Operation LXT-220 DO
Teledyne Analytical Instruments 28
4mA1 .00 ppm
20mA1 10.00 ppm
(now 18.84 ma)
(ch1 PV)
Current output menu
Plot 4-20 1
Sample .1 m
(ch1 PV)
Current output menu
3.2.4.2 SETUP SUBMENU
Choosing SETUP from the Parameter Selection Menu brings up the
first of a series of screens that allows the user to configure some initial
parameters in the LXT-220 controller. These parameters are:
• 4 to 20 mA outputs
• relay contacts
• PID control
• HART
You can also setup how the graphic display plots the current output
using the Plot function. The menu below shows the Plot function. In this
case, the process variable assigned to Channel 1 is plotted and sampled
every 6 seconds (.1 min).
To set up additional parameters or to change to current preset
parameters refer to Section 3.3 Configuring the LXT-220 in this manual.
3.2.4.2.1 CURRENT OUTPUT SETUP
This menu is used to set or adjust the current output range with the
process variable. The top line defines the 4 mA point, while the bottom line
defines the 20 mA point. Between these points, the output current is linear
with respect to the sensor input. The standard LXT-220 provides a single
output channel but options are available to expand the number of current
outputs to 4. See Section 3.3 Configuring the LXT-220 in this manual for
information on assigning other parameters to additional outputs.