Coaxial Probe Assembly; Slg720 - Honeywell SLG 700 Quick Start Manual

Coaxial probe assembly

Coaxial probes are constructed out of an inner rod and an outer tube. Depending on
the length of the coaxial probe it may be constructed out of several segments.
Note: For the flanged HTHP, when constructing the probe, the nut should not intrude
into the body of the process connector.

SLG720

Probe construction will depend on the length of the probe. In the case of the SLG 720
the inner rod is constructed out of 1.0m segments and the outer tube is constructed
out of 2.0m segments.
There are 2 types of rod segment: and extension segment and an end segment.
Extension segments have threads on both ends and the end segment has threads on
one end. Rod segments are joined to each other using a stud and lock washer.
There are 3 types of tube segment: Starter segments, extension segments and end
segments. Starter segments have an internal thread on one end and an external
thread on the other. Extension segments have external threads on both ends. End
segments have an external thread on one end and a clean end. The outer tube
segments are joined using tube couplers.
Probe Length ≤ 1.0m
Step
Fully thread the nut onto the central conductor of the process
connector. Place a lock washer between the locknut and the rod
segment and torque the nut against the rod segment and lock
washer to secure the connection.
1
Note: Tighten rod connection point to the following torque:
 SLG720 6.0 Nm (4.4 ft-lbs).
Slip the coaxial outer tube over the rod and spacer and tighten to the
process connector.
Note: Tighten connection point to the following torque:
2
Insert an end spacer into the end of tube. Align the holes in the end
3 spacer with the holes in the outer tube and insert the 2 locking pins.
Refer to Detail B of
8
SLG720 30 Nm (22 ft-lbs).

It is recommended that a process compatible

thread locking compound (i.e. Loctite 242) be
used on the outer conductor threaded joints.
Figure 5.
Quick Start Installation Guide
Action
December 2017