III
The Calisto/Calisto 2 monitor is designed to be permanently installed on critical transformers for
continuous measurement of dissolved fault gases in dielectric insulating fluids. Calisto and Calisto 2
monitor hydrogen and moisture. Hydrogen is a reliable indicator of a recent or existing fault, as all
fault types produce it to a greater or lesser extent.
Calisto 2 also monitors carbon monoxide. Carbon monoxide and moisture levels may highlight
undesirable deterioration of the paper/oil system, and conditions conducive to such deterioration.
Calisto 2 provides the key measurements required to monitor the health of the insulation system, in
order that informed service decisions may be taken, and major transformer problems may be
avoided.
The Calisto/Calisto 2 IED (Intelligent Electronic Device) has been carefully designed
and engineered to provide maximum accuracy while continuously monitoring the
concentration of dissolved gases in transformer oil.
It is assumed by Morgan Schaffer that users will read this Installation & Operation Manual
and will understand the operation of the instrument prior to installation of the IED.
All results obtained using the Calisto/Calisto 2 monitor are based upon material and
equipment under the responsibility of the client. Morgan Schaffer assumes no
responsibility and makes no warranty or representation, expressed or implied, as to the
condition, productivity or proper operation of any equipment or other property for
which the Calisto/Calisto 2 monitor may be used or relied upon for any reason
whatsoever.
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