The electrometer amplifier (gain factor 1) is an impedance transformer with extremely high-resistance voltage input and low-resistance output.The unit is used with a connected voltmeter to conduct the following measurements:1. For quasi-static voltage measurement up to 10 V DC.2. For high-resistance measurement of voltages greater than 10 V with an ohmic voltage divider consisting of resistors module.3. For quasi-static measurements of voltages greater than 10 V DC with a capacitive voltage divider consisting of capacitors module.4. For measurement of very small currents using plug-in resistors module up to 10 G ohm as shunts.5. As a charge meter as low as 10-9A-Sec, with capacitors module from 1000 nF to 1 nF.