Hioki ST5540, Instruction Manual, Page: 90 / 326

6.3 Measurement examples
84
Enclosure - Earth measurement
1.
Connect the instrument and the equipment under test.
See "3.3 Connecting equipment under test to the instrument" (p. 36)
2.
Connect a test lead to terminal T2.
See "5.1 Connecting the Test Lead" (p. 75)
3.
Position the tip of the test lead on the enclosure of the equipment under test.
4.
During manual measurements, touch current (enclosure - earth) measurement starts upon
returning to the measurement screen.
Measurement conditions can be changed during measurement.
See "6.1 Making manual measurements" (p. 79)
During automatic measurements, becomes available upon return to the measurement
screen. Press to start leakage current measurement between enclosure and earth.
Only is available during automatic measurements.
Touch current measurement
•
Conduct leakage current measurement between enclosure and enclosure
using two ungrounded locations on the enclosure.
•
The terminal block is not used for internally powered equipment, although
power must be supplied to [LINE IN] by a grounded two-plug power cord.
•
When the protective earth conductor is disconnected (single fault), a protec-
tively earthed enclosure is handled as a non-protectively earthed enclosure.
1
2
3
Terminal T2 and enclosure
4