A19
Appendix
While channel 4 is often used to measure the neutral line of 3-phase 4-wire connections, there are a vari-
ety of other uses since it is isolated from
the instrument's other channels.
This is an extremely broad range of applications that extend
s from monitoring DC power supply systems
to monitoring hardware internal power supplies. Since events can be detected using DC measured val-
ues, it is possible to monitor the AC power supply o
n channels 1 through 3 when DC power supply distur-
bances occur.
Appendix 6 Making Effective Use of Channel 4
DC power supply measurement
Example of DC power supply measure-
ment
±24 V, ±15 V, ±5 V, etc.
Used for separate
systems
±24 V, ±15 V, ±5
V, etc.
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