ABB 261GS Operating Instruction page 29

Damping
When the output signal for the transmitter is noisy as a result
of the process, the signal can be smoothed (damped)
electrically.
The additional time constant can be set between 0 s and 60 s
in increments of 0.0001 s.
Damping does not affect the measured value shown in the
digital display as a physical unit. It only affects the quantities
derived from it such as the analog output current, HART
output (freely assigned start value, end value and unit).
HART Output
HART output refers to freely assigned start value, end value
and unit for the pressure measured. If the values are
configured so that the 0 % and 100 % points correspond to
5 m and 20 m respectively, the HART output will indicate a
value of 12.5 m at a pressure of 50 %.
Fault current
If a serious error is detected during the internal monitoring
routines run by the transmitter, the transmitter switches the
output signal to a specified minimum or maximum value as a
message.
Use the menu item "Fault Current" to select the alarm
response and the modulation direction of the output current in
the event of a malfunction.
"Upscale" (High alarm) means that the output current is
switched to the configured high alarm current.
"Downscale" (Low alarm) switches the output current to the
configured low alarm current. The level of the low or high
alarm current can only be changed using the graphical user
interface (DTM) or handheld terminal with loaded DD (device
description) of the 261 transmitter.
Setting limits:
— Min. alarm current: 3.5 ... 4 mA
— Max. alarm current: 20 ... 23.6 mA
Default setting from factory:
— Max. alarm current: 21 mA
Installation angle
You can specify the extent to which the transmitter deviates
from the recommended nominal position (vertical, process
connection pointing downward) by selecting one of the
angular degree settings displayed. This compensates for the
temperature-dependent effect of the mounting position.
Factory Reset
Restores the transmitter settings to the factory default.
Display – Main Operator View
The parameters listed can be displayed permanently in this
view (failsafe memory).
Contrast
If the lighting conditions are unfavorable, making it difficult to
read the LCD indicator, you can adjust the background by
making it darker or lighter (
The default setting is 50 %. If the menu cannot be read
because the contrast has been adjusted too much or because
of unfavorable conditions, e.g., change in temperature,
pressing both outer buttons together for > 5 s will restore the
default contrast settings.
or buttons).
261Gx, 261Ax | IM/261Gx/Ax-EN Rev. 08 29