Dynisco TX180, Installation And Operation Manual

Page: 27 / 52

TX180 Temperature Transmitter 27
5. C
ONFIGURATION
U
SING THE
LI-1, O
NE
-L
INE
D
ISPLAY
To configure a transmitter using the
DISPLAY MODE
, either the LI-1 or LI-2 local LCD display is
required. These displays are available as an option and can be plugged into the top of the TX180
transmitter. The transmitter can also be purchased with these options already installed. These
inexpensive options make the reconfiguration, or re-ranging of the transmitter very simple and easy
to follow. Without the use of a calibrator, or any other tools, the transmitter can be set up for a
different sensor, or the new range limits can be set much like one would set the time on a digital
watch.
In the event that the LI-1 or LI-2 Display / Keyboard are not purchased at the same time as the
transmitter, the one piece display design allows for easy field installation by simply plugging the LI-
1or LI-2 into the top of the transmitter.
5.1 E
NTERING THE
D
ISPLAY
M
ODE
To start the
DISPLAY MODE
, first connect the transmitter to an appropriate DC power supply.
Typically a 24VDC supply is connected with the + side of the power supply connected to the
transmitter’s output “+” terminal and - side of the power supply connected to the transmitter’s output
“-” terminal. A series resistor in the loop is optional. A sensor may be connected to the transmitter’s
input terminals, but this is not required for setting up the transmitter.
With the standard factory set-up and no sensor connected, the LI-1 display will give the following
indication:
The transmitter is indicating a fault. This would be the proper indication, since there is no sensor
connected. The analog output would indicate greater than 100% (loop current at 23.00mA), which
is the standard over range condition. If the proper sensor were connected to the transmitter, the
display would indicate the sensor’s temperature. Please note that the display / keyboards can be
plugged into the transmitter while the transmitter is powered up. There is no need to disconnect
power before plugging the LI-1 or LI-2 into the TX180.
Press the key marked
NEXT
to begin scrolling through the Display Mode menus.
The 9900 code corresponds to the
RETURN TO OPERATE MODE
function. At this point,
assuming one does not want to return to the operate mode, the answer should be no, therefore,
press the key marked
NEXT
. Pressing the key marked Enter at this point will return the transmitter to
the operate mode.
FAIL SAFE
9900