The Russian Civil War. After the overthrow of the Provisional Government on 7th November, 1917, the All-Russian Congress of Soviets met and handed over power to the Soviet Council of People's Commissars.
A voltmeter is used to measure potentials as shown in Figure 1. The voltmeter has two clips that are colored red and black. When the red clip is connected to the anode and the black clip is connected to the cathode, a positive voltage is detected as shown in Figure 1. If the clips are backwards, a negative voltage is detected. In order to practice using the voltmeter, you can measure the potential of a closed battery. Turn on the meter and if it is not set to voltage push the + button once or twice. 1) Measure the potential difference of a AA (1.5 V) battery.
The general design of an ACR or VSR has been intended to only connect the two battery systems when the engine is running, that is, when the engine is putting out charging current and the engine starting battery has reached a full-charge terminal voltage. In most cases this will occur only when the engine is running. However, it is possible that if both batteries are near full-charge, an ACR or VSR could be fooled by the high resting voltage of the two batteries, and the voltage on the sense line may be high enough to trigger the switch to the ON condition.