Associated Equipment BEST 6044 Instruction Manual

1
ASSOCIATED
BEST 6044
BATTERY TESTER
OPERATOR AND SAFETY MANUAL
The BEST 6044 is designed to test electrical systems on 12, 12/24, and 24 volt vehicles. It can test and evaluate
starters, batteries, alternators, regulators, wiring connections, and other electrical equipment in the low voltage circuits
in the vehicle. Before operating this unit, thoroughly familiarize yourself with the safety instructions included in this
booklet and in the service manual.
+-+-
External Voltage Amp Probe
MODEL 6044
BATTERY ELECTR CAL SYSTEM TESTER
DOWN
UP
ASSOCIATED
TEST SELECT ON
BATTERY ALTERNATOR
M N.
VOLTS
FAULT LOAD
ON
MAX.
AMPS
LOAD
AMPS
LOAD
SETT NG
START TEST
RESET
+ -
DC
STARTER
TABLE OF CONTENTS
Features.......................................................................... 1
Safety instructions........................................................... 2
Battery Load Tests .......................................................... 3
Starter Tests ................................................................... 5
Charging System Tests................................................... 5
Troubleshooting Hints ..................................................... 7
Assembly Instructions ..................................................... 8
FEATURES OF THE BEST 6044 INCLUDE:
Large, easy to read, LED digital AMPS and VOLTS
meters. The VOLTS meter reads voltages to ±40
volts DC when reading the differential voltage and
up to 40.0 volts DC for the battery voltage. The
AMPS meter reads DC currents up to 999 amps.
The input impedance of the differential voltage is 2
megohms for accurate testing of solid state
circuits.
The load is rated 500 amps on 12 volt batteries for
load testing batteries up to 1000 CCA capacity.
Fixed loads designed to insure longer life.
Amp probe zero button allows for maximum
accuracy in AMPS reading.
LOAD ON light indicates the load is actuated and
serves as a reminder to not disconnect leads while
load is on.
AMPS meter reads both + and - amps for easy
diagnosis of leakage current problems.
Unit monitors the voltage ripple letting you know
when alternator output diodes have failed.
The electronic circuits are protected against
reverse voltages caused by connecting leads
incorrectly.
The electronic circuit board has a protective
coating to prevent damage and meter inaccuracy
due to moisture and dirt.
Heavy duty leads are single extended so that they
may be used for testing at points up to 15 feet
apart.
The clamps on the heavy duty lead are vinyl
dipped and have a flexi-spring stain relief to
prevent cable damage. Solid copper jaws provide
better electrical conduction and are field
replaceable.
Heavy duty leads have internal tracer lead wires
for voltage reading the battery voltage. These
leads should not be attached to any voltage source
that could rise above 45 VDC.
The light gauge voltage sensing leads (red and
black) have small test clips to allow testing at
points where the heavy duty leads can not reach.
Use the leads when the unit is set for the external
voltage (differential voltage) reading. The leads
can test points in a vehicle up to 15 feet apart and
read voltages up to 40 VDC.
The inductive AMP PICKUP has 10 foot long lead
to allow for testing in hard to reach areas.
All leads are long enough to test trucks, "high-rise"
four wheel drive, or off road vehicles.
The optional cart has a long wheel-base for
greater stability when moved over rough surfaces
or cracked floors.
Optional printer: prints a report of all the results of
any test performed by the 6044.

2
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS. The safety information contained herein should be
reviewed every time the unit is used.
BATTERY SAFETY:
ALWAYS WEAR EYE PROTECTION WHEN WORKING NEAR A
BATTERY.
CAUTION: The electrolyte in automotive batteries is
sulfuric acid, which is capable of causing severe damage to skin,
eyes, and clothing. When contact with battery acid occurs, proceed
as follows:
1) Eyes: Force open and flood with cool running water at least for
10 minutes, then see a doctor. Never use eyes drops or other
medication before seeing a doctor.
2) Skin: Remove contaminated clothing and flood skin for at least
10 minutes with clear, cool water.
While batteries are being charged or tested, an explosive gas
mixture forms inside each cell. Some of this gas escapes through the
vent holes in the filler caps and may remain around the battery in an
explosive condition. Sparks or flames igniting this gas mixture will
burn back through the vent hole and explode inside the battery cell.
Such an explosion is dangerous not only because of its own force,
but also because of the acid electrolyte which could spray onto
anything in the vicinity.
TO PREVENT EXPLOSIONS:
1) Use well ventilated areas for charging and testing batteries.
2) Allow no smoking, sparks or open flames near batteries being
charged, tested or batteries recently charged or tested.
3) Do not break live electrical circuits at the terminals of batteries
because a spark may occur at that point causing an explosion.
Always turn battery chargers or tester OFF before connecting or
disconnecting the clamps from the battery terminals.
PERSONAL PRECAUTIONS:
1) Wear complete protection and avoid touching eyes while
working near battery.
2) NEVER smoke or allow a spark or flame in the vicinity of battery
or engine.
3) Be extra cautious to reduce risk of dropping a metal tool onto a
battery. The tool may spark or short-circuit the battery or other
electrical parts which may cause an explosion.
4) Remove personal metal items such as rings, bracelets,
necklaces, and watches when working with a lead-acid battery.
A lead-acid battery can produce a short-circuit current high
enough to instantly weld a ring or the like to metal, and cause
severe burn.
5) Spilled acid: Neutralize with a solution of baking soda ( 1 pound
per gallon of cold water ) or household ammonia (1 pint per
gallon of cold water)
VEHICLE SAFETY:
1) Keep your body, clothing, and test leads away from all moving
parts of the vehicle. Remember, electric fans may start at any
time.
2) Avoid hot engine parts.
3) Engine exhaust contains deadly carbon monoxide gas. Run
engine only in a well ventilated area with exhaust gases
ventilated outdoors.
4) When running engine tests, be sure that the vehicle is in "park"
or "neutral" and the parking brake is on when starting the
vehicle. Block wheels to prevent vehicle movement.
5) Do not connect any test lead to carburetor, fuel lines, or sheet
metal parts of frame.
TESTER PRECAUTIONS AND NOTES:
1) Only very minor arcing should occur when connecting the tester
to a battery. If any thing more than this occurs disconnect unit
and have qualified service personnel examine the unit.
2) Never block ventilating holes on the sides, front, back, or the
bottom of the unit. This could lead to excessive heat on the
cabinet.
3) Some smoke or odor may occur on the first use on the tester or
if it has not been used for a long period of time, this is normal.
4) Never use the load more than twice in a 5 minute period. If the
unit becomes over heated it will display “Hot” until it has cooled.
For maximum life, always let the unit cool before running a
second load test.
5) For the ammeter to read +amps, attach current probe so arrow
on probe points in direction of current flow (from positive to
negative). For negative values the last decimal point will light.
6) Residual magnetism in the Amp Probe may cause it to read
incorrectly. Therefore, the Amp Probe should be zeroed before
each use. This can be done with the blue button on the amp
probe.
7) In the booklet, the word "positive" refers to the red clamp or
lead. The word "negative" refers to the black clamp or lead.
8) "Positive" when referring to a battery terminal will mean the one
marked Pos, P,(+).
9) "Negative" when referring to a battery terminal will mean the
one marked Neg, N,( -).
FIGURE 1
6V
BATTERY 2
+ -+ -
6V
BATTERY 1
POS (+)
NEG (-)

3
BATTERY LOAD TESTS
TESTING 12 VOLT BATTERIES:
The standard battery load test is to apply a load on the battery
equal to ½ the cold cranking amp (CCA) capacity of the battery
for 15 seconds. Both the voltage and temperature of the
battery under load determine whether a battery is good or not.
Before testing the battery be sure that:
Battery terminals are clean.
The battery does not have any physical damage.
The battery is not frozen.
FIGURE 2
+ -
12 VOLT
PROPER TEST PROCEDURE IS AS FOLLOWS:
1) Attach red and black heavy duty leads to the positive and
negative battery posts (see figure 2). Twist or rock clamps back
and forth several times to make a good connection.
2) The “Battery” LED should now be on. Press “Start Test” [4]
button.
3) 300 should now be displayed in the Amp display along with the
load amps LED. Adjust the value to read ½ the CCA reading of
the battery using the up and down arrows. The minimum value
is 70A.
4) Once the proper load current is displayed press the “Start Test”
[4] button again; the tester will then start the battery test.
5) If the battery voltage is below 12.4V prior to the test the display
will show “LO”. If the voltage is above13.0V then the unit will
apply a proportional load current to remove the surface charge
before starting the load test.
6) The testing unit will apply a load current for 15seconds
displaying the current and the voltage while the test is running.
The load LED will be lit while this test is in progress. The load
current will vary some as it tries to keep the correct load current
with the varying battery voltage. The battery test LED will also
flash.
7) After the test is complete, the tester will alternate in the voltage
window between the minimum voltage reading during the
battery test and the present open circuit battery voltage. If the
minimum voltage was below 9.6V then it will also flash “Bd”
The minimum acceptable voltage for a battery at the different
temperatures is as follows:
BATTERY TEMPERATURE COMPENSATION 15 SECOND LOAD
TEST
°C 21↑ 16 10 4 -1 -7 -12 -18
°F 70↑ 60 50 40 30 20 10 0
MIN.
VLT
9.6 9.5 9.4 9.3 9.1 8.9 8.7 8.5
If the CCA of the battery is not known check vehicle manufacturer's
recommendation for the proper battery CCA rating and test the
battery using that value.
Warning: NEVER TRY TESTING A FROZEN BATTERY.
TESTING 12/24 VOLT SYSTEMS:
For best results in a 12/24 volt system that has batteries connected per the diagrams below, each battery should be tested separately and the
connection between the batteries tested at the same time. Both battery tests should be run as described in the previous section.
FRAME
6044
+ -
BATTERY 2BATTERY 1
+ -
12V12V
FIGURE 3
BATTERY 1
12V
+ -
BATTERY 2
FIGURE 4
12V
+ -
RED
LEAD
6044
FRAME
BLACK
LEAD
PROPER TEST PROCEDURE IS AS FOLLOWS:
1) Attach heavy duty leads to Battery 1 and run battery load test.
Evaluate the results. (See figure 3)
2) Attach the negative heavy duty lead to the negative terminal of
Battery 2. Attach the positive heavy duty to the negative
terminal of Battery 1. (By attaching at that point and not at the
positive terminal of Battery 2, we will check the connection
between the batteries at the same time.) Attach the positive
external (differential) voltage lead to the negative terminal of
Battery 1 and the negative external (light gauge) lead to the
positive terminal of Battery 2. (See figure 4)
3) Run the battery load test on battery 2. After the test is complete
press the down arrow button this will display the voltage that
was read across the jumper during the battery test. This value
should be less than .2V if not check the jumper and
connections to the battery. Subtract the jumper voltage from
the minimum voltage displayed for the battery test and evaluate
the results.

4
USE THIS SECTION FOR BATTERY
TESTING IF YOUR 12/24 VOLT SYSTEM
LOOKS SIMILAR TO THIS:
 One six volt battery by itself cannot be tested with this unit. It
will not provide enough voltage under load to allow the digital
circuitry to work.
 Please note: When two six volt batteries are connected in
series, the voltage of the array is 12. The CCA rating of the
series does not double. It is the same CCA as either of the
individual batteries. (If you have two, 500 CCA, 6 volt batteries
in series, it is equivalent to a 500 CCA, 12 volt battery and
should be tested with a 250 amp load.)
 Both the heavy duty and light gauge leads will be used in this
test (see figure 5).
1) Attach the positive heavy duty lead to the positive terminal
of Battery 1 and the negative heavy duty lead to the
negative terminal of Battery 2. Connect the external
voltage leads; red lead to positive terminal of Battery 2 and
the black lead to the negative terminal of Battery 2.
2) Proceed with the battery test. After the test evaluate the
results. If the battery group as a whole does not pass then
press the down arrow button to read the minimum voltage
on Battery 2. See the table below for the minimum
voltages of a 6 volt battery.
3) To determine the battery voltage of Battery 1 just subtract
the external voltage reading from the minimum overall
voltage.
4) If the battery voltage on Battery 2 looks good but the
overall battery voltage is too low, check the jumper
voltage. This is done by repeating step 1 but connect the
external voltage leads across the jumper, positive lead to
negative terminal of Battery 1 and negative lead to the
positive terminal of Battery 2. After testing read the
external voltage it should be less than 0.2V.
BATTERY TEMPERATURE COMPENSATION 15 SECOND LOAD
TEST
°C 21 ↑ 10 2 -4 -9 -15
°F 70 ↑ 50 35 25 15 5
MIN.
VOLT
4.8 4.7 4.6 4.5 4.4 4.3
 Please note that the test described above is not the easiest way
to run a test on two batteries in series, but it is the most
accurate. If you were to test the batteries and take only one
voltage reading from the positive terminal of Battery 1 to the
negative terminal of Battery 2, there are problems that could
remain hidden or cause excessive replacement costs.
BLACK
LEAD
BATTERY 4
BATTERY 1
BATTERY 3
6V6V
+ -
6V
FIGURE 5
+ -
+ -
BATTERY 2
RED
LEAD
6V
+ -
+-
 The voltage reading under load from the positive terminal of
Battery 1 to the negative terminal of Battery 2 is the sum of the
voltage drops across Batteries 1, 2, and the cable jumper.
 Total voltage = B1 voltage + B2 voltage + jumper voltage drop
(see figure 6).
 If you had two good batteries and a bad jumper connection, the
total voltage may be less than acceptable. If the batteries were
replaced, the new ones may test bad due to the bad
connection. Replacing or cleaning a bad jumper cable is
cheaper and easier than replacing batteries if that is all that is
needed.
In another situation, you may have one good battery, a good
jumper connection, and one bad battery. If the good battery
voltage is high enough to offset the bad battery voltage, you will
have no indication of the potential problem. If the good battery
voltage is not high enough to offset the bad battery voltage, the
group may test bad and both batteries replaced when only one
of the needs to be.
TESTING 24 VOLT SYSTEMS:
 24 volt batteries may not be load tested with this unit. Most 24 volt
systems are made up of 2 12V batteries. See above for testing.
 The unit is capable of testing 24 volt alternator and the starting
systems.
JUMPER
FIGURE 6
B1 VOLTAGE
6V6V
BATTERY 2
+ -
BATTERY 1
+ -
B2 VOLTAGE
FIGURE 7
LOAD
TEST
NO
+ -
24 VOLT

5
STARTER TESTS
 Current draw of the starter, battery voltage, and voltage drop of
leads can be measured when connected as shown (See figure
8).
 This unit is designed to capture the maximum (peak) starting
current , the running starting current and the minimum battery
voltage when the vehicle is started.
 Review the Safety section in the front of this manual.
1) Attach the heavy duty leads to the battery as shown.
2) Press Test Selection [2] button until the starter LED is lit.
3) Press Start Test [4] button Starter LED will start to flash.
Attach the Amp Probe around the lead from the positive
battery terminal to the starter. If that cable is not
accessible, it may be placed around the ground cable that
runs from the frame or engine block to the negative battery
terminal.
4) Be sure that all the lights and accessories are turned off.
3) Start the engine. Under no condition should you crank
more than 10 seconds at a time. The tester will alternate
the amps display showing the maximum cranking current
with the “MAX. AMPs” LED lit and the starter running
current at this time in the amps display. It will also display
the minimum battery voltage with the “MIN. VOLTS” LED lit
alternating with the actual battery voltage in the voltage
display.
4) Minimum acceptable voltage for most vehicles while
cranking is 9.6 volts. Typical starter running currents
(this would be the smaller current displayed) for vehicles
are:
4 cylinder gas engine--up to 175 amps
6 cylinder gas engine--up to 225 amps
8 cylinder gas engine--up to 250 amps
8 cylinder diesel engine--up to 650 amps
 The vehicle service manual should be consulted for more
detailed information. While the vehicle is starting, you should
listen for high pitch or low growling sounds that may indicate
bearing or other problems.
 Connections between the battery and starter and between the
battery and frame can also be checked at this time.
STARTER
MOTOR
STARTER
SOLENOID
FRAME
FRAME
+ -
BLACK
LEAD
RED
LEAD
1
2
3
4
5
6
FIGURE 8
Excessive voltage drop in either cable caused by loose or corroded
connections, undersized, or broken wires may be the problem, not
the starter.
Testing procedure using the Eternal Voltage leads: Review safety
section in the front of the manual. (see figure 8)
1) Attach tester to battery as shown. Press Test Selection [2]
button until the Starter LED is lit: press Start Test [4] button.
2) Attach positive external lead to positive battery terminal (1).
Attach negative (light gauge) external lead to starter solenoid
where the lead from the battery terminates (2).
3) Start the vehicle, press the up arrow this will display the
maximum differential (external) voltage reading during the
starter test.
4) Repeat the same procedure, checking the voltage drop across
the solenoid, (negative lead to starter side of solenoid), (2 to 3).
5) Repeat again, checking the voltage drop between the solenoid
and the starter. (Positive lead at solenoid, negative lead at
starter.) (3 & 4).
6) Repeat again, checking the ground cable from the battery to the
engine block. (Positive lead to engine block, negative lead to
battery negative terminal.) (5 & 6).
7) Acceptable voltage drop on any wire lead should be 0.2 volts or
less. Voltage drop across the starter solenoid should 0.3 volts
or less. Check vehicle service manual for further details.
CHARGING SYSTEM TESTS
 Please review all the safety instructions in the front of this
manual before running these tests.
 Charging problems can be caused by a number of different
things. These can include loose belts, defective diodes or
stators, defective regulators, corroded or loose connections or
defective diode trios (GM cars).
 Undercharging will shorten battery life and may not provide the
proper charge to start the vehicle. Overcharging will cause
excess water usage in the battery and shorten battery life.
 Proper charging voltage and current from the charging system
to the battery is important for the longest life and maximum
performance.
 The proper end of charge voltage will depend on the type of
battery installed by the manufacturer and ambient temperature
of the charging system.
● A conventional battery (lead-antimony ) will require
charging voltages up to about 14.5 volts.
● A recombination battery or low maintenance battery may
require charging voltages up to about 14.8 volts.
 Voltage specifications will vary from manufacturer to
manufacturer. The service manual for the vehicle should be
consulted for exact charging specifications.
TO
ACCESSORIES
FRAME
+ -
BLACK
LEAD
RED
LEAD
ALTERNATOR
FRAME
FIGURE 9
It is also important that the charging system be capable of putting out
it's rated current. If the electrical load, (lights, blower, power
accessories, etc.) in the vehicle is more than the output of the
alternator, the battery will discharge to provide the needed current.
The battery may become discharged and will not recharge until some
of the load is turned off. This type of discharge/charge cycle will
greatly shorten the life of the battery. Therefore, output current as
well as output voltage of the charging system should be checked.
NOTE: A check of the charging system should include a check of the
battery cables to ground and to the alternator to determine bad
connections.

6
ALTERNATOR TEST SET UP:
1) Connect tester to battery as shown in (see figure 9). Press the
Test Selection [2] button until the Alternator LED is lit. Connect
Amp Probe around positive output cable of alternator. If wires
split off to feed power to accessories, the pickup must be
placed over the wires between the point of the split and the
alternator. Do not place the pickup closer than 6 inches to the
alternator or the current readings may be affected by the
magnetic field of the alternator.
2) Make sure all accessories are off in the vehicle.
4) Start vehicle and allow the engine a few seconds to stabilize the
voltage. Press the Start Test [4] button.
REMEMBER: Charging systems in a vehicle will compensate
for ambient temperatures by increasing the charging voltage at
low temperatures. Check the vehicle service manual for proper
charging voltages at low temperatures.
ALTERNATOR TEST:
1) The tester will first check the battery voltage; it should be
in the range of 13.0V and 14.8V, older vehicles may have
slightly higher voltages. If the voltage is below this the
tester will display “LO” with the FAULT LED lit at end of
test. If the voltage is above the 14.8V then it will display
“HI” with the FAULT LED lit at the end of the test.
2) After checking the voltage, the unit checks the ripple on
the Alternator if the tester determines the ripple to be too
high an indication of a bad diode or stator problem then it
will display “HIA” with the FAULT LED lit at end of test.
3) After the no load test the unit will apply a 70A load, the
operator should see the current increase in the amp
display to reflect this. The test then checks the voltage on
the battery again to make sure it falls in the range
mentioned above. If the unit is above the 14.8V the tester
will display “HI’ with the FAULT LED on. If the voltage falls
below the 13.0V the unit will flash the minimum voltage
and turn on the FAULT LED. At this point it is up to the
technician to determine due to the size of the alternator or
the RPM of the alternator if this is a problem. If the
voltage was within the recommended range of the test it
will display “Good” and the min voltage reading during the
test.
MEASURING CURRENTS and DIFFEREINTIAL VOLTAGES:
To use the Amp Probe and the Differential Voltage leads when not doing a standard test take the following steps:
1) Make sure the differential voltage leads and the amp probe are not connected. The 6044 zero’s these two items on power-up so any
voltage reading on them now will be considered zero.
2) Connect the unit to the battery. (see figure 10)
3) Connect/install Differential Voltage leads and Amp-Probe into there respective jacks. Amp-probe should not be around any cables at this
time, this would cause the amp-probe to use amp reading at this time to be zero.
4) Turn on the Amp-Probe and press the blue auto zero button on the front. This will remove any memory of magnetism left in the core and
should be pressed before any test using the amp-probe
5) Press Test Selection [2] until the Starter LED is lit.
6) Press Start Test [4] the Starter LED should start flashing.
7) Press the up arrow; now the Differential (external) Voltage will be displayed in the voltage window and the Amp-Probe reading will be
displayed in the Amps window.
8) For negative values the right most decimal point will be lit in the display (235 .) .
Measuring Maximum values with the Amp-probe and Differential Voltage leads:
1) Make sure the differential voltage leads and the amp probe are not connected. The 6044 zero’s these two items on power-up so any
voltage reading on them now will be considered zero.
2) Connect the unit to the battery. (see figure 10)
3) Connect/install Differential Voltage leads and Amp-Probe into there respective jacks. Amp-probe should not be around any cables at this
time, this would cause the amp-probe to use amp reading at this time to be zero.
4) Turn on the Amp-Probe and press the blue auto zero button on the front. This will remove any memory of magnetism left in the core and
should be pressed before any test using the amp-probe
5) Press Test Selection [2]until the Starter LED is lit.
6) Press Start Test [4] the Starter LED should start flashing.
7) Press the down arrow; the unit is now in the record mode it will look for the maximum and minimum differential voltages and the peak
current measured on the amp-probe. The display will show the active readings on the amp-probe and the differential leads.
8) After testing is done press the Test Select [2] button: the voltage display will now alternate between the maximum and minimum voltage
values recorded while testing, the “MIN VOLTS” LED will lit when displaying the minimum voltage value. The Amp display will show the
maximum current recorded by the amp-probe and light the “MAX. AMPS” LED.
9) To reset press the Test Select [2] button.
RED
LEAD
BLACK
LEAD
+ -
FRAME
FIGURE 10

7
The AEC 132-0137 (6043) Amp-Probe may also be used independently of the 6044. Plug the insulated jacks into a standard digital Multimeter and
set the meter for DC millivolts (mV); the Amp-Probe reads 1mV = 1 Amp. If the Amp-probe needs to be used for AC current just set the Multimeter
to ACV (AC volts).
6044 TROUBLESHOOTING HINTS:
• Was the unit connected with the correct polarity?
• The unit needs at least 7.5V from the battery to operate correctly if the voltage drops below this level the display may go blank or have an
erratic display.
• Is the battery in the Amp-probe good?
• Is the unit displaying “HOT” it will not run the battery test when the unit is hot, let cool?
• The differential leads(external leads) and the amp-probe are zeroed at power up if a voltage or current is present at this time then those
values are considered zero, and can cause errors in further readings by those devices/items. The zero value can be checked by installing
the amp-probe and pressing the zero button and connecting the differential leads and then shorting them together then placing the unit in
the display mode. This is done by pressing Select Test [2] until the starter LED is lit, then pressing Start Test [4] button (starter Led will be
flashing) and then pressing the up arrow. At this time the values in the amp and voltage display should be reading very close to zero. If
not, leave the amp probe and differential leads as they are and disconnect the unit from the battery and reconnect (resetting power to the
unit) this should zero the devices.
ASSOCIATED EQUIPMENT CORPORATION
5043 Farlin Avenue
Saint Louis, Missouri 63115
[phone]
www.associatedequip.com
W2312 REV. 02/19/09 027-0837(c)