Operating Instructions WBL-118 Refrigerated bath and circulator
14
protection against hazard of run-dry while heating is in progress. The STB resets automatically
once temperature resumes to below designated limit value if gentle and slow triggering happens.
However the reset of the STB is not possible if sudden and rapid temperature rising occurs while
continuous heating without any liquid.
For regular check of the STB for safety, refer to 4.2 for detailed procedures.
The first time powering up after repairing or standstill for long period, or at 6 months
intervals under normal use, check the functionality of the following parts or
components:
Cutout capability of the safety temperature limiter (STB)!
2.2.4 Put into operation
Use non-flammable heat transfer liquid only!
If an application system is connected, additional liquid may be necessary for appropriate level once
initiated.
Class I/NFL
Caution, Risk of fire!
The equipment is designed for operation with non-flammable heat transfer liquids
only! Water and mixture of water and glycol are the most popular non-flammable
heat transfer liquids appropriate for the equipment.
No silicone oil is allowed for use with this series of the equipment. The internal
silicone rubber parts may swell when in contact with silicone oil resulting in leakage of
the liquid!
For engineering change related to the use of silicone oil or other liquid, consult your
local MRC distributor or MRC technician! The use of inappropriate liquid may
adversely affect the performance and safety of the equipment!
Caution, Hazard of overflowing or low level!
Never attempt to initiate the equipment if no heat transfer liquid is filled or filling
volume is lower than the minimum level as specified; Never move the equipment if
the bath tank is fully filled with the heat transfer liquid; The liquid level may change
with the heating and cooling of the equipment!
Disconnect the application system from the equipment only after proper draining of
the heat transfer liquid, especially when the application system is charged to
maximum volume by additional filling of the liquid! The liquid level will change
significantly with the immersion or removal of the specimen!
347
