Fluke 125 Fluke 125 Users Manual - Page 92
Using Proper Grounding, Grounding with Short Ground Lead
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Fluke 125 User Manual Using Proper Grounding Incorrect grounding can cause various problems. This Section gives you guidelines for proper grounding. z Use the short ground lead(s) when measuring DC or AC signals on input A and input B. (See Figure 9-2.) 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. z Use the unshielded black ground lead to COM (common) for Ohm (Ω), Continuity, Diode, and Capacitance measurements. (See Figure 9-3.) 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. Figure 9-2. Grounding with Short Ground Lead Figure 9-3. Grounding with Unshielded Ground Lead 9-6