ALL-TEST
PRO
®
31 User Manual
©2011, ALL-TEST
Pro,
LLC
www.alltestpro.com
rev 2011-11F
5
I.
Introduction
The light-weight, hand-held instrument can be used for immediate detection of winding shorts,
insulation to ground faults, cable faults and more on AC/DC electric motors, transformers, coils,
machine tool equipment, linear motors and much more. Testing can be performed at the motor
connection box, the disconnect, or motor control center hundreds of feet away.
The ALL-TEST
PRO®
31 (AT31) is designed to provide a simple test method for:
·
troubleshooting faults
·
commissioning new and rebuilt machines
·
verifying quality assurance in electric motors and other wound equipment.
The patented tests performed for early winding fault detection:
·
winding impedance test
·
phase angle
·
I/F current frequency response tests
·
EMI (Electro-Magnetic Interference) test for detection of low-level EMI currents that can
affect readings and may be the result of other faults within the motor circuit
Note: The ALL-TEST PRO® 31 provides real time measurements of the on-going test. When
combined with the ALL-TEST IV PRO™ provides the most comprehensive off-line motor analysis
system available at any price.
Insulation Resistance to ground: To prevent electrical shocks and to assure safety of personnel the AT31
provides an insulation to ground test. The insulation resistance test provides either 500 or 1,000 V
DC
, to
measure the insulation resistance up to 500 Meg-Ohm.
