Emerson Rosemount 404, Quick Start Manual

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2 Install
2.1 Install sensor
If the sensor is installed in a sidestream with the sample draining to open
atmosphere, bubbles may accumulate on the electrodes.
Trapped bubbles will cause errors. Normally, as bubbles accumulate the
conductivity reading drifts down. To control bubble formation, apply a small
amount of back pressure to the sensor.
Figure 2-1: Rosemount 404 contacting conductivity sensor installation
2.2 Electrical installation
For additional wiring information on this product, please refer to the Liquid
Transmitters Wiring Diagrams
Table 2-1: Wire color and connections in sensor
Color Function
Gray Connects to outer electrode
Clear Coaxial shield for gray wire
Orange Connects to inner electrode
Clear Coaxial shield for orange wire
Red
White with red stripe
White
Clear Shield for all RTD lead wires
May 2019 Quick Start Guide
Quick Start Guide 7