This may occur due to older equipment, or equipment with heating elements, or even wiring in buildings in the tropics where prolonged damp and rain conditions can cause the insulation resistance to lower due to moisture tracking.
22.
Although the leakage current of electrolytic capacitors is higher compared with the current flow over the insulation resistance at ceramic or film capacitors, the self-discharge of modern non-solid electrolytic capacitors can take several weeks.
23.
Although the leakage current of non-solid e-caps is higher than current flow over insulation resistance in ceramic or film capacitors, the self-discharge of modern non-solid electrolytic capacitors with organic electrolytes takes several weeks.
24.
Fluke's complete test and measurement line now includes digital multimeters, clamp meters, electrical testers, power quality analyzers, thermal imagers, insulation resistance testers, portable oscilloscopes, earth ground testers, infrared and contact thermometers, air quality meters, and vibration testers.
25.
Rosin ( RO ), Resin ( RE ), Organic ( OR ), Inorganic ( IN ) ), its activity ( strength of fluxing ) and reliability of residue from a surface insulation resistance ( SIR ) and electromigration standpoint, and whether or not it contains halide activators.
26.
A deficiency of the Insulation Resistance ( 500V / 250V d . c ) test is that the d . c voltage will not activate electromagnetic switches or internal relays etc . that are common in many modern power tools, computers, TVs etc . and therefore it can only test the appliance up to that point.
27.
The tests an appliance is required to undergo will depend on the type of appliance, its electrical Class and subject to a risk assessment by the technician . e . g . it may not be safe to perform a leakage current test which powers up the appliance, such as a grinder, if it can not be secured to a bench; an insulation resistance test may be a safe option.
