Rechargeable battery is the main source of electricity in the car. If the battery is in working condition, it ensures the continuous availability of light in the cabin, the activity of the dashboard indicators, heating the stove, start the engine, other. Performance is checked not only after a certain period of operation, but also when buying, to be confident in its serviceability. There are several proven ways, as you can scroll the car battery at home without referring to the service center.
How to check the car battery for performance multimeter
With a complete charge, the battery gives out voltage from 12.5 to 12.8 V. This measurement is carried out at the incident 2 hours from charging the battery.
How to work with a multimeter:
- You need to put a voltmeter into direct current mode.
- Next, set the diagram of the red color in the current measurement socket from 10 to 20 A.
- Now the probe is subject to rechargeable terminals for 2 seconds.
- The contact time is not more than 2 seconds, so as not to spoil the battery. Then the resulting parameters with numbers designated in documents for AKB are checked.
How to check the car battery on the load for the load fork
The second step is to check under load. The special device "Load fork" consists of a voltmeter, load helix and clamp.
How to work with a load fork:
- The clamp joins the minus battery, and the fork relates to a plus on the terminal.
- To withstand in this position for 5 seconds. And remember the latest results on the voltmeter.
- Indicator 9 B means the availability of the battery.
How to check the car battery for performance - electrolyte level
Some Akb models are equipped with comfortable marks, through which the electrolyte level is seen: the upper one is maximum in terms of volume, the lowest is minimum. In the case when there are no marks, plugging plugs are unscrewed. Normal level - electrolyte covers plates by 15 mm.
The process of checking the level of electrolyte:
- A tube with a diameter of 3 mm is taken, immersed in the electrolyte and rests on the plate.
- Next, it is pulled out and watch the fluid level. If the amount of electrolyte is insufficient, the plates look out.
- It is important not to miss this moment and take action, because they will be destroyed and disable the entire battery.
- Increase the level of electrolyte can be topped with distilled water. After that, charging the battery.
How to check the car battery for performance - electrolyte density
Once every 3 months, the electrolyte density is measured for prevention. Low concentration affects the level of charge. Water evaporation occurs for the reasons of long use and improper charging. The areaometer is a special device designed for such purposes. So that there were no mistakes, the main thing is to know, in the hot season, the density is always greater. Optimally operated at a temperature of 25 ° C.
Electrolyte density check:
- On the battery tweaked plugs.
- The hydrometer is inserted into each hole and absorbed the electrolyte.
- Good density - the float pops up to the green zone on the scale with the results 1.26 - 1.30 g / cm3. Indicators are written in Notepad.
- When the float is sinking to a white or red zone of the scale, you should increase the concentration. There are several options to do it. You can simply charge the battery, in other situations they pump a new electrolyte. For this, the old roll over and change to a mixture of distilled water and sulfuric acid.
Each car owner has problems with the health of the battery. Especially the failures are already after a long service life. In any case, it is necessary to be able to independently check the power element for performance. Before the examination, it is appropriate to familiarize yourself with the signs of malfunction, designate the conditions in which the device was operated. Remember the shelf life, perhaps the problem is in this.
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