attack solder seams in a sheet metal bath and result in fluid
leaks from the bath.
When disposing of mercury, use proper
DO NOT
methods according to safe recommended procedures.
discard mercury in sinks or drains.
Other precautions apply,
see FM 10-67-2, chapter 10.
1.
Mercury-to-Mercury Regulator
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The mercury-to-mercury regulator must be installed according to
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the procedures outlined in the manufacturers' instruction
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manual. The mercury-to-mercury regulator is sealed with a
hydrogen atmosphere to prevent the possibility of oxidation.
These units are delicate and must be handled with care.
They
should not be exposed to thermal shocks as a result of rapid
"spot" heating, and should be handled carefully to avoid
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breakage.
Do not forcefully install in any fashion that would
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subject the assembly to mechanical stress.
Before installing,
you must inspect the regulator for the presence of gas bubbles
in the mercury bulb or if the mercury in the movable capillary
is broken.
If the column of mercury is broken, it can be
rejoined by gently heating the bulb until the bubbles are driven
up into the expansion chamber. If the regulator is broken in a
bath, disconnect it from electrical source, drain and remove the
mercury as soon as possible!
2.
Wire-to-wire Mercury Thermoregulators
The wire-to- mercury thermoregulator is also called the
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€
"thermoregulator with moving magnet." It has two sections; the
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upper section is used for setting the desired temperature and
the lower section is where the actual temperature readings are
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derived.
The contact, which is a magnet, is adjustable.
You
must read the manufacturers' instruction manual in order to
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successfully
install
and
adjust
this
thermoregulator.
Instructions include:
how to join the mercury thread
how to mount the regulator
how to adjust the thermoregulator
directions for operating the thermoregulator
Once properly installed and adjusted, this regulator is easy to
use. It will respond to less than 0.01o Fahrenheit temperature
changes.
Much closer control may be obtained in a properly
agitated and insulated bath that has a properly controlled heat
input. Safety concerns raised in the previous paragraph applies
to the use of this thermoregulator.
5-2
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