OWNER’S MANUAL
Model: BT-100
Battery Load Tester
For 6 & 12 Volt Lead-Acid Batteries
ELECTRIC CORPORATION
MT. PROSPECT, IL 60056
Send Warranty Product
Repairs To:
CustomerReturns
P.O. Box 280
1025E.ThompsonAvenue
Hoopeston,IL 60942-0280
Questions? Call Customer Service
1-800-621-5485
00-99-000437/0804
BASIC BATTERY LOAD TEST
(Conventional & Maintenance-Free Types)
1. Connect clamps to battery posts Red (+) Pos, Black
(-) Neg and note the battery’s capacity. Engine and all
electrical accessories must be off when testing battery.
2. Hold load switch “on” for 10 seconds.
3. Read meter with load still on then refer to battery
analysis table on back of Tester.
COLD TEMPERATURE EFFECTS
A battery will test lower when cold than when warm. For
more accurate results, please reduce the battery’s nominal
rating by 200 cranking amperes (one step on meter scale)
for each 20°F drop below 40°F. If cranking ampere rating is
800 and battery temperature is 0°F, test as a 400 cranking
ampere battery (i.e. 2 steps down).
TEMPERATURE COMPENSATION
BATTERY
+20°F
0°F
-20°
TEMPERATURE
DECREASE BAT.
RATING BY:
1 STEP
2 STEP
3 STEP
1 STEP = 200 Cranking Amps.
1
BATTERYANALYSIS
(Meter ReadingAfter 10 Seconds with Load Switch On)
LOAD TEST
BATTERY CONDITION
Good (Green)
Battery capacity is OK. Battery may or
may not be fully charged. Check spe-
cific gravity of battery to determine state
of charge, check for electrical drain or
possible charging system trouble. Re-
charge battery to full level.
Battery capacity is not satisfactory. Bat-
tery may be either defective or not fully
charged. Check specific gravity to de-
termine which condition exists. If charg-
ing does not bring specific gravity to full
charge level, battery should be replaced.
Weak or Bad,
But Needle
Remains Steady
(Yellow or Red)
Weak or Bad,
But Needle
Battery may be defective or very run
down. Release load switch and note volt
Remains Failing meter reaction. Voltage recovery to 12
(Yellow or Red)
volt or above within seconds indicates
defective battery. Slow voltage recovery
indicates run down condition. For best
results, check specific gravity.
2
STARTER MOTOR TEST
1. Connect clamps to battery posts and do the basic
battery test. In addition, note the exact voltage with the
load test on. If voltage continues to fall after 10 seconds,
this test cannot be preformed.
2. Apply the voltage obtained above to starter test table
on the scale plate. In this case, please use the next
higher minimum cranking volts for the engine of less
than 200 CID. For example, if load voltage is 11.00,
use 10.2 for minimum cranking voltage.
LOAD
10.2 10.4 10.6 10.8 11.0 11.2 11.4
VOLTS
MIM CRANK 7.7
8.2
8.7
9.2
9.7 10.2 10.6
VOLTS
STARTER
TEST
3. Disable the ignition system without starting, crank the
engine and note the voltage.
4. If cranking voltage of Step 3 is below the minimum
cranking voltage in starter test table, the starter current
draw is excessive. If starter cranks slowly, check for
high resistance or poor connections.
3
CHARGING SYSTEM TEST
1. Connect clamps to battery for basic load test.
2. Operate engine at fast idle.
3. Note meter reading with all electrical accessories off.
It should be in green “good” band in “charging system”
scale.
4. With headlights and blower motor on high, meter
should remain in green “good” band.
5. If meter reads red band or outside the charging system
zone, trouble is indicated.
NOTE
On initial use of your Battery Tester, smoke may
develop. This is caused by the lubrication burning off
the heater coils. This will not affect the performance of
your Battery Tester and will diminish upon further use.
4
LIMITED WARRANTY
SCHUMACHER ELECTRIC CORPORATION, 801 BUSINESS CEN-
TER DRIVE, MOUNT PROSPECT, ILLINOIS 60056-2179 MAKES
THIS LIMITED WARRANTY TO THE ORIGINAL PURCHASER AT
RETAIL OF THIS PRODUCT. THIS LIMITED WARRANTY IS NOT
TRANSFERABLE.
Schumacher Electric Corporation warrants this battery tester for six
months from date of purchase at retail against defective material or
workmanship. If such should occur, the unit will be repaired or re-
placed at the option of the manufacturer. It is the obligation of the
purchaser to forward the unit together with proof of purchase, trans-
portation and/or mailing charges prepaid to the manufacturer or its
authorized representative.
This limited warranty is void if the product is misused, subjected to
careless handling, or repaired by anyone other than the manufac-
turer or its authorized representative.
The manufacturer makes no warranty other than this limited war-
ranty and expressly excludes any implied warranty including any war-
ranty for consequential damages.
THIS IS THE ONLY EXPRESS LIMITED WARRANTY AND THE
MANUFACTURER NEITHER ASSUMES NOR AUTHORIZES ANY-
ONE TOASSUME OR MAKEANY OTHER OBLIGATION TOWARDS
THE PRODUCT OTHER THAN THIS EXPRESS LIMITED WAR-
RANTY. THE MANUFACTURER MAKES NO WARRANTY OF MER-
CHANTABILITY OR FITNESS FOR PURPOSE OF THIS PRODUCT
AND EXPRESSLY EXCLUDES SUCH FROM THIS LIMITED WAR-
RANTY.
SOME STATES DO NOTALLOW THE EXCLUSION OR LIMITATION
OF INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LENGTH OF
IMPLIED WARRANTY SO THE ABOVE LIMITATIONS OR EXCLU-
SIONS MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTSAND YOU
MAYALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO
STATE.
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