Fluke 7341 User Manual page 44

7341
Users Guide
receive excess fluid expanded in the process of heating the bath to higher temperatures.
Any liquid will expand when heated. To prevent the bath from overflowing when the
fluid expands, the excess fluid must be removed either prior to heating or by allowing it
to drain out of the bath tank.
The fluid level must never be below the heating elements.
This bath has an overflow tube attached to the bath tank that extends to the rear of the
bath and drains into the fluid expansion reservoir. The reservoir has enough capacity to
cover a large range of thermal expansion rates for different fluids. No attempt must be
made to plug the overflow tube to prevent fluid from draining. Do not attempt to fill the
bath to a level higher than the overflow tube level.
The fluid expansion reservoir is stainless steel with an aluminum heat shield to prevent
touching when the tank is hot. There is a stainless steel dust cover over the reservoir with
an elbow on top that the drain tube is inserted into. The reservoir hangs on a hook and is
attached to the bath with a thumbscrew.
The drain tube and dust cover may be hot. Always be sure the
drain tube is fully inserted into the elbow of the dust cover.
To drain fluid from the reservoir, first remove the dust cover and set aside. Then undo the
thumbscrew and carefully lift it with the two handles provided on the back. The fluid may
then be poured back into the bath when it is cooler or poured into some other approved
container. Caution: Be careful when handling hot fluids, burns can result. When the
excess fluid has been removed, reverse the process to replace the reservoir and dust cover.
Always wipe away spilt fluid if spilling occurs.
The overflow tube is not large enough to handle large flow rates encountered by
overfilling the tank. It is intended for expanding fluid rates from heating only. Fill only
until the level reaches the top of the stir baffle (see Figure 4-1).
7-4
Note
Warning
Warning