Revision 8 SLG 700 SmartLine Level Transmitter User’s Manual Page 147
5.6 Trimming Coaxial Probes
Tools required
Required tools depend on options ordered.
1
Thread locking compound is recommended. The thread locking compound must be process compatible
Procedure
The Coaxial probe consists of an inner rod conductor and a coaxial outer tube shield. To trim the
coaxial probe to required length, both inner rod and coaxial outer tube need to be trimmed off by the
same amount.
Step – 1: Turn off transmitter power.
Step – 2: Remove transmitter from installed location.
Step – 3: Depending on the length of the coaxial probe the outer tube may be constructed from a
single length of tube or be assembled using several tube segments joined to each other using tube
couplers. The amount of probe to be trimmed will dictate the extent of disassembly required.
Starting from the end of the probe farthest from the process connector, remove the appropriate
number of outer tube sections to be able to complete the trimming operation. If the probe is under
2.0 m in length, it will be secured to the process connector by an internal thread. Use a wrench to
hold the process connector by its flats and a pipe wrench to unscrew the outer coaxial tube. If the
probe is over 2.0 m in length, the section of tube to be trimmed may be secured by a tube coupler.
To release the tube, loosen the two M3 set screws holding the coupler in place, then use two pipe
wrenches to unscrew the tube from the coupler.
Note: if only a small length of the probe requires trimming, only the end segment of the tube will
need to be removed from the assembly.
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