Hioki CHT3548, User Manual, Page: 46 / 81

Hope Electronics Technology Manual
Edition
V1.0 46
4.6 Switching the Measurement Current (In the 300m
Ω
Range)
With this instrument, the measurement current for the 300mQ range can be
changed to 300 mA (100 mA at the time of shipment from the factory). This
makes it possible to measure large current wiring under conditions that are
similar to the actual usage conditions. It is also useful when performing
measurement in an environment with external noise.
When measurement is performed with the 300 mA measurement current,
the 300 mA indicator lights up
*
1
When measuring resistance for connection sections (e.g., connector
contact, welded section, caulked section, screw-secured section) through which
large current flows, such as power supply cables and ground cables, it is
desirable that measurement be performed using the maximum current, as far as
possible, that can actually flow through those sections. The following explains
the reasons: