Megger PPX30, User Manual, Page: 71 / 84

NOTE: When testing armatures, a reference will be needed. A second operator should be available to start the
process and obtain the reference waveform. When a satisfactory reference is saved and the zero-start override has
been set, a single operator can complete the process.
WARNING: During this process, the zero-start override icon (ZS Override)will become available. When
the zero-start override feature is enabled, target test voltage levels will be instantly applied to the test
leads when a test begins. Ensure that no one contacts the tester leads to avoid injury during testing.
10. Press the power pack’s
Test (PTT)
button (or footswitch or fixture Test button) and ramp up the voltage to the
test level (500 volts in this example). With the waveform stable and a minimum of five pulses applied, release the
Test (PTT)
button (or footswitch, or fixture Test button).
NOTE: When testing armatures, apply the surge pulse until you see the EAR graph add the new bar information.
Releasing the PTT button (or footswitch, or fixture button) too soon can result in a collapsed waveform and errant
test data being collected.
11. In the example below, a satisfactory waveform is acquired for the first set of bars so it can be saved as the
reference.
12. Touch the Set Reference icon then enter a reference name using the on-screen keyboard provided. Touch Done
to save.
Fig 59:
Armature bar test; acquiring the test reference.
13. From this point, the process is essentially the same as the standard process for Surge testing single coils. Refer to
the “Surge Testing Procedure for Single-Coil Mode” found in the Baker DX User Guide for details.
Using Power Packs with Baker DX Testers
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