The Midtronics MSP-070C is a 70A Battery Maintainer designed for safe, efficient, and accurate charging and testing of rechargeable lead-acid type batteries. It functions as a power supply, converting 120-240 volts nominal AC to a selectable DC voltage of 14.4V, 13.6V, or 13.2V. The unit automatically shuts down its output to conserve energy and protect the vehicle once the battery is fully charged and no current is being drawn from the vehicle.
Function Description:
The MSP-070C is primarily a battery maintainer and charger. It is designed to provide a stable power supply for various applications, ensuring batteries are kept at optimal charge levels. It supports different battery chemistries including Lead Acid, AGM, and EFB. The device is equipped with safety features to prevent common issues like reverse polarity, non-12V battery connection, clamp connection problems, and battery voltage too low. It also includes temperature detection for both the clamps and the battery itself to prevent overheating or charging frozen batteries.
Important Technical Specifications:
- Input Voltage: 110V-240V~, 50-60 Hz, 12A max.
- Output 1: 14.4VDC max., 70A max.
- Charge Cables: Available in 2m (Standard), 3m, and 5m lengths.
- Power Cord: Accepts locking C13 connector; United States version uses EMA 5-15 termination, rated at 15A/125V UL CSA.
- CCA Range: 100-2000 CCA.
- Dimensions (without handle or base):
- Height: 4.80 in (12.19 cm)
- Width: 13.1 in (33.27 cm)
- Length: 12.0 in (30.48 cm)
- Weight: 18 lbs.
- Safety Certifications: UL1236, IEC 60335.
- EMC Compliance: EN61000-6-4 (Emissions) CISPR 11 Class A, EN61000-6-2 (Immunity), EN61000-3-2 (Harmonics), EN61000-3-3 (Flicker), CEC, California Energy Commission.
Usage Features:
- Selectable Voltage Switches: Allows users to choose between 14.4V, 13.6V, and 13.2V. The "Master" setting allows the unit to operate standalone and control other slave units, while the "Slave" setting allows it to be controlled by another device via the CAN port, matching the controlling unit's output. The "Off" setting is for when the unit is not in use.
- Charging Cable Connections: Features quick connectors that rotate 180° clockwise to lock onto the Quick Connector Locking Post.
- CAN Bus Cable Connections: Provides connectivity for communication with other devices.
- Circuit Breaker: Included for electrical protection.
- Indicator LEDs: Power, Charging, and Error LEDs provide visual feedback on the unit's status. Error codes are communicated via flashes of the red LED, with specific codes indicating issues like reverse polarity (01), connection problems (02), non-12V battery connected (03), battery voltage too low (04), internal current/voltage/temperature failure (08, 09, 10), cable temperature sensor issues (11, 12), charge/sensing cable problems (13, 14), battery temperature exceeding/below thermal limit (15, 16), and unit internal error (20).
- Cooling Fans and Vents: Located on the side and back of the unit to ensure proper airflow and prevent overheating.
- Locking Power Cord: Features red tabs on each side of the connector for secure attachment and easy release from the charger's power socket.
- Battery Connection Procedure: Emphasizes connecting the positive (red) clamp to the positive battery terminal first, then the negative (black) clamp to the negative battery terminal. Disconnection follows the reverse sequence.
- AGM Battery Precaution: Users are specifically warned NOT to use the 14.4V setting when charging an AGM battery.
- Safety Guidelines: Comprehensive guidelines are provided covering general safety, personal precautions, preparation for charging, grounding, charger location, and DC connection precautions. These include warnings about explosive gases, charging non-rechargeable batteries, proper handling of battery acid, avoiding sparks, and ensuring adequate ventilation.
Maintenance Features:
- Cleaning: Regular cleaning of battery terminals and clamps with a mixture of baking soda and water, or mild hand-soap and a bristle brush, is recommended to prevent corrosion and ensure efficient charging.
- Storage: The charger should be stored in a safe, dry location and maintained in perfect condition. When not in use, it should be kept on its stabilizing base, secured with Phillips-head screws.
- Damage Prevention: Users are advised to protect the charger and test cables from damage and premature wear. The unit should not be operated if it has received a sharp blow, been dropped, or otherwise damaged, and should be taken to a qualified service center for repair. Disassembly by unauthorized personnel is discouraged.
- Power Cord Management: Always use the red tabs to release the power cord. The power cord and DC leads should be positioned to avoid tripping hazards and damage from moving engine parts, heat, oil, and sharp edges.
- Extension Cord Use: Discouraged unless absolutely necessary, and if used, specific requirements for wire size, proper wiring, and plug compatibility must be met.
- Ventilation: The charger must be located in an area with sufficient air space to allow unrestricted airflow. Articles should not be placed on or around the charger in a way that restricts cooling air.
- Frozen Battery Precaution: Never charge a frozen battery; it must be thawed first.
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