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6-1
Chapter 6
Bath Use
Caution:
Read before placing the bath in service
The information in this section is for general information only. It
is not designed to be the basis for calibration laboratory
procedures. Each laboratory will need to write their own
specific procedures.
6.1 General
Be sure to select the correct fluid for the temperature range of the calibration.
Bath fluids should be selected to operate safely with adequate thermal properties
to meet the application requirements. Also, be aware that some fluids expand
and could overflow the bath if not watched. Refer to Section 8.3, Bath Fluid, and
subsequent subsections for information specific to fluid selection and to the
MSDS sheet specific to the fluid selected. Generally, baths are set to one
temperature and used to calibrate probes only at that single temperature. This
means that the type of bath fluid does not have to change. Additionally, the bath
can be left energized reducing the stress on the system.
The bath generates extreme temperatures. Precautions must be taken to prevent
personal injury or damage to objects. Probes may be extremely hot or cold when
removed from the bath. Cautiously handle probes to prevent personal injury.
Carefully place probes on a heat/cold resistant surface or rack until they are at
room temperature. It is advisable to wipe the probe with a clean soft cloth or
paper towel before inserting it into another bath. This prevents the mixing of
fluids from one bath to another. If the probe has been calibrated in liquid salt,
carefully wash the probe in warm water and dry completely before transferring it
to another fluid. Always be sure that the probe is completely dry before inserting
it into a hot fluid. Be aware that cleaning the probe can be dangerous if the probe
has not cooled to room temperature. Additionally, high temperature fluids may
ignite the paper towels if the probe has not been cooled.
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