BVM-40 Battery Voltage Monitor User's Guide - Alber

General Description3. General DescriptionThe Albér BVM-40 Battery Voltage Monitor helps ensure that jars used in battery backupsystems will perform when needed. The BVM continually reads the voltages of up to 40 jars thateach have a nominal voltage of 12VDC. An easily readable, backlit LCD (liquid crystal display)screen indicates each jar voltage, minimum, maximum and average jar voltage, and overall stringvoltage.Two front panel push buttons are used to light the LCD screen, view readings, set up the unit, andcalibrate the unit when necessary. The buttons are either pressed independently or together toenable the various functions. The light on the LCD goes off after about one minute. Pressing theup or down button turns the light back on.The power switch is on the rear panel. The BVM may be left powered on continuously with noadverse effects.3.1. DefinitionsJar – The container that holds a cell or group of cells. In this manual, the term jar refers toone 12 volt battery consisting of six cells.Cell – The basic electrochemical unit that delivers electrical energy. Common usage permitsthe use of the word battery when referring to a cell, although it is technically incorrect. Thenominal voltage of a cell is 2 volts.Battery – Two or more cells (or jars) connected together electrically.3