Rosemount Analytical 404 Operating Manual
WARNING
Before removing the sensor, be absolutely certain
that the process pressure is reduced to 0 psig and
the process temperature is lowered to a safe level!
Model 404
ENDURANCE™Conductivity Sensor
Instruction Sheet
PN 51A-404/rev.M
December 2010
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.
SENSOR SPECIFICATIONS
SPECIFICATIONS
MODEL 404-16 (PVC body) MODEL 404-17 (stainless steel body)
Wetted Materials Titanium, PEEK (glass filled), PVC, Titanium, PEEK (glass filled),
EPDM, polyethylene 303 SST, EPDM
Temperature Range 32-140°F (0-60°C) 32-212°F (0-100°C)
Maximum Pressure 20 psig (239 kPa abs) at 60°C (140°F) 100 psig (791 kPa abs)
100 psig (791 kPa abs) at 25°C (77°F)
(use FNPT fittings only)
FIGURE 1. Installation of Model 404 Sensor
For additional information, please visit our website
at www.emersonprocess.com/raihome/liquid/.
INSTALLATION
The wetted sensor materials may not be compatible
with process com position and operating conditions.
Application compat ibility is entirely the
responsi-
bility of the user.
CAUTION
SENSOR/PROCESS
APPLICATION COMPATIBILITY
WARNING
2
MODEL 404 WIRING
WIRING DIAGRAMS
FIGURE 2. Model 54eC Wiring
FIGURE 3. Model 56 and 1056 Wiring
WIRING
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
RTD
RTD in
RTD sense
RTD return
RCV B
RCV A
RSHLD
DRVB
RTN
SENSE
RTD IN
SHLD
CLEAR
WHITE/RED
RED
DRVA
DSHLD
WHITE
CLEAR
GRAY
ORANGE
CLEAR
TB1TB2
FIGURE 4. Model 1066 Wiring
3
MODEL 404 INSTALLATION
FIGURE 5. Model Xmt-C-10 Wiring (Panel)
FIGURE 6. Model Xmt-C-11 Wiring (Pipe or Wall)
FIGURE 7. Model 5081-C Wiring
FIGURE 8. Model 6081-C Wiring
WIRING THROUGH A JUNCTION BOX
If wiring connections are made through a remote junction box (PN 23550-00), wire point-to-point. Use cable 23747-00
(factory-terminated) or 9200275 (no terminations).
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