ALL-TEST PRO AT31 Bedienungsanleitung

ALL-TEST Pro, LLC

ALL-TEST PRO® 31

Table of Contents

I. Introduction.....................................................................................................5

II. Safety.............................................................................................................6

Instrument Warnings and Considerations .........................................................6

General Safety Considerations .........................................................................6

III. ALL-TEST PRO® 31 Kit Components.......................................................7

Instrument Operation .......................................................................................7

Input Section................................................................................................7

Display Section............................................................................................8

Indicator Light Section.................................................................................8

Display Screen.............................................................................................8

Keypad Section............................................................................................9

Instrument Test Leads................................................................................10

IV. Testing a Three Phase Induction Squirrel Cage Motor..........................11

Operating Procedure 3-Phase Motors.............................................................11

Winding Test .................................................................................................11

Turn the Instrument On..............................................................................12

Select the Motor Test .................................................................................12

Observe/Record the Test Data....................................................................12

ERROR CODES........................................................................................13

Continue with Other Phases .......................................................................14

Continue with Last Phase ...........................................................................15

Phase Balance Test ........................................................................................17

Insulation Resistance Testing.........................................................................20

Rotor Test......................................................................................................22

Bar Test .....................................................................................................22

Wave Form Test.........................................................................................23

Changing the Motor Test Frequency ..............................................................24

V. Additional Functions and Features...........................................................26

Electro-Magnetic Interference (EMI): ............................................................26

Resetting the Unit ..........................................................................................27

VI. Charging Your ALL-TEST PRO® 31.......................................................28

VII. Data Interpretation Three Phase Motors................................................29

Data Interpretation Tables..............................................................................29

Additional Data Interpretation Considerations Three Phase Motors............30

Test Location .............................................................................................30

Rotor Windings..........................................................................................30

Confirming Suspected Winding Shorts.......................................................30

Method 1: Rotor Compensation..................................................................31

Method 2: Variable Frequency Test............................................................31

VIII. DC Motor Testing....................................................................................32

Testing an Assembled DC Motor ...............................................................33

Series DC motor.........................................................................................33

Compound or Shunt DC motor...................................................................33

Testing Shunt Field ....................................................................................33

Armature Testing .......................................................................................33

DC Motor Analysis........................................................................................34

IX. Additional Test Methods...........................................................................35

Wound Rotor Motors.....................................................................................35

Wye-Delta Motors .........................................................................................35

Capacitor Testing...........................................................................................36

X. Tech Support and Information...................................................................37

XI. Available Accessories for the ALL-TEST PRO® 31...............................37

XII. Training Class...........................................................................................37

ALL-TEST PRO®31 User Manual

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 VDC, to

measure the insulation resistance up to 500 Meg-Ohm.

ALL-TEST PRO®31 User Manual

II. Safety

CAUTION: The AT31 is designed to test de-energized equipment safely and quickly.

Improper application of the AT31 on live circuits is a danger to the user and will result in

the destruction of the testing circuit, requiring instrument replacement.

Instrument Warnings and Considerations

The ALL-TEST PRO® 31 is a CE registered instrument.

The following is a list of considerations for equipment life and accurate data collection:

Ensure that all power has been removed from the circuit being tested, including static power

stored in capacitors –Discharge all capacitors being tested.

Attaching the AT31 to live voltage will destroy the unit and void the warranty.

Do not attempt to change the batteries. Contact your distributor of the AT31, ALL-TEST Pro. LLC

at 860-399-4222 or via email, support@alltestpro.com, to have the battery pack replaced.

Do not open the instrument. Electrostatic charges may damage surface mount electronics. Please

contact your vendor or ALL-TEST Pro authorized repair center.

Use only the supplied charger for charging the instrument. It is an integral part of the charging

circuit. Using the wrong charger will damage your instrument.

General Safety Considerations

Following are general safety considerations for using the AT31 motor tester:

The AT31 is an off-line motor tester. All power and residual power must be disconnected. It

provides a safe method of testing your electric motors.

Follow all safety rules of your company and OSHA (or country equivalent) for off-line testing

methods, including appropriate Personal Protective Equipment (PPE). Improper or unsafe operation of

the equipment is the sole responsibility of the user.

For MCA testing, the AT31 sends out a low voltage, high frequency signal not harmful to the

technician or most electronic equipment (variable frequency drives and soft starts). However, electronic

equipment and personnel must observe appropriate safety considerations (disconnect electronic

equipment) when performing the insulation to Ground resistance test (Meg-Ohm) test.

ALL-TEST PRO®31 User Manual

III. ALL-TEST PRO® 31 Kit Components

Figure 1: AT 31 Kit

The AT31 Kit contains all of the necessary components necessary to test most electrical machinery:

A. ALL-TEST PRO® 31 instrument

B. Batteries (installed)

C. Test leads and clips

D. Charger (115 or 230 Volt)

E. Manual on CD Rom

F. Carrying Pouch

G. Reset Key (Only sent with units before Serial number 2029)

Instrument Operation

The instrument is divided up into three working areas:

1. Input Section

2. Display Area

3. Keypad

Input Section

The input section provides all the external connections to the ALL-TEST PRO® 31

A. Test lead port

B. Charger port

C. Ground test lead port for Insulation to Ground

Measurements

D. Reset Button (Serial number 2029 and higher)

AB C

ALL-TEST PRO®31 User Manual

Display Section

The display section is divided into 2 sections:

1. Indicator Lights

2. Display Screen

The Indicator Lights (section 1) informs the operator when an operation or test is being performed.

The Display screen (section 2) allows the operator to select tests to be performed by the AT31.

Indicator Light Section

1. Charging light –Indicates that the unit is charging, light is illuminated red while charging, light

is green when fully charged.

2. Test indicator light –Light is illuminated green when the unit is testing

3. Insulation Test indicator light –The light illuminates yellow when the instrument is testing

insulation resistance. Caution –Applied voltage is 500 or 1,000 Volts DC.

Display Screen

The display screen has individual icons to select and perform the various motor and winding tests.

ALL-TEST PRO®31 User Manual

1. Z/ψIcon performs the Impedance (Z), Phase Angle (ψ), Current/Frequency (I/F) and Phase

Balance tests (used to identify developing winding faults).

2. ROT Icon performs the Rotor test (used to find squirrel cage induction motor rotor faults).

3. INS Icon performs the Insulation to ground resistance test (used to verify that the insulation to

ground resistance is sufficient to prevent electrical shock).

4. Battery charge level indicator. A fully charged battery will have 7 bars (it is recommended to

keep the AT31 on charge when not in use to ensure proper operation).

5. PWR OFF Icon turns the instrument off (the AT31 will automatically shut-off after about 5

minutes).

6. EMI Icon tests for EMI signals within the Motor System that could cause errors in the AT31 test

results.

Keypad Section

The keypad section provides keys to operate and control the functions of the AT31.

ALL-TEST PRO®31 User Manual

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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