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Degree of fouling
The following degrees of fouling are specified in ac-
cordance with IEC 664:
- Degree of fouling 1
No fouling or only dry, non-conductive fouling occurs.
The fouling has no influence.
- Degree of fouling 2
Only non-conductive fouling occurs. However, occasio-
nal conductance is to be expected due to condensation.
- Degree of fouling 3
Conductive fouling occurs, or dry, non-conductive fou-
ling that becomes conductive since condensation is to ‚
be expected.
- Degree of fouling 4
The fouling leads to continuous conductance due to con-
ductive dust, rain or snow.
B - 3
Please observe the following information:
• Warranty claims are voided in the case of damage caused
by failure to follow these instructions ! We will not accept
any liability for consequential damage!
• We will not accept any liability in the case of damage to
property or injuries to persons caused by incorrect hand-
ling or failure to observe the safety instructions! All war-
ranty claims are voided in such cases. Modifications to
the appliance are not permitted.
• Make sure that the appliance is put into operation proper-
ly by observing these operating instructions.
• The housing may not be dismantled with the exception of
opening the lid of the battery compartment.
• Measuring instruments are not toys and should be kept
out of reach of children!
• In industrial facilities, the applicable regulations for the
Operating Manual – 2-pole Voltage Checker BE20
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