Installation, Operation and Service Manual
LKP Series
© 2016 DynAmp, LLC
Page 10
041749 K
Read and follow the following considerations before mounting the head. These
considerations and other mounting restrictions and recommendations are detailed in
Technical Bulletin No. 9907, “LKP and LKB Sensor Mounting Guidelines and Restrictions”.
A.) Choose a mounting location where the ambient air temperature does not exceed 55°C.
The standard head is designed for indoor use only and should be kept away from high
heat and corrosive atmospheres. Also protect the head from direct sunlight as it
causes the head temperature to rise, thus limiting the upper operating range in some
applications. If the head is to be installed in a harsh environment, please discuss
protective measures with the factory.
B.) The head should be protected from rain and snow. Also, no part of the head should be
submerged under water at any time.
C.) Temporary and final support members should be nonmagnetic (for example, aluminum
beams, struts or stranded cables, or wood, fiberglass, or Phenolic where appropriate)
to minimize distortion of the magnetic field as seen by the head. It is recommended to
keep any magnetic materials, structural or otherwise, at least 1 meter (3ft) away from
the Measuring Head (2 meters recommended). Refer to Technical bulletin No. 987,
“Ferromagnetic Materials near LKP or LKB High Current Measurement Systems” for
further details.
D.) The head is designed to be supported from the bottom.
Never suspend the head by
the top half alone
. If the heads are to be mounted in a position other than vertical,
each half of the head should be independently supported. The lifting holes in the top
half should be used for attaching other anti-tipping brackets. No additional drilling of
the head is authorized, as damage may result.
E.) When mounted, the two head halves of the head should be in the same plane so no
distortion of the part line will occur. No tension, twist, or excessive pressure should be
applied to the part line.
F.) The head should be electrically insulated from the bus. A ¼” (6mm) minimum distance
between the bus and window insulation should be maintained. This will insure electrical
isolation of the head structure from the bus.
The head itself is grounded via the
cables to the Metering Unit. Do not short between the head structure and the bus
to prevent serious damage or injury.
For that reason, always disconnect the cables
from the head prior to installation or maintenance. Touching both an energized bus bar
and grounded Measuring Head may result in electrical shock.
Each cable has a GRN/YEL wire that is used for head grounding. In order to
electrically float the head above ground potential, the GRN/YEL wire (from each cable)
must be disconnected at the Metering Unit. Note that for safety reasons, the Metering
Unit cabinet should be grounded at all times.
G.) Do not loosen any of the bolts that hold the head casting sections together. Doing so,
will compromise the seal between parts and allow water or contaminants to enter the
head.
H.) The head must be installed with current arrows in the same direction as conventional
current flow in the bus. An arrow indicates the direction that conventional bus current
must flow through the aperture (+ to -). No damage will occur if the head is reversed,
but the system will not produce an output.
I.) CAUTION: The part-line insulation pieces (located on the mating surfaces of the head)
contain sensitive electronic devices, are brittle, and can be easily damaged if one is not
careful during installation.
