BatteryMINDer
®
INSTRUCTION MANUAL
Model 12248-AA-S1
BatteryMINDer®
Model 12248-AA-S1*
Charger / Maintainer /
Desulphator-Conditioner
VDC Electronics, Inc.
147 D Woodbury Rd.
Huntington, NY 11743
www.vdcelectronics.com
techsupport@vdcelectronics.com
*For use with Aviation Type 12-V Batteries ONLY.
Requires proper installation of Battery Temperature
Sensor (ABS-248 - supplied) and proper battery type
selection.
READ AND SAVE THESE INSTRUCTIONS
Rev. F-103007 P/N VDC12248AA-S1-MNL
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
Model 12248-AA-S1
TABLE OF CONTENTS
Safety Instructions...................................................................................................................... 3
Preparing To Charge................................................................................................................... 5
Charger Location......................................................................................................................... 5
DC Connection Precautions....................................................................................................... 6
Qualifying Your Battery: ............................................................................................................. 8
Testing A Filler Cap Or Manifold-type Lead Acid Battery........................................................ 8
Testing With A Hot/Cold Calibrated Hydrometer Tester.......................................................... 10
Testing A Sealed, Agm Or Gelled-type Lead Acid Battery ..................................................... 10
Unit With Call-outs ..................................................................................................................... 12
Simplified Operating Instructions ............................................................................................. 13
LED Indicator Functions ............................................................................................................ 14, 15
Detailed Operation Instructions ................................................................................................ 16
Temperature Sensor ABS-248-AA (At-the-Battery Sensor).............................................. 17, 21 - 24
Maintaining Multiple Batteries................................................................................................... 25
Battery Configurations .............................................................................................................. 26
Troubleshooting - Model 12248-AA-S1...................................................................................... 27
Detailed Specifications - VDC Model No. 12248-AA-S1......................................................... 29 - 33
Charging Profile.......................................................................................................................... 34
For Repair Or Replacement....................................................................................................... 35
Guarantee And Warranty............................................................................................................ 36
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
Underwriters Laboratories (UL)
REQUIRED SAFETY INSTRUCTIONS
WARNING
TO REDUCE THE RISK OF FIRE,
ELECTRIC SHOCK, OR INJURY TO
PERSON, OBSERVE THE FOLLOWING:
1. Do not expose charger to rain or snow. It is
designed to operate ONLY INDOORS.
2. USE of any attachment not specifically recommended by the battery charger manufacturer for
use with this exact model of charger may result
in risk of fire & electric shock or injury to person.
3. An extension cord should not be used, unless
absolutely necessary. Use of an improper extension cord could result in fire or electric shock. If
extension cord must be used be sure:
a. Pins on plug of extension cord are the same
number, size, & shape of plug on charger
b. Extension cord is properly wired and in good
condition.
c. Wire size is enough for AC ampere of charger
as specified below: Length of cord, feet (meters)
25 (7.6), 60 (15.2), 100 (30.5), 150 (45.6) AWG
Size #18.
4. Do not use charger if it received a sharp blow,
been dropped, or damaged.
5. Charger contains no serviceable parts. If it fails
for any reason, return to the address shown within
for a free replacement under warranty.
6. To reduce risk of electric shock, unplug charger
from outlet before attempting any cleaning.
7. WARNING - RISK OF EXPLOSIVE GASES.
WHENEVER YOU WORK NEAR A LEAD ACID
BATTERY IT IS DANGEROUS. BATTERIES
GENERATE EXPLOSIVE GASES DURING
NORMAL BATTERY OPERATION. FOR THIS
REASON, IT IS OF UTMOST IMPORTANCE
THAT EACH TIME BEFORE USING YOUR
CHARGER, YOU MUST READ THIS MANUAL
AND FOLLOW THE INSTRUCTIONS EXACTLY.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
To reduce risk of battery explosion, follow these
instructions and those published by the battery
manufacturer and the manufacturer of any equipment you plan to use in the vicinity of the battery.
Review cautionary markings on the products and
the engine.
8. PERSONAL PRECAUTIONS when working with
or near a lead acid battery.
a. Someone should be able to hear your voice or
close enough to aid you when working near a lead
acid battery.
b. Have fresh water and soap nearby case battery
acid contact skin, clothing, or eyes. Wear complete eye protection and clothing protection. Avoid
touching eyes while working near battery.
c. If battery acid does contact skin or clothing,
wash immediately with soap and water. If acid
entered the eye, immediately ood the eye with
running water for at least 10 minutes and get help
immediately.
d. NEVER smoke or allow a spark of ame near
battery or engine.
e. Be extra cautious to reduce risk of dropping a
metal tool or auto part onto battery. It might spark
or short circuit battery or other electrical part that
may cause an explosion.
f. 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
weld a ring or the like to metal, causing a severe
burn.
g. Charger is designed to be used for recharging
lead acid batteries ONLY. Never use it to power a
low voltage electrical system, or for attempting to
recharge dry cell batteries that are commonly used
in house holds. These batteries may explode and
cause injury to persons and damage property
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
Model 12248-AA-S1
NEVER CHARGE A FROZEN BATTERY OR
ONE AT A TEMPERATURE ABOVE 123° F.
PREPARING TO CHARGE
a. If necessary to remove battery from equipment
to charge. Always remove ground terminal rst.
Turn off all accessories in the vehicle, so as not to
cause an arc.
b. Be sure area around battery is well ventilated
while battery is being charged. Force gas vapors
away by using a piece of non-metallic material as
a fan.
c. Clean battery terminals. Be careful to keep corrosion from contacting eyes.
d. Add distilled water to each cell until battery
acid reaches level specied by the manufacturer.
This helps Purge excessive gas from cells. Do not
overll. For a battery without caps, follow manufacturer’s recharging instructions.
e. Study all battery manufacturer’s specic
instructions such as removing cell caps while
charging and recommended charge rates.
f. Determine condition of battery, by referring
to instructions herein, before ever attempting to
charge or desulphate any / all batteries.
CHARGER LOCATION
a. Make sure charger is as far away from battery
as output cables permit.
b. Never place charger directly above battery
being charged; gases from battery will corrode
and damage charger.
c. Never allow battery acid to drip on charger
when reading specic gravity or lling.
d. Do not operate charger in a closed-in area or
restrict ventilation in any way.
e. Do not set battery on top of charger.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
DC CONNECTION PRECAUTIONS
Note: Steps to be done in a well-ventilated area
away from aircraft.
a. Connect and disconnect DC output clips from
battery only after removing charger power cord
from outlet.
b. Attach clips to battery posts and twist or rock
back and forth several times to make good contact. This tends to keep clips from slipping off terminals and reduces risk of sparking.
c. Position DC output cord to reduce risk of
damage by hood, door, covers, or moving engine
parts.
d. Stay clear of fan blades, belts, pulleys, and
other parts that can cause injuries.
e. Check polarity of battery posts. POSITIVE
(POS, P,+) usually has a larger diameter than
NEGATIVE -.
f. Determine which post of battery is grounded
(connected) to the chassis of equipment. If nega-
tive post is grounded see Item N. If positive post
is grounded see item P.
N. For negative grounded equipment, connect
POSITIVE (RED) clip from charger to POSITIVE
(POS, P, +) ungrounded post of battery. Connect
NEGATIVE (BLACK) clip to vehicle chassis or
engine block away from battery. Do not connect
clip to carburetor, fuel lines, or metal body parts.
g. For positive ground equipment, con
-
nect NEGATIVE (BLACK) clip from charger to
NEGATIVE (NEG, N,) UNGROUNDED POST OF
BATTERY. Connect POSITIVE (RED) CLIP to
chassis or engine block away from battery.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
Do not connect clip to carburetor, fuel lines,
or sheet metal body parts. Connect to heavy
gauge metal part of frame or engine.
h. When disconnecting charger, disconnect charger from AC outlet, then remove clips from vehicle
chassis, and battery posts.
Operating instructions for charge information.
FOLLOW THESE STEPS WHEN BATTERY IS
OUTSIDE OF AIRCRAFT OR EQUIPMENT.
A SPARK NEAR THE BATTERY MAY CAUSE
BATTERY EXPLOSION. TO REDUCE RISK OF
A SPARK NEAR BATTERY:
a. Check polarity of battery posts. POSITIVE
(POS,P,+) usually has a large diameter than
NEGATIVE (NEG, N, -) battery post.
b. Connect (RED) charger clip to (POS+) post of
battery.
c. Position yourself and free end of cable as
far away from battery as possible, then connect
NEGATIVE (BLACK) charger clip to free end of
cable.
d. Do not face battery when making final con-
nections.
e. When disconnecting charger, always do so
in reverse sequence of connecting procedure
and break first connection while as far away from
battery as practical. Do not attempt to per-
manently install any charger not specifically
designed for permanent installation, especially in a wet / marine environment
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
Model 12248-AA-S1
QUALIFYING YOUR BATTERY:
Preliminary Requirements
NOTE: The BatteryMINDer has no electrical
output unless it is connected to a healthy
battery. Testing the BatteryMINDer with a volt
or an Amp meter without the unit being connected across a good battery will result in a false
reading. If you experience any problems, or are
not sure of how to properly use or connect your
BatteryMINDer, please e-mail our technical support at:
techsupport@vdcelectronics.com or call our tollfree technical support line 800-379-5579 x206
(Eastern Time). Be certain to leave your phone
number with the area code, time zone and
the best time to call.
To gain the best result from your new charger and
to maximize the life and performance of your batteries we strongly recommend you qualify (test)
your batteries before attempting to either chargemaintain or desulfate them. Remember, even if
you just purchased a “new” battery it may have
been subjected to conditions that have caused
“sulfation” such as high temperature (>=80°).
NOTE: If your battery is new and you are
certain it was not subject to conditions that
could have caused sulfation*, even before
you purchased it, then you can disregard our
recommendations for qualifying / testing your
battery, before using the BatteryMINDer.
* Such as high temperature storage (=/> 80°F)
and/or allowed to self-discharge to 12.4 Volts or
lower.
Testing a Filler Cap Lead Acid Battery
1. Carefully remove all filler caps from your battery.
2. Check the water-liquid electrolyte level. If
the level is low or has ever been below top of
plates, severe lead plate sulfation has taken place.
Significant recharge/reconditioning time is needed
to restore these plates to a condition where the
battery can be expected to function normally.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
3. Refill each cell with distilled water only to the
liquid level indicator found in each cell. Before
proceeding further you must be thoroughly
familiar with the safety and operating instructions.
4. Recharge the battery with the BatteryMINDer
to ensure that it is slowly and completely charged
before you determine its condition. Allow battery
to “rest”* overnight for a minimum of 12 hours
before testing with a temperature compensated
hydrometer and/or digital type voltmeter only.
* “RESTED” = a battery that has been as fully
charged as possible, using a 3 stage charger
(model 12248-AA-S1) and left disconnected
from charger or any type load for a minimum
of 12 hours.
5. If the BatteryMINDer battery condition LED
lights (YELLOW) within 72 hours (single battery)
or no balls float in one or more cells, your battery may be too far gone to be fully desulphated.
Reconnect battery to your BatteryMINDer and
press the Maintenance mode button. Allow battery
to remain in maintenance mode for a minimum of
72 hours, before re-test. Use a hot/cold calibrated
hydrometer tester for the most accurate results
(see Table 1) if you see an increase in the Specific
Gravity (SG) or voltage indicating that there is an
improvement in the battery’s condition, continue
desulphating for an additional 72 hours and retest
the battery. Continue this process until the SG or
voltage readings no longer increase.
Specific Gravity – Capacity
Temp. Compensated Hydrom-
eter - meter or 4 ball type
1.270 (4 Balls oating) 100%
1.250 (3 Balls oating) 75%
1.190 (2 Balls oating) 50%
1.150 (1 Balls oating) 25%
1.120 (0 Balls oating)
May denote shorted cell or
battery that has been severely
discharged and may not be
recoverable
TABLE 1
Full Capacity
Percentage
0%
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
Model 12248-AA-S1
Testing with a Hot/Cold Calibrated
Hydrometer Tester
Read the tester instructions carefully for most
accurate readings.
1. When using the tester the first time or after
a long period of non-use, fill the tester with the
battery fluid and let it sit for 1/2 hour or longer.
This will soak the balls in order to give you more
accurate readings. Failure to do so will give you
false readings indicating a battery that may not be
in as good a condition as you may have thought.
2. After inserting the tester in a cell, gently tap
the tester several times against the inside wall of
each cell to dislodge air bubbles that will cause
more balls to float than should. Failure to do so
will yield false readings that indicate a battery that
is not fully desulphated or does not qualify for
desulphation.
3. If no balls float in any cell, the cell is shorted. This means your battery is beyond the point
of being properly recharged or reconditioneddesulphated. Dispose of the battery.
If each cell floats three (3) or more balls (or 1250
on gauge-type), your battery can be desulphatedreconditioned.
4. Always rinse the tester with fresh water
after every use. Failure to do so will cause false
readings.
Testing a Sealed, AGM or Gelled-type Lead
Acid Battery
These batteries have no filler caps or manifoldtype covers. Because you cannot gain access to
the interior of your battery you cannot test it with a
hydrometer.
USE A DIGITAL VOLTMETER ONLY:
1. Recharge the battery with the
BatteryMINDer to ensure it is as completely
charged as possible, before you determine its
condition. Allow battery to “rest” (see pg. 9) overnight for a minimum of 12 hours before testing
with a digital voltmeter only.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
Failure to test a “rested” (see pg. 9) battery will
cause false readings. Be certain to read and
understand all safety related instructions (pages 3
to 7) before proceeding further.
2. Measure battery’s voltage, without any
load attached. If the voltage is less than 12.4
volts (Typically 50% of charge) the battery may be
too heavily sulphated to be fully recoverable. If
voltage is 12.4-V or higher full recovery can be
expected, given sufficient time (average 1-2 weeks
for batteries that are heavily sulphated).
3. Connect the BatteryMINDer to the battery.
Select type of battery.
4. Charge battery to its maximum level. Press
Maintenance-Float (select Battery type) button, if
it does not go into this mode automatically. Allow
battery to remain for a minimum of 72 hours
before retesting. If improvement is seen, continue
until battery voltage reaches full capacity level or
no further increase is seen.
Model 12248-AA-S1
OCV=Open Circuit No Load Voltage
OCV - “Rested”
Voltage
Full Capacity
Percentage
12.9 - 13.1 Volts 100%
12.6 - 12.9 Volts 75%
12.4 - 12.6 Volts 50%
12.2 - 12.4Volts 25%
12.0 - 12.2 Volts 0%
<11 Volts
= shorted
TABLE 2
Note: Do not expect to completely eliminate
sulphate in a few days. Long established sulphate will require several weeks or longer to
be fully dissolved. Be patient and you will be
rewarded with a “sulphate-free” battery.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
11
1
7
8
6
1) Battery clip cordset w/ qwik connect plug (pgs.13, 16)
2) Ring terminal cordset w/ qwik connect plug (pgs. 13, 16)
3) Mounting tabs
4) Input power cordset (pg. 13, 18)
5) Output cord w/ qwik connect plug (pg. 13, 16)
6) Temperature sensor input connector (pg. 17)
7) Charge rate selection button (pgs. 13, 17, 18)
5
3
2
10
9
4
12
8) Battery type selection button (pgs. 13, 17, 18)
9) Start / reset selection button (pgs. 13, 17, 18)
10) LED indicators for power, connection, fault, battery
condition, charge status (pgs.13-15, 18–20, 24)
11) 12 Volt Power cordset (Optional)
12) Temperature sensor with cord and ring terminal
(pg. 17, 21 - 24) (supplied on 12248-AA-S1)
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
Simplified Operating Instructions
(Read and thoroughly understand ALL SAFETY Instructions on pages (3-7) and Qualifying
Your Battery pages 8-11, BEFORE proceeding further.
1. Attach a battery connector assembly (supplied) to output cordset of charger, either the clips or ring
terminal assembly, - NEVER BOTH at same time.
2. Attach output to battery terminals-RED band = Positive + BLACK band = Negative.
2-a: Attach temperature sensor ABS-248 to battery and then to charger*.
3. Press 8A button twice (2x) until LED is lit.
4. Press Aviation button twice (2x) until LED is lit.
5. Plug AC power cord into 120 Vac electrical outlet. Observe REVERSED Polarity LED indicator. If lit
RED, reverse battery connector attachments on battery.
6. Observe Battery Connected - Error Indicator, LED Must be lit GREEN.**
7. Observe GREEN LED indicator labeled Charge-Float = Solid when charging, Blinking when maintaining battery(s). Charger will automatically start.
IF IN DOUBT REGARDING ANY OF THE ABOVE, REFER TO FULL INSTRUCTIONS
* See detailed instructions for need and method of properly connecting sensor to battery, pgs. 21 - 24.
** See full instructions if not lit GREEN.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
Battery connected before charge:Vb<11V YELLOW
Vb>11V GREEN
If pressing Reset Button in the charging stage STOPS CHARGING AND ALLOWS RESET OF ALL SELECTIONS
Battery sulphation checked: Vb<11V (BEFORE CHARGE) YELLOW
Vb>11V GREEN
Battery sulphation checked: Vb<13V (AFTER CHARGE) YELLOW
Vb>13V GREEN
®
LED INDICATOR FUNCTIONS -- Tables 3 (top) and 4 A&B (bottom)
Battery Condition Indication
LED Status - (Power / Error and Charge LEDs) POWER / ERROR CHARGE - FLOAT
GREEN RED GREEN
A.C. power disconnected, battery connected correctly OFF OFF
A.C. power connected, battery connected GREEN OFF
A.C. power connected, battery connected (press start button) GREEN ON
At Soft Start mode, Bulk charge mode, Absorption mode GREEN ON
In Sulphate check mode Float charge mode GREEN FLASH
A.C. power connected Reversed Battery Polarity RED ON OFF
A.C. power connected, charger output Clip shorted RED ON OFF
A.C. power connected, battery voltage is less than 3V RED ON OFF
Timed-out when in SoftStart or Bulk mode RED FLASH OFF
Timed-out when in Absorption mode & Forced to Float mode RED FLASH FLASH
Battery Fault / Battery Weak RED FLASH OFF
Model 12248-AA-S1
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 14
BatteryMINDer
9LL=JQ'#(=J
¸
Charger / Maintainer /
Full Time De-Sulfator - Conditioner
Model 12248-AA-S1 12-Volt @ 8 Amp
8 A
Until
8A Lit
Until
Aviation Lit
Charge - Float
Green (solid) = Charging
Green (blinking) = Float (maintenance)
*See Instruction Manual
PRESSPRESSPRESS
MAINTENANCE
MODE ONLY
(HOLD 3 SEC.)
Start / Reset
/ Stop
U.S. Patents: 5783929 & 6078166
VDC Electronics, Inc.
800-379-5579 (ET)
www.vdcelectronics.com
AVIATION
AVIATION-CALIBRATED
AIRCRAFT BATTERY ONLY
FOR LEAD-ACID
GA BATTERY ONLY
Green = Power ON
ERROR:
Red = Polarity Reversed
/ Battery = less than 3-Volts*
Red (Blinking) = Battery not fully charged charger in float-maintenance mode
*
Battery Condition Indication
Power On & Battery Connected
Before Start Charge:
Green = OK - Accepted
Yellow = Weak / Sulfated / Deep Discharge*
After Charge:
Green = Good
Yellow = Sulfated / Weak*
Hold for 5 sec. for full reset
®
Model 12248-AA-S1
LED INDICATOR FUNCTIONS
LED indicators refer to charger label at right
GREEN
8A
ON
TABLE 5
RED
AVIATION
TABLE 6
Rev. F-103007 P/N VDC12248AA-S1-MNL
ON
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BatteryMINDer
®
Model 12248-AA-S1
Detailed Operation Instructions
Model 12248-AA-S1
After carefully reading and understanding the
Safety Instructions contained in this manual
(pages 3 to 7) and having evaluated your battery
as described in Qualifying Your Battery (pages 8 to
11) you are properly prepared to begin using your
charger.
1. Attach output cord of charger to either the
Battery Clip(s) Assembly (BCA) (supplied) or the
Ring Terminal Assembly (RTA) (supplied) depending on your preference. However never use both
assemblies at the same time for any reason whatsoever.
Never use either of these assemblies on any
other charger or for any other purpose such
as improvised “jumper cables”, etc.
Using the RTA on batteries remaining in their normal use location (in same place they are regularly
installed will normally prove the safest and most
convenient. If you have several applications you
may wish to purchase additional Ring Terminal
Assemblies (RTA) available from your dealer or
VDC Electronics, Inc. directly.
Note: this assembly contains a 15 Amp automotive type fuse and is replaceable should
for any reason it were to blow. Never replace
this fuse with any type whose rating is higher
than 15 Amps, as seriously harmful results
may occur.
2. Identify the positive and negative posts or
connections on your battery, usually clearly designated with the polarity markings of + (positive)
and – (negative). If you have previously installed
the RTA referred to in 1. above, you need only to
press the connector plug of the charger’s output
cord into the mating plug of the RTA. Push firmly
and do not leave any space between them.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
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Model 12248-AA-S1
Correct polarity and a good connection will be
your reward. Attach the BCA to the proper bat-
tery posts, clamps or screw terminals, depending
on type of battery.
ALWAYS
connect the negative
(BLACK) clip to a metal grounding point (Negative
ground installations such as most modern cars,
trucks, boats, RVs, etc.) as far away from battery
as possible for maximum safety. Never connect to
any type of fuel line.
Note: Older vehicles or other devices may be
Positive ground installations
requiring differ-
ent connection recommendations. If unfamiliar or
unsure which battery type of grounding system
you have, check with our Tech Support personnel
before proceeding further.
Note: Temperature Compensation Sensor
Assembly (Part# ABS-248). See pages 21 - 24
3. Press 8A Button twice (2x) until LED lit.
4. Press “Until Aviation Lit” button until LED lights.
5. Plug the unit’s Power cord into a standard
– grounded 120 Vac electrical outlet. The Battery
Connected LED Indicator will light GREEN. If it
does not light GREEN check the outlet to be
sure it is functioning. In addition, be sure if outlet
is controlled by a switch, no one will accidentally
shut off the power to the outlet. Check for cor-
rect polarity = (no ERROR RED LED Indicator). If
ERROR Indicator is lit, reverse the charger’s out-
put connections to the battery.
for full detailed instructions.
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
6. Press the Start / Reset /Stop button. The
Charge – Float LED Indicator will light GREEN.
The charger will now begin charging by first
checking the battery to determine its voltage and
ability to accept a charge. Should the battery not
have a normal fully discharged voltage (10.5-V
minimum) the unit will begin charging in the “SoftStart” mode to determine if the battery can be
safely charged. If it cannot, the Battery Connected
– Error LED will flash RED and charging will be
stopped. Battery should be carefully checked
under a load by a qualified person before further
attempting to charge it.
Model 12248-AA-S1
Rev. F-103007 P/N VDC12248AA-S1-MNL
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BatteryMINDer
®
Note: If the battery does not have a mini-
Model 12248-AA-S1
Volts (YELLOW)) or greater than 11-Volts (GREEN)
mum no load OCV (Open Circuit Voltage)
of 3 volts, the ERROR LED will light
RED and charger will reject battery.
No further effort should be made to charge this bat-
tery with this charger or any charger. Discard this
battery, unless it has just been subjected to a long
period of continuous discharge under a load such
as can occur with leaving lights on or cranking an
engine excessively. Allow such a battery to “Rest”
for several hours (overnight if possible) before
determining if it is defective. Be very suspicious of
any 12-V battery that does not have at least 11-
Volts (OCV) before it is recharged. It may well be
seriously damaged and unsafe for any type of use
or recharge. The unit’s Battery Condition Indication
7. After battery has been fully charged, the GREEN
Charge-Float LED Indicator will begin blinking. It will
continue to blink indefinitely, unless unit is discon-
nected from battery or Start / Reset button is pressed.
Should battery be unable to be fully charged, the
LED will not blink and the RED Error LED will blink.
Battery may not be able to be fully charged, may
be too large or too deeply discharged to be fully
charged in the normal time allowed by charger. If
you are certain battery is not defective, having read
and understood completely all of the above con-
cerns and conditions, proceed to restart the char-
ger by pressing and holding the Start/Reset/Stop
button for approx. 5 seconds until all LEDs Flash.
This allows charger to begin charging battery again.
LED will help you determine if battery is less than 11-
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 19
BatteryMINDer
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Model 12248-AA-S1
If battery is not defective it should be able to be
fully charged after being restarted. After sufficient
time has lapsed the GREEN charge LED Indicator
will blink confirming when / if battery is now fully
charged.
Note: If attempting to charge more than one
battery at a time it is very likely the charger will need to be restarted as described in
order to completely charge multiple batteries. We do not recommend charging more
than one battery at a time without confirming the individual condition of each battery
and monitoring the charging and batteries
closely. A better solution is to charge each
battery separately using your model 12248AA-S1 BatteryMINDer and then connect them
together, if desired for long term maintenance-float charging. We suggest your reading the detailed specifications on pages (21
- 26), including the additional LED indicator
functions (pgs. (14-15) not already covered
above.
After carefully reading these instructions and
Troubleshooting (pgs. 27 - 28) sections, should
you still have questions, please e-mail our technical support department at:
techsupport@vdcelectronics.com.
Allow up to 3 business days for a detailed
response to your questions. Always identify the
model number of the product and revision letter of
this manual contained on this page below. Without
this information we may not be able to assist you
correctly.
If your questions have already been answered in
this manual you can expect a response referring
you back to this manual and the specific page(s).
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 20
BatteryMINDer
®
Model 12248-AA-S1
INSTRUCTIONS:
TEMPERATURE SENSOR Type: ABS-248
(At-the-Battery Sensor)
MANDATORY WHEN CHARGER IS USED WITH
Sealed or Maintenance-type Aviation batteries,
regardless of construction (Gel, AGM, FreeElectrolyte = filler caps)
Congratulations on purchasing the most advanced
charger-maintainer-desulfator conditioner on the
market today. Read you manual carefully to understand all of its features. Your charger came with the
At-the-Battery Sensor ABS-248. Please read and
fully understand all of the following before beginning
your installation.
Your temperature sensing system is made up of
two components. The thermal sensor w/ ring terminal and male plug w/ dust cover both shown
below with extension cord attached. This cord then
attaches directly to the mating female receptacle
located on the charger
Do NOT modify by extending or shortening the
extension cord.
Attaching the temperature sensor with extension
cord.
Your rst choice should be to connect it to the
Positive (+) or Negative (-) post (clamp / screw) of
the battery. This is the best location to sense the
temperature of the battery.
The second choice is to place it as close to the
battery as possible. Attachment of the sensor to
the side or top of battery is also a possible option,
under the right circumstances. Be careful to ensure
it will not come loose in service.
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 21
BatteryMINDer
®
Model 12248-AA-S1
Finally, if placing the sensor on the battery in not practical, place it where the ambient temperature the
battery is exposed to (surrounded by) can be sensed. Installed properly, your charger is set to provide
your battery with what it needs to out-live and out-perform any similar battery used in the same application-conditions by a factor of two (2).
Temperature has a direct effect on the life of a battery. The design life of the battery is based on an aver-
age annual temperature of 25°C (77°F). As the temperature increases above 25°C (77°F), the life of the
battery decreases. The chart below shows the effects of temperature.
Effects of Temperature on Battery Life*
Maximum Annual Average
Battery Temperature
25°C (77°F) 50°C (122°F) 0%
30°C (86°F) 50°C (122°F) 30%
35°C (95°F) 50°C (122°F) 50%
40°C (104°F) 50°C (122°F) 66%
45°C (113°F) 50°C (122°F) 75%
50°C (122°F) 50°C (122°F) 83%
25°C (77°F) 50°C (122°F) 0%
For example: If a battery’s design life is 10 years at 25°C (77°F), but the average battery temperature is 35°C (95°F), the life of
the battery will be only 5 years a 50% decrease.
*GNB Industrial Power, A Division of Exide Technologies, Section 92.30 Part No. Z99-Mar/Sep I&O REV 10/01
Maximum Battery
Temperature
Percent Reduction in
Battery Life
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 22
BatteryMINDer
AGM Charge and Float Voltages at Various Temperature Ranges**
Temp °F
Optimum Charge
Optimum Float
Temp °C
≥120
13.40
12.45
≥49
110 – 120
13.60
12.55
43 – 49
100 -110
13.70
12.65
38 – 43
90 – 100
13.80
12.75
32 – 38
80 – 90
13.90
12.85
27 – 32
70 – 80
14.10**
13.05**
21 – 27
60 – 70
14.25
13.30
16 - 21
50 – 60
14.40
13.50
10 - 16
40 – 50
14.60
13.70
4 - 10
≤40
14.90
13.90
≤4
Note: This chart shows the Charge and Float voltage ranges v. temperature for sealed 12-Volt AGM Aviation
type batteries. Values will differ for sealed Gel or Flooded (ller cap) or maintenance-free types.
®
Model 12248-AA-S1
The chart below shows the need to regulate the output voltage of the charger to ensure against over or
under charging your battery over a wide range of temperatures. Using your At-the-Battery Sensor will
accomplish this better than any other known method.
** Values shown in RED are based on information supplied by Concorde Battery Co., effective 12-27-06. Values for sealed AGM
types manufactured by other aviation battery companies are believed to be comparable. We strongly recommend checking with
the appropriate dealer or battery manufacturer to be certain.
battery found to be damaged by any of our Aviation Adjusted (-AA) chargers, as we cannot confirm whether or not the
user correctly selected the required battery type or used and correctly installed the Temperature Sensor type ABS-248.
VDC, nor its resellers, will be responsible for any aviation type
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 23
BatteryMINDer
Notes:
®
Model 12248-AA-S1
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 24
BatteryMINDer
®
Model 12248-AA-S1
MAINTAINING MULTIPLE BATTERIES
BatteryMINDer 12248-AA-S1 maintenance char-
ger Desulphators can be used to maintain up to
six (6) 12-volt batteries at a time, providing each
battery is fully operational (no dead-dying cells),
free of sulphate and meeting the minimum full
charge “rested” (see pg. 9) voltage of 2.13 volts
/ cell, after being fully desulphated. Press the
Maintenance Mode Only button immediately and
hold it for 3 seconds to ensure BatteryMINDer is
in the proper mode for maintenance charging-
desulphating, immediately after making proper
connection to the batteries. ALL batteries MUST
be properly tested to ensure they are in good
condition (no dead-dying cells or excessive
sulphation) before maintaining them in mul-
tiples. Only healthy, fully desulphated batteries
Test each cell of All filler cap batteries using an
accurate, temperature compensated hydrometer.
Test sealed (no filler caps) batteries using an accu-
rate, DIGITAL type ONLY, voltmeter. The Minimum
voltage Must not be less than 2.13 volts / cell after
fully charging battery and letting it “rest” for 12
hours minimum, before testing. If battery voltage
is less than 2.13 / cell you must first desulphate
it until you reach a “rested” (see pg. 9) voltage of
2.13 volts / cell.
Remember, you must desulphate each battery by
itself (one at a time) before maintaining them for
extended periods. Attempting to desulphate more
than one (1) battery at a time will yield very poor
results, as the strongest (healthiest) and not the
weakest (most sulphated) battery will receive the
majority of the desulphation pulse energy.
should ever be MAINTAINED in sets of 2 or more.
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 25
BatteryMINDer
®
Model 12248-AA-S1
ALWAYS test each individual battery to be certain
it is healthy and free of sulphate before attempting
to charge or maintain them, either as a single battery or in sets. NEVER connect multiple batter-
ies together for charging purposes using less
than #18 Gauge insulated wire.
VDC Electronics, Inc. does not make nor can it
supply or recommend, any type of wire harness
to connect individual batteries for the purpose of
charging them in groups, due to the many battery
terminal sizes and configurations that exist.
See diagram (adjacent) for the most common multiple battery configuration.
12248-AA-S1
Battery Configuration
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 26
BatteryMINDer
®
Model 12248-AA-S1
Troubleshooting - Model 12248-AA-S1
We use the word “Indicator” to mean the
various LEDs (Light Emitting Diodes) showing
the various faults, modes, and conditions of
the battery and / or charger.
The words “unit”, “charger” or “recharger”
means your model 12248-AA-S1 BatteryMINDer
Problem:
Power ON indicator does not light
Solution:
Check electrical outlet. If controlled by a wall
switch be sure switch is on and try to prevent
accidental shutting it off while charger is working.
Problem:
ERROR indicator lights RED
(several possibilities can be the cause)
Solution:
1. Output leads - connections to battery may be
reversed. Switch (reverse) connections at battery
2. If still remains RED check battery voltage. If 3Volts or less battery may be damaged and should
not be recharged. If battery was just recently
removed from a load (lights, electronic equipment)
or not used for extended time without a charger-
maintainer, allow battery to “recover” by letting it
“rest” without a load. If battery is healthy and just
deeply discharged it should recover its voltage
(rise above 3 volts) sufficiently to allow charger to
begin an attempt to fully recharge it. If after bat-
tery has “rested” (see pg. 9) it may not be able to
be recovered – recharged. It should be safely discarded – recycled.
Problem:
ERROR Indicator lights RED and is blinking.
Solution:
1. Battery(s) may be weak, heavily sulfated, or too
large to fully charge before unit times out. Allow battery to remain in Maintenance-Float mode for 72
hours or more and then attempt to recharge again.
2. Battery may be so large it may require a second
full recharge. Repeat recharge by pressing and holding START/RESET/STOP for 5 sec. until ALL LEDs
light. Reset charge rate and battery type, if needed.
Press START button to begin full recharge.
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 27
BatteryMINDer
®
Model 12248-AA-S1
3. If recharging multiple batteries, 2 or more
complete recharge cycles may be needed.
Repeat full recharge by pressing START button again. If still RED-blinking, you may need to
charge each battery separately.
Problem:
Battery Condition Indicator lights YELLOW
(After battery has been completely charged)
Solution:
Battery still has an unacceptable level of sulphation and must stay connected to charger and
remain in Maintenance-Float mode (GREEN blinking indicator) for 72 hours or longer. Then stop
charger by pressing START / RESET button and
observe Indicator. If still YELLOW repeat (up to 3
full cycles) or until indicator lights GREEN.
Problem:
Battery Condition Indicator lights YELLOW (May
be several causes)
(Before battery is completely charged)
Solution.
Battery can be weak due to sulphation, self discharge or was very deeply discharged.
Attempt a full recharge and recheck after comple-
tion. If still YELLOW follow procedure for (After
battery has been completely charged.)
Problem:
Error and Charge LEDs blink simultaneously
Solution:
Charger has timed out before battery has completely charged. Reset unit. Repeat reset - full
recharge by pressing RESET button and holding
it down until ALL LEDs flash. Reset charge rate
and battery type, if needed. Press START button
to begin full recharge.
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 28
BatteryMINDer
®
Model 12248-AA-S1
DETAILED SPECIFICATIONS - VDC Model No. 12248-AA-S1
14.1V --- 8A MCU controlled H.F. Battery Charger
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
Electrical Parameters
Input Voltage: 90-140 Vac
Input Frequency: 50/60 Hz
Unloaded input current: 80 mA ac
Input Current consumption at 120Vac input, output 13V 8A loading (UL1236) Approx: 1A ac
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 29
BatteryMINDer
®
Model 12248-AA-S1
DETAILED SPECIFICATIONS - VDC Model No. 12248-AA-S1 (con’t.)
• Charging Output Control Characteristics
• Charging Flow : Battery condition detect>Soft Start Charge>Bulk Charge>Absorption
Charge>Sulfate Check>Float Charge
• Soft Start Charging Activity conditions: Battery Voltage is over 3 Vdc and less than 10.5Vdc
• Soft Start Charging output current control: (8A mode) 4 ±0.25 Adc
• Soft Start Charging Time Limited: (Stop charge If battery cannot be charged over 10.5V after
6 hrs, Error LED flash indicated) 6 ±0.25 Hours
• Bulk Charging Activity conditions: Battery Voltage is over 10.5Vdc
• Bulk Charging Current control at 8A mode: (Selected by pressing “Until 8A Lit” Button)
• Max. rated output voltage and current: 13.0V at 8Adc 13.6V at 6.50Adc
• Bulk Charging Time Limited: (Stops charge If battery cannot be charged reach 14.1
after 20 hrs, error LED flash indicated) 20 ±1 Hours
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 30
BatteryMINDer
®
Model 12248-AA-S1
DETAILED SPECIFICATIONS - VDC Model No. 12248-AA-S1 (con’t.)
Absorption mode transitions to Float mode conditions in AGM setting:
Mode: 1) Charging current
2) 5 Hours Time-out: after 5 Hours unit switches to Float Charge Mode
Absorption mode Thermal Runaway Protection: Stops Charging when the second current sample is
larger the first current sample (Positive dI/dt)
Switch to Float mode in Bulk charge or Absorption mode when Battery type Button is Pressed For
3 Seconds or longer. GREEN Charge - Float LED will blink
Float Charge output Voltage control 13.1 ±0.25 Vdc
Float Charge current control (8A Rate) 4 Adc±0.25
Float charge transitions to PWM* Float Charge Mode after 1 Hour
Float Pulse Charge voltage control 13.1@24°V ±0.25 Vdc
Float Pulse Charge current control: (8A Rate) 4 Adc ±0.25
*Pulse Width Modulated
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 31
BatteryMINDer
®
Model 12248-AA-S1
DETAILED SPECIFICATIONS - VDC Model No. 12248-AA-S1 (con’t.)
Battery sulphation check period (After absorption charge is finished): 10 minutes
Unloaded output voltage when battery is disconnected: 0.5 Vdc (max.)
Output short-circuit current when battery disconnected: 5mA dc (max.)
Battery flow back current (to the charger) when connected to 12V battery, AC Power disconnected:
30 (max.) mA dc
All LED indicators will shut off if AC power is disconnected for 5 Minutes
Full time Desulphation output pulse current control Ip-p ±3 Adc
Full time Desulphation output PWM* frequency 100 ±10Hz
Full time Desulphtation duty 0.3%
*Pulse Width Modulated
Temperature Compensation (with ABS-248 Battery Temperature Sensor)
detailed on pages 21 -24.
LED Indicator functions
Tables 5 & 6
GREEN
8A
ON
TABLE 5
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 32
RED
AVIATION
ON
TABLE 6
BatteryMINDer
®
Model 12248-AA-S1
DETAILED SPECIFICATIONS - VDC Model No. 12248-AA-S1 (con’t.)
Transformer
Transformer Type: Ferrite core transformer
Rising Temperature of Transformer: 80ºC Max.
Insulation
Primary to Secondary insulation Test: 1240 Vac 60Hz with 1 minutes, 10mA ac no break down found
Primary to core insulation test: 1240 Vac 60Hz with 1 minutes, 10mA ac no break down found
Secondary to core insulation test: 500 Vac 60Hz with 1 minutes, 10mA ac no break down found
Electrical Cable
Input Lead and plug specifications :CUL SJT 18AWG X2 with UL 2-pin plug, External Length 6 ft
Output lead : 1015 105°C VW-1 16AWG with Trailer connector, External Length 6 ft
Extension cord: 1)1015 105°C VW-1 16AWG with Trailer connector & battery clamp, External Length 6 ft
2)1015 105
°C VW-1 16AWG with Ring terminal & blade type Fuse, External Length 6 ft
Thermal Sensor Extension Cord: 11’8”
Ring terminal I.D. dimensions Negative 8mm, Positive 10mm
Physical Parameters
Weight: 2.2 lbs.
Plastic enclosure material: UL-94V0 #1 Noryl or #2 PC+ABS #3 PC
Enclosure Dimension: Approx. 5.713 (W) x 5.516 (L) x 2.86 (H) inches
Environmental Characteristics
Operating temperature : -10° to 40°C
Storage temperature : -10° to 80°C
Operating Humidity range: 0 to 95% RH
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 33
BatteryMINDer
3-Volt
start
10.5-Volt
Soft Start
(2A)
(6 Hours
time-out
limited)
Bulk Charge
(8A [20 Hours]
timer limited)
Aviation Mode: 14.1-Volt @ 24ºC
(with Temperature compensation)
Absorption Charge
(5 hours-timer Limited)
Sulphate
Check
(10 min.)
Float Charge
Full Time Desulphator
Full Time Desulphator
Time
Current
Voltage
14.1-Volt
Charging Current
Battery Voltage
13.05-V@ 24ºC
®
Model 12248-AA-S1
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 34
BatteryMINDer
®
Model 12248-AA-S1
FOR REPAIR OR REPLACEMENT
In the event that you believe your product may be
defective, you MUST speak to a VDC Electronics technician at 1-800-379-5579 x206 (ET) before proceeding
further.
If after speaking with our tech support personnel it is
necessary to return the unit, you MUST request an
RMA number.
All returns must be authorized by VDC Electronics.
Items must be returned within 10 days after receiving
your Return Merchandise Authorization number
and must be packed in the original packaging with
manual and all connectors included.
Your Return Merchandise Authorization number must
be shown on the return shipping label as follows:
VDC Electronics, Inc.
Returns Department
Attn.: RMA # (Enter Your RMA# Here)
147 D Woodbury Rd.
Huntington, NY 11743
Note: If your questions relate to safety concerns, please contact:
customersupport@vdcelectronics.com or if a
potentially hazardous emergency may exist
cease using the product immediately and call
(800) 379-5579 ext. 202 (ET) Monday – Friday
or contact our tech support at ext. 206.
Standard operating questions, clearly
answered in this manual, will not be
answered by phone.
YOUR NOTES:
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 35
BatteryMINDer
VDC Electronics technician at 1-800-379-5579 x206 ET. Please see Page 35 for details.
®
Model 12248-AA-S1
Guarantee and Warranty
NOTE: ALL returns must be authorized by VDC Electronics after speaking to a
Rev. F-103007 P/N VDC12248AA-S1-MNL
Page 36
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