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Safety of the Digital Multimeter
Transcript of Safety of the Digital Multimeter
A recent Electrical Safety Authority (ESA) survey revealed that of 5000 electricians surveyed 11% have had a "violent failure of a multimeter"
An arc flash can be 7 times hotter than the sun for a split second Clamp Function Settings Selector Dial Digital Display Lead Ports What are the risks? Electrocution What can we do to protect ourselves? Used for safely testing current Indicates voltage,resistance, amps and frequency Used to select function Displays values of selected functions Where leads are connected to meter Burns Death Inspect leads and meter for damage Ensure the meter is in the correct function Make sure leads are in the correct ports Wear the proper PPE Use fused leads Only use meters if you have the proper training Parts of the Digital Multimeter What is an Arc Flash? An arc flash (or arc blast) is a type of
electrical explosion that results from
a low-impedance connection to
ground or another voltage phase in
an electrical system. Blindness How does this happen? Wrong settings (i.e. ohms scale selected when testing voltage) Wrong “Cat” area application Wrong probe socket used (i.e. amps instead of volts) Wrong use of the product, such as switching settings under power Wrong voltage applied, exceeding limits of meter Do not switch settings under load Do not exceed limits of meter CAT Rating Indicates the CAT rating Voltage Rating Maximum voltage that the meter can measure safely Questions