Final answer:
Deploying blank measurements or measuring outdoor air is called null measurements. Null measurements are a technique for measuring current and voltage more accurately by balancing the circuit so that no current flows through the measurement device.
Step-by-step explanation:
Deploying blank measurements or measuring outdoor air is called null measurements. Null measurements are a technique for measuring current and voltage more accurately by balancing the circuit so that no current flows through the measurement device. Digital meters that employ solid-state electronics and null measurements can achieve high accuracies.