K19404, K19494 Dropping Point Apparatus
Operation and Instruction Manual
K19404, K19494-Manual -13-
6 Safety Features
The Koehler K194X4 Dropping Point Apparatus
is equipped with several safety and protection
features, which are described in the following
sections.
6.1 Over-Power Protection
The Koehler K194X4 Dropping Point Apparatus
is equipped with Over-Power Protection circuitry,
which prevents the unit from unsafe electrical
conditions. If power to the unit is lost, then turn off
the main power and turn it back on again. The
main power switch also functions as a circuit
breaker.
WARNING: Disconnect power to the unit
before servicing and accessing any internal
portion of the instrument to avoid exposure to high
voltages and/or temperatures which may result in
personal injury or death. If you have any questions
about maintaining your equipment, then please do
not hesitate to contact the Koehler technical
service department.
7 Maintenance
WARNING. Disconnect power to the unit
before servicing to avoid exposure to high
voltages and/or temperatures which may result in
personal injury or death. If you have any questions
about maintaining your equipment, please do not
hesitate to contact the Koehler technical service
department.
7.1 Routine Maintenance
The K19494 Dropping Point Apparatus requires
little routine maintenance to provide many years of
continuous service. However, over the course of
time, some instrument parts may need to be
replaced. When ordering replacement part(s),
please provide the model number, serial number,
and product shipment date of your equipment so
that we can ensure you will receive the proper
replacement part(s).
7.2 Instrument Cleaning
To clean the instrument’s exterior, which
includes all painted surfaces, either a solution
of soap and water or laboratory grade
detergent may be used.
Apply cleaner to clean wipe or cloth, not to the
instrument directly. Wipe surface clean.
Do Not clean bath exterior with organic
chemicals such as Acetone, Toluene, Hexane,
etc.
For more difficult cleaning of finished surfaces,
a dilute solution of isopropanol in water may
be used.
It is not recommended that more aggressive
solvents be used on painted surfaces since
paint color will tarnish or be stripped from the
instrument.
Stainless Steel surfaces, such as on the top
plate, may be cleaned using a more
aggressive solvent such as a stainless steel
cleaner.
SHOCK AND BURN HAZARD: Only clean
inside the bath when equipment is de-energized
and unplugged from the mains power supply.
Allow adequate time for heating coils to completely
cool before cleaning.
7.3 Replacement Parts
Brick Heater, 1000W, 230V
Stirrer Motor, 230V 50/60Hz
Test Tube with Indentations
Test Tube Thermometer Cork
Test Tube and Thermometer
Support
Borosilicate Glass Beaker,
400mL
Gage Pin, 2.82mm (0.111")
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