3M 2273E - Manual (Page 7)

DIRECT CONNECT METHOD
Make sure the Transmitter is off. Plug the Direct Connect Cable into the
front panel jack. Connect the Black clip to the ground rod. Place the
ground rod in the earth perpendicular to the suspected cable path. If
necessary, extend the black lead with the Ground Extension Cable. Next,
remove the ground bonding and attach the Red clip to the shield.
Note: Never attach or remove the direct connect cable from the
Transmitter front panel jack while the red and black clips are connected
to a cable.
Page 6
Press to turn the Transmitter on in the Ohms mode . It will
measure the continuity of the cable under test. The results are displayed in
ohms and as a tone (solid tone = good ground; beeping tone = usable
ground; no tone = poor or no ground).
Note: In the ohms mode, the Transmitter can detect voltage as well as
ohms. If voltage is detected, the display will alternate between displaying
ohms and volts. When displaying ohms, the flag over the
will be
visible. When displaying volts, the flag over the 'V' will be visible. When
the voltage magnitude is sufficient to impair the accuracy of the ohms
measurement, only voltage will be displayed. If the voltage is AC, a sine
wave
will be visible on the display. If a high AC voltage is detected, a
rapid beeping tone will be heard.