Installation
Bath Preparation and Filling 5
5-5
applying power such as storage in a low humidity temperature chamber operating at 50°C
for 4 hour or more.
Bath Preparation and Filling
Caution
Avoid spilling fluid over the control panel. Immediately clean up
any spilling. Cover the panel if necessary during filling. DO NOT
overfill.
The Model 7341 Bath is not provided with a fluid. Various fluids are available from Hart
and other sources. Depending on the desired temperature range, any of the following
fluids, as well as others, may be used in the bath:
• Water
• Ethylene glycol/water
• Mineral oil
• Silicone oil
• Ethanol
Fluids are discussed in detail in Heat Transfer Fluid in Chapter 8.
Remove any access hole cover from the bath and check the tank for foreign matter (dirt,
remnant packing material, etc.).
Fill the bath with clean unpolluted fluid. Fill the bath carefully through the large
rectangular access hole to a level that will allow for stirring and thermal expansion.
Thermal Expansion in Chapter 8, explains fluid expansion.
Caution
DO NOT turn on the bath without fluid in the tank and the
heating coils fully immersed. See Fluid Expansion Reservoir in
Chapter 7, on how to use the fluid expansion reservoir.
Be sure the fluid expansion reservoir is properly installed checking to insure it is clean
and free of foreign matter. Carefully monitor the bath fluid level as the bath temperature
rises to prevent excessive overflow or splashing. Remove excess hot fluid if necessary
with caution.
Power
With the bath power switch off, plug the bath into an AC mains outlet of the appropriate
voltage, frequency, and current capacity. Refer to Specifications in Chapter 3, for power
details. Refer to and read the CAUTION at the front of the manual concerning brownout
and over voltage protection. Check the back panel label for the correct voltage and
frequency prior to energizing the bath.
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