Kobold DF-**01 series, User Instructions

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DF-SEN 10
FM Rev. 12/13
• Inspect instrument for damage upon arrival. Cracked, fractured, bent or otherwise
damaged instruments must not be put into use, since the device is weakened to an
unknown extent. (The operations and installation guide will explain how to make a
claim on damaged instruments.)
• Under NO circumstances must the maximum tolerances (temperature and pressure)
be exceeded.
• The maximum tolerances of the device have been determined using water, air and/or
oil. If using other media, especially corrosive ones, it is critically important that the
user determine chemical compatibility with our instruments. A list, detailing material
composition of our instruments, is available from KOBOLD Instruments Inc. upon
request. KOBOLD Instruments Inc. cannot accept responsibility for failure and
consequences resulting from use of media other than water, mineral oil, air, and
nitrogen.
• Install the device in a fully supported position within your flow system. This avoids
excessive stresses which may damage the instrument. In particular:
a. Ensure that the plumbing leading to and from the instrument is fully supported
and that the instrument does not perform the physical function of a joint.
b. When calculating stress on the device caused by plumbing, the weight of the
medium in the pipes must be considered as well.
c. Misaligned runs of rigid piping can cause large stresses when connected to
the instrument. Do not connect in such a fashion.
• During installation, avoid stresses on the instrument by following guidelines given
below:
a. When connecting fittings, hold the instrument fittings rigid with a correctly
sized wrench. Do not install by twisting the instrument into the pipe fittings.
b. Do NOT install by holding the device housing to provide counter-torque to the
pipe fitting.
c. Use an appropriate amount of PTFE tape on male threads of fitting. This
reduces the twisting stresses produced by tightening the fittings into each
other.
d. Do not use pliers or wrenches on the housing, as this may damage it.
e. Do not overtighten, as this may fracture the fittings.