Silicone Oil; Fluid Characteristics Charts; Limitations And Disclaimer; About The Chart - Fluke 7341 User Manual

8.1.10.4

Silicone Oil

Silicone oils are available which offer a much wider operating temperature
range than mineral oil. Like most oils, silicone oils have temperature control
characteristics, which are somewhat poorer than water. The viscosity changes
significantly with temperature and thermal expansion also occurs. These oils
have very high electrical resistivity. Silicone oils are fairly safe and non-toxic,
but can be fairly expensive.
8.1.11

Fluid Characteristics Charts

CAUTION: Due to the unique properties of silicone oils and their ability
to migrate and creep through seals, adequate ventilation must be used to
prevent oil vapors from creating an oily, dirty environment. Oily, dirty en-
vironments reduce the lifetime of the instruments electrical components.
Table 2 and Figure 4 on pages 32 and 33 have been created to provide help in
selecting a heat exchange fluid media for your constant temperature bath.
These charts provide both a visual and numerical representation of most of the
physical qualities important in making a selection. The list is not all inclusive.
There may be other useful fluids not shown in this listing. The charts include
information on a variety of fluids, which are often used as heat transfer fluid in
baths. Because of the temperature range some fluids may not be useful with
your bath.
8.1.11.1

Limitations and Disclaimer

The information given in this manual regarding fluids is intended only to be
used as a general guide in choosing a fluid. Though every effort has been made
to provide correct information we cannot guarantee accuracy of data or assure
suitability of a fluid for a particular application. Specifications may change and
sources sometimes offer differing information. Hart Scientific cannot be liable
for any personal injury or damage to equipment, product or facilities resulting
from the use of these fluids. The user of the bath is responsible for collecting
correct information, exercising proper judgment, and insuring safe operation.
Operating near the limits of certain properties such as the flash point or viscos-
ity can compromise safety or performance. Your company's safety policies re-
garding flash points, toxicity, and such issues must be considered. You are
responsible for reading the MSDS (material safety data sheets) and acting
accordingly.
8.1.11.2

About the Chart

The fluid chart visually illustrates some of the important qualities of the fluids
shown.
Temperature Range: The temperature scale is shown in degrees Celsius. The
shaded bands indicate the fluids' general range of application. Qualities includ-
8 General Operation
Heat Transfer Fluid
31