Lascar dpm 2as bl 3 5 digit lcd voltmeter lascar dpm 2as bl this 3 5 digit panel mounting voltmeter has a 200mv measurement range and features led backlighting and a negative rail generator that allows the meter to measure a signal referenced to its own power supply ground the housing design enables the meter to be easily snapped into a panel lascar dpm 2as bl 3 5 digit lcd voltmeter