8508A
Users Manual
ACI Filter
Press the
Filt key to see the ACI FILT menu:
adj104f.eps
ACI Filt Menu
The ACI FILT menu allows selection of one of four RMS filters. The indicated value is
the lowest signal frequency that can be measured without degradation of accuracy or
excessive reading variation.
AC Current - Movement between Menus
ACI
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ACI Movement Between Menu
Measuring AC Current
Insert the Multimeter in the current path via its A and
Lo terminals.
Similar connection considerations are required for AC current measurement as for AC
voltage measurement. Use shielded twisted pair cable to reduce induced interference
signals, and connect Guard to the source of common mode voltage via the screen, to
provide a separate common mode current path. The 8508A is designed to minimise the
burden (compliance) voltage generated when making current measurements, thus
improving measurement accuracy. However, it is recommended that leads of the
minimum practical length be used to reduce lead capacitance, lead inductance and loop
area.
Warning
HIGH CURRENT FLOW
To avoid fire hazard make sure that conductors of adequate guage are
used when making current measurement. High Current can cause
excessive heating of underated conductors and may cause a fire.
Note
The Current path between DMM terminals is not made when the Current
functions are not in use or when Front or Rear terminals are deselected.
3-24
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