Teledyne LXT-220 - Manual (Page 14)

Introduction LXT-220 DO
Teledyne Analytical Instruments 14
The LXT-220 can be upgraded with pre-pHault Diagnostics &
HART Communications option which alerts the operator to a pending
DO, pH, ORP, or ISE electrode failure.
The LXT-220 is housed in a rugged NEMA-4X housing with all
operator switches conveniently located on the front panel.
1.2 Main Features of the Transmitter
The LXT-220 Controller for dissolved oxygen applications
incorporates the following standard features:
• Front panel membrane switches
• Menu driven backlit display with contrast adjustment
• Automatic Calibration. This allows calibration points to be
defined upon initialization of the transmitter.
• An easy back to factory calibration menu allows the instrument
to return to a predetermined factory calibration. The default
parameters are: zero electrode offset and –157.5mV/FS slope.
• 4-20mA current output fully expandable to any range within the
transmitter’s full operating range. The output is field selectable
and fully programmable. The current output can be configured to
be reverse acting.
• Temperature Conversion. Temperature can be displayed in either
Fahrenheit or Celsius. The units can be toggled from one to the
other in the field with the conversion calculation performed
automatically.
1.3 Optional Features
The Model LXT-220 DO Controller is a versatile instrument
designed to meet the needs for liquid analytics and process control
across a wide range of applications. There are many options available
for the transmitter including:
• Dual Input: An optional second input can be provided for pH,
ORP, resistivity/conductivity, or Specific Ion. The second input
can also be used as a second analysis for dissolved oxygen or as
specific compensation for the primary input.