MAXIMUM REGISTERING THERMOMETER INSTRUCTIONS
This thermometer registers the highest temperature it
has been exposed to, and holds that temperature indication
until reset.
The Short Version
Shake the Max Register Thermometer like you would a Fever Thermometer until
it reaches room temperature
Place the Max Register Thermometer in your autoclave and run a cycle
Remove the Max Register from the autoclave after the cycle is completed and record the temperature.
The results indicate the highest temperature reached during the cycle. The Maximum Register Thermometer
will greatly aid you in diagnosing problems as well as ensuring you that sterilization has taken place
The Complete Explanation (Technical Version)
This feature works on the principle
of a constricted capillary; on heating, the expansion of
the mercury within the bulb forces the mercury column
through the constriction.
The constriction prevents the mercury column from retreating under the
influence of gravity or mild vibration. Retraction of
the column is accomplished by âshakingâ the thermometer,
much like one would a fever thermometer,
thus generating centrifugal force and forcing the mercury
column back through the constriction.
Do not be concerned about the apparent separation
of the mercury column below the constriction. This is
a normal condition while the indication is above ambient
temperature, and will not affect the accuracy of
the indication. The mercury will rejoin after shaking
down to ambient temperature.
IMPORTANT:
The thermometer should be reset prior
to each use as described above. Be sure to continue
shaking until the column registers approximately
ambient room temperature.
Place the thermometer into the environment you wish to measure. The thermometer
should be allowed to remain exposed to the temperature you wish to measure for at
least five minutes,
and ALLOWED TO COOL TO AMBIENT TEMPERATURE
BEFORE IT IS READ. READ IN AN
UPRIGHT POSITION AND ONLY AFTER IT HAS
COOLED TO AMBIENT TEMPERATURE OR YOU
WILL OBTAIN A FALSELY HIGH READING.
