Looking At The Measurement Connections - Fluke 123 User Manual

Fluke 123/124
Users Manual
Looking at the Measurement
Connections
Look at the top of the test tool. The test tool provides two
4-mm safety shielded banana jack inputs (red input A and
gray input B) and a black safety 4-mm banana jack input
(COM). (See Figure 1-5.)
Input A
You can always use the red input A for all single input
measurements possible with the test tool.
Input B
For measurements on two different signals you can use
the gray input B together with the red input A .
COM
You can use the black COMmon as single ground for low
frequency measurements, and for Continuity, Ohm (Ω),
Diode, and Capacitance measurements.
Warning
To avoid electrical shock or fire, use only one
COM (common) connection, or ensure that
all connections to COM
potential.
12
are at the same
Figure 1-5. Measurement Connections