Electronic bench testing verifies electrical test measurements with more precision than compact models or protects electrical components from electrostatic discharge. Bench testing power supplies and accessories convert AC to DC power. They regulate, protect, and monitor current and voltage. Battery capacity analyzers and accessories verify the remaining voltage on critical battery backups. Antistatic safety equipment tests for or protects from static discharge to protect sensitive electronics from damage during handling. Bench pressure calibrators verify a pressure gauge, switch, or transducer is measuring correctly and adjust discrepancies. Bench type digital multimeters verify precise current, voltage, frequency, and resistance. LCR meters verify the inductance, capacitance, and resistance of the device to determine its impedance. Function and pulse generators work with an oscilloscope to test the frequency of electrical equipment.