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OWNER’S MANUAL
Model: PST-1000
Carbon Pile Charging System Analyzer
For 6 and 12 Volt Batteries
ELECTRIC CORPORATION
MT. PROSPECT, IL 60056
Send Warranty Product Repairs To:
Customer Returns
P.O. Box 280
1025 E. Thompson Avenue
Hoopeston, IL 60942-0280
Questions? Call Customer Service
1-800-621-5485
00-99-000443/1004
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PST-1000 IMPORTANT OPERATING & SAFETY NOTES READ BEFORE PROCEEDING WITH TESTS 1. Always work in a well ventilated area. Never start a vehicle’s 11. Keep spark producing devices at least 18" (0.5m) above the engine in an enclosed area. floor to reduce the hazard of igniting gasoline vapor. 2. Never smoke or allow any other open flame to come within 12. Route test leads away from belts and pulleys before starting 25 feet of the vehicle being tested. engine to avoid damage and possible injury. 3.
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EXTERNAL VOLTS LEADS (1 mg ohms) ANALYZER HOOK UP These leads may be used for measuring any DC voltage on a All of the test procedures of a vehicle’s equipment presume that vehicle when the test selector switch is placed in External posi- the battery will perform well enough. The battery test should tion. The voltmeter circuit is isolated and has an automatic polar- always be completed before performing other diagnostic ity indication. Typical applications are for measuring load volt- tests. age
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readings are taken, the battery should be charged five minutes Ratings can be found on the battery, in the vehicle manual or in a to stimulate mixing. (Refer to battery manufacturer’s replacement battery application guide. In the battery performance instructions regarding removal of vent caps while charging load test, the rated amperage is drawn from the battery for 15 battery). seconds while watching the battery voltage. At 70°F and higher, a good battery will maintain an output of 9.6 volts or
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4. Switch Amps probe to 1000A position, Adjust Amp Meter to Corroded or loose terminals, broken switches and damaged read zero using the Zero Amps knob. Be sure the Amp Probe cables will cause voltage losses. Voltage drops (losses) are mea- jaws are clean and fully closed. (If Amps probe battery is sured by connecting a voltmeter across the circuit parts and then low, replace it with new one first.) reading the voltage while the circuit is operated. 5. Place the Amp Probe around either analyzer
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VOLTAGE AMPS LIKELY CAUSE Below 9.6 High Bad starter or a very hot or cold engine Below 9.6 Low Bad Battery or Loose Battery Terminals Above 9.6 Low Bad Connections at Starter or Solenoid RED INSULATED-POS CIRCUIT TEST STARTER BLACK 1. Set the Volts Selector to “External” (±199.9V. scale) - NEG + + 2. Connect Volt test leads as shows in the following (Figure 3). BATTERY Clip from battery POS (+) post to the input terminal on the CHASSIS starter motor. Figure 4 Connection For GROUND-NEG CIRCUIT
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KEY SWITCH ALTERNATOR SYSTEM TESTS E. BATTERY GOES ABOVE 16V. The following test procedures will determine if there is a problem Regulator not working; field current always on full. If external in the diode stator, voltage regulator, electrical load requirements, regulator, look for a wiring harness short or a bad regulator or in the alternator amperage output. The tests can pinpoint prob- ground connection. See REGULATOR GROUND TEST lems to the wires and connection between the charging output t
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Causes of high voltage drops can be from LOOSE OR COR- REGULATOR GROUND TEST RODED CONNECTIONS at the output terminal of the alternator, Perform this test if the charging voltage is too high or varies more the car’s ammeter, battery terminal connection on the starter so- than 0.2V with steady RPM and electrical loading. lenoid, battery cable connections, faulty wiring from alternator to 1. Set Voltmeter to External ±199.9V regulator, to ammeter, to starter solenoid, or between the alter- 2. As s
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CIRCUIT ARRANGEMENTS ALTERNATOR Most 24 volt circuits utilize combinations of 12 volts batteries to OUT provide 24 volts to the starter motor, controls and accessories. A FIELD CHASSIS battery (or bank of batteries) is used for the engine’s 12 volt circuits, and a CRANKING battery (or bank of batteries) is added to the circuit to provide 24 volts to the starter motor. JUMPER Occasionally you may encounter banks of six volt batteries, or DISCONNECT even a single 24 volt battery. Six volt batterie
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3. Place the Amp Probe around the starter cable. ALTERNATOR OUTPUT CURRENT TEST 4. Connect the external volts positive lead to the positive terminal TRANSFORMER RECTIFIER of the starter. There are two separate output wires. A 12 volt, high current out- 5. Connect the external volts negative lead to the starter ground. put feeding the CHASSIS battery and a 24 volt, low current out- put, feeding the CRANKING battery. (See diagram below). 6. Set the Volts Selector to External Volts ±199.9 volt rang
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SWITCH 24 Volt Output The 24 volt TRANSFORMER-RECTIFIER output only charges ALT the CRANKING battery after the starter motor has drawn current SERIES from the battery. The following procedure should be used to simu- PARALLEL SWITCH late a recent starter draw and test for output current. 1. Stop the engine. + + CHASSIS BATTERY 2. Connect the Analyzer’s Load cables across the Cranking - battery. + 3. Place the Amp Probe around either Analyzer Load cable. 12V LOADS CRANKING BATTERY STARTER 4. App
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LIMITED WARRANTY SCHUMACHER ELECTRIC CORPORATION, 801 BUSINESS CENTER 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 one year from date of purchase at retail against defective material or workmanship. If such should occur, the unit will be repaired or replaced at the option of the manufacturer. It is the obligati
