AMETEK 953 VMAX LDT - Manual (Page 4)

4
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • Phone 248.435.0700 • Fax 248.435.8120 • www.ametekapt.com
AUTOMATION & PROCESS TECHNOLOGIES
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If a mounting bracket or other part is used that is
made of ferromagnetic material (a material readily
magnetized), it should be placed no closer than 0.25"
from the LDT's rod end to minimize the effects of
magnetic flux distortion. This can cause an inaccurate
measurement of the magnet position.
Non-ferrous materials, such as brass, copper,
aluminum, non-magnetic stainless steel, or plastics,
can be in direct contact with the magnet assembly and
rod end without producing any adverse results.
2.1: Installing the LDT to a
Mounting Bracket
Parts discussed in this section can be found in Figures
1-1 and 2-1.
1. Unscrew the LDT’s jam nut from the threads
protruding from the hex mounting base.
2. Insert the LDT’s rod end into the mounting
bracket’s hole. The mounting bracket may contain
a 3/4-16 UNF-2B or metric M18 x 1.5 threaded
hole. In this case, screw the LDT into this hole
using the threads protruding from the hex
mounting base.
3. Once the LDT is in place, screw the jam nut
back onto the threads of the hex mounting base.
Use the 1.75" hex mounting base on the head
assembly to tighten the LDT to the bracket.
WARNING: Do not use the blue
aluminum cover of the head assembly
to tighten the LDT within the bracket
(see Figure 2-1). This may damage the LDT
and will void your warranty. To tighten the
LDT within the bracket, use the 1.75" hex
mounting base on the head assembly.
If the length of the LDT’s rod end is less than 30”, skip
to the sub-section: Mounting the Magnet Assembly.
Installing Support Brackets
It is recommended that a support bracket be used
Chapter 2: Installing the LDT
with LDTs having a rod 30”-71” in length. Supporting
the end of the rod will minimize operational errors and
protect against damage due to shock and vibration.
If the length of the LDT’s rod is 72” or longer, it is
recommended that additional support brackets be
used. These additional support brackets must be made
of a non-ferrous material. Because these additional
support brackets will interfere with the magnet’s
movement, a special split-type magnet assembly must
be used. To order a split magnet (P/N SD0411200)
and support brackets (P/N SD0411100), contact the
factory at 800-635-0289.
To install a support bracket for a LDT having a rod 30”-
71” in length, perform step 4a. If the rod is longer than
71”, perform step 4b.
4a. If the support bracket is made of a ferromagnetic
material (material readily magnetized), install the
support bracket no closer than 0.25” from where
the LDT’s dead band ends and the area of stroke
begins. Continue to the sub-section: Mounting
the Magnet Assembly.
To install two or more support brackets for a LDT
having a rod 72" or longer in length, perform the
following steps:
4b. Install support brackets at increments of 48”
throughout the LDT’s rod. Support brackets
placed within the Null Zone and area of stroke or
closer than 0.25” to the beginning of these areas
must be made of a non-ferrous material.
Mounting the Magnet Assembly
Before mounting the magnet assembly, the following
should be considered:
• Ferromagnetic material should not be placed
closer than 0.25” from the LDT’s magnet assembly
or rod end. Failure to do so could cause erratic
operations.
• Minimal clearance between the LDT’s rod and
the magnet assembly through the full stroke is
!