Fluke 39, 41B user manual Input Connections, Using the Voltage Test Leads

Input Connections

Input Connections

Refer to Figure 4 for a view of the two-input measurement scheme. To measure voltage, insert the red test lead in “V” and the black test lead in “COM.” Current measurement uses a BNC connector attached to “CURRENT PROBE.” Connect “V” and “COM” to measure only voltage; connect “CURRENT PROBE” to measure only current. Make all three connections for power measurements.

Observe the following connection guidelines:

•Current

Clamp the Current Probe around the desired phase or neutral conductor. Make sure the arrow on the probe points toward the load (phase) or the source (neutral). The Tester is set up for use with an 80i-500s Current Probe. If you use another probe, you must make a selection change in the Configuration Screen.

•Voltage: 3-phase, 4-Wire

Connect the red test lead to the desired phase voltage; connect the black test lead to neutral.

•Voltage: 3-phase, 3-Wire, example D

Connect the red test lead to the phase conductor used by the Current Probe; connect the black test lead to another phase.

Using the Voltage Test Leads

The TL-24 Test Lead and AC-20 Test Clip combination (Figure 1), which allows for hands-free voltage measurements, is preferred when you are also using the Current Probe.

Note

Figure 4 shows suggested test lead and current probe usage.

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