Emerson Rosemount 385+ -02, Reference Manual, Page: 12 / 42

6 Installation
Installation Reference Manual
February 2019 00809-0100-3386
2. With the male connector on the sensor’s body, insert the sensor into the ball valve until it
gently touches the closed valve. The molded electrode guard will protect the glass bulb
from breakage.
3. Thread the male connector body tightly into the ball valve assembly. DO NOT tighten the
hex nut on the male connector body; doing so would not allow the sensor to be inserted
through the ball valve.
4. Pull back hard on the sensor assembly, as if trying to remove the sensor, to be certain that
the sensor cannot come free of the ball valve assembly. The built-in retraction stop will
butt against the shoulder of the male connector if properly installed.
5. After confirming that the sensor assembly is properly secured by the valve assembly, the
valve may be opened and the sensor positioned into the process at the desired depth and
orientation.
6. While holding the sensor in position, tighten the hex nut of the male connector to firmly
secure the sensor in place. When the hex nut is tightened, the Teflon ferrule inside the
compression fitting clamps the sensor tube. (See Figure 4-2.)
2.2.2 Submersion/Insertion Option
Code Option -03 & -04). Figure 2-3 and Figure 2-4. The Rosemount 385+ may be installed through
a weldalet or a pipe tee or “Y” when used with a process connector (P/N 23166-00-01).
For submersion service, a process connector (P/N 23166-00-01 or 9510066) may be used with a
water tight 1 in. schedule 80 CPVC or PVDF standpipe conduit. Refer to Figure 2-5. Tapered threads
in plastic tend to loosen after installation. It is therefore recommended that TEFLON tape be used
on the threads and that the tightness of the connection be checked frequently to assure that no
loosening has occurred. The sensor should be installed within 80° of vertical, with the electrode
facing down.
The sensor must be captured by the valve assembly and the male connector so that it cannot be blown free
by process pressure if mishandled during insertion or retraction.
CAUTION
Over tightening the hex nut may damage the ferrule.
CAUTION
A stainless steel ferrule is available if the TEFLON ferrule does not inadequately grip. When using the metallic
ferrule, care must be taken to avoid over tightening and damaging the sensor tube. If the male connector
leaks during insertion or retraction, replace the O-ring in the male connector.
NOTICE