MODEL:

PST-200
100 Amp
Digital Battery Load Tester/
Charging System Analyzer
for 12 Volt Batteries
OWNERS MANUAL

READ THE ENTIRE MANUAL BEFORE USING THIS PRODUCT.

FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY.

0099000438-02
1. IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS – • This tester is not intended for use by
This manual will show you how to use children.
your tester safely and effectively. • Do not expose the tester to rain or snow.
Please read, understand and follow these
instructions and precautions carefully, as • Do not operate the tester if it has
this manual contains important safety and received a sharp blow, been dropped or
operating instructions. otherwise damaged in any way; take it
to a qualified service person.
WARNING:
RISK OF EXPLOSIVE GASES. • Inspect the battery for a cracked or
broken case or cover. If the battery is
WORKING IN THE VICINITY OF A
damaged, do not use the tester.
LEAD-ACID BATTERY IS DANGEROUS.
BATTERIES GENERATE EXPLOSIVE • Do not disassemble the tester; take
GASES DURING NORMAL OPERATION. it to a qualified service person when
FOR THIS REASON, IT IS IMPORTANT service or repair is required. Incorrect
THAT YOU FOLLOW THESE reassembly may result in a risk of fire or
INSTRUCTIONS EACH TIME YOU USE electric shock.
THE TESTER. • Follow these instructions and those
• Read the entire manual before using this published by the battery manufacturer
product. Failure to do so could result in and the manufacturer of any equipment
serious injury. you intend to use in the vicinity of the
battery. Review the cautionary markings
• Use the tester in a well-ventilated area.
on these products and on the engine.

2. PERSONAL SAFETY PRECAUTIONS

• Wear complete eye and clothing • Remove all personal metal items from
protection when working near lead-acid your body, such as rings, bracelets,
batteries. Always have someone nearby necklaces and watches. A lead-acid
for help. battery can produce a short circuit
• Have plenty of fresh water, soap and current high enough to weld a ring to
baking soda nearby for use, in case metal, causing a severe burn.
battery acid contacts your eyes, skin or • Never smoke or allow a spark or flame
clothing. Wash immediately with soap in the vicinity of the battery or engine.
and water and seek medical attention. • Be extra cautious, to reduce risk of
• If battery acid comes into contact with dropping a metal tool onto battery. It might
eyes, flush eyes immediately for at least spark or short-circuit battery or other
10 minutes and get medical attention. electrical part that may cause explosion.
• Neutralize any acid spills thoroughly with
baking soda before attempting to clean up.

3. PREPARING TO TEST
• Be sure area around battery is well battery manufacturer. This helps purge
ventilated while battery is being tested. excessive gas from cells. Do not overfill.
• Clean battery terminals. Be careful to • If necessary to remove battery from
keep corrosion from coming in contact vehicle for testing, always remove
with eyes. grounded terminal from battery first.
• If the battery is not sealed, maintenance- Make sure all accessories in the vehicle
free, add distilled water in each cell until are off, so as not to cause an arc.
battery acid reaches level specified by

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4. OPERATING INSTRUCTIONS
IMPORTANT: For testing 12 volt batteries measures less than 75%, it should be
only. Suggested operational range charged and load tested again. Replace
32°F (0°C) to 122°F (50°C) ambient air the battery if it fails again.
temperature. The values in the following chart are for a
12 VOLT BATTERY ANALYSIS 12 volt battery.
Press “START TEST” and wait for 10 OPEN CIRCUIT VOLTS PERCENT OF CHARGE
seconds. Once automatic test cycle is 11.7 volts or lower 0
completed, your test results will be: 12.0 25
1. GREEN LIGHT = OK 12.2 50
Battery capacity is good. May or may
not be fully charged. Determine state 12.4 75
of charge by checking specific gravity 12.6 or higher 100
(use hydrometer). If gravity is less
than full charge, check for possible TESTING THE CHARGING SYSTEM
charging system trouble or electrical (After Battery Load test)
drain. Recharge battery to fully 1. With the tester still connected to the
charged level. battery, press “START TEST” to toggle
2. GREEN + YELLOW LIGHTS = the “TEST STATE” lights from “LOAD”
OK BUT WEAK to “CHARGING”.
Review the load test result with the 2. Start the engine and allow it to reach
comparison chart on the tester cover normal operating temperature.
to see if this battery is “OK” or not. If it 3. Run engine at 1200 to 1500rpm.
is “OK”, go up to 1ST “OK” state. If it is CAUTION: Stay clear of moving
not, go down to 3rd “WEAK” state. engine parts.
3. YELLOW LIGHT = WEAK 4. Read the results. Illumination of
Battery capacity is unsatisfactory. the RED-“BAD” light indicates a
Battery may be either: (1) defective or problem in the charging system that
(2) partially discharged. To determine will undercharge a battery (less than
which, check specific gravity. If gravity 13.6V), or overcharge the battery
is over 1.225, battery is considered (over 14.8V).
defective. If gravity is under 1.225, STARTER MOTOR TEST
recharge battery and re-test. If cell- (12 Volt vehicles only)
to-cell gravity varies more than 0.025
(25 points), cell trouble may exist. If This test identifies excessive starter
charging does not bring gravity to fully current draw, which makes starting
charged level, the battery is either difficult and shortens battery life. Perform
sulfated or has lost active material. battery load test-first to make sure battery
is in “GOOD” condition.
4. RED LIGHT = BAD
Battery may be defective NOTE: ENGINE MUST BE AT NORMAL
(e.g. a bad cell). OPERATING TEMPERATURE.
NOTE: If pre-test battery voltage is below 1. Connect negative (black) clamp to
12.3V, tester will not allow and should not the negative (NEG, N, -) battery
perform the load test. Please fully charge post. Connect positive (red) clamp
battery and retest. to the positive (POS, P, +) battery
post. ROCK clamps back and forth to
TEMPERATURE 1 STEP = ensure a good electrical connection.
COMPENSATION 50 CRANKING AMPS Do not click “START TEST”.
Battery temperature +20˚F 0˚F -20˚F 2. Disable the system ignition so the
Decrease battery rating by 1 STEP 2 STEPS 3 STEPS vehicle engine will not start.
If the tester indicates poor battery 3. Crank the engine and note the voltage
condition, allow the battery to stabilize for reading during engine cranking.
a few minutes and check the open circuit 4. A meter reading of 9 volts or less
voltage with voltmeter. This is a good indicates excessive current draw.
measure of the percent charge in the This may be due to bad connections,
battery. The battery is considered charged a failing starter motor, or the
if it measures 75% or more. If it failed the battery is too small for the vehicle’s
load test with 75% charge or above, it requirements.
should be replaced. If the battery charge
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5. BEFORE RETURNING FOR REPAIRS
For information about troubleshooting,
contact customer service for assistance:
services@schumacherelectric.com
www.batterychargers.com
or call 1-800-621-5485
For REPAIR OR RETURN, contact Customer Service at 1-800-621-5485. DO NOT
SHIP UNIT until you receive a RETURN MERCHANDISE AUTHORIZATION (RMA)
number from Customer Service at Schumacher Electric Corporation.

6. LIMITED WARRANTY
SCHUMACHER ELECTRIC CORPORATION, 801 BUSINESS CENTER DRIVE, MOUNT
PROSPECT, IL 60056-2179, MAKES THIS LIMITED WARRANTY TO THE ORIGINAL
RETAIL PURCHASER OF THIS PRODUCT. THIS LIMITED WARRANTY IS NOT
TRANSFERABLE OR ASSIGNABLE.
Schumacher Electric Corporation (the “Manufacturer”) warrants this battery tester for six
(6) months from the date of purchase at retail against defective material or workmanship
that may occur under normal use and care. If your unit is not free from defective material or
workmanship, Manufacturer’s obligation under this warranty is solely to repair or replace
your product with a new or reconditioned unit at the option of the Manufacturer. It is the
obligation of the purchaser to forward the unit, along with proof of purchase and mailing
charges prepaid to the Manufacturer or its authorized representatives in order for repair
or replacement to occur.
Manufacturer does not provide any warranty for any accessories used with this product
that are not manufactured by Schumacher Electric Corporation and approved for use with
this product. This Limited Warranty is void if the product is misused, subjected to careless
handling, repaired, or modified by anyone other than Manufacturer or if this unit is resold
through an unauthorized retailer.
Manufacturer makes no other warranties, including, but not limited to, express, implied or
statutory warranties, including without limitation, any implied warranty of merchantability or
implied warranty of fitness for a particular purpose. Further, Manufacturer shall not be liable
for any incidental, special or consequential damage claims incurred by purchasers, users
or others associated with this product, including, but not limited to, lost profits, revenues,
anticipated sales, business opportunities, goodwill, business interruption and any other injury
or damage. Any and all such warranties, other than the limited warranty included herein,
are hereby expressly disclaimed and excluded. Some states do not allow the exclusion or
limitation of incidental or consequential damages or length of implied warranty, so the above
limitations or exclusions may not apply to you. This warranty gives you specific legal rights
and it is possible you may have other rights which vary from this warranty.
THIS LIMITED WARRANTY IS THE ONLY EXPRESS LIMITED WARRANTY AND THE
MANUFACTURER NEITHER ASSUMES OR AUTHORIZES ANYONE TO ASSUME OR
MAKE ANY OTHER OBLIGATION TOWARDS THE PRODUCT OTHER THAN THIS
WARRANTY.

Schumacher® is a registered trademark of Schumacher Electric Corporation.

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