Amprobe PRM-4 User manual

PRM-4
Phase Sequence and
Motor Rotation Tester
Users Manual
For detailed specifications and ordering info go to www.TestEquipmentDepot.com

English
PRM-4
Phase Sequence and
Motor Rotation Tester
Users Manual
PRM4_Rev001
© 2007 Amprobe Test Tools.
All rights reserved.

2
Limited Warranty and Limitation of Liability
Your Amprobe product will be free from defects in material and workmanship for
1 year from the date of purchase. This warranty does not cover fuses, disposable
batteries or damage from accident, neglect, misuse, alteration, contamination,
or abnormal conditions of operation or handling. Resellers are not authorized
to extend any other warranty on Amprobe’s behalf. To obtain service during the
warranty period, return the product with proof of purchase to an authorized
Amprobe Test Tools Service Center or to an Amprobe dealer or distributor. See
Repair Section for details. THIS WARRANTY IS YOUR ONLY REMEDY. ALL OTHER
WARRANTIES - WHETHER EXPRESS, IMPLIED OR STAUTORY - INCLUDING IMPLIED
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, ARE
HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM
ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion
or limitation of an implied warranty or of incidental or consequential damages, this
limitation of liability may not apply to you.
Repair
All test tools returned for warranty or non-warranty repair or for calibration should
be accompanied by the following: your name, company’s name, address, telephone
number, and proof of purchase. Additionally, please include a brief description of
the problem or the service requested and include the test leads with the meter.
Non-warranty repair or replacement charges should be remitted in the form of a
check, a money order, credit card with expiration date, or a purchase order made
payable to Amprobe®Test Tools.
In-Warranty Repairs and Replacement – All Countries
Please read the warranty statement and check your battery before requesting
repair. During the warranty period any defective test tool can be returned to your
Amprobe®Test Tools distributor for an exchange for the same or like product.
Non-Warranty Repairs and Replacement – US and Canada
Non-warranty repairs in the United States and Canada should be sent to a
Amprobe®Test Tools Service Center. Call Amprobe®Test Tools or inquire at your
point of purchase for current repair and replacement rates.

3
➊Phase rotation input terminals
➋Open phase indicators
➌Phase rotation indicators
➍Motor tester power switch
➎Motor tester power indicator
➏Motor rotation indicators
➐Motor rotation input terminals
M1 M2
BATT
TEST
M3
L1
A B C
L2L3
MOTOR ROTATION DETERMINED WHILE FACING MOTOR SHAFT
CAT
600V
MOTOR
ROTATION
TESTER
3-PHASE
TESTER
PRM-4
PRM-4
DO NOT CONNECT TO LIVE VOLTAGE!
1
4
6
3
5
2
7

4
PRM-4 Phase Sequence and
Motor Rotation Tester
CONTENTS
Safety Information ................................................................................... 5
Symbols Used in this Manual................................................................... 6
Introduction.............................................................................................. 6
Making Measurements ............................................................................ 7
3-Phase Rotation Test ........................................................................ 7
Open Phase Test.................................................................................. 7
Motor Rotation Test ...........................................................................8
Maintenance............................................................................................. 9
Battery and Fuse Replacement .......................................................... 9
Cleaning and Storage.........................................................................9
Specifications............................................................................................ 9
General Specifications ........................................................................ 9
Electrical Specifications .................................................................... 10

5
SAFETY INFORMATION
Warnings and Precautions
The PRM-4 Phase Sequence and Motor Rotation Tester conforms to
CSA 22.2-1010-1 and EN61010-1, CAT III 600 V.
To ensure safe operation and usage of this instrument, follow
instructions in this manual. Failure to observe Warnings may result in
SEVERE injury or death.
It is recommended for use in distribution level and fixed•
installations, as well as lesser installations, and not for primary
supply lines, overhead lines and cable systems.
Do not exceed the maximum overload limits per function (see•
specifications) nor the limits marked on the instrument itself.
Never apply more than 600 V ac rms between the test lead and
earth ground.
Inspect the tester, test leads and accessories before each use. Do•
not use any damaged part.
Never ground yourself when taking measurements. Do not touch•
exposed circuit elements or test probe tips.
Do not operate the tester in an explosive atmosphere.•
Exercise extreme caution when: measuring voltage >20 V // current•
>10 mA // AC power line with inductive loads // AC power line
during electrical storms // current, when the fuse blows in a circuit
with open circuit voltage >600 V.
Never replace a fuse with one of a different rating.•
Remove test leads before opening the case.•
Do not use in a manner not specified or the protection afforded•
by the instrument may be impaired.

6
SYMBOLS USED IN THIS MANUAL
Caution! Refer to the
explanation in this
Manual AC – Alternating Current
Caution! Risk of electric
shock DC – Direct Current
Earth (Ground) Canadian Standards
Association
Double Insulation or
Reinforced insulation Complies with European Directives
Do not dispose of this
product as unsorted
municipal waste. Conforms to relevant
Australian standards.
INTRODUCTION
The tester provides three functions in one unit, including open phase,
phase sequence and motor rotation indication. This tester is ideal for
installing conveyor lines, pump systems and interconnected drivers.
The PRM-4 is two measurement devices. One half measures the phase
sequence of a 3-wire system using the power of the system under
test. Using lamp indicators, it will indicate the 3-phase sequence or
it will indicate an open phase situation. The other half of the PRM-4
measures 3-phase motor rotation on an unpowered motor using the
PRM-4’s internal 9 volt battery. The unit will indicate whether the
motor shaft has clockwise or counter-clockwise rotation.
Features:
• Identifies 3-phase sequence and open phase check
• Motor shaft rotation
• Battery operated
• Meets EN61010 safety requirements
 Caution
Read all Safety Information before using this tester.

7
MAKING MEASUREMENTS
3-Phase Rotation Test
 Caution
This instrument only indicates that voltage is present, not the
voltage level. Verify the actual voltage with a multimeter. Using the
wrong voltage can damage a motor.
Connect the three color coded test leads to the 3-phase input1.
terminals, L1-L2-L3 also know as A-B-C or R-S-T. See Figure 1.
Connect the three color coded alligator clips to the terminals of2.
a 3-phase power source. The connection order is optional. Use
extreme caution in this high voltage situation.
Confirm that all three lights below the test lead inputs on the3.
PRM-4 are ON. If one or more of the three lights is OFF, there is an
open phase condition. Correct the power source problems before
proceeding (See Open Phase Test later in this manual). If the Open
Phase tests are good, the PRM-4 is defective. Repair or replace the
PRM-4 before proceeding.
If all three lamps are ON, check the phase rotation indication for4.
the rotation direction, clockwise () or counter-clockwise ()
indicator.
If the counter clockwise lamp is ON, reverse the connections of any5.
two of the three alligator clips for clockwise rotation. Use extreme
caution in this high voltage situation.
The phase sequence is correct for clockwise (6. ) rotation when
the clockwise lamp is ON and the power source terminals are
connected by the alligator clips to L1, L2, and L3. Remove power
and label the power source wires.
Open Phase Test
 Caution
The multimeter used for this test should be properly rated for the
circuit under test.
Connect a multimeter (set to VAC and the voltage range expected)1.
V input to the phase wire in question and the COM input to
neutral or ground to check the phase voltage. Use extreme
caution in this high voltage situation.
Verify that the two other phases are working properly and that2.
the 3-phase to phase voltages are correct. If a problem is found,

8
correct the problem before returning to the 3-phase rotation test.
Motor Rotation Test
This test can be used to verify the shaft rotation and the M1-M2-M3
connections or to determine the M1-M2-M3 connections on a motor
that is not marked.
 Warning
Make all connections with circuits unpowered. If the clockwise or
counterclockwise RED indicator is ON before rotating the motor
shaft, voltage is present. Stop measuring. Remove the test leads and
turn off the external power.
Use a multimeter to verify that no voltage is present on the motor1.
windings.
Connect the color coded test leads to the three motor input2.
terminals M1- M2-M3. Press the power button (See Figure 2). The
green indicator light will be ON.
Facing the motor shaft, hand rotate the motor shaft clockwise.3.
If the clockwise indicator (4. ) is ON, the M1-M2-M3 connections
are correct for clockwise rotation.
If the counterclockwise (5. ) indicator is ON, the M1-M2-M3
connections are correct for counterclockwise rotation.
If the motor rotation direction is wrong, reverse any two of the6.
M1-M2-M3 connections and repeat the test.
After 3-phase rotation and motor phasing are verified:
Turn off power at the source.1.
Connect the previously identified power wire L1 to motor wire2.
M1. Repeat the connections for L2 to M2 and L3 to M3. See Figure
3.
Inspect the connections for electrical safety.3.
The motor will rotate in the desired direction when power is
applied.
MAINTENANCE
If the PRM-4 appears to operate incorrectly, check the following
items:
Review the operating instructions to ensure the meter is being1.

9
used correctly.
Inspect and test the continuity of the test leads.2.
Make sure the battery is in good condition. Replace a low battery3.
immediately.
Check the condition of the fuses.4.
 WARNING
To avoid electrical shock, remove the test leads from the PRM-4 and
the test circuit before accessing the battery or the fuse.
Battery and Fuse Replacement
To access these parts, you must first remove the rear cover of
the PRM-4. The rear cover is held in place with two screws. After
removing the screws, you can easily remove and replace the battery
or a fuse. To replace a fuse, pry it from the retaining clips using a
small screwdriver. See Figure 4.
Use the following replacement parts:
Battery: 9 V NEDA 1604, IEC 6F22
Phase Sequence Fuse: Fast Blow 200 mA/600 V (Amprobe FP900)
Motor Rotation Fuse: Fast Blow 100 mA/250 V (Littel Fuse 216.100)
Cleaning and Storage
Periodically wipe the case with a damp cloth and detergent. Do not
use abrasives or solvents. Remove the battery if the tester is not in use
for periods longer than 60 days.
SPECIFICATIONS
General Specifications
Operating Environment: 0 °C to 40 °C at <80 % R.H.
Power: Single standard 9 V battery, NEDA 1604, JIS 006P, IEC 6F22
Battery life: Approximately 200 hours typical with carbon-zinc battery
Low battery indication: The BATT LED does not come ON when TEST
button is pressed
Dimensions: 153(L) x 72(W) x 35(D) mm. (6.02 x 2.83 x 1.37 in)
Weight: Approximately 218 g (7 oz) including battery
Environment: Indoor use
Altitude: 2000 m (6561 ft.)