy < 0.05%.
Press operating button "Z". The output current is set to
4 mA.
2. Charge the transmitter with the pressure that corresponds
to the end of the measuring range, and wait for approx.
30 seconds, until it has stabilized.
3. Press the operating button "S". The output current is set
itself to 20 mA.
4. If required, reset the damping back to the original value.
5. Document the new values that have been set. The
appropriate parameters will be saved 10 seconds after the
last activation of the operating button "Z" or "S" in non-
volatile memory.
IMPORTANT (NOTICE)
This configuration procedure only changes the
4 ... 20 mA current signal; the process value
shown on the digital display or the user interface
remain unchanged in this process. Possible
differences can be avoided as described.
After such a correction, the device configuration
must be checked.
266CRx, 266JRx, 266CSx, 266JSx | OI/266CXX/266JXX/HART-EN Rev. B 37