With instruments to measure the most lateral of the two lead wires of voltage and current values. Measuring voltage and about equal to the total voltage ≥ 33V
With instruments to measure voltage and current values of the outermost two lead wires. The measured voltage approximately equal to the total voltage ≥33V
Measurement of the voltage current value of the two leading line of the two leading out of the instrument. And the measurement voltage is equal to the total voltage greater than 33V