MASTERCharger 
Battery Charger-Analyzer for large battery systems (10A-Hr to 50/60A-Hr)

• Available as:
•     MasterCharger LR (Rebuilt, 50A)
•     MasterCharger LN (New, 50A)
•     MasterCharger LX (New, 60A)
  
• The MASTERCharger is a precision instrument designed to charge and analyze primarily NICKEL-CADMIUM batteries exactly as recommended by the battery manufacturers (It can also test LEAD-ACID and other types of rechargeable batteries,
• The simple to set controls plus the condensed operating procedure found on the front panel makes the MASTERCharger a very easy to operate CHARGER/ANALYZER, which combined with easy to read CURRENT, VOLTAGE, TIME and STATUS indicators, makes it also a very simple unit to monitor.
• The MASTERCharger is also designed for speed, for it can charge two Nickel-Cadmium batteries, (actually, any number of batteries where the total number of cells is 50 or less), at maximum currents, and it can also discharge two batteries at reduced currents, or one battery (25 cells or less) at maximum current.
• The MASTERCharger also provides a Voltage Control enhancement that allows the Charger-Analyzer, originally designed for Constant Current operation on Nickel-Cadmium batteries to also be able to handle Lead-Acid and other type of rechargeable batteries, where the end voltage is a more reliable indicator of the state of charge (as opposed to Nickel-Cadmium batteries).
• Dependability is another great plus of the MASTERCharger. 100% SOLID STATE circuitry requires no scheduled maintenance. No relay contacts to inspect and clean. No high current carrying contacts to arc and burn. A simple performance verification procedure is all it takes to determine if the instrument requires re-calibration or repair.
• This instrument is also protected against certain internal performance deviations and programming errors, plus it is also designed to sense certain battery abnormalities to protect the instrument and battery from possible damage. In the event that any malfunction takes place, VISUAL and AUDIBLE indicators will turn on, alerting the operator and preventing any further operation of the unit.
• The MASTERCharger Battery Charger/Analyzer System is comprised of the Charger/Analyzer, the Temp-plate, the Battery Cable and several accessories.
• The specially designed circuity provides a performance not achieved by any of the older conventional battery charging methods. The MASTERCharger will deliver current into a short circuit or a battery or combination of batteries totaling 50 cells, within ±1% of the programmed value, independent of line voltage variations (within ± 10% of the nominal line voltage).
• Two 3-1/2 digit LED meters provide the simultaneous monitoring of voltage and current on the charger and battery under test. The voltmeter can also be used independently by way of the two external meter lead jacks.

SPECIFICATIONS

1.1 CONTROL: SCR.
1.2 MAXIMUM CURRENT: 40 AMPS 
1.3 MINIMUM INCREMENT: 0.1 AMP.
1.4 ACCURACY and STABILITY of settings: ± 1% of reading, ±0.1 AMP.

FLOAT: The reference voltage is set at the equivalent of 2.33V/cell (Lead-Acid). The Cell Selector provides the basic reference as nominal battery voltage, eg: a 24V battery is entered as 24 on the Cell Selector.
Current reduction from within .5V of the float voltage, with an accuracy of ± 0.5%, ±0.1A

PEAK: The reference voltage is set at the equivalent of 2.45V/cell (Lead-Acid). The Cell Selector provides the basic reference as nominal battery voltage, eg: a 24V battery is entered as 24 on the Cell Selector. Voltage transfer within ± 1% of the Peak Voltage.

1.5 MODES: Main and topping for Constant Current plus Constant Voltage and Peak Voltage.
1.6 TIMER: 1 to 9 hours for MAIN charge time and 1 to 60 hours for TOTAL time. Time can also be programmed in minutes by selecting the FAST mode in the TIMER circuit board.
1.7 OVERTEMP PROTECTION: Four thermistors on the TEMP-PLATE measure the battery temperature, and cut-off the charge when the surface temperature of the TEMP-PLATE reaches 39^oC.
1.8 OVER/UNDER CURRENT PROTECTION: A Monitor circuit continuously compares the actual charge current with the programmed value and terminates the operation if they differ by more than 1 AMP.
1.9 OVERVOLTAGE PROTECTION: Programmable, in accordance with the number of cells selected, at the equivalent of 1.7 volts/cell, with an absolute maximum internal limit set at 85 VOLTS (CC mode only).
1.10 REVERSE POLARITY PROTECTION: Operation of the unit is inhibited for reverse voltages greater than 0.5V.
1.11 FUSING: Aircraft type current limiter

a) NORMAL: Timer advances at the rate of one count per minute (HH:MM).
b) FAST: Timer advances at the rate of one count per second (MM:SS).
c) TEST: Timer advances at the rate of 60 counts per second (SS:SS/60).

3.4 POWER FAILURE PROTECTION: An internal rechargeable battery maintains (for several hours) the clock and other vital circuits for a dependable resumption of operation after a power failure.

115V/208V/230/245VAC, 50-60Hz.

5.1 VOLTMETER:

Scale: 2V, 20V and 200V (1.999V, 19.9V and 199.9V) for external measurements and 20V and 200V for internal (battery) measurements.

5.2 AMMETER:

Scale: 200A (199.9A)

6.0 PROTECTION:

Circuit Breaker for line input, current limiters for charge and discharge and fuses for electronic protection.

7.0 AMBIENT:

5^o C to 35^o C (consult factory for extended temperature operation)

Note: Specifications subject to change without notice

Manual

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Copyright © 2008 JFM Engineering, Inc. --- Last modified: March 01, 2008