Fluke Sewing Machine fluke123 User Manual
Tips and Troubleshooting
Using Proper Grounding
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Using Proper Grounding
Incorrect grounding can cause various problems. This
Section gives you guidelines for proper grounding.
Section gives you guidelines for proper grounding.
l
Use the short ground lead(s) when measuring DC or
AC signals on input A and input B. (See Figure 3-2.)
AC signals on input A and input B. (See Figure 3-2.)
Warning
To avoid electrical shock or fire, use only one
COM (common) connection, or ensure that all
connections to COM are at the same
potential.
COM (common) connection, or ensure that all
connections to COM are at the same
potential.
l
Use the unshielded black ground lead to COM
(common) for Ohm (
(common) for Ohm (
Ω
), Continuity, Diode, and
Capacitance measurements. (See Figure 3-3.)
Using the unshielded ground lead is also possible for
single or dual input measurements for waveforms with
a frequency up to 1 MHz. This may add some hum or
noise to the waveform display due to the unshielded
ground lead.
single or dual input measurements for waveforms with
a frequency up to 1 MHz. This may add some hum or
noise to the waveform display due to the unshielded
ground lead.
Figure 3-2. Grounding with Short Ground Lead
Figure 3-3. Grounding with Unshielded Ground Lead