QWhat is the Pollution Degree in your specifications?
If contaminants adhere to a measuring instrument, the insulation will worsen and increase the risk of electrical shock.
Therefore, the safety standard IEC60664-1 classifies the environment in which to use a measuring instrument from Pollution Degrees 1 to 4.
HIOKI products are designed in accordance with Pollution Degree 2, which is "Normally only non-conductive pollution occurs. Temporary conductivity caused by condensation is to be expected."
Please do not use our products in wet environments or one that includes conducive dust.