|
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 monitered 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 650Ω.
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 500Ω. Also the transmitter is available in weather or explosion proof housing. |
