If you suspect this is killing your battery during storage, you might be wise to disconnect the battery or remove it entirely. So, systems such as the clock, computer and alarm use some power.
One thing to bear in mind is that all modern cars experience 'parasitic loss', which is when something electrical drains the battery even with the engine turned off. A battery that reads 12.2V is actually only 50% charged, and is classed as discharged below 12V.
The resting voltage should ideally be no lower than 12.6V. If you get a reading with a minus in front of it (-12.6 rather than 12.6) you've got the probes the wrong way round! Touch the red probe to the positive (usually red) terminal, and the black probe to the negative (black) terminal. Set the dial to 20, which will allow you to accurately measure between 0-20 Volts. The first test with your multimeter will measure DC voltage, indicated with a solid line and a dashed line above a letter V.
#BATTERY STATUS METER HOW TO#
Jump starting a battery: the right and wrong ways to do it How to check a car battery with a multimeter Once the battery is exposed, be extremely careful that nothing metal touches the terminals and causes a short, so don't rest wrenches or other tools on top of the battery. There may also be a red cover over the positive (+) terminal that will lift off or snap open, too. In modern cars, the battery will often have a plastic cover which will unclip, hinge up, or occasionally require removing with a few bolts or screws. At this point the meter is programmed for the correct battery chemistry and cell count, so it should be accurately measuring the current state of charge (SOC).Using a multimeter to test a battery is easy. The first thing to do is make sure you can access the battery terminals (the metal connections on the top or front of the battery).īatteries are commonly located in the engine bay to one side of the engine. If the battery is not immediately obvious when you open the hood, consult the owner's manual. When you have chosen the correct preset, press the O button to return to main screen. You can use the K+ and K- to scroll through the available menu options. The display will show the current battery preset that is selected. With the meter powered off, press and hold the K+ on the back and power on the meter. Please refer to the knockout reference table below. In most installations, you will need to knock out an additional 1mm on each side for the tabs to fit in the knockout. The meter will require a rectangular knockout to insert and is held in place by pressure-fitting tabs on each side. Make sure to pay attention to the orientation of the plug before inserting. The back of the display has a B- (Battery Negative) and B+ (Battery Positive) marking indicating the correct polarity for installation. Next, you will need to insert the 2 pin plug on the pigtail into the rear of the meter. Connect the Black wire to your batteries Negative (-) terminal and connect the Red wire to your batteries Positive (+) terminal. In some cases, this length will be too short so it is suggested to splice on any additional length that you might need. The meter is supplied with a 7in long pigtail to hook up to your battery. The BVM-100 can be easily programmed on the go and does not require any Rev additional tools or devices to program out in the field. This unit is compatible with most Lithium, Lead Acid, and Lithium Iron Phosphate batteries ranging from 12-60V. The meter accurately measures your batteries state of charge (SOC) and voltage. The Powerwerx BVM-100 is a battery capacity meter that acts like a fuel gauge for your battery.
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