> Introduction :: Pantech's Two Wire Transmitters, model 874 is designed over low drift low power components. It pumps in a constant current into the liquid through the conductivity cell to measure the electrical conductivity of any liquid. The
square wave signal is selected as an excitation voltage for the
conductivity cell for the ease for processing. It provide 4-20mA
dc signal on the same two wire which carry the 24 V DC for conductivity
measurement. The transmitter is an ideal choice for Linearized measurement
with standard conductivity cell. Temperature of the liquid is
monitored
by a RTD element and compensation is provided over the complete
operating range. It provides a current output signal of 4 –
20 mA DC capable of driving a load of upto 650 The range of the instrument can be selected by setting the DIP switches on the module and with proper cell constant. The temperature compensation provided as standard is 2%/deg. C but can be changed to a value anywhere between 0 to 4%. The
transmitter is available in field mounted housings with or without
local display. The local 3-½ digit loop powered display reduces
the load capability of the transmitter to around 500 > Specifications ::
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