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Summary of Contents for Power Products ALPHA C-20
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Page 1: Battery Charger
ALPHA C-20/25 BATTERY CHARGER OPERATING MANUAL Power Products Inc. • 27 Pamaron Way, Bldg. E • Novato • CA 94949 Tel: (415) 883-6300 • Fax: (415) 883-6302 www.power-products.com... -
Page 2: Table Of Contents
TABLE OF CONTENTS 1. SYSTEM OVERVIEW ............3 SYSTEM OVERVIEW ............3 DISPLAYS AND CONTROLS ..........3 2. INSTALLATION .............. 6 LINE VOLTAGE ..............6 TERMINALS ................. 6 SPACE REQUIREMENTS ............ 6 3. OPERATING GUIDE ............7 CHARGE CHARACTERISTICS ..........7 CHARGING METHODS ............ -
Page 3: System Overview
(see figure 1-1 and 1-2). NOTE: A trimpot for the 12 Volt, and a trimpot for the 24 Volt constant potential setting has been added for adjustment of the end of charge voltage. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 3... - Page 4 Turns unit on start charge or off DC LINE FUSE DC LINE CONNECTORS Fuse protecting Connects for DC cable DC line leading to battery Figure 1–1. Front view of Alpha C-25 ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 4...
- Page 5 1. SYSTEM OVERVIEW COOLING FANS AC LINE FUSE AC VOLTAGE SELECT SWITCH Selects mains input voltage (120 or 230 volts) AC MAINS CABLE Figure 1–2. Rear view of Alpha C-25 ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 5...
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Page 6: Installation
The Alpha C-25 system occupies 15" x 5 ¾" (381 mm x 146 mm) of tabletop space. Place the unit on a sturdy workbench in a well-ventilated battery servicing area with the battery adjacent to it. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 6... -
Page 7: Operating Guide
The constant current charge characteristics of a lead-acid cell with respect to cell voltage, ampere-hours input, specific gravity and rate of gassing at constant current can be seen in figure 3-1. Figure 3-1. Charge characteristics of a lead-acid cell ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 7... -
Page 8: Charging Methods
However, it is necessary to ensure that the battery is not charged at a high rate for an excessive period of time. Such overcharging can result in overheating, excessive gassing, and possible damage to the battery. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 8... -
Page 9: Preparation For Charging
Before starting charging the battery, read the component maintenance manual (CMM) or the Instructions for Continued Airworthiness (ICA) for the specific battery. Ensure that the charge time and current or voltages from the battery manufacturer are followed. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 9... -
Page 10: Verify End Voltage
A. SWITCH OFF MAINS POWER Turn off the AC on-off/reset power switch. B. TURN DOWN CHARGE CURRENT Repeatedly turn the Ampere Adjust knob fully counter-clockwise to set charge current to zero. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 10... -
Page 11: Charge Time
1) Constant potential 14.3 volts; 2) Constant current; or 3) Constant potential 28.5 volts. If two batteries are to be charged simultaneously, they will both be charged using the selected charge mode. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 11... - Page 12 Turn on the AC on/off power switch. The voltmeter reads the battery terminal voltage, the ammeter reads zero, the Off lamp illuminates and the red LED on the timer is off. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 12...
- Page 13 2. FOR CONSTANT-POTENTIAL CHARGING Turn the Ampere Adjust knob to max (fully clockwise) or to the desired current limit. The charge current is displayed on the ammeter as the current is being adjusted. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 13...
- Page 14 When charging is restarted the timer is reset to zero. It may be necessary to adjust the parameters (current and time) before resuming to charge. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 14...
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Page 15: Calibration And Maintenance
Current Verification - Connect C-25 to a discharged battery and charge at approx. 20 Amps. Using an external calibrated digital meter (set to millivolt scale), connect to ammeter test jacks and verify panel meter is within approx. 0.3 Amps. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 15... -
Page 16: Shunt Verification
14.3 or 28.5 volts. Trim if necessary or if different voltages are required. 4.3.2 MODIFYING MAXIMUM VOLTAGE SETTING To modify the maximum voltage limit in constant-current mode adjust the R11 trimpot on PCB BD50PC. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 16... -
Page 17: Maintenance
Connector and exchange the old fuse (see picture 1-1 in section 1). 4.4.4 CLEANING AGENTS Do not use acetone and other similar cleaning agents on the meters, timer or any plastic part. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 17... -
Page 18: Troublshooting
The nickel-cadmium battery Check all terminals and inter-cell inter-cell connectors are loose connectors. Set a low discharge or contaminated causing high current and look for arcing or heat resistance generation. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 18... -
Page 19: Specifications
20A/250V, type MDA 1 1/4 x 1/4 DC line fuses Two 35A/32V, type AGC 1 1/4 x 1/4 Modes: 1) Constant Current mode without voltage limit 2) Constant Potential mode for 12 volt and 24 volt batteries. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 19... -
Page 20: Appendix A - Battery Overview
CP mode. The lead-acid battery is the most widely used of the secondary battery types. Major applications include automobiles, aircraft, aircraft support equipment, and various industrial applications. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 20... -
Page 21: Nickel-Cadmium Batteries
12-volt battery. For example, a 24-volt battery rated at 30.0 ampere-hours should deliver 30.0 amperes for a minimum of 51 minutes before reaching the 20 volt EPV (end point voltage) . This is a one-hour, C -rate discharge. ALPHA C-20/25 CHARGER – OPERATING MANUAL V1.0 Page 21... -
Page 22: Warranty
WARRANTY 1 YEAR WARRANTY POWER PRODUCTS warrants its products to be free from defects in workmanship and material for a one year period from the date of shipment to the distributor, original equipment manufacturer (OEM), or original end user. If any product shall prove to be defective during the warranty period, POWER PRODUCTS will repair or replace such part. -
Page 23: Certification Of Calibration
DATE OF FIRST USE: _____________ Power Products Inc. certifies that the above listed instrument meets or exceeds all published specifications. It has been calibrated using Standard MIL-STD I45208 whose accuracies are traceable to the National Institute of Standards and Technology. - Page 24 Designer and manufacturer of aircraft lead-acid and nickel-cadmium battery support equipment since 1980. Headquarters and main plant located in Novato, California. CONTACT INFORMATION: POWER PRODUCTS, INC. 27 PAMARON WAY, BLDG. E NOVATO, CA 94949 PH: 415-883-6300 FX: 415-883-6302 WWW.POWER-PRODUCTS.COM...
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