Im Englischen bitte zwischen "isolation" (Trennung) und "insulation" (Isolation) unterscheiden. Vorsicht, "false friends"

Electrical Isolation: Sensing elements and lead wires are electrically isolated from the outer probe surfaces, except as noted.
http://www.therm-x.com/Product.aspx?ProductID=492

An isolation linear amplifier circuit provides and utilizes coupling of switched-capacitors. An input differential signal is converted to a proportionated charge on the capacitor by gates controlling of charging and discharging of appropriate capacitors. Then the charge is detected by a differential amplifier with high input resistance. The isolation barrier is established by a configuration of capacitors and an array of gating switches.
http://www.patentvest.com/console/reports/docs/grant/0536103...

12. The circuit minimizing standby power in a power supply system, said circuit comprising:a detecting and isolation sensing part (1) coupled to an output of a power adapter (T1) in the power supply system;an electronic switch (3) responsive to the detecting and isolation sensing part (1); anda resistive element (Z) coupled to the electronic switch (3) and an input of the power adapter (IN1, IN2);wherein when the detecting and isolation sensing part (1) senses a power supply signal of the power adapter in work mode, the electronic switch (3) shorts the resistive element (Z); and when the power adapter (T1) is in standby mode, the electronic switch (3) is switched off and the resistive element (Z) is coupled to the power adapter.
Read more: http://www.faqs.org/patents/app/20090185402#ixzz0uAUwyKRT
http://www.faqs.org/patents/app/20090185402

EN insulation (2)
set of properties which characterize the ability of an insulation to provide its function
NOTE – Examples of relevant properties are: resistance, breakdown voltage.
http://www.electropedia.org/iev/iev.nsf/display?openform&iev...

EN uniform insulation of a winding, (of a transformer or of a reactor)
the insulation of the winding of a transformer or of a reactor when all its ends connected to terminals have the same power frequency withstand voltage to earth
http://www.electropedia.org/iev/iev.nsf/display?openform&iev...

EN isolation of a unit
the emergency measure consisting of the disconnection of a unit to maintain the supply of its own auxiliaries
DE Übergang eines Blockes in Inselbetrieb
http://www.electropedia.org/iev/iev.nsf/display?openform&iev...

EN isolation
function intended to make dead for reasons of safety all or a discrete section of the electrical installation by separating the electrical installation or section from every source of electric energy
DE Trennen, n
http://www.electropedia.org/iev/iev.nsf/display?openform&iev...

Falls der Verfasser fachkundig genug war, um diese Begriffe nicht zu verwechseln, müßte es sich also um das Festellen einer Trennung oder Überprüfung einer Trennstrecke handeln. Kommt dem Begriff einer Isolationsüberwachung ziemlich nahe. Hier geht es aber um richtei ganlavanische Trennungen (siehe z.B. die Verwendung von Optokopplern weiter oben)