Low-Ohm Resistance Measurement - Amprobe 0100-PLUS Bedienungshandbuch

Low-Ohm Resistance Measurement

This measurement is used to check protective earth conductors, grounding conductors, and
equipotential bonding conductors for low-impedance continuity. The resistance is
determined by current/voltage measurement.
• Prior to any Resistance measurement, it must be guaranteed that no installation parts to be
tested are live.
• Prior to any resistance measurement it is possible to compensate test lead resistance
1) Connect 2 test leads to the 0100 PLUS (sockets L1 and L2).
2) Plug test probes or crocodile clips onto the test leads and connect the test leads to the
EUT.
3) Set measurement range selection switch (32) to „LOW-Ω" measurement range.
• If an external voltage is present, the instrument displays Uext (5) and attention (1). The
Low-Ohm resistance measurement is then blocked. The symbol „Uext" (5) disappears if a
second measurement is started without foreign voltage present.
4) Press the "Start" (26) key. During the measurement the display shows "-".
5) Read measurement value on display.
• If „>1999 Ω" appears on the display, the resistance is higher than 1999 Ohm.
• The polarity of the test current applied may influence the measurement result by means of
galvanic elements within the EUT. For this reason always repeat the measurement with
reversed polarity to compare the measurement results.
WARNING
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