ALL-TEST PRO
®
31 User Manual
©2011, ALL-TEST Pro, LLC www.alltestpro.com rev 2011-11F 10
1. Up direction and MODE key returns the AT31 display screen to the main menu.
2. F1/ON and Left direction key turns the AT31 on and moves the curser across the display screen
toward the left.
3. ZERO /OK (Selection) key selects which test to perform and provides reference selection to
calculate % difference of the measured impedance value.
4. Down direction and TEST key toggles between display screens and performs selected tests.
5. Right direction and F2/Hz key allows the operator to change the test frequency for the winding
test and moves the cursor across the display screen to the right.
Instrument Test Leads
The ALL-TEST PRO® 31 uses a 15 pin DB connector for winding testing. The red test lead is the
output and the black test lead, is the return. For insulation testing, the yellow test lead should be
connected to ground.
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