Teledyne LXT-220 - Manual (Page 55)

Dissolved Oxygen Controller Appendix
Teledyne Analytical Instruments 55
A.2 Model Designation
The standard LXT-220 controller is 110VAC powered unit in a 1/2
DIN, NEMA 4X enclosure. It incorporates a backlit graphics display and
a membrane keypad. This instrument requires an external 24VDC to
power the outputs. An option is available for an internally generated
24VDC powered instrument.
The instrument is configured at the factory for the customer’s
application and so there are many different model designators.
The following codes will help in identifying a specific instrument
configuration.
Base Model:
LXT-220 LXT-220 controller
Channel 1 Input:
PH pH
ORP Oxidation Reduction Potential (REDOX)
DO Dissolved Oxygen (specify ppm or %)
PION Specific ion
CDL Conductivity, Low range (20uS or less)
CDH Conductivity, High range (50uS to 50mS)
CDT Conductivity Toroidal (electrodeless greater then 50mS)
RS Resistivity (0 to 50 megohms)
Channel 2 Input:
PH pH
ORP Oxidation Reduction Potential (REDOX)
DO Dissolved Oxygen (specify ppm or %)
PION Specific ion
CDL Conductivity, Low range (20uS or less)
CDH Conductivity, High range (50uS to 50mS)
CDT Conductivity Toroidal (electrodeless greater then 50mS)
RS Resistivity (0 to 50 megohms)