Emerson Rosemount 385+ -02, Справочное руководство, Страница: 28 / 42

22 Maintenance
8. Connect the sensor wires to the terminals on the printed circuit board in the junction box
in the manner recommended on the junction box cover, or see Figure 2-4. Reattach the
BNC connector to the preamp. Screw on the cover of the junction box.
9. Insert the sensor in the process fitting. Stop it against the closed ball valve. Slide the
processend male connector down the sensor tube to mate with the process fitting. Tighten
the male connector into the process fitting.
10. Pull back hard on the sensor assembly, as if trying to remove the sensor, to be certain that
the sensor cannot come free from the valve assembly and male connector. The built-in
retraction stop collar at the end of the sensor will butt against the shoulder of the male
connector.
11. Open ball valve and position the sensor at the desired insertion depth and orientation.
Using a crescent or open end wrench, tighten the hex nut (B) to secure the sensor in place.
If the sensor is to be stored, the rubber boot should be filled with 7 pH buffer solution and replaced
on sensor tip until ready to use.
A stainless steel ferrule is available if the TEFLON ferrule does not adequately grip. When using the metallic
ferrule, be careful and avoid over tightening. This can damage the sensor tube.
NOTICE
If the male connector leaks during insertion or retraction, replace the O-ring (PN 9550099) in the male
connector body (A).
CAUTION
Figure 4-1: Sensor Tube Replacement
Maintenance Reference Manual
February 2019 00809-0100-3386