MICRO-POWER SMP User manual

SMP
SERVICE CHARGER
User manual

Safety.......................................................................................................................................................................... 3
Safety precautions....................................................................................................................................................... 3
Warning information..................................................................................................................................................... 5
Graphical symbols........................................................................................................................................................5
Introduction................................................................................................................................................................ 6
Receiving.................................................................................................................................................................... 6
Installation.................................................................................................................................................................. 6
Operation.................................................................................................................................................................... 6
Contact information...................................................................................................................................................7
SMP - Service charger
2023-01-25 2

Valid for SMP 120/10 Battery charger
Safety
Safety precautions
Read the instructions. The manual contains important safety and operating instructions. Always keep
this manual nearby the product.
Read and understand this instruction, the battery instruction provided by your battery manufacture, and your
employer’s safety practice, before using, installing, or servicing the product.
Only qualified personnel should install, use, or service this product.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
NOTE
Always connect the battery cables before connecting mains. Disconnect mains before disconnecting battery
cables.
Intended use
The battery chargers are intended for charging lead acid batteries.
Battery charger adjustment
The charger must be adjusted to each type of battery to be charged (Freely Ventilated FVLA or Valve regulated
VRLA).
Each charger can be ordered as pre-adjusted with charging curve and parameters optimized for a specified battery.
Before start charging
Ensure that the charger is adjusted for the battery type. The following must be set for each individual battery type
before charging:
•Charging curve.
•Battery voltage settings.
•Capacity Code
For further information, see Parameter settings.
WARNING
Incorrect settings of the battery charger may damage the battery and generate explosive gases from the battery
during charging. Always check settings before start charging.
ELECTRIC SHOCK
WARNING, risk of electric shock. High voltage inside. The battery charger contains voltage at a level
that can cause personal injury.
SMP - Service charger
2023-01-25 3

WARNING, risk of electric shock. High output voltage. Do not touch uninsulated battery terminals, con-
nectors or other live electrical parts.
WARNING
Disconnect the battery and power supply before maintenance, servicing or dismantling.
Do not touch uninsulated battery terminals, connectors or other live electrical parts.
Check that the power supply at the site of the installation complies with the rated voltage specified on the battery
charger’s data label.
Before connection, check the marking on the battery and the battery charger.
The battery charger may only be connected to a power outlet with protective earth.
Do not operate the charger if there is any evidence of damage.
If the supply cord is damaged, the charger should be scrapped.
If a stationary appliance is not fitted with a supply cord and a plug, or with other means for disconnection from the
supply mains, disconnection must be incorporated in the fixed wiring in accordance with the national wiring rules.
EXPLOSIVE GASES
WARNING, explosive gases. Lead-acid batteries generate explosive gases during charging.
No open flame. Fire, open ignition source and smoking are prohibited near battery.
Well-ventilated. Always provide proper ventilation during charging.
WARNING
Risk of explosion!
Explosive gases. Prevent flames and sparks. Provide proper ventilation during charging.
State that during charging, the battery must be placed in a well-ventilated area.
Do not smoke, cause sparking or use open flames near battery.
Do not disconnect the battery charger terminals when the charging process is in progress. Sparks may occur and
cause hydrogen explosion when charging lead acid batteries. Arc flash may occur and damage the connector pins.
Always stop the charging process by disconnecting the mains before disconnecting the battery.
Do not keep inflammable material close to battery charger.
Incorrect settings of the battery charger may damage the battery and generate explosive gases from the battery
during charging. Always check settings before start charging.
Do not charge non-rechargeable batteries, damaged batteries or battery types not intended for the charger.
SMP - Service charger
2023-01-25 4

Warning information
Hazardous situations and precautions are presented in the text as follows.
WARNING
Indicates a potentially dangerous situation. Death or serious injury may occur if appropriate precautions are not
taken.
CAUTION
Indicates a situation where damage or injury could occur. If it is not avoided, minor injury and/or damage to
property may result.
NOTE
General information not connected to safety for person or the product.
Graphical symbols
The following graphical attention symbols may appear on the products and in the documentation.
Read the instructions. The manual contains important safety and operating instructions.
Stop operation. Always stop the charging by pressing the STOP button before any disconnection.
WARNING, risk of electric shock. High voltage inside. High output voltage. Do not touch uninsulated
battery terminals, connectors or other live electrical parts.
CAUTION, undesirable consequences. The situation needs operator awareness or action.
For indoor use only. The battery charger is designed only for indoor use unless the charger is at least
IPX4-rated.
Well-ventilated. Always provide proper ventilation during charging.
WARNING, explosive gases. Lead-acid batteries generate explosive gases during charging.
No open flame. Fire, open ignition source and smoking are prohibited near battery.
Wear protective gloves. The battery cables / battery connectors may become hot during charging.
SMP - Service charger
2023-01-25 5

Introduction
SMP is a High Frequency Charger and DC Power Supply developed for service needs as well as for your
electronic laboratory.
SMP is a perfect help when servicing of batteries and chargers since it is so small and handy. This unit is extremely
suitable for the purpose of desulphating batteries. It is also useful as an aid to start deeply discharged batteries.
Receiving
On receipt, visually inspect the product for any physical damage. If necessary, contact the transport company.
Check the delivered parts against the delivery note. Contact your supplier if something is missing, see Contact
information.
Installation
Install the battery charger indoors in a dry, clean and well-ventilated environment, unless the charger is
at least IPX4-rated.
If several chargers are to be mounted next to each other, they may not be located so that exhaust air from one
charger blows into the air intake of another charger.
Install the charger so gasses from the charging does not get sucked in by the chargers fans.
Operation
The SMP is equipped with an mains switch and two potentiometer knobs for adjustment of voltage and current
levels. There is also a push button, which shows the set limit values when pressed. In effect, voltage and current
levels will never increase above adjusted levels.
Adjustments
Are done with knobs market VOLTAGE and CURRENT as well as the SET button. The SMP has to be connected
to an electric load to be able to see any current draw on the display.
Voltage
Turn the setting knob marked VOLTAGE until the desired output voltage is shown on the display.
Current
Turn the setting knob marked CURRENT until the desired output current is shown on the display.
Voltage limit
Press the SET button while adjusting the desired voltage limit with the VOLTAGE knob.
Current limit
Press the SET button while adjusting the desired current limit with the CURRENT knob.
CAUTION
Turn the controls to the 0 position (turn counterclockwise) before connecting the battery or starting charging. This
should be done to avoid unintentionally high voltage / current.
SMP - Service charger
2023-01-25 6

Example
Example of adjustment when desulphating batteries
Typical for a sulphated battery is that the capacity is low even if the charger show fully charged. The total charging
time normally tends to be rather short and the specific gravity is lower than for a normally fully charged battery.
The SMP-charger can be a very good aid to recondition batteries. A constant low DC-current during a long period
of time is needed (2-14 days). A rule of thumb is that the voltage should not override 2.8V/cell and the current
should only be 0.8-1.0% of the battery capacity (Ah).
NOTE
It is critical, not to increase the current level in the belief to speed up the desulphating process. It can only destroy
the battery through over-heating.
Practical example
Let’s assume that we have a 48V battery on 500 Ah capacity. A suitable voltage according to above information
should be 2,8 V/cell × 24 cells = 67.2 V. The adjusted current should be 0,8 x 500 Ah / 100 = 4, i.e. 4.0 A (0.008 ×
500 = 4).
Action to be taken:
1. Connect the SMP to the battery and turn on the charger using the mains switch on the back of the SMP.
2. Press the SET button and adjust the voltage limit to 67.2 V using the VOLTAGE knob.
3. Press the SET button and adjust the current limit to 4.0 A using the CURRENT knob.
NOTE
To maintain the set values, the setting knobs must now not be turned.
Please have in mind that this charger will limit the output effect to 800 W.
The top display will now show the actual voltage level that slowly increases to max. 67.2 V. In the meantime the
lower display will show the adjusted current level. To verify the set values, press the SET button.
The desulphating process is only ready when battery voltage and specific gravity is stabilised. In cases when only
the weekends are available for desulphating you can continue the following weekend.
Contact information
Micropower Sweden AB
Idavägen 1, SE-352 46 Växjö, Sweden
Phone: [phone]
e-mail: [e-mail]
www.micropower-group.com
SMP - Service charger
2023-01-25 7