Teledyne LXT-280 - Manual (Page 12)

Introduction LXT-280
Teledyne Analytical Instruments 2
1.2 Main Features of the Transmitter
The LXT-280 Transmitter for dissolved oxygen applications
incorporates the following standard features:
• Magnetic switches located behind a glass window can be
activated without having to open the instrument.
• 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 at 0 ppm or 0% oxygen and
-400 mV at full scale.
• 4-20mA current output transmitted on the same 24 VDC power
wiring. The current output is fully expandable to any range
within the transmitter’s full operating range. 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-280 Transmitter is a versatile instrument designed
to meet the needs for liquid analytics and process control across a wide
range of applications. Options available for this transmitter includes:
Optional Software
Security Access—keyboard security option: Allows only
authorized personnel entry to calibration modes.
1.4 Front Panel
The operator interfaces with the instrument through a sight glass
window using magnetically activated arrow keys. This is accomplished
by touching an instrument magnet to the glass window directly over the