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T+/T+PRO English Instruction Sheet
Page 13
• The GFCI button test function should demonstrate
proper operations. However, if there is cause to verify
proper operation of the GFCI receptacle in a 2-wire
system, apply one test probe of the Tester to the
energized input of the GFCI receptacle while applying
the alternates test probe to a known external neutral or
ground reference location external to the GFCI
receptacle. Operate the GFCI button on the Tester as
described in the Instruction Sheet to verify the GFCI
receptacle is operating properly.
Rotary Field Direction (T+ PRO Only)
This test shows the direction of a rotary field in a three-phase system
when measured phase to phase. The LCD indicates phase rotation for a
right or left-hand turning field from one phase to the next in a three-phase
system.
Note
If measuring from phase to neutral at a panel or single-phase
outlet, the Tester may indicate or . However, this is not a
valid reading. A valid reading can only come from a phase to
phase circuit. The rotary field function is specified for use on line
(mains) systems only.
To perform a rotary field direction test, see Figure 5:
1. Attach one probe to the center probe holder on the back of the Tester
and grip the main body with one hand.
2. Attach both probes to the test points. If the red lead is 120 degrees
ahead of the black lead, is displayed. If the red lead lags the
black lead by 120 degrees, is displayed. In both situations the
voltage is shown on the display. If a phase rotation measurement is
not possible, no arrows will light but the voltage appears on the
display.
Note
You can verify the rotary field direction by reversing the two
probes and watching for an indication of a change in the field
direction.
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